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 MMFT3055V Power MOSFET 1 Amp, 60 Volts
N-Channel SOT-223
These Power MOSFETs are designed for low voltage, high speed switching applications in power supplies, converters and power motor controls, these devices are particularly well suited for bridge circuits where diode speed and commutating safe operating areas are critical and offer additional safety margin against unexpected voltage transients. * Avalanche Energy Specified * IDSS and VDS(on) Specified at Elevated Temperature
MAXIMUM RATINGS (TC = 25C unless otherwise noted)
Rating Drain-to-Source Voltage Drain-to-Gate Voltage (RGS = 1.0 M) Gate-to-Source Voltage - Continuous - Non-repetitive (tp 10 ms) Drain Current - Continuous Drain Current - Continuous @ 100C Drain Current - Single Pulse (tp 10 s) Total PD @ TA = 25C mounted on 1 sq. Drain pad on FR-4 bd material Total PD @ TA = 25C mounted on 0.70 sq. Drain pad on FR-4 bd material Total PD @ TA = 25C mounted on min. Drain pad on FR-4 bd material Derate above 25C Operating and Storage Temperature Range Single Pulse Drain-to-Source Avalanche Energy - Starting TJ = 25C (VDD = 25 Vdc, VGS = 10 Vdc, Peak IL = 3.4 Apk, L = 10 mH, RG = 25 ) Thermal Resistance - Junction to Ambient on 1 sq. Drain pad on FR-4 bd material - Junction to Ambient on 0.70 sq. Drain pad on FR-4 bd material - Junction to Ambient on min. Drain pad on FR-4 bd material Maximum Lead Temperature for Soldering Purposes, 1/8 from case for 10 seconds Symbol VDSS VDGR VGS VGSM ID ID IDM PD Value 60 60 20 25 1.7 1.4 6.0 2.1 1.7 0.94 6.3 TJ, Tstg EAS 58 C/W RJA RJA RJA TL 70 88 159
1 2 3 1
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1 AMPERE 60 VOLTS RDS(on) = 130 mW
N-Channel D
Unit Vdc Vdc Vdc Vpk Adc Apk Watts
4
G S
MARKING DIAGRAM
2 3
TO-261AA CASE 318E STYLE 3
TBD LWW
mW/C C mJ
-55 to 175
L WW
= Location Code = Work Week
PIN ASSIGNMENT
4 Drain
260
C
Gate
Drain
Source
ORDERING INFORMATION
Device MMFT3055VT1 MMFT3055VT3 Package SOT-223 SOT-223 Shipping 1000 Tape & Reel 4000 Tape & Reel
(c) Semiconductor Components Industries, LLC, 2000
1
November, 2000 - Rev. 2
Publication Order Number: MMFT3055V/D
MMFT3055V
ELECTRICAL CHARACTERISTICS (TJ = 25C unless otherwise noted)
Characteristic OFF CHARACTERISTICS Drain-to-Source Breakdown Voltage (VGS = 0 Vdc, ID = 0.25 mAdc) Temperature Coefficient (Positive) Zero Gate Voltage Drain Current (VDS = 60 Vdc, VGS = 0 Vdc) (VDS = 60 Vdc, VGS = 0 Vdc, TJ = 150C) Gate-Body Leakage Current (VGS = 20 Vdc, VDS = 0 Vdc) ON CHARACTERISTICS (Note 1.) Gate Threshold Voltage (VDS = VGS, ID = 250 Adc) Threshold Temperature Coefficient (Negative) Static Drain-to-Source On-Resistance (VGS = 10 Vdc, ID = 0.85 Adc) Drain-to-Source On-Voltage (VGS = 10 Vdc, ID = 1.7 Adc) (VGS = 10 Vdc, ID = 0.85 Adc, TJ = 150C) Forward Transconductance (VDS = 8.0 Vdc, ID = 1.7 Adc) DYNAMIC CHARACTERISTICS Input Capacitance Output Capacitance Transfer Capacitance SWITCHING CHARACTERISTICS (Note 2.) Turn-On Delay Time Rise Time Turn-Off Delay Time Fall Time Gate Charge (VDS = 48 Vdc, ID = 1.7 Adc, VGS = 10 Vdc) (VDD = 30 Vdc, ID = 1.7 Adc, VGS = 10 Vdc, Vdc RG = 9.1 ) td(on) tr td(off) tf QT Q1 Q2 Q3 SOURCE-DRAIN DIODE CHARACTERISTICS Forward On-Voltage (Note 1.) (IS = 1.7 Adc, VGS = 0 Vdc) (IS = 1.7 Adc, VGS = 0 Vdc, TJ = 150C) VSD - - trr (IS = 1.7 Adc, VGS = 0 Vdc, 1 7 Adc Vdc dIS/dt = 100 A/s) Reverse Recovery Stored Charge INTERNAL PACKAGE INDUCTANCE Internal Drain Inductance (Measured from the drain lead 0.25 from package to center of die) Internal Source Inductance (Measured from the source lead 0.25 from package to source bond pad) 1. Pulse Test: Pulse Width 300 s, Duty Cycle 2%. 2. Switching characteristics are independent of operating junction temperature. 3. Reflects typical values. Max limit - Typ Cpk = 3 x SIGMA LD - LS - 7.5 - 4.5 - nH nH ta tb QRR - - - - 0.85 0.7 40 34 6.0 0.089 1.6 - - - - - C ns Vdc - - - - - - - - 8.0 9.0 32 18 13 2.0 5.0 4.0 20 20 60 40 20 - - - nC ns (VDS = 25 Vd VGS = 0 Vdc, Vdc, Vd f = 1.0 MHz) Ciss Coss Crss - - - 360 110 25 500 150 50 pF (Cpk 2.0) (Note 3.) VGS(th) 2.0 - (Cpk 2.0) (Note 3.) RDS(on) - VDS(on) - - gFS 1.0 - - 2.7 0.27 0.25 - mhos 0.115 0.13 Vdc 2.8 5.6 4.0 - Vdc mV/C Ohm (Cpk 2.0) (Note 3.) V(BR)DSS 60 - IDSS - - IGSS - - - - 10 100 100 nAdc - 63 - - Vdc mV/C Adc Symbol Min Typ Max Unit
