nichia sts-da1-2578 nichia corporation specifications for uv led NCSU275(t) pb-free reflow soldering application built-in esd protection device rohs compliant
nichia sts-da1-2578 1 specifications (1) absolute maximum ratings item symbol absolute maximum rating unit forward current i f 700 ma pulse forward current i fp 1000 ma allowable reverse current i r 85 ma power dissipation p d 2.87 w operating temperature t opr -10~85 c storage temperature t stg -40~100 c junction temperature t j 130 c * absolute maximum ratings at t s =25c. * i fp conditions with pulse width 10ms and duty cycle 10%. (2) initial electrical/optical characteristics item symbol condition typ max unit forward voltage v f i f =500ma 3.7 - v radiant flux e i f =500ma 370 - mw u405 peak wavelength p i f =500ma 405 - nm forward voltage v f i f =500ma 3.6 - v radiant flux e i f =500ma 360 - mw u395 peak wavelength p i f =500ma 395 - nm forward voltage v f i f =500ma 3.6 - v radiant flux e i f =500ma 350 - mw u385 peak wavelength p i f =500ma 385 - nm spectrum half width ? i f =500ma 9.0 - nm thermal resistance r js - 9.3 10.5 c/w * characteristics at t s =25c. * radiant flux value as per cie 127:2007 standard. * r js is thermal resistance from junction to t s measuring point. * it is recommended to operate the leds at a current greater than 10% of the sorting current to stabilize the led characterist ics.
nichia sts-da1-2578 2 ranks item rank min max unit forward voltage - 3.3 4.1 v p6 510 605 p5 430 510 p4 360 430 p3 300 360 p2 255 300 radiant flux p1 215 255 mw u405 400 410 u395 390 400 peak wavelength u385 380 390 nm * ranking at t s =25c. * forward voltage tolerance: 0.05v * radiant flux tolerance: 10% * peak wavelength tolerance: 3nm * leds from the above ranks will be shipped. the rank combination ratio per sh ipment will be decided by nichia. radiant flux ranks by peak wavelength ranking by radiant flux ranking by peak wavelength p1 p2 p3 p4 p5 p6 u405 u395 u385
nichia sts-da1-2578 3 outline dimensions sts-da7-3363 NCSU275 ? no. ( g unit: mm) this product complies with rohs directive. u? rohs ?m??? * ( g unit: mm, tolerance: 0.2) ka o protection device ? item ??`| package materials ??| encapsulating resin materials ?O| electrodes materials | weight description ?? ceramics ?`? silicone resin ? au-plated 0.037g(typ) 0.875 0.275 3.2 0.8 1 anode cathode 3.5 3.5 (2.8) (2.8) cathode mark
nichia sts-da1-2578 4 soldering ? recommended reflow soldering condition(lead-free solder) recommended soldering pad pattern ( g unit: mm) 4.1 0.5 3.5 * this led is designed to be reflow soldered on to a pcb. if dip soldered or hand soldered, nichia cannot guarantee its reliability. * reflow soldering must not be performed more than twice. * avoid rapid cooling. ramp down the temper ature gradually from th e peak temperature. * nitrogen reflow soldering is re commended. air flow soldering condit ions can cause optical degradation, caused by heat and/or atmosphere. * since the silicone used in the encapsulating resin is soft, do not press on the encapsulant resin. pressure can cause nicks, chip-outs, encapsulant delamina tion and deformation, and wire breaks, decreasing reliability. * repairing should not be done after the leds have been soldered. it should be confirmed beforehand whether the characteri stics of the leds will or will not be damaged by repairing. * when soldering, do not apply stre ss to the led while the led is hot. 120sec max pre-heat 180 to 200c 260c max 10sec max 60sec max above 220c 1 to 5c per sec
nichia sts-da1-2578 5 packaging - bulk ? label nichia led sts-da7-1108b nxxxxxxx anti-static ic pack bag ic ?? ?` seal rohs nxxxxxxx uv led ******* nichia corporation 491 oka, kaminaka, anan, tokushima, japan type lot qty. ymxxxx-rrr pcs ? warning and explanatory labels led radiation avoid exposure to beam clas s 3b led produc t le d ?`???? ? 3b l e d u? uv led led radiation led ?`???? ? 3b led u? class 3b led product avoid exposure to beam ? desiccants ??K??g?????? moisture-proof bags are packed in cardboard boxes with shock absorbing materi als to fill empty spaces. moisture-proof bag ?? ? no. ??? ic ????????`???? anti-static ic packs are shipped with desiccants in heat-sealed moisture-proof bags. * u? ic ?????n?go??`y? ??\H?y?B???y? * ?`???????y?????? * ?QH??n?????u?p?????? * products shipped in anti-static ic packs are packed in a moisture-proof bag. they are shipped in cardboard boxes to protect th em from external forces during transportation. do not drop or expose the box to external forces as it may damage the products. do not expose to water. the box is not water-resistant. using the original package material or equivalent in transit is recommended. ? label rohs nxxxxxxx uv led ******* rrr pcs type rank qty. nichia corporation 491 oka, kaminaka, anan, tokushima, japan ? for details, see "lot numbering code" in this document. * ??????????? if not provided, it will not be indicated on the label. ******* is the customer part number. O??????? * ******* ??
