110 p&b dimensions are shown for reference purposes only. dimensions are in inches over (millimeters) unless otherwise specified. catalog 1308242 issued 3-03 (pdf rev. 4-04) specifications and availability subject to change. www.tycoelectronics.com technical support: refer to inside back cover. W28 series switchable or push to reset fuseholder-type thermal circuit breaker note: vde, demko, semko not available on 16a and 20a W28 only. time vs. current trip curve @ +25? ambient compensation chart (a) (b) (a) all 3-20 amp models (b) all 0.25-2 amp models overload trip times 100% 135% 200% 400% 600% 800% 1000% no trip trip in 1 hour 2.2-15.0 sec. 0.55-1.8 sec. 0.27-0.7 sec. 0.17-0.45 sec. 0.12-0.3 sec. overload trip times 100% 175% 200% 400% 600% no trip trip in 1 hour 4.5-28.0 sec. 1.0-6.5 sec. 0.4-4.0 sec. 1000 900 800 700 600 500 400 300 200 100 0 .1 1 10 100 1000 load current as a percent of breaker rating time in seconds 175 135 20 100 102030405060 1.40 1.30 1.20 1.10 1.00 0.90 0.80 0.70 0.60 correction factor ambient temperature in degrees centigrade ( c) to use this chart: read up from the ambient temperature to the curve, and across to find a correction factor. multiply the breaker rating by the correction factor to determine the compensated rating. calculate the overloads in terms of the compensated rating to use the published trip curve. do not use these devices outside their specified operating temperature ranges. features ?switchable version combines on-off switch and circuit protection in a single unit. ?approved to many international standards (push to reset type). ?replaces slow blow glass cartridge fuse. ?labor-saving snap-in mounting. ?button extends for visual trip indication on push to reset model. ?rocker on switchable model moves to overload?position upon trip. electrical data @ 25 c calibration: will continuously carry 100% of rating. 3-20 amp models ?may trip between 101% and 134%, but must trip at 135% of rating within one hour at +25?. 0.25-2 amp models ?may trip between 101% and 174%, but must trip at 175% of rating within one hour at +25?. dielectric strength: over 1,500 volts rms. maximum operating voltages: 32vdc; 250vac, 50/60 hz. interrupt capacity: 1,000 amps at 250vac, 50/60 hz. and 32vdc in accordance with ul standard 1077. mechanical/environmental data endurance cycling(switchable type): typically 30,000 operations at 100% of rating. termination: .250?(6.35mm) quick connects. soldering to terminals is not recommended. mounting: snaps into panel from front. see recommended panel cutouts. approximate weight: 0.35 oz. (10g). resettable overload capacity: six times rated current for 0.25 through 2 amp models. ten times rated current for 3 through 20 amp models. reset time: 180 seconds max. for 0.25 through 2 amp models. 10 to 60 seconds for 3 through 20 amp models. push-to-reset breaker s w it c h/b r ea k er current typical current typical rating resistance rating resistance in amps in ohms in amps in ohms 0.25 14.0 8.0 0.016 0.50 3.55 9.0 0.014 0.75 2.0 10.0 0.011 1.0 0.89 11.0 0.01 2.0 0.17 12.0 0.009 3.0 0.069 13.0 0.009 4.0 0.043 14.0 0.007 5.0 0.030 15.0 0.007 6.0 0.026 16.0 0.007 7.0 0.017 20.0 0.006 agency approvals W28 series is ul 1077 recognized as supplementary protectors, file e69543, and csa certified as appliance component protectors, file lr15734. W28 breakers have been issued certificate of suitability cs2190n as supplementary equipment protectors by the energy authority of new south wales, australia. W28 breakers are also demko (denmark) and sev (switzerland) approved. vde approved for use in office equipment and provides 8mm isolation. 16 amp and 20 amp models do not have vde, demko and sev approvals at present. W28-s is ul 1077 recognized, and csa certified for models up to and including 15 amps. users should thoroughly review the technical data before selecting a product part number. it is recommended that users also seek out the pertinent approvals files of the agencies/laboratories and review them to ensure the product meets the requirements for a given application. typical resistance vs. current rating @ +25 c ( c on s ul t factory for availability) www.datasheet.co.kr datasheet pdf - http://www..net/
111 p&b dimensions are shown for reference purposes only. dimensions are in inches over (millimeters) unless otherwise specified. catalog 1308242 issued 3-03 (pdf rev. 4-04) specifications and availability subject to change. www.tycoelectronics.com technical support: refer to inside back cover. W28-xq1a-0.25 W28-xq1a-0.50 W28-xq1a-0.75 W28-xq1a-1 W28-xq1a-2 W28-xq1a-3 W28-xq1a-4 W28-xq1a-5 W28-xq1a-6 W28-xq1a-7 W28-xq1a-8 W28-xq1a-10 W28-xq1a-12 W28-xq1a-15 W28-xq1a-20 W28-xt1a-10 W28-xt1a-12 outline dimensions .250 x .032 (6.35 x .813) quick connect terminals .625 max. (15.875) .37 (9.4) .325 max. (8.26) .54 max. (13.716) 1.535 max. (38.99) .19 (4.83) .76 max. (19.31) .76 max. (19.31) amp rating i o .625-.635 (15.875-16.129) .625-.635 (15.875-16.129) .625-.635 (15.875-16.129) .570-.575 (14.478-14.605) .540-.550 (13.716-13.970) recommended panel cutouts .970 dia. (25.64) 55-025b internal tooth push-on lockwasher for panels greater than .105 (2.67) thickness i o rocker position during overload (trip) condition amp rating push-to-reset type switchable type note: 1. soldering to terminals is not recommended. 2. recommended panel thickness: style q: .032 - .062 (.813 mm - 1.574 mm) style t: .075 - .105 (1.905 mm - 2.667 mm) 3. internal tooth push-on washer available for panel thickness not covered above. part no. 55-025b. stock items authorized distributors are more likely to stock the following items. ordering information typical part number b W28 -x q 1 a -5 1. designator: w = circuit breaker 2. series number: 28 = single pole fuseholder type 3. circuit function: x = series t rip, p ush-to- r eset bu t ton s = series t rip, s wit c hable r o c k er ( co nsu lt fac tor y for "s " a vai la bi lit y ) 4. terminal type and mounting: q = .250 (6.35mm) quick connect will mount in .032 -.062 (.813mm 1.574mm) thick panel. t = .250 (6.35mm) quick connect will mount in .075 -.105 (1.905mm 2.667mm) thick panel. for panel thicknesses other than above, order q type and 55-025b internal tooth push-on lockwasher. 5. bezel color: 1 = black with white rate marking ? 11 = black with no rate marking 2 = red with black rate marking ? 21 = red with no rate marking ? not available with circuit function s . b = black with white reset marked on bezel (no rate marking) ? consult factory for other bezel colors. 6. button color: a = black b = red consult factory for other button colors. 7. amp rating: 0.25 ? 1 ? 4 7 10 13 16 0.50 ? 2 ? 5 8 11 14 20* ? not available with circuit function s . 0.75 ? 3 6 9 12 15 * contact factory for availability. www.datasheet.co.kr datasheet pdf - http://www..net/
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