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
• 1/4 watt to 5 watt
• TCR of ±100 ppm/°C
• Qualified to MIL-R-49462
• 330K ohm to 1G ohm range
• ±1%, ±2%, or ±5% tolerance
Electrical Data
IRC Type
MIL
Type³
Power
Rating @
70°C (watts)¹
Voltage
Rating
(volts)²
Resistance Range
(ohms)
4
Tolerance
(±%)
Maximum
TCR
(±ppm/°C)
4
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
(±3σ)
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
±10
9
Ω min 5 x 10
12
Ω typ
Notes:
*Test per MIL-R-49462 and MIL-STD-202
CMH Series Issue September 2008 Sheet 1 of 3
