TL Series
Modular Heat Sinkable
Thick Film Power
The TL Series add heat sinkable options to the
thick film resistor family. The resistor element
is packaged with plastic insulators, and quick-
connect terminals in a symmetrical aluminum
profile for easy heat sink mounting. Special
tapped configurations are offered to reduce on
board component count.
Efficient thermal packaging provides improved
heat conduction to the heat sink. Self-insulating
package design increases voltage withstanding
characteristics when compared to traditional
aluminum housings. The in line mounting profile
makes the TL Series easily adaptable to most
heat sink systems. Thermal compound is always
recommended when heat sinking.
F ꢀ aT u ꢁ ꢀ S
• Very low inductance
• Low profile design
a P P L I C aT I O N S
• Semiconductor Balancing
• Frequency Converters
• Snubber
• In-Rush Current Limiter
• Bleeder Resistor
• In-Line Mounting
Profile
• 1/4” Quick connect ter-
minals
• Power Switching
• Voltage Dividers
• Consult factory for
common, isolated, or
special multiple tap
options.
SꢀꢁIꢀS SPꢀCIFICaTIONS
Thermal Resistance
Ultra*
Std**
Nominal Surge Load
Max. Voltage
Ohm
Ultra
Std.
Series
TL54
TL71
TL88
TL104
†TL122
Wattage Wattage
Power (10 sec.) between terminals
Range
(10% tol.) (3%-5% tol.)
35
96
27
71
18
48
72
1000
2000
2500
2500
2500
0.3Ω - 1MΩ
1.0Ω - 2MΩ
1.5Ω - 3MΩꢀ
2.0Ω - 4MΩ
2.0Ω - 4MΩꢀ
1.26
0.53
0.34
0.25
ꢀ
1.67
0.70
0.45
0.33
192
312
432
548
155
215
275
114
158
202
78
108
137
* For properly heat sinked, untrimmed resistors - see chart
** For properly heat sinked, trimmed resistors - see chart
† Power Ratings are theoretical. Consult Factory for details.
ChaꢁaCTꢀꢁISTICS
1200 VAC
2500 VAC
Operating voltage
Dielectric Withstanding Voltage
Resistive Element
Housing
THIS PRODUCT IS
DESIGNED FOR USE WITH
Thick Film on Alumina
Aluminum
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 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.
Glass reinforced high temperature Valox®
Tinned brass
Insulators
Terminals
27 – 275 watts
Power Range
0.3Ω – 4MΩ
Resistance Range
Tolerance
Ultra Power (U Style): ±10% std.
Standard Power: ±10% std.; 5% and 1% available
±250 PPM
Temperature Coefficient
Test Voltage for 1 Minute
Working Voltage
6000 VDC/2500 VAC
1200 VAC
12mm
External Creeping Distance
Temperature Limits
-40°C to +125°C
>1002 MΩ/500V
7mm
Insulation
Air Distance, Terminal to Ground
Inductance
50-100 nH
(continued)
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
158