nichia sts-da1-2578 6 tape and reel dimensions nxxx275x sts-da7-3314 1 `?? 2000 ? * the tape packing method complies with jis c 0806 (packaging of electronic comp onents on continuous tapes). * jis c 0806 ???`??????? ( g unit: mm) ? no. `? reel 15.4 1 60 +1 -0 -0 180 +0 -3 2 1 0 . 8 1 3 0 . 2 ? label 13 +1 1.75 0.1 8 0.1 2 0.05 4 0.1 5.5 0.05 1.5 +0.1 -0 12 +0.3 ?`??? tape -0.1 ?` / ` trailer and leader ???`?` embossed carrier tape ???` top cover tape feed direction ` 400mm leader without top cover tape 400mm min ?` 160mm ? trailer 160mm min(empty pockets) led ?? loaded pockets 100mm ? leader with top cover tape 100mm min(empty pocket) reel size: 2000pcs 3.85 0.1 3.85 0.1 0.2 0.05 1 0.1 cathode mark 1.5 +0.2 -0
nichia sts-da1-2578 7 packaging - tape & reel ?`???????y?????? * ??\H?y?B???y? * ?QH??n?????u?p?????? * using the original package material or equivalent in transit is recommended. do not expose to water. the box is not water-resistant. do not drop or expose the box to extern al forces as it may damage the products. products shipped on tape and reel are packed in a moisture-proof bag. they are shipped in cardboard boxes to protect them from external forces during transportation. * u???`?????n?go??`y? nichia led sts-da7-1109b nxxxxxxx moisture-proof bag ?? ?` seal reel ` ? label ? label rohs nxxxxxxx uv led ******* nichia corporation 491 oka, kaminaka, anan, tokushima, japan type lot qty. ymxxxx-rrr pcs rohs nxxxxxxx uv led ******* rrr pcs type rank qty. nichia corporation 491 oka, kaminaka, anan, tokushima, japan ? warning and explanatory labels led radiation avoid exposure to beam clas s 3b led produc t le d ?`???? ? 3b l e d u? uv led led radiation led ?`???? ? 3b led u? class 3b led product avoid exposure to beam reels are shipped with desiccants in heat-seale d moisture-proof bags. ????`??????`???? ? no. desiccants ? moisture-proof bags are packed in cardboard boxes with corrugated partitions. ??K???`? if not provided, it will not be indicated on the label. ******* is the customer part number. O??????? * ******* ?? ? for details, see "lot numbering code" in this document. * ???????????
nichia sts-da1-2578 8 lot numbering code lot number is presented by using the following alphanumeric code. ymxxxx - rrr y - year year y 2009 9 2010 a 2011 b 2012 c 2013 d 2014 e m - month month m month m 1 1 7 7 2 2 8 8 3 3 9 9 4 4 10 a 5 5 11 b 6 6 12 c xxxx-nichia's product number rrr-ranking by wavelength, ranking by radiant flux
nichia sts-da1-2578 9 derating characteristics NCSU275 sts-da7-3364 ? no. derating1 0 20 0 40 0 60 0 80 0 1000 0 20406080100120 (29, 700) (85, 310) derating2 0 200 400 600 800 1000 0 20406080100120 (85, 700) duty 100 1000 10000 1 10 100 70 0 S allowable forward current ( ma ) `??????-S solder te mpe rature(c athode side) vs allowable forward current ??-S ambient tempe rature vs allowable forward current S allowable forward current(ma) S allo wable forward current(ma) `?????? solder temperature(cathode side)(c) ?? ambient temperature(c) ?` ?` duty ratio(%) ?`?`-S duty ratio vs allowable forward current t a =25c 37c/w ja r =
nichia sts-da1-2578 10 optical characteristics NCSU275 ? no. sts-da7-3365 spectrum 0.0 0.2 0.4 0.6 0.8 1.0 300 350 400 450 5 00 550 6 00 ? relative radiant directivity1 90 80 70 60 50 40 30 20 10 0 -10 -20 -30 -40 -50 -60 -70 -8 0 -90 k??? spectrum k? relative emission intensity(a.u.) L wavelength(nm) ? directivity ? radiation angle 10.500.5 1 * ??? all characteristics shown are for reference only and are not guaranteed. 50 0ma i fp = t a =25c 50 0ma i fp = t a =25c * ???`L u38 5 ???? the graphs above show the characteristics for u385 leds of this product.
