RES-TGH Datasheet, PDF (1/2 Pages) Ohmite Mfg. Co. – Due to their non-inductive design

TGH Series
120 and 200 Watt SOT227Package
Thick Film Power
Due to their non-inductive design, these resistors are
ideally suited for high-frequency and pulse-load applica-
tions.  Available in 120- or 200-watt sizes, this resistor
is designed for direct mounting onto a heatsink.  Popular
applications include variable speed drives, power sup-
plies, control devices, telecom, robotics, motor controls,
and other switching designs.
characteristics
Heat Sink Nickel-plated copper
Contacts Nickel-plated copper
Substrate Al203 (96%)
Molding Compound High-performance epoxy, compliant to UL94-V0
Terminal Nuts American standard 303 stainless steel
Resistance Range 0.1Ω to 1MΩ
Tolerance ±5%; other tolerances available on request
Temperature coefficient: ±250ppm (at +105°C ref. to +25°C)
Max. Work.Voltage 500V (up to 1,000V on special request)
Power Rating at 85°C 120W (see derating)
Partial Discharge up to 2,000Vrms/80 pC
Voltage Proof Dielectric Strength up to 4,000V DC against ground
Heat Resistance to Cooling Plate Rth <0.35 K/W
Capacitance/Mass 45pF
Working Temp. Range -55°C to +155°C
Max. Torque for Base Plate (static) 1.5 Nm
Max. Torque for Contacts (static) 1.3 Nm. M4 screws (not included)
Derating (thermal resistance) 2.86W/°K (0.35°K/W)
Derating
Type: H L
100
120 200
80
96 160
60
72 120
40
48 80
20
24 40
0
00
0 25 50 85 100 125 150 175
Bottom of base plate Temperature, °C
Best results can be reached by using a
thermal transfer compound with a heat
conductivity of better than 1W/mK
Configurations
(per package)
Config. 1
Config. 2
4
1
21
Performance Data
Test Method
ΔR
Moisture Resistance MIL-Std-202, Method 106
(0.5% + 0.001W) max
Thermal shock Mil-Std-202, Method 107, Cond F
(0.3% + 0.01W) max
Terminal Strength MIL-Std-202, Method 211, Cond A (pull test) 2.4N (0.2% = 0.01W) max
Vibration, High Frequency MIL-Std-202, Method 204, Cond D
(0.2% + 0.01W) max
Life 20 years (120,000 hours) Operating failure rate of 8.3 x 10-7 fail/hour.
Requirements to be achieved under the following conditions: Tamb=25°C, THS=70°C, Papplied=Pn
154
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