tch series
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 provid-
ed for manual or automatic insertion.
A single screw mounting tab con-
nects 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.
35 Watt TO220 Package Thick Film Power
F e at u r e s
a p p l i c at i o n s
• 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
characteristics
Test Condition
• Switching Power Supplies
• Snubbers
• High Frequency
• Voltage Regulation
• Low Energy Pulse Loading
Resistance Range
0.05Ω to 10KΩ (higher values on request sub-
ject to derating)
Resistance
± 5% standard; ± 1% available on request
Tolerance:
Temperature
Referenced to 25°C, ∆R taken at +105°C
Coefficient
10Ω and above: ±50 ppm°C
For under 10Ω:
0R6 - 9R9: 100PPM
0R4 - 0R59: 150PPM
0R2 - 0R39: 250PPM
0R1 - 0R19: 500PPM
0R05 - 0R09: 1000PPM
Max. Operating
350V
Voltage
Dielectric Strength
1800 VAC
Insulation
10GΩ min.
Resistance
Momentary
2x rated power for 5 seconds as long as the
Overload
applied voltage ≤1.5 times the continuous
operating voltage, where ∆R ±(0.3% + 0.01Ω)
max
Terminal Material
Copper
Terminal Plating
Lead Free Solder (97% Tin, 3% Silver)
Maximum Torque
0.9 Nm
Power Rating
35 Watts @ 25°C case temperature; see derat-
ing curve, below
Working
-55°C to +175°C
Temperature
Range
Solder Process
The TCH35 cannot exceed 260°C for more
than 10 seconds during soldering process
Result ∆R
±(1.0% +0.01) Ω
±(0.3% +0.01) Ω max
±(0.2% +0.01) Ω max
±(0.2% +0.01) Ω max
Load Life
MIL-R-39009, 2000 Hours
@ Rated Pwr
Thermal
MIL-R-STD-202, Method
Shock
107, Cond. F
High Freq
MIL-R-STD-202, Method
Vibration
204, Cond. D
Terminal
MIL-R-STD-202, Method
Strength
211, Cond. A (Pull Test)
2.4N
Moisture
MIL-R-STD-202, Method
Resistance
106
± (0.5% +0.01) Ω max
Derating
TAH/TCH
100
80
Percent Rated Power
60
TCH
40
20
0
0
25
50
75
100
125
Bottom of base plate Temperature,
°C
150
175
TAH
8/14
4/ 7
0
20/35
16/28
12/21
(continued)
Rated Power, Watts
148
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
tch series
(in./mm)
35 Watt TO220 Package Thick Film Power
dimensions
0.390–0.410"
(9.91–10.41mm)
0.112–0.120"
(2.85–3.05mm)
0.230–0.250"
(5.85–6.35mm)
0.571–0.591"
(14.50–15.00mm)
0.047–0.055"
(1.20–1.40mm)
0.046–0.054"
(1.17–1.37mm)
0.027–0.034"
(0.70–0.86mm)
ø0.139–0.148"
(3.55–3.75mm)
0.157" max.
(5.00mm)
0.500–0.579"
(12.70–14.70mm)
0.159–0.190"
(4.06–4.82mm)
0.022–0.028"
(0.55–0.70mm)
0.080–0.089"
(2.05–2.25mm)
0.190–0.210"
(4.83–5.33mm)
o r d e r i n g i n F o r m at i o n
Standard Part Numbers
Package Code
Tolerance
F = 1%
J = 5% Standard
TCH35P10R0JE
Series
Ohm Value
Example:
2R40 = 2.4 Ohms
2K40 = 2400 Ohms
RoHS Compliant
Non-compliant
version unavailable
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 resis-
tor. Temperature of plastic housing or heat sink cannot
be used to establish rating of the resistor.
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
149
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