nichia sts-da1-2578 11 optical characteristics NCSU275 ? no. sts-da7-3457 spectrum 0.0 0.2 0.4 0.6 0.8 1.0 300 350 400 450 5 00 550 6 00 ? relative radiant directivity1 90 80 70 60 50 40 30 20 10 0 -10 -20 -30 -40 -50 -60 -70 -8 0 -90 k??? spectrum k? relative emission intensity(a.u.) L wavelength(nm) ? directivity ? radiation angle 10.500.5 1 * ??? all characteristics shown are for reference only and are not guaranteed. 50 0ma i fp = t a =25c 50 0ma i fp = t a =25c * ???`L u39 5 ???? the graphs above show the characteristics for u395 leds of this product.
nichia sts-da1-2578 12 optical characteristics NCSU275 ? no. sts-da7-3458 spectrum 0.0 0.2 0.4 0.6 0.8 1.0 300 350 400 45 0 50 0 550 6 00 ? relative radiant directivity1 90 80 70 60 50 40 30 20 10 0 -10 -2 0 -30 -40 -50 -60 -70 -80 -90 k??? spectrum k? relative emission intensity(a.u.) L wavelength(nm) ? directivity ? radiation angle 10.500.5 1 * ??? all characteristics shown are for reference only and are not guaranteed. 50 0ma i fp = t a =25c 50 0ma i fp = t a =25c * ???`L u40 5 ???? the graphs above show the characteristics for u405 leds of this product.
nichia sts-da1-2578 13 forward current characteristics / temperature characteristics NCSU275 sts-da7-3366 ? no. tavf 2.5 3.0 3.5 4.0 4.5 -60 -40 -20 0 20 40 6 0 80 100 1 20 ta iv 0.6 0.8 1.0 1.2 1.4 -60 -40 -2 0 0 20 40 60 8 0 100 120 vfif 10 100 10 00 2.5 3.0 3.5 4 .0 4 .5 500 relative radiant flux(a.u.) ??- ambient temperature vs relative radiant flux for ward curren t( m a) ifiv 0.0 0.5 1.0 1.5 2.0 2.5 0 200 400 600 800 1000 1 200 relative radiant flux(a.u.) - forward current vs relative radiant flu x forw ard current(ma) ?R- forward voltage vs forward current ??-?R ambient temperature vs forward voltage ?R forward volta g e(v) ?R forward voltage(v) ?? ambient tem p erature ( c ) ?? ambient temperature(c) t a =25c * ??? all characteristics shown are for reference only and are not guaranteed. t a =25c i fp = 500ma i fp = 500ma * ???`L u3 85 ???? the graphs above show the characteristics for u385 leds of this product.
nichia sts-da1-2578 14 forward current characteristics / temperature characteristics NCSU275 sts-da7-3461 ? no. tavf 2.5 3.0 3.5 4.0 4.5 -60 -40 -20 0 20 40 6 0 80 100 1 20 ta iv 0.6 0.8 1.0 1.2 1.4 -60 -40 -2 0 0 20 40 60 8 0 100 120 vfif 10 100 10 00 2.5 3.0 3.5 4 .0 4 .5 500 relative radiant flux(a.u.) ??- ambient temperature vs relative radiant flux for ward curren t( m a) ifiv 0.0 0.5 1.0 1.5 2.0 2.5 0 200 400 600 800 1000 1 200 relative radiant flux(a.u.) - forward current vs relative radiant flu x forw ard current(ma) ?R- forward voltage vs forward current ??-?R ambient temperature vs forward voltage ?R forward volta g e(v) ?R forward voltage(v) ?? ambient tem p erature ( c ) ?? ambient temperature(c) t a =25c * ??? all characteristics shown are for reference only and are not guaranteed. t a =25c i fp = 500ma i fp = 500ma * ???`L u3 95 ???? the graphs above show the characteristics for u395 leds of this product.
