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IRV, ULV, IRH, ULH
WIRE WOUND, METAL CLAD RESISTORS

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wire wound resistors

The IRV(V=vertical) & IRH(H=horizontal) models are our standard wire wound, metal clad resistors.  The ULV
and ULH models are UL approved versions of the IRV and IRH.  These models have an extruded aluminum
housing providing rugged and strong protection. Options include flying leads or tab terminals, inductive
or non-inductive windings. The most common applications for these models are motor drives, braking
and snubber applications and power sources for industrial equipment.

GENERAL SPECIFICATIONS

Model

Wattage Rating On
Heat Sink

Resistance Range [ohms]

Notes:

Standard
Tolerances

+-2%(G)
+-5%(J)
+-10%(K)
 

Optional
Tolerances

+-1.0%(F)
+-0.5%(D)
+-0.25%(C)
+-0.1%(B)

Extended
Resistances

>150K depending
on model
(please enquire)

Inductive

Inductive

Tab Terminals

Flying Leads

Tab Terminals

Flying Leads

IRV/IRH 60

60W

0.1-400

0.1-180

ULV/ULH 60

0.1-375

0.1-400

0.1-180

IRV/IRH 80

80W

0.1-910

0.1-110

ULV/ULH 80

0.1-281

0.1-910

0.1-110

IRV/IRH 100

100W

0.1-1.1K

0.1-240

ULV/ULH 100

0.1-225

0.1-1.1K

0.1-225

0.1-240

IRV/IRH 120

120W

0.1-1.3K

0.1-300

ULV/ULH 120

0.1-187

0.1-1.3K

0.1-187

0.1-300

IRV/IRH 150

150W

0.1-1.6K

0.1-390

ULV/ULH 150

0.1-150

0.1-1.6K

0.1-150

0.1-390

IRV/IRH 200

200W

0.1-2.2K

0.1-1.1K

ULV/ULH 200

0.1-450

0.1-2.2K

0.1-450

0.1-1K

IRV/IRH 300

300W

0.1-2.7K

0.1-1.5K

ULV/ULH 300

0.1-300

0.1-2.7K

0.1-300

0.1-1.5K

IRV/IRH 400

400W

0.1-4.3K

0.1-2.2K

ULV/ULH 400

0.1-225

0.1-4.3

0.1-225

0.1-2.2K

IRV/IRH 500

500W

0.1-6.8K

0.1-3K

ULV/ULH 500

0.1-180

0.1-6.8K

0.1-180

0.1-3K

CHARACTERISTICS

1/Temperature Range

-55C to +200C

2/Insulation Resistance

20Mohms minimum

3/Dielectric Strength

IRV/IRH

                  AC1500V, 3500V, 4500V, 5400V;Max. leakage current: 2mA

ULV/ULH

See Note

4/Temp. Coefficient

+-260ppm/C maximum

5/Short Time Overload

+-[2%+0.05 ohms]           60W: 5XWatt Rating-5s.,80to500W: 10 X wattage rating-5s.

6/Moisture Resistance

+-[3%+0.05 ohms]                               40C, 95% RH, DC100V case to terminal (500hrs.)

7/Thermal Shock

+-[2%+0.05 ohms]                                               wattage rating 30min., -25C, 15minutes

8/Vibration

+-[1%+0.05 ohms]                                      10Hz-55Hz-10Hz (1min.),2hrs. each direction

9/Moisture Load Life

+-[3%+0.05 ohms]         40C,95%RH,0.1Xwattage rating, 1.5h.on,30min.off,500 hours

10/Load Life

+-[5%+0.05 ohms]                                      wattage rating 1.5h. on, 30min. off, 500hours

Note:
ULV/ULH dielectric strength options of 1500V, 3500V, 4500V, 5400V are also available.
Optional dielectric strength must be higher than standard (calculated by formula)

SURFACE TEMPERATURE INCREASE VERSUS POWER LOAD (Heatsink size 400X400X3mm)

DIMENSIONS

Model

Dimensions [mm]

Weight [g]

L1 +-2

L2 +-2

L3 +-2

W
+-0.5

H
+-0.5

D1
+-
0.5

D2
+-0.5

a

b

IRH

IRV

H/V 60

100

87

60

41

22

4.3

8.65

10

12

110

113

H/V 80

150

137

110

41

22

4.3

8.65

10

12

195

189

H/V 100

165

152

125

41

22

4.3

8.65

10

12

216

215

H/V 120

182

169

142

41

22

4.3

8.65

10

12

245

241

H/V 150

210

197

170

41

22

4.3

8.65

10

12

283

290

H/V 200

165

146

125

60

30

5.3

12

13

17

485

447

H/V 300

215

196

175

60

30

5.3

12

13

17

600

600

H/V 400

265

246

225

60

30

5.3

12

13

17

770

780

H/V 500

335

316

295

60

30

5.3

12

13

17

990

980

DERATING CURVE

FLYING LEADS

Model

8mm2

5.5mm2

2mm2

1.25mm2

UL3512AWG10

UL3512AWG14

IRH/V60-150

-

-

0.1-0.99ohm

1ohm and up

-

-

IRH/V200-500

0.1-0.99ohm

1-4.99ohm

5ohm and up

-

-

-

IRH/V60-120

-

-

-

-

-

0.10ohm and up

ULH/V150

-

-

-

-

-

0.11ohm and up

ULH/V200

-

-

-

-

0.1-0.15ohm

0.16ohm and up

ULH/V300

-

-

-

-

0.1-0.22ohm

0.23ohm and up

ULH/V400

-

-

-

-

0.1-0.30ohm

0.31ohm and up

ULH/V500

-

-

-

-

0.1-0.37ohm

0.38ohm and up

ORDERING PROCEDURE EXAMPLE

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Tel:82-32-817-4325 Fax:82-32-817-4329

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