Ohmite TCH Series Data Sheet
TCH Series
175
100
Percent Rated Power
Bottom of base plate Temperature, °C
60
20
0
050 100 15025 75 125
80
40
Rated Power, Watts
20/35
16/28
12/21
8/14
4/ 7
0
TAH/TCH
TCH
TAH
35 Watt TO220 Package Thick Film Power
Ohmite’s TCH35 TO220 package
resistor provides 35W of steady state
power when properly used in today’s
well defined heat sink applications.
These very low induction resistors
are built under proprietary processes
that deliver more power handling
capability than other TO220 package
resistors of similar size.
Standard terminal forms are provided for manual or automatic insertion.
A single screw mounting tab connects to the heat sink and should be
accompanied by the use of a thermal
compound. The TCH35 Series offers a
low thermal resistance to the heat sink
of <4.28°C/W.
FEATURES
• 35W Power Rating @ 25°C
• Very Low Inductance Design
• Single Screw Mounting
• Low Thermal Resistance to
Heat Sink @ RTH<4.28°C/W
• Resistance Element is
Electrically Insulated from
Metal Heat Sink Mounting Tab
APPLICATIONS
• Switching Power Supplies
• Snubbers
• High Frequency
• Voltage Regulation
• Low Energy Pulse Loading
CHARACTERISTICS
Resistance Range
Resistance
Tolerance:
Temperature
Coefficient
Max. Operating
Voltage
Dielectric Strength
Insulation
Resistance
Momentary
Overload
Terminal Material
Terminal Plating
Maximum Torque
Power Rating
Working
Temperature
Range
Solder Process
0.05Ω to 10KΩ (higher values on request, lower
values subject to derating)
± 5% standard; ± 1% available on request
Referenced to 25°C, ∆R taken at +105°C
10Ω and above: ±50 ppm°C
For under 10Ω:
3R to 9R9: 100ppm
1R to 2R9: 300ppm
0R1 to 0R99: 700ppm
0R05 to 0R09: 1000ppm
350V
1800 VAC
10GΩ min.
2x rated power for 5 seconds as long as the
applied voltage ≤1.5 times the continuous
operating voltage, where ∆R ±(0.3% + 0.01Ω)
max
Copper
Lead Free Solder (97% Tin, 3% Silver)
0.9 Nm
35 Watts @ 25°C case temperature; see derating curve, below
-55°C to +175°C
The TCH35 cannot exceed 260°C for more
than 10 seconds during soldering process
Load Life
Thermal
High Freq
Vibration
Terminal
Strength
Moisture
Resistance
Derating
Test Condition Result ∆R
Shock
MIL-R-39009, 2000 Hours
@ Rated Pwr
MIL-R-STD-202, Method
107, Cond. F
MIL-R-STD-202, Method
204, Cond. D
MIL-R-STD-202, Method
211, Cond. A (Pull Test)
2.4N
MIL-R-STD-202, Method
106
±(1.0% +0.01) Ω
±(0.3% +0.01) Ω max
±(0.2% +0.01) Ω max
±(0.2% +0.01) Ω max
± (0.5% +0.01) Ω max
(continued)
148
Ohm Value
Example:
2R40 = 2.4 Ohms
2K40 = 2400 Ohms
Tolerance
F = 1%
J = 5% Standard
Series
TCH35P10R0JE
Package Code
RoHS Compliant
Non-compliant
version unavailable
0.390–0.410"
(9.91–10.41mm)
0.112–0.120"
(2.85–3.05mm)
ø0.139–0.148"
(3.55–3.75mm)
0.046–0.054"
(1.17–1.37mm)
0.027–0.034"
(0.70–0.86mm)
0.500–0.579"
(12.70–14.70mm)
0.190–0.210"
(4.83–5.33mm)
0.047–0.055"
(1.20–1.40mm)
0.230–0.250"
(5.85–6.35mm)
0.571–0.591"
(14.50–15.00mm)
0.157" max.
(5.00mm)
0.022–0.028"
(0.55–0.70mm)
0.159–0.190"
(4.06–4.82mm)
0.073–0.093"
(1.85–2.35mm)
TCH Series
35 Watt TO220 Package Thick Film Power
DIMENSIONS
(in./mm)
ORDERING INFORMATION
Standard Part Numbers
TCH35P100RJE
TCH35P10K0JE
TCH35P10ROJE
TCH35P150RJE
TCH35P15R0JE
TCH35P1K00JE
TCH35P1K50JE
TCH35P1R00JE
TCH35P1R50JE
TCH35P200RJE
TCH35P20R0JE
TCH35P220RJE
TCH35P22R0JE
TCH35P240RJE
TCH35P24R0JE
TCH35P2K00JE
TCH35P2K20JE
TCH35P2K40JE
TCH35P2R00JE
TCH35P2R20JE
TCH35P2R40JE
TCH35P330RJE
TCH35P33R0JE
TCH35P390RJE
TCH35P39R0JE
TCH35P3K30JE
TCH35P3K90JE
TCH35P3R30JE
TCH35P3R90JE
TCH35P470RJE
TCH35P47R0JE
TCH35P4K70JE
TCH35P4R70JE
TCH35P510RJE
TCH35P51R0JE
TCH35P5K10JE
TCH35P5R10JE
TCH35P5R60JE
TCH35P750RJE
TCH35P75R0JE
TCH35P7K50JE
TCH35P7R50JE
TCH35PR100JE
TCH35PR150JE
TCH35PR200JE
TCH35PR220JE
TCH35PR240JE
TCH35PR330JE
TCH35PR390JE
TCH35PR470JE
TCH35PR510JE
TCH35PR560JE
TCH35PR750JE
TCH35PRO50JE
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 es-
tablish the power rating. Best technique is to attach a
thermocouple 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.
149
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