nichia sts-da1-2578 15 forward current characteristics / temperature characteristics NCSU275 sts-da7-3462 ? no. tavf 2.5 3.0 3.5 4.0 4.5 -60 -40 -20 0 20 40 6 0 80 100 1 20 ta iv 0.6 0.8 1.0 1.2 1.4 -60 -40 -2 0 0 20 40 60 8 0 100 120 vfif 10 100 10 00 2.5 3.0 3.5 4 .0 4 .5 500 relative radiant flux(a.u.) ??- ambient temperature vs relative radiant flux for ward curren t( m a) ifiv 0.0 0.5 1.0 1.5 2.0 2.5 0 200 400 600 800 1000 1 200 relative radiant flux(a.u.) - forward current vs relative radiant flu x forw ard current(ma) ?R- forward voltage vs forward current ??-?R ambient temperature vs forward voltage ?R forward volta g e(v) ?R forward voltage(v) ?? ambient tem p erature ( c ) ?? ambient temperature(c) t a =25c * ??? all characteristics shown are for reference only and are not guaranteed. t a =25c i fp = 500ma i fp = 500ma * ???`L u4 05 ???? the graphs above show the characteristics for u405 leds of this product.
nichia sts-da1-2578 16 forward current characteristics / temperature characteristics ? no. NCSU275 sts-da7-3367 if d 379 381 383 385 387 389 391 10 100 1000 ta d 379 381 383 385 387 389 391 -6 0 -40 -2 0 0 20 4 0 60 8 0 100 120 500ma i fp = -?`L forward current vs peak wavelength for ward current(ma) ??-?`L ambie nt te mperature vs peak wavelength peak wavelength(nm) ?` L peak wavelength(nm) ?` L ?? ambient temperature(c) * ??? all characteristics shown are for reference only and are not guaranteed. t a =25c * ???`L u3 85 ???? the graphs above show the characteristics for u385 leds of this product.
nichia sts-da1-2578 17 forward current characteristics / temperature characteristics ? no. NCSU275 sts-da7-3459 if d 38 9 39 1 39 3 39 5 39 7 39 9 40 1 10 100 1000 ta d 38 9 39 1 39 3 39 5 39 7 39 9 40 1 -60 -40 -2 0 0 20 4 0 60 80 100 120 500ma i fp = -?`L forward current vs peak wavelength for ward current(ma) ??-?`L ambie nt te mperature vs peak wavelength peak wavelength(nm) ?` L peak wavelength(nm) ?` L ?? ambient temperature(c) * ??? all characteristics shown are for reference only and are not guaranteed. t a =25c * ???`L u3 95 ???? the graphs above show the characteristics for u395 leds of this product.
nichia sts-da1-2578 18 forward current characteristics / temperature characteristics ? no. NCSU275 sts-da7-3460 if d 39 9 40 1 40 3 40 5 40 7 40 9 41 1 10 100 1000 ta d 39 9 40 1 40 3 40 5 40 7 40 9 41 1 -60 -40 -2 0 0 20 4 0 60 80 100 120 500ma i fp = -?`L forward current vs peak wavelength for ward current(ma) ??-?`L ambie nt te mperature vs peak wavelength peak wavelength(nm) ?` L peak wavelength(nm) ?` L ?? ambient temperature(c) * ??? all characteristics shown are for reference only and are not guaranteed. t a =25c * ???`L u4 05 ???? the graphs above show the characteristics for u405 leds of this product.
