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TEH70 Series
70 Watt TO247 Package
Thick Film Power
FEATURES
•70Wattpowerratingat25°Ccasetemperature
•Non-inductiveperformance
•Lowthermalresistance
•RoHScompliantdesign
•Twoorthreeterminalversionsavailable
•Heatsinkcanbegroundedthroughmiddleterminal(Pstyle)
Test Conditions Of Test Performance
Load life
1000 hrs @ rated power ±1% ∆R
Moisture
resistance
MIL -STD-202, method 106 ±0.5% ∆R
Short time
overload
2x rated power for 5 sec., not to
exceed 1.5x max. working voltage
±0.3% ∆R
Solderability
MIL-STD-202, method 208
Thermal
shock
MIL-STD-202, method 170, cond. F ±0.2% ∆R
70
56
42
28
14
0
Wattage
100
Percent Rated Power
Bottom of base plate Temperature, °C
60
20
0
0
80
40
75 100 1751255025 150
Derating
Resistor
thick film on alumina
Lead
solder coated phosphor bronze
Solder
100% Sn
Case
high temperature plastic
P Package
middle terminal is electrically connected
to header and insulated from left and
right terminals
M Package
no middle terminal
Derating
linear, 100% at 25°C to 0% at 150°C
Resistance range
2Ω-10KΩ
Max. working voltage
500V or Ohm’s Law limited
Thermal Resistance
1.79°C/W
Temperature
Coefficient
2Ω-10Ω: ±100ppm
10Ω-10KΩ: ±50ppm
Insulation Resistance
400 MΩ
Short time overload
2x rated power for 5 sec., not to exceed
1.5x max. working voltage
Dielectric Strength
2000 VDC
CHARACTERISTICS
THIS PRODUCT IS DESIGNED FOR
USE WITH PROPER HEATSINKING.
Maximumbaseplatetemperatureoftheresistormust
bemonitoredandkeptwithinspecifiedlimitstoes-
tablishthepowerrating.Besttechniqueistoattacha
thermocoupletothesideofthebaseplateoftheresis-
tor.Temperatureofplastichousingorheatsinkcannot
beusedtoestablishratingoftheresistor.
(continued)