High Reliability
Surface Mount Resistor
MCHP Series
•
•
•
•
•
•
•
DESC Approved
Excellent surge capability
Reliable Metal Glaze™ technology
Superb solderability - reflow and wave
Operating temperature -55°C to +150°C
Minimum board real estate requirements
Established SPC and continuous improvement programs
Metal Glaze™ thick
film element fired
at 1000°C to solid
ceramic substrate
High
temperature
dielectric
coating
Solder over nickel
barrier
The MCHP High Reliability Surface Mount Resistors are part
of the RG product family of precision resistors developed by
IRC in 1960 to meet the stringent demands of the military
market. In leaded form, these resistors are qualified to level
S under MIL-R-39017 and MIL-R-55182. The MCHP resistor
utilizes the core element from this series, but with modified
contacts and encapsulation.
The MCHP High Reliability Surface Mount Resistors are in compli-
ance to DESC drawings 85083 (MCHP 1/8) and 87037 (MCHP 1)
and are supplied in accordance tot he requirements of MIL-R-55342.
Under this specification, all resistors are subjected to "Thermal
Shock". Samples are selected from each lot and tested to "TCR",
"STOL", "Terminal adhesion", "Solderability", and "Visual" to ensure
the lot is in conformance to specified requirements.
Electrical Data
Size
Code¹
B
D
F
H
Industry
Footprint
1206
2010
2512
3610
IRC
Type
MCHP 1/8
MCHP 1/2
MCHP 1
MCHP 2
DESC
Drawing
95011
4
94048
95006
5
Rated Power²
(watts)
0.125 @ 70°C
0.5 @ 70°C
1.0 @ 70°C
2.0 @ 25°C
Working
Voltage³
200
300
350
500
Maximum
Voltage
400
600
700
1000
Resistance
Range (ohms)
0.1 to 1.0M
0.1 to 1.6M
0.1 to 2.2M
0.2 to 2.2M
Tolerance
(±%)
1, 2, 5
1, 2, 5
1, 2, 5
1, 2, 5
TCR
(ppm/°C)
100
100
100
100
94047
¹ See page 8 for product dimensions, recommended solder pads, and standard packaging. ² For operation above 70°C, use power derating curve. ³ Not to exceed
√
P x R
4
Formerly 85083
5
Formerly 87037
Power Derating Curve
120
100
% of Rated Power
80
60
40
20
95
00
6,
94
04
7
95
01
1,
94
04
8,
0
25 35 45 55 65 75 85 95 105 115 125 135 145
30 40 50 60 70 80 90 100 110 120 130 140 150
Ambient Temperature (°C)
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.
© IRC Wire and Film Technologies Division
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
A subsidiary of
TT electronics plc
MCHP Series Issue September 2008 Sheet 1 of 2
IRCTT [ IRC - A TT ELECTRONICS COMPANY. ]