nichia sts-da1-2578 19 reliability (1) tests and results te s t reference standard test conditions te s t duration failure criteria # units failed/tested resistance to soldering heat (reflow soldering) t sld =260c, 10sec, 2reflows #1 0/10 temperature cycle jeita ed-4701 100 105 -40c(30min)~25c(5min)~ 100c(30min)~25c(5min) 100cycles #1 0/10 high temperature storage jeita ed-4701 200 201 t a =100c 1000hours #1 0/10 low temperature storage jeita ed-4701 200 202 t a =-40c 1000hours #1 0/10 room temperature operating life condition 1 t a =25c, i f =500ma 1000hours #1 0/10 room temperature operating life condition 2 t a =25c, i f =700ma 500hours #1 0/10 high temperature operating life t a =85c, i f =300ma 500hours #1 0/10 temperature humidity operating life 60c, rh=90%, i f =300ma 500hours #1 0/10 low temperature operating life t a =-10c, i f =500ma 1000hours #1 0/10 vibration jeita ed-4701 400 403 200m/s 2 , 100~2000~100hz, 4cycles, 4min, each x, y, z 48minutes #1 0/10 electrostatic discharges jeita ed-4701 300 304 hbm, 2kv, 1.5k ? , 100pf, 3pulses, alternately positi ve or negative #1 0/10 notes: 1) r ja 37c/w 2) measurements are performed after allo wing the leds to return to room temperature. (2) failure criteria criteria # items conditions failure criteria forward voltage(v f ) i f =500ma >initial value1.1 #1 radiant flux( e ) i f =500ma nichia sts-da1-2578 20 cautions (1) storage conditions te m p e ra t u r e humidity time before opening aluminum bag 30c 90%rh within 1 year from delivery date storage after opening aluminum bag 30c 70%rh 168hours baking 655c - 24hours product complies with jedec msl 3 or equivalent. se e ipc/jedec std-020 for moisture-sensitivity details. absorbed moisture in led packages can vaporize and expand during soldering, which can cause interface delamination and result in optical performance degradation. products are packed in moisture-proof aluminum bags to minimize moisture absorptio n during transportation and storage. included silica gel desiccants change from blue to red if moisture had penetrated bags. after opening the moisture-proof aluminum bag, the products should go through the soldering process within the range of the conditions stated above. unused remaining leds should be stored with silica gel desiccants in a hermetically sealed container, prefer ably the original moisture -proof bags for storage. after the ?period after opening? stor age time has been exceeded or silica gel desiccants are no longer blue, the products should be baked. baking should only be done once. although the leads or electrode pads (anode and cathode) of the product are plated with gold, prolonged exposure to a corrosive en vironment might cause the gold plated th e leads or electrode pads to tarnish, and thus leading to difficulties in sold ering. if unused leds remain, they must be stored in a hermetically sealed container . nichia recommends using the or iginal moisture-proof bag for storage. do not use sulfur-containing materials in commercial products. some materials, such as seals and adhesives, may contain sulfur . the contaminated plating of leds might cause an open circ uit. silicone rubber is recommen ded as a material for seals. bear in mind, the use of silicones may lead to silicone contamination of electrical contacts inside the products, caused by low molecular weight volatile siloxane. to prevent water condensation, please avoid large temperat ure and humidity fluctuations for the storage conditions. (2) directions for use when designing a circuit, the current through each led must not exceed the absolute maximum rating. operating at a constant current per led is recommended. in case of operating at a constant voltage, circuit b is recommended . if the leds are operated with constant voltage using circui t a, the current through the leds may vary due to the variation in forward voltage ch aracteristics of the leds. (a) ... (b) ... leds should be operated in forward bias. driving circuits must not subject leds to either forward or reverse voltage while off . continuous reverse voltage can cause migration and led damage. it is recommended to operate the leds at a current greater th an 10% of the sorting current to stabilize the led characteristic s. for outdoor use, necessary measures should be taken to prevent water, moisture and salt air damage. this led also emits visible light. please take notice of visible light spectrum, in case you use this led as light source of sensors etc.
