RES-TL Datasheet, PDF (1/2 Pages) Ohmite Mfg. Co. – Low profile design

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 e at u r e s
• Very low inductance
• Low profile design
• In-Line Mounting
Profile
• ¹/4” Quick connect ter-
minals
• Consult factory for
common, isolated, or
special multiple tap
options.
Applic a tions
• Semiconductor Balancing
• Frequency Converters
• Snubber
• In-Rush Current Limiter
• Bleeder Resistor
• Power Switching
• Voltage Dividers
S ER I E S S P E C I F I C A T I O N S


Ultra* Std** Nominal Surge Load Max. Voltage
Ohm
Series Wattage Wattage Power (10 sec.) between terminals Range
TL54
35
27
18
72
1000
0.3Ω - 1MΩ
TL71
96
71
48
192
2000
1.0Ω - 2MΩ
TL88
155
114
78
312
2500
1.5Ω - 3MΩ
TL104 215
158
108
432
2500
2.0Ω - 4MΩ
†TL122
275
202
137
548
2500
2.0Ω - 4MΩ
* For properly heat sinked, untrimmed resistors - see chart
** For properly heat sinked, trimmed resistors - see chart
† Power Ratings are theoretical. Consult Factory for details.
Thermal Resistance
Ultra
Std.
(10% tol.) (3%-5% tol.)
1.26
1.67
0.53
0.70
0.34
0.45
0.25
0.33
c h a r a ct e r istics
Operating voltage 1200 VAC
Dielectric Withstanding Voltage 2500 VAC
Resistive Element Thick Film on Alumina
Housing Aluminum
Insulators Glass reinforced high temperature Valox®
Terminals Tinned brass
Power Range 27 – 275 watts
Resistance Range 0.3Ω – 4MΩ
Tolerance Ultra Power (U Style): ±10% std.
Standard Power: ±10% std.; 5% and 1% available
Temperature Coefficient ±250 PPM
Test Voltage for 1 Minute 6000 VDC/2500 VAC
Working Voltage 1200 VAC
External Creeping Distance 12mm
Temperature Limits -40°C to +125°C
Insulation >1002 MΩ/500V
Air Distance, Terminal to Ground 7mm
Inductance 50-100 nH
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 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.
(continued)
158
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