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TPG250, TPG300 CHASSIS MOUNTED NON-INDUCTIVE HIGH POWER RESISTORS TO227

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INTRODUCTION
This is a small, TO227, chassis mounted, high power resistor.  It attaches to an air cooling heatsink or can be
water cooled when necessary.  The rated power is 300W (one element) or 250W (two elements).  This model
has M4 screw terminals and very low series inductance.  They are also vibration-proof and exhibit perfect
heat dissipation.  Applications include:  Snubber resistors for power supplies, gate resistors, pulse generators,
high frequency amplifiers, dumping resistors for theatre audio.  An interior copper plate adds to the already
excellent heat dissipation.

GENERAL SPECIFICATIONS

Model	Resistance Range [ohms]	TCR[ppm/C] See: Note 2	Tolerance[%]	Power Rating on Heatsink [W]
TPG250	1 to 1K(dual)	+-100	+-5	250
TPG300	1 to 1K(single)			300

Notes:
1/  Maximum voltage is 300V or Root(PR)
2/  Test temperature:  -55C to 155C

CHARACTERISTICS                                                  Values in [ ] mean change in ohmic value after test

Test	Limit	Condition
Max Applied Voltage	Root(PR)
Withstanding Voltage	2500VDC	60sec.
Load life	+-[1.0%+0.05ohm]	25C, 90min. ON, 30min.OFF, 1000hours.
Humidity	+-[1.0%+0.05ohm]	70C, 90-95%RH, DC0.1W, 1000hrs.
Temperature Cycle	+-[1.0%+0.05ohm]	See:  Note 1
Short Time Overload	+-[0.25%+0.05ohm]	Power Rating X 2.5, 2.5sec. with heatsink
Soldering heat	+-[0.25%+0.05ohm]	350+-5C, 3 seconds.
Solderability	N/A
Insulation Resistance	Over 1000Mohms	Between Terminals and Tab
Vibration	+-[0.25%+0.05ohm]

DIMENSIONS

Type T (mm) A 38+/-0.5 B 25+/-0.5 C 15+/-0.5 D 30+/-0.2 E 15+/-0.5 F 13+/-0.5 G 2-3.2dia. H 4-M4.0

SCHEMATIC

TEMPERATURE RISE AND DERATING CURVES

ORDERING PROCEDURE EXAMPLE

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