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152
TEH140 Series
140 Watt TO-247 Power Resistors for High
Frequency and Pulse Loading Applications
THIS PRODUCT IS DESIGNED FOR
USE WITH PROPER HEATSINKING.
Maximum base plate temperature of the resistor must be
monitored and kept within specified limits to establish
the power rating. Best technique is to attach a ther-
mocouple to the side of the base plate of the resistor.
Temperature of plastic housing or heat sink cannot be
used to establish rating of the resistor.
FEATURES
•140WhighpowerresistorinTO-247moldedpackage
•Only0.9°C/Wheatresistancebetweenresistorandflangefor
excellent cooling
•Wide10mΩto510kΩ resistance range, non-inductive design
fitforhighfrequencycircuitandwidebandamplifiers
•Smallsizeandthinshapeprovidesforhighdensitydesignof
power electronics
•Completethermalconductionandheatdissipationdesignwill
be available
•Applicationsincludepowerelectronics/inverterofautomotive,
railtraction,windturbine,PV,UPSandindustrialmotorcon-
trol as harmonic filter, dumping, snubber, gate control, bleeder
resistor and rush current protection
CHARACTERISTICS
SPECIFICATIONS
(continued)
Resistance range* Nom. Resistance TCR Tolerance
0.01Ω - 0.099Ω +E12 >250ppm/°C ±5%
0.1Ω - 510KΩ +E24 100ppm/°C ±1%, ±5%
Short Time Overload ±0.5% 1.5 times rated power for 5
seconds
Withstanding Voltage 2500VAC 60 seconds. 1mA
Load Life ±1.0% 25°C, 90 min.ON, 30min.OFF,
1000hours.
Humidity ±1.0% 70°C, 90 - 95%RH, DC0.1W,
1000hours.
Temperature Cycle ±0.25% -55°C, 30 min., +155°C
30min., 5 cycles.
Soldering Heat ±0.25% 350±5°C, 3seconds,
Solderability Over 3/4 of
round
230±5°C, 3seconds.
Insulation Resistance Over 1000MΩ Between terminals and tab.
Vibration ±0.25 %
Flammability UL94V-0
Construction Thick Film
Rating Power 140 Watts at 25°C flange tem-
perature
Rating Power 3.0 Watts, Free air.
Heat Resistance 0.9°C/W From resistor to flange
Capacitance 3.68 pF At point of terminal
length 10mm
Inductance 12.25 nH At point of terminal
length 10mm
Operation Temp. Range -55 - +175°C
Max. Applied Voltage 500V or √P•R
Max. Operating Current 120A
Weight 7.2 grams
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 153
CHARACTERISTICS
TEH140 Series
140 Watt TO-247 Power Resistors for High
Frequency and Pulse Loading Applications
DIMENSIONS
(in./mm)
ORDERING INFORMATION
0.630" ±.008
(16mm ±.2)
0.787" ±.020
(20mm ±.5)
0.200" ±.020
(5.1mm ±.5)
ø0.140" ±.004
(3.55mm ±.1)
0.143" ±.007
(3.63mm ±.18)
0.060" ±.004"
(1.52mm ±.1)
0.110" ±.008
(2.8mm ±.2)
0.400" ±.010
(10.16mm ±.26)
0.189" ±.008
(4.8mm ±.2)
0.143" ±.008
(3.63mm ±.2)
0.060" ±.004
(0.80mm ±.1)
0.571" ±.020
(14.5mm ±.5)
Derating
Construction
Pulse Energy DurabilityFrequency Characteristics Temperature Rise
Applied Power (W)
Temperature Rise (°C)
160
80
40
120
00 20 40 60 80 100 120 140
Resistor film
temperature refer
to flange
with heat-sink
Pulse width (seconds)
100k
10k
1k
100
10
Pulse peak power (W)
1350W
140W
10n 1u 100u 10m 1 100
100n 10u 1m 100m 10
Flange Temperature (°C)
140
120
100
40
80
20
60
0
+175°C
% Rated Power
+25°C
0 150 20050-50 100
Frequency (MHz)
Impedance (ohm)
1000
100
1
10
10K 100K 1M 100M10M 1G
Tentative continuous-pulse power
allowance at duty 0.01. Load life
test will be necessary in actual
equipment, Because curve will
be changed by resistance, repeti-
tion, duty and operating tempera-
ture. Dotted is estimation.
TEH140M10R0FE
Series Modifier Tolerance
F= 1%
J= 5%
Ohms
R = Decimal
Example:
2R50 = 2.50Ω
25R0=25Ω
100R = 100Ω
1K00 = 1000Ω
RoHS Compliant
Leads, Tin plated Cu
Molding, epoxy
Conductor, Cu
Resistor, cermet or NiCr
Substrate, Alumina
Flange, Ni plated Cu
Between flange and resistor are insulated
rev 9/18-2
Standard part numbers
TEH140MR010JE
TEH140MR050FE
TEH140MR030FE
TEH140MR040FE
TEH140M1R00FE
TEH140M2R00FE
TEH140M3R00FE
TEH140M5R00FE
TEH140M10R0FE
TEH140M12R0FE
TEH140M15R0FE
TEH140M20R0FE
TEH140M33R0FE
TEH140M50R0FE
TEH140M75R0FE
TEH140M100RFE
TEH140M270RFE
TEH140M330RFE
TEH140M470RFE
TEH140M750RFE
TEH140M1K00FE
TEH140M4K70FE
TEH140M7K50FE
TEH140M10K0FE