General Note

IRC reserves the right to make changes in product specification without notice or liability.

All information is subject to IRC’s own data and is considered accurate at time of going to print.

A subsidiary of

TT electronics plc

• 4222 South Staples Street • Corpus Christi Texas 78411 USA

Wire and Film Technologies Division

Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com

Tin Lead electroplated leads

All welded cap and lead construction

Heat conducting

ceramic substrate

Diamond spiraled

thick film element

Epoxy coated body

High conductivity plated on

nickel termination

Thick Film High Voltage/

High Reliability MIL-Approved

Metal Glaze™ Resistors

Environmental Data

CMH Series

Electrical Data

IRC Type

MIL

Type³

Power

Rating @

70°C (watts)¹

Voltage

Rating

(volts)²

Resistance Range

Tolerance

(±%)

Maximum

TCR

VCR (ppm/V)

CMH - 1/4

RHV30

1/4

750

330K - 100M

1, 2, 5

100

0 to -5

CMH - 1/2

RHV31

1/2

1,500

330K - 392M

CMH - 1

RHV32

1

3,000

330K - 499M

CMH - 2

RHV33

2

5,000

330K - 499M

CMH - 3

RHV34

3

10,000

330K - 1000M

CMH - 5

RHV35

5

20,000

330K - 1000M

Notes:

1. For power rating above 70C, see derating curve.

2. Voltage rating shown is the rated DC continuous working voltage or the sine-wave RMS absolute maximum voltage at com-

mercial line frequency.

3. Marked per MIL-R-49462

4. Values greater than 100 meg and less than 500 meg, ±200ppm; values greater than or equal to 500 meg, ±500ppm.

Test Condition*

Maximum

∆R

(±3

σ)

Typical

∆R

Thermal Shock

±0.25%

±0.10%

Solder Effect

±0.15%

±0.05%

Terminal Strength

±0.20%

±0.10%

Moisture Resistance

±0.50%

±0.20%

Load Life (1000 Hours at 25°C)

±1.00%

±0.25%

Shelf Life (1 year at 25°C)

±0.10%

±0.03%

Low-Temperature Operation

±0.15%

±0.05%

Shock

±0.35%

±0.10%

Vibration

±0.35%

±0.10%

Dielectric Strength

±0.15%

±0.05%

Insulation Resistance at 500 VDC

Ω min

Ω typ

Notes:

*Test per MIL-R-49462 and MIL-STD-202

CMH Series Issue September 2008 Sheet 1 of 3