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+ 44 (0) 1883 717988

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The ULV(V=vertical & ULH(H=horizontal) models are UL approved metal-clad, wire-wound high-power resistors designed for

industrial and other applications. Our extruded aluminium housing provides rugged and strong protection. These models are

available with flying leads or Tab terminals and can be ordered with inductive or non-inductive windings. To conform to UL

safety requirements, ULV/ULH models differ from IRV/IRH models in that: The resistance range is smaller, the flying leads

are UL approved and the dielectric strength depends on the ohmic value.

GENERAL SPECIFICATIONS

Resistance Range [ohms]

Inductive

Non-

Inductive

Model

Wattage

Rating

on

Heat Sink

Tab

terminals

Flying

leads

Tab

terminals

Flying

leads

Resistance

Tolerance

ULH/ULV60

60

0.1-375

0.1-400

0.1-180

0.1-180

ULH/ULV80

80

0.1-281

0.1-910

0.1-110

0.1-110

ULH/ULV100

100

0.1-225

0.1-1.1K

0.1-225

0.1-240

ULH/ULV120

120

0.1-187

0.1-1.3K

0.1-187

0.1-300

ULH/ULV150

150

0.1-150

0.1-1.6K

0.1-150

0.1-390

ULH/ULV200

200

0.1-450

0.1-2.2K

0.1-450

0.1-1K

ULH/ULV300

300

0.1-300

0.1-2.7K

0.1-300

0.1-1.5K

ULH/ULV400

400

0.1-225

0.1-4.3K

0.1-225

0.1-2.2K

ULH/ULV500

500

0.1-180

0.1-6.8K

0.1-180

0.1-3K

+-2.0(G)

+-5.0(J)

+-10(K)

CHARACTERISTICS

Values in [ ] mean change in ohms after test

Temperature Range

-55C to 200C

Insulation Resistance

20M ohms minimum

Dielectric Strength

[1000V+(rated voltage×2)] / min.

Temp. Coefficient

+-260ppm/C maximum

Short Time Overload

+-[2%+0.05ohms]

60W:5Xwattage rating-5second, 80to500W: 10Xwattage rating-5seconds

Moisture Resistance

+-[3%+0.05 ohms]

40C, 95% RH, DC100V case to terminal (500hrs.)

Thermal Shock

+-[2%+0.05 ohms]

wattage rating 30min., -25C, 15minutes

Vibration

+-[1%+0.05 ohms]

10Hz-55Hz-10Hz (1min.),2hrs. each direction

Moisture Load Life

+-[3%+0.05 ohms]

40C,95%RH,0.1Xwattage rating, 1.5h.on,30min.off,500 hours

Load Life

+-[5%+0.05 ohms]

Wattage rating 1.5h. on, 30min. off, 500hours

Applied voltage : AC RMS voltage

SURFACE TEMPERATURE INCREASE VERSUS POWER LOAD

A mid-point bracket is required for 150, 300, 500W models to ensure sufficient contact with the heat sink.