Reverse Recovery Time
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TYPICAL ELECTRICAL CHARACTERISTICS
4 I D , DRAIN CURRENT (AMPS) 3.5 3 2.5 2 1.5 1 0.5 0 0 1 2 3 4 5 6 7 8 4V 3.5 V 9 10 VDS, DRAIN-TO-SOURCE VOLTAGE (VOLTS) 4.5 V 4 3.5 I D , DRAIN CURRENT (AMPS) 3 2.5 2 1.5 1 0.5 0 2 2.5 100C 25C TJ = - 55C 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5
VGS = 10 V 7V 6V 5.5 V
TJ = 25C 5V
VDS 10 V
VGS, GATE-TO-SOURCE VOLTAGE (VOLTS)
Figure 1. On-Region Characteristics
R DS(on) , DRAIN-TO-SOURCE RESISTANCE (OHMS) R DS(on) , DRAIN-TO-SOURCE RESISTANCE (OHMS)
Figure 2. Transfer Characteristics
0.25 0.2 TJ = 100C 25C - 55C 0.15 0.1 0.05 0
0.225
VGS = 10 V
0.170 0.155 TJ = 25C
0.175 0.125 0.075 0.025 0 0.5 1
0.140 0.125 0.110 VGS = 10 V 15 V
0.095 0.080
0.065 0.050 0 0.5 1 1.5 3 2 2.5 ID, DRAIN CURRENT (AMPS) 3.5 4
1.5 3 2.5 2 ID, DRAIN CURRENT (AMPS)
3.5
4
Figure 3. On-Resistance versus Drain Current and Temperature
2.0 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 - 50 - 25 0 25 50 75 100 125 TJ, JUNCTION TEMPERATURE (C) 150 175 10 0 1000
Figure 4. On-Resistance versus Drain Current and Gate Voltage
RDS(on) , DRAIN-TO-SOURCE RESISTANCE (NORMALIZED)
VGS = 10 V ID = 0.85 A I DSS , LEAKAGE (nA)
VGS = 0 V TJ = 125C
100
100C
5
10 15 20 25 30 35 40 45 50 VDS, DRAIN-TO-SOURCE VOLTAGE (VOLTS)
55
60
Figure 5. On-Resistance Variation with Temperature http://onsemi.com
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Figure 6. Drain-To-Source Leakage Current versus Voltage
MMFT3055V
POWER MOSFET SWITCHING Switching behavior is most easily modeled and predicted by recognizing that the power MOSFET is charge controlled. The lengths of various switching intervals (t) are determined by how fast the FET input capacitance can be charged by current from the generator. The published capacitance data is difficult to use for calculating rise and fall because drain-gate capacitance varies greatly with applied voltage. Accordingly, gate charge data is used. In most cases, a satisfactory estimate of average input current (IG(AV)) can be made from a rudimentary analysis of the drive circuit so that t = Q/IG(AV) During the rise and fall time interval when switching a resistive load, VGS remains virtually constant at a level known as the plateau voltage, VSGP. Therefore, rise and fall times may be approximated by the following: tr = Q2 x RG/(VGG - VGSP) tf = Q2 x RG/VGSP where VGG = the gate drive voltage, which varies from zero to VGG RG = the gate drive resistance and Q2 and VGSP are read from the gate charge curve. During the turn-on and turn-off delay times, gate current is not constant. The simplest calculation uses appropriate values from the capacitance curves in a standard equation for voltage change in an RC network. The equations are: td(on) = RG Ciss In [VGG/(VGG - VGSP)] td(off) = RG Ciss In (VGG/VGSP)
1100 1000 900 C, CAPACITANCE (pF) 800 700 C rss 600 500 400 300 200 100 0 10 5 VGS 0 VDS 5 Crss 10 15 20 25 Coss Ciss Ciss VDS = 0 V VGS = 0 V
