IRC Wire and Film Technologies Division
General Note
A subsidiary of
TT electronics plc
GS-3 Series Issue January 2007
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 printing.
© IRC Wire and Film Technologies Division
Telephone: 828 264 8861 • Facsimile: 828 264 8866 • Website: www.irctt.com
• 736 Greenway Road Boone, North Carolina 28607-1860
Thick Film Semi-Precision
Metal Glaze™ Power Resistors
Specifications
GS-3 Series
• Power rating of 3W @25°C; 2W @ 70°C
• Resistance range from 1Ω to 3MΩ
• Standard tolerances of ±1%, ±2%, ±5%
• Superior surge performance
• Effective as carbon composition replacement
Part
Number
Power rating
(Watts)
Resistance
Range
(Ohms)
Tolerance
(±%)
TCR
(±ppm/°C)
Maximum
Operating
Voltage
(Volts)
Dielectric
Withstanding
Voltage
(Volts)
GS-3 2.0 (@ 70°C) 1.0 - 3M 1, 2, 5 50 (>10Ω) 1000 1000
3.0 (@ 25°C) 100, 200 (≤ 10Ω)
Maximum ∆R Limits
Test MIL-R-26 MIL-R-10509-D MIL-R-22684 GS-3
TCR ±ppm/°C 30 100 200 100/50
Load life %∆R 0.5 1.0 2.0 2.0
Short term overload %∆R 0.20 0.50 0.50 0.20
Moisture %∆R 0.20 1.50 1.50 0.40
Temperature cycling %∆R 0.20 0.50 - 0.20
Solder effect %∆R - 0.50 0.50 0.20
Termination strength %∆R 0.10 0.20 0.50 0.10
Shock %∆R 0.10 0.50 0.50 0.10
Vibration %∆R 0.10 0.50 0.50 0.10
Operating temperature -55°C to +175°C
Environmental Performance
IRC Wire and Film Technologies Division
General Note
A subsidiary of
TT electronics plc
GS-3 Series Issue January 2007
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 printing.
© IRC Wire and Film Technologies Division
Telephone: 828 264 8861 • Facsimile: 828 264 8866 • Website: www.irctt.com
• 736 Greenway Road Boone, North Carolina 28607-1860
Performance Curves
W
d
LH
Dimensions (Inches and mm)
Ordering Information
IRC Style
GS = (Fixed Film Resistor
High Stability)
Power Rating
3 = 3W@ 25ºC / 2W @ 70ºC
Sample Part No.
Resistance
First three digits represent significant figures;
fourth digit is number of zeros.
Tolerance
F = ±1%, G = ±2%, J = ±5%
RoHS Compliance
= Sn/Pb terminations
LF = RoHS-compliant product
TCR Characteristics
50 = ±50 ppm/°C
100= ±100 ppm/°C
200 = ±200 ppm/°C
(available on values greater than 10 ohms)
GS-3 100 1000 J
Ambient Temperature (°C)
r
e
woP de
t
aR
t
n
ecr
eP
0 75 125 175
100
80
60
40
20
0
Derating Chart
Percent 25°C Power Rating
)
C
º(
s
e
erg
eD
0 25 50 75 100
200
175
150
125
100
75
50
25
0
Hot Spot Temperature +25°C Ambient
TYPE L W H Ød
GS-3 0.515 ±0.010 0.225 ±0.008 1.50 ±0.125 0.032 ±0.002
(13.1 ±0.3) (5.7 ±0.2) (38.1 ±3.2) (0.8128 ±0.05)
