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
Precision High-Voltage
Thick Film Resistors
Electrical Data
CGH Series
• 1/4 watt to 5 watt
• TCR of ±50 or ±100 ppm/°C
• 100K ohm to 2000 megohm range
• ±0.5%, ±1%, ±2% or ±5% tolerance
IRC Type Power Rating
at 70°C (watts)¹
Voltage Rating
(volts)²
Resistance
Range (ohms)³
Tolerance
(±%)4
Maximum TCR
(±ppm/°C)4VCR (ppm/V)5
CGH - 1/4 1/4 750 100K - 100M
.5, 1, 2, 5 50, 100 0 - -5
CGH - 1/2 1/2 1,500 100K - 500M
CGH - 1 1 3,000 50K - 750M
CGH - 2 2 5,000 100K - 1500M
CGH - 3 3 10,000 200K - 2000M
CGH - 5 5 20,000 300K - 2000M
Notes:
1. For power rating above 70°C, see derating curve.
2. Voltage rating shown is the rated DC continuous working voltage or the sine-wave RMS absolute maximum voltage at commercial line fre-
quency. For DC applications the absolute maximum permissible voltage is 1.5 times the value shown for low repetition short-time-overload or
pulse conditions of 10 seconds or less duration.
3. Contact factory for higher resistance values.
4. For CGH-1 and 2 above 500 meg and CGH-3 and 5 above 1000M only 2 and 5% tolerance and 100 ppm/°C TCR available.
5. Typical voltage coefficient of resistance is -1 to -2 ppm/V measured at fulll rated voltage and 10% rated voltage.
Power Derating Curve
80 100 120 140 160 180
100
90
80
70
60
50
40
30
20
10
0
Ambient Temperature (°C)
% of Rated Power
Temperature Rise Chart
Temperature Rise (°C)
% of Rated Power
100
90
80
70
60
50
40
30
20
10
0
0 10 20 30 40 50 60 70 80 90
CGH 1/4
CGH 1/2
CGH 1
CGH 2-3
CGH 5
CGH Series Issue September 2008 Sheet 1 of 3
• 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
Precision High-Voltage
Thick Film Resistors
Environmental Data
Test Condition¹ Maximum ∆R
(±3σ)Typical² ∆R
Temperature Shock ±0.25% ±0.10%
Short-Time Overload (1.5 times rated V for 10 sec) ±0.20% ±0.10%
Solder Effect ±0.015% ±0.05%
Terminal Strength ±0.20% ±0.05%
Moisture Resistance (no load or polar) ±0.50% ±0.20%
Load Life (1000 hours at 70°C) ±1.00% ±0.25%
Shelf Life (1 year at 25°C) ±0.10% ±0.03%
High-Temperature Exposure (150°C for 2000 hours)
(175°C for 2000 hours)
±0.75% ±0.30%
±0.01% ±0.40%
Dielectric Breakdown³ (1/4 and 1/2 watt size)
(1 watt through 5 watt size)
2000 VDC, 1500 VAC
3500 VDC, 2500 VAC
Dielectric Strength4±0.15% ±0.05%
Insulation Resistance at 500 VDC 109 ohms typ. 1011 ohms typ.
Notes:
1. Test method per MIL-STD-202 unless otherwise indicated.
2. Typical defined as that percent change which will include a minimum of 50% of the measured changes in resistance from a variety of lots
representing various unit sizes and ranges.
3. Values shown are the maximum safe dielectric voltage applied from a V block or foil wrapping which extends the complete body length of the
resistor under test.
4. Percent change after the maximum safe dielectric voltage is applied for 1 minute.
CGH Series Issue September 2008 Sheet 2 of 3
• 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
Physical Data
Precision High-Voltage
Thick Film Resistors
BD
CL
BL
0.032 (0.81) DIA.
1.50 ± 0.125
(38.1 ± 3.2)
Dimensions (Inches and (mm))
IRC Type Body Length - BL Body Diameter - BD Clean Lead to Clean Lead - CL
CGH - 1/4 0.275 ± 0.031 (6.98 ± 0.79) 0.088 ± 0.010 (2.22 ± 0.25) 0.400 (10.16)
CGH - 1/2 0.400 ± 0.031 (10.16 ± 0.79) 0.138 ± 0.016 (3.51 ± 0.41) 0.525 (13.34)
CGH - 1 0.690 ± 0.062 (17.53 ± 1.57) 0.297 ± 0.031 (7.54 ± 0.79) 0.900 (22.86)
CGH - 2 1.062 ± 0.062 (26.97 ± 1.57) 0.297 ± 0.031 (7.54 ± 0.79) 1.250 (31.75)
CGH - 3 2.062 ± 0.062 (52.37 ± 1.57) 0.297 ± 0.031 (7.54 ± 0.79) 2.250 (57.15)
CGH - 5 3.062 ± 0.062 (77.77 ± 1.57) 0.297 ± 0.031 (7.54 ± 0.79) 3.250 (82.55)
Sample Part No.
IRC Type
CGH 1/4, CGH 1/2, CGH 1, CGH 2, CGH 3, CGH 5
Temperature Coefficient
(±100 ppm/°C, ±50 ppm/°C)
Resistance
Tolerance
D = ±0.5%
F = ±1%
G = ±2%
J = ±5%
Ordering Data
CGH 3 - 100 - 2205 - F
CGH Series Issue September 2008 Sheet 3 of 3