The capacitance (Ciss) is read from the capacitance curve at a voltage corresponding to the off-state condition when calculating td(on) and is read at a voltage corresponding to the on-state when calculating td(off). At high switching speeds, parasitic circuit elements complicate the analysis. The inductance of the MOSFET source lead, inside the package and in the circuit wiring which is common to both the drain and gate current paths, produces a voltage at the source which reduces the gate drive current. The voltage is determined by Ldi/dt, but since di/dt is a function of drain current, the mathematical solution is complex. The MOSFET output capacitance also complicates the mathematics. And finally, MOSFETs have finite internal gate resistance which effectively adds to the resistance of the driving source, but the internal resistance is difficult to measure and, consequently, is not specified. The resistive switching time variation versus gate resistance (Figure 9) shows how typical switching performance is affected by the parasitic circuit elements. If the parasitics were not present, the slope of the curves would maintain a value of unity regardless of the switching speed. The circuit used to obtain the data is constructed to minimize common inductance in the drain and gate circuit loops and is believed readily achievable with board mounted components. Most power electronic loads are inductive; the data in the figure is taken with a resistive load, which approximates an optimally snubbed inductive load. Power MOSFETs may be safely operated into an inductive load; however, snubbing reduces switching losses.
TJ = 25C
GATE-TO-SOURCE OR DRAIN-TO-SOURCE VOLTAGE (VOLTS)
Figure 7. Capacitance Variation
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VGS, GATE-TO-SOURCE VOLTAGE (VOLTS) 10 9 8 7 6 5 4 3 2 1 0 0 Q3 2 4 6 8 10 VDS 12 QT, TOTAL CHARGE (nC) ID = 1.7 A TJ = 25C Q1 Q2 QT VGS 30 27 24 21 18 15 12 9 6 3 0 14 1000 VDD = 30 V ID = 1.7 A VGS = 10 V TJ = 25C VDS , DRAIN-TO-SOURCE VOLTAGE (VOLTS)
t, TIME (ns)
100
10
td(off) tf tr td(on)
1
1
10 RG, GATE RESISTANCE (OHMS)
100
Figure 8. Gate-To-Source and Drain-To-Source Voltage versus Total Charge
Figure 9. Resistive Switching Time Variation versus Gate Resistance
DRAIN-TO-SOURCE DIODE CHARACTERISTICS
2 1.8 I S , SOURCE CURRENT (AMPS) 1.6 1.4 1.2 1 0.8 0.6 0.4 0.2 0 0.5 0.55 0.6 0.65 0.7 0.75 0.8 0.85 0.9 VGS = 0 V TJ = 25C
VSD, SOURCE-TO-DRAIN VOLTAGE (VOLTS)
Figure 10. Diode Forward Voltage versus Current
SAFE OPERATING AREA The Forward Biased Safe Operating Area curves define the maximum simultaneous drain-to-source voltage and drain current that a transistor can handle safely when it is forward biased. Curves are based upon maximum peak junction temperature and a case temperature (TC) of 25C. Peak repetitive pulsed power limits are determined by using the thermal response data in conjunction with the procedures discussed in AN569, "Transient Thermal Resistance-General Data and Its Use." Switching between the off-state and the on-state may traverse any load line provided neither rated peak current (IDM) nor rated voltage (VDSS) is exceeded and the transition time (tr,tf) do not exceed 10 s. In addition the total power averaged over a complete switching cycle must not exceed (TJ(MAX) - TC)/(RJC). A Power MOSFET designated E-FET can be safely used in switching circuits with unclamped inductive loads. For reliable operation, the stored energy from circuit inductance dissipated in the transistor while in avalanche must be less than the rated limit and adjusted for operating conditions differing from those specified. Although industry practice is to rate in terms of energy, avalanche energy capability is not a constant. The energy rating decreases non-linearly with an increase of peak current in avalanche and peak junction temperature. Although many E-FETs can withstand the stress of drain-to-source avalanche at currents up to rated pulsed current (IDM), the energy rating is specified at rated continuous current (ID), in accordance with industry custom. The energy rating must be derated for temperature as shown in the accompanying graph (Figure 13). Maximum energy at currents below rated continuous ID can safely be assumed to equal the values indicated.