nichia sts-da1-2578 21 (3) handling precautions do not handle leds with bare hands, it may contaminate the led surface and affect optical characteristics. in the worst case, catastrophic failure from excess pres sure through wire-bond breaks and package damage may result. this product uses encapsulating resin that is very soft. direct contact with the surface of the resin may cause damage to the resin; the application of force on the resin may cause the wire to break and/or cause the led not to illuminate. when handling the leds with tweezers, make sure to avoid direct contact with the resin and that excessive force is not applied to the leds. dropping the produc t may cause damage. do not stack assembled pcbs together. fa ilure to comply can cause the resin portio n of the product to be cut, chipped, delaminated and/or deformed. it may cause wire to break, leading to catastrophic failures. (4) design consideration pcb warpage after mounting the products on to a pcb can cause the package to break. the led should be placed in a way to minimize the stress on the leds due to pcb bow and twist. the position and orientation of the leds affect how much mechan ical stress is exerted on the leds placed near the score lines. the led should be placed in a way to minimize the stress on the leds due to board flexing. board separation must be performed using special jigs, not using hands. if an aluminum pcb is used, customer is advised to verity the pcb with the products before use. thermal stress during use can cause the solder joints to crack. part of the surface of the encapsulating resi n may appear frosted or cloudy during use. this is the area where the material properties have changed due to the ultra-violet light. the appearance of the cloudy spots will not cause an ad verse effect on the electrical/optical characteristics. however, ensure that there are no issu es for the chosen application prior to use. when substances commonly found in ink adhere to the resin of this prod uct, it may reduce the radiant flux and may change the material properties. materials, such as dustproof glass, should be used to protect the leds. (5) electrostatic discharge (esd) the products are sensitive to static electricity or surge voltage. esd can damage a die and its reliability. when handling the products, the following measures against electrostatic discharge are strongly recommended: eliminating the charge grounded wrist strap, esd footwear, clothes, and floors grounded workstation equipment and tools esd table/shelf mat made of conductive materials proper grounding is required for all devices, equipment, and machinery used in product assembly. surge protection should be considered when design ing of commercial products. if tools or equipment contain insulating materials such as glass or plastic, the following measures against electros tatic discharge are strongly recommended: dissipating static charge with conductive materials preventing charge generation with moisture neutralizing the charge with ionizers the customer is advised to chec k if the leds are damaged by esd when performing the characteristics inspection of the leds in the application. damage can be detected with a forw ard voltage measurement at low current ( 1ma). esd damaged leds may have current flow at a low voltage. failure criteria: v f <2.0v at i f =0.5ma
nichia sts-da1-2578 22 (6) thermal management proper thermal management is an impo rtant when designing produc ts with leds. led die temperature is affected by pcb thermal resistance and led spacing on the board. please design products in a way that the led die temperature does not exceed the maximum junction temperature (t j ). drive current should be determined for the surrounding ambient temperature (t a ) to dissipate the heat from the product. the following equations can be used to calculate the junction temperature of the products. 1) t j =t a +r ja ? w 2) t j =t s +r js ? w *t j =led junction temperature: c t a =ambient temperature: c t s =soldering temperature (cathode side): c r ja =thermal resistance from junction to ambient: c/w r js =thermal resistance from junction to t s measuring point: c/w w=input power(i f v f ): w ts point (7) cleaning if required, isopropyl alcohol (ipa) should be used. ot her solvents may cause premature failure to the leds due to the damage to the resin portion. the effects of such solvents should be verified prior to use. in addition, the use of cfcs such as freon is heavily regulated. ultrasonic cleaning is not recommended since it may have adverse effects on the leds depending on the ultrasonic power and how led is assembled. if ultrasonic cleaning must be used, the customer is advised to make sure the leds will not be damaged prior to cleaning. (8) eye safety in 2006, the international electrical commission (iec ) published iec 62471:2006 photobiological safety of lamps and lamp systems, which added leds in its scope. on the other hand, the iec 60825-1:2007 laser safety standard removed leds from its scope. however, please be advised that some countries and regions ha ve adopted standards based on the iec laser safety standard iec 60825-1: 20112001, which still includes leds in its scope. most of nichia's leds can be classified as belo nging into either the exempt group or risk group 1. high-power leds, that emit ligh t containing blue wavelengths, may be classified as risk group 2. please proceed with caution when viewing directly any leds driven at high current, or viewing leds with optical instruments which may greatly increase the damages to your eyes. viewing a flashing light may cause eye discomfort. when incorporating the led into your product, please be careful to avoid adverse effects on the human body caused by light stimulation. the products are uv light leds, and radiate intense uv light during operation. since uv light can be harmful to eyes, do not look directly into the uv light, even through an optical instrument. in case of the light reflection, uv protective glasses ar e required to use in order to avoid damage by the light.
nichia sts-da1-2578 23 (9) others the leds described in this brochure are intended to be used for ordinary electronic equipmen t (such as office equipment, communications equipment, measurement instruments and household appliances). consult nichia's sales staff in advance for information on the applicat ions in which exceptional quality and reliability are required, particularly when the failure or malfunction of the leds may directly jeopardize life or health (such as for airplanes, aerospace, submersibl e repeaters, nuc lear reactor control system, automobiles, traffic control equipment, life support systems and safety devices). the customer shall not reverse engineer by disassembling or analysis of the leds without having prior written consent from nichia. when defective leds are found, the customer shall inform nichia directly before disassembling or analysis. both the customers and nichia will agree on official specificatio ns of supplied produc ts before a customer 's volume production . specifications and appearance subject to change for improvement without notice.
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