Cylindrical Surface Mount
Metal Glaze™ Compliant
Terminal Resistors
SMC Series
•
•
•
•
Lead free, RoHS compliant
Uses standard IRC 2512, 3610 solder pads
Ideal for automotive and other harsh thermal applications
Uncompromising Metal Glaze™ performance gives excellent
surge performance
•
Capped terminals provide mechanical compliance-relief from
board vs. component TCE mismatch
Electrical Data
IRC
Type
SMC-1
SMC-2
Industry
Standard
Footprint
2512
3610
Power
Rating @ 70°C
(Watts)
1.0
2.0
Resistance
Range
(Ohms)
0.5 to 1M
0.5 to 2M
Tolerance
(±%)
1
1, 2, 5
1, 2, 5
TCR
(±ppm/°C)
100
100
Operating
Voltage
(V)
350
500
Maximum
Voltage
(V)
650
1000
Notes:
1
For tolerances below ±1%, please contact factory.
Environmental Data
Characteristics
Temperature Coefficient (ppm/°C)
Thermal Shock
Low Temperature Operation
Short Time Overload
High Temperature Exposure
Resistance to Bonding
Solderability
Moisture Resistance
Life Test
Terminal Adhesion Strength
Maximum Change
As specified
±0.5% +0.01Ω
±0.25% +0.01Ω
±0.5% +0.01Ω
±1% for (R>100KΩ)
±0.5% +0.01Ω
±0.25% +0.01Ω
95% minimum coverage
±0.5% +0.01Ω
±0.5% +0.01Ω
±1% +0.01
no mechanical damage
±1% +0.01
no mechanical damage
Test Method
MIL-PRF-55342E Par 4.7.9
(-55°C to +125°C)
MIL-PRF-55342E Par 4.7.3
(-65°C to +150°C)
MIL-PRF-55342E Par 4.7.4
(-65°C @ working voltage)
MIL-PRF-55342E Par 4.7.5
(2.5 x
√
PxR for 5 seconds)
MIL-PRF-55342E Par 4.7.6
(+150°C for 100 hours)
MIL-PRF-55342E Par 4.7.7
(Reflow soldered to board @ 260°C for 10 seconds)
MIL-STD-202, Method 208
(245°C for 5 seconds)
MIL-PRF-55342E Par 4.7.8
(10 cycles, total 240 hours)
MIL-PRF-55342E Par 4.7.10
(2000 hours @ 70°C intermittent)
1200 gram push from underside of
mounted chip for 60 seconds
Chip mounted in center of 90mm long board,
deflected 5mm so as to exert pull on chip contacts
for 10 seconds
-55°C to +150°C
Resistance to Board Bending
Operating Temperature
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.
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
SMC Series Issue April 2009 Sheet 1 of 3
Cylindrical Surface Mount
Metal Glaze™ Compliant
Terminal Resistors
Physical Data
L
C
W
Dimensions (Inches and (mm))
Industry
Footprint
2512
IRC Type
L
(Length)
0.250 ±0.010
(6.35 ±0.25)
0.367 ±0.010
(9.32 ±0.25)
W
(Width/Diameter)
0.122 ±0.003
(3.10 ±0.08)
0.122 ±0.003
(3.10 ±0.08)
C
(Termination Width)
0.060 ±0.010
(1.50 ±0.25)
0.060 ±0.010
(1.50 ±0.25)
SMC-1
3610
SMC-2
Recommended Solder Pad Dimensions (Reflow):
F
A
C
A
B
E
D
Industry
Footprint
2512
3610
Dimensions (Inches and mm))
A
0.121
(3.07)
0.170
(4.32)
B
0.126
(3.20)
0.160
(4.06)
C
0.127
(3.23)
0.213
(5.41)
D
0.183
(4.65)
0.273
(6.93)
E
0.040
(1.02)
0.044
(1.12)
F
0.369
(9.37)
0.553
(14.05)
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
SMC Series Issue April 2009 Sheet 2 of 3
Cylindrical Surface Mount
Metal Glaze™ Compliant
Terminal Resistors
Surge Capabilities
SMC Series Surge Capability for
Non-repetitive or Low-Repetition Rate Surges
10,000
Power Derating Curve
120
Peak Power (Watts)
1,000
SMC-2
% Of Rated Power
100
80
SMC-2
SMC-1
100
SMC-1
60
40
20
10
1
1.0E-04
0.1 msec
1.0E-03
1 msec
1.0E-02
10 msec
1.0E-01
100 msec
0
25
35
45
55
65
75
85
95
105 115 125 135 145
Ambient Temperature (°C)
Surge or Pulse Duration (Seconds)
Standard Reel Packaging per EIA-481:
Industry
Footprint
2512
3610
Reel
Diameter*
13″
7″
Quantity
Per Reel
5,000 max.
1,500 max.
Carrier Tape
Width
12mm
24mm
Component
Pitch
4mm
4mm
*The 13″ reel is considered standard and will be supplied unless otherwise specified.
Ordering Data
Sample Part No.
IRC Type
(SMC1 or SMC2)
SMC1
100
2003
F
LF
13
Temperature Coefficient
(50 or 100 ppm)
Resistance Value
(First three significant figures plus fourth digit multiplier)
Example: 2203 = 220KΩ
51R0 = 51Ω
R200 = 0.2Ω
Tolerance
C = ±0.25%, D = ±0.5%, F = ±.01%, G = ±2.0%, J = ±5.0%
LF
Provides clear "Lead Free" Designation
Packaging Code
(7 = 7" Reel, 13 = 13" Reel)
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
SMC Series Issue April 2009 Sheet 3 of 3
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