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MMFT3055V
SAFE OPERATING AREA
10 I D , DRAIN CURRENT (AMPS) 60 E , SINGLE PULSE DRAIN-TO-SOURCE AS AVALANCHE ENERGY (mJ) 10 ms 50 40 30 20 10 0 25 50 75 100 125 150 175 ID = 1.7 A
VGS = 20 V SINGLE PULSE TC = 25C
1 100 ms 0.1 500 ms 1s RDS(on) LIMIT THERMAL LIMIT PACKAGE LIMIT 0.1 1.0 dc 10 100
0.01
VDS, DRAIN-TO-SOURCE VOLTAGE (VOLTS)
TJ, STARTING JUNCTION TEMPERATURE (C)
Figure 11. Maximum Rated Forward Biased Safe Operating Area
Figure 12. Maximum Avalanche Energy versus Starting Junction Temperature
1 Rthja(t), EFFECTIVE TRANSIENT THERMAL RESISTANCE
D = 0.5 0.2 0.1 0.05 0.02 0.01
0.1
0.01
0.001 SINGLE PULSE 1.0E-04 1.0E-03 1.0E-02 1.0E-01 t, TIME (s) 1.0E+00 1.0E+01 1.0E+02 1.0E+03
0.0001 1.0E-05
Figure 13. Thermal Response
di/dt IS trr ta tp IS tb TIME 0.25 IS
Figure 14. Diode Reverse Recovery Waveform
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MMFT3055V INFORMATION FOR USING THE SOT-223 SURFACE MOUNT PACKAGE
MINIMUM RECOMMENDED FOOTPRINT FOR SURFACE MOUNTED APPLICATIONS Surface mount board layout is a critical portion of the total design. The footprint for the semiconductor packages must be the correct size to insure proper solder connection
0.15 3.8 0.079 2.0
interface between the board and the package. With the correct pad geometry, the packages will self align when subjected to a solder reflow process.
0.091 2.3 0.079 2.0 0.059 1.5 0.059 1.5
0.091 2.3
0.248 6.3
0.059 1.5
inches mm
SOT-223 POWER DISSIPATION The power dissipation of the SOT-223 is a function of the drain pad size. This can vary from the minimum pad size for soldering to a pad size given for maximum power dissipation. Power dissipation for a surface mount device is determined by TJ(max), the maximum rated junction temperature of the die, RJA, the thermal resistance from the device junction to ambient, and the operating temperature, TA. Using the values provided on the data sheet for the SOT-223 package, PD can be calculated as follows:
PD = TJ(max) - TA RJA PD = 175C - 25C = 943 milliwatts 159C/W
The values for the equation are found in the maximum ratings table on the data sheet. Substituting these values into the equation for an ambient temperature TA of 25C, one can calculate the power dissipation of the device which in this case is 943 milliwatts.
The 159C/W for the SOT-223 package assumes the use of the recommended footprint on a glass epoxy printed circuit board to achieve a power dissipation of 943 milliwatts. There are other alternatives to achieving higher power dissipation from the SOT-223 package. One is to increase the area of the drain pad. By increasing the area of the drain pad, the power dissipation can be increased. Although one can almost double the power dissipation with this method, one will be giving up area on the printed circuit board which can defeat the purpose of using surface mount technology. A graph of RJA versus drain pad area is shown in Figure 17.
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MMFT3055V
160 R JA , Thermal Resistance, Junction to Ambient ( C/W) Board Material = 0.0625 G-10/FR-4, 2 oz Copper 0.8 Watts 120 1.25 Watts* 100 *Mounted on the DPAK footprint 0.2 0.4 0.6 A, Area (square inches) 0.8 1.0 1.5 Watts TA = 25C
140
Another alternative would be to use a ceramic substrate or an aluminum core board such as Thermal Cladt. Using a board material such as Thermal Clad, an aluminum core
Prior to placing surface mount components onto a printed circuit board, solder paste must be applied to the pads. A solder stencil is required to screen the optimum amount of solder paste onto the footprint. The stencil is made of brass
The melting temperature of solder is higher than the rated temperature of the device. When the entire device is heated to a high temperature, failure to complete soldering within a short time could result in device failure. Therefore, the following items should always be observed in order to minimize the thermal stress to which the devices are subjected. * Always preheat the device. * The delta temperature between the preheat and soldering should be 100C or less.* * When preheating and soldering, the temperature of the leads and the case must not exceed the maximum temperature ratings as shown on the data sheet. When using infrared heating with the reflow soldering method, the difference shall be a maximum of 10C.
80 0.0
Figure 15. Thermal Resistance versus Drain Pad Area for the SOT-223 Package (Typical)
board, the power dissipation can be doubled using the same footprint.
SOLDER STENCIL GUIDELINES or stainless steel with a typical thickness of 0.008 inches. The stencil opening size for the SOT-223 package should be the same as the pad size on the printed circuit board, i.e., a 1:1 registration.
SOLDERING PRECAUTIONS * The soldering temperature and time shall not exceed 260C for more than 10 seconds. * When shifting from preheating to soldering, the maximum temperature gradient shall be 5C or less. * After soldering has been completed, the device should be allowed to cool naturally for at least three minutes. Gradual cooling should be used as the use of forced cooling will increase the temperature gradient and result in latent failure due to mechanical stress. * Mechanical stress or shock should not be applied during cooling * Soldering a device without preheating can cause excessive thermal shock and stress which can result in damage to the device.
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MMFT3055V
TYPICAL SOLDER HEATING PROFILE For any given circuit board, there will be a group of control settings that will give the desired heat pattern. The operator must set temperatures for several heating zones, and a figure for belt speed. Taken together, these control settings make up a heating "profile" for that particular circuit board. On machines controlled by a computer, the computer remembers these profiles from one operating session to the next. Figure 18 shows a typical heating profile for use when soldering a surface mount device to a printed circuit board. This profile will vary among soldering systems but it is a good starting point. Factors that can affect the profile include the type of soldering system in use, density and types of components on the board, type of solder used, and the type of board or substrate material being used. This profile shows temperature versus time. The line on the graph shows the actual temperature that might be experienced on the surface of a test board at or near a central solder joint. The two profiles are based on a high density and a low density board. The Vitronics SMD310 convection/infrared reflow soldering system was used to generate this profile. The type of solder used was 62/36/2 Tin Lead Silver with a melting point between 177-189C. When this type of furnace is used for solder reflow work, the circuit boards and solder joints tend to heat first. The components on the board are then heated by conduction. The circuit board, because it has a large surface area, absorbs the thermal energy more efficiently, then distributes this energy to the components. Because of this effect, the main body of a component may be up to 30 degrees cooler than the adjacent solder joints.
STEP 1 PREHEAT ZONE 1 "RAMP" 200C
STEP 2 STEP 3 VENT HEATING "SOAK" ZONES 2 & 5 "RAMP"
STEP 4 HEATING ZONES 3 & 6 "SOAK"
DESIRED CURVE FOR HIGH MASS ASSEMBLIES 150C
160C
STEP 5 STEP 6 STEP 7 HEATING VENT COOLING ZONES 4 & 7 205 TO 219C "SPIKE" PEAK AT 170C SOLDER JOINT
150C 100C 100C DESIRED CURVE FOR LOW MASS ASSEMBLIES 5C 140C
SOLDER IS LIQUID FOR 40 TO 80 SECONDS (DEPENDING ON MASS OF ASSEMBLY)
TIME (3 TO 7 MINUTES TOTAL)
TMAX
Figure 16. Typical Solder Heating Profile
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MMFT3055V
PACKAGE DIMENSIONS
SOT-223 (TO-261) CASE 318E-04 ISSUE K
A F
4
NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3
S
1 2
B
D L G J C 0.08 (0003) H M K
INCHES DIM MIN MAX A 0.249 0.263 B 0.130 0.145 C 0.060 0.068 D 0.024 0.035 F 0.115 0.126 G 0.087 0.094 H 0.0008 0.0040 J 0.009 0.014 K 0.060 0.078 L 0.033 0.041 M 0_ 10 _ S 0.264 0.287 STYLE 3: PIN 1. 2. 3. 4. GATE DRAIN SOURCE DRAIN
MILLIMETERS MIN MAX 6.30 6.70 3.30 3.70 1.50 1.75 0.60 0.89 2.90 3.20 2.20 2.40 0.020 0.100 0.24 0.35 1.50 2.00 0.85 1.05 0_ 10 _ 6.70 7.30
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MMFT3055V
Notes
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MMFT3055V
Thermal Clad is a registered trademark of the Bergquist Company.
ON Semiconductor and are trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. "Typical" parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including "Typicals" must be validated for each customer application by customer's technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer.
PUBLICATION ORDERING INFORMATION
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MMFT3055V/D


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