General Note
IRC reserves the right to make changes in product specifi cation 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
• 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
SMC Series
Cylindrical Surface Mount
Metal Glaze™
Compliant-Terminal Resistors
Electrical Data
IRC
Type
Industry
Standard
Footprint
Power Rating
(Watts)
Resistance
Range
(Ohms)
Tolerance
(±%)1
TCR
(±ppm/°C)
Operating
Voltage
(V)
Maximum
Voltage
(V)
SMC-1 2512 1.0 @ 70°C 1.0 to 10 Ω5 200 350 700
≥ 10 - 1 MΩ1, 2, 5 100
SMC-2 3610 2.0 @ 25°C
1.33 @ 70°C
1.0 to 10 Ω5 200 500 1000
≥ 10 - 1 MΩ1, 2, 5 100
Notes:
1 For tolerances below ±1%, please contact factory.
Characteristics Maximum Change Test Method
Temperature Coeffi cient (ppm/°C) As specifi ed MIL-PRF-55342E Par 4.7.9
(-55°C to +125°C)
Thermal Shock ±2.0% +0.01Ω (R ≤ 10Ω)
±1.0% +0.01Ω (R > 10Ω)
MIL-PRF-55342E Par 4.7.3
(-65°C to +150°C)
Low Temperature Operation ±1.0% +0.01Ω (R ≤ 10Ω)
±0.5% +0.01Ω (R > 10Ω)
MIL-PRF-55342E Par 4.7.4
(-65°C @ working voltage)
Short Time Overload ±1.0% +0.01Ω (R ≤ 10Ω)
±0.5% +0.01Ω (R > 10Ω)
MIL-PRF-55342E Par 4.7.5
(2.5 x PxR for 5 seconds)
High Temperature Exposure ±1.0% +0.01Ω (R ≤ 10Ω)
±0.5% +0.01Ω (R > 10Ω)
MIL-PRF-55342E Par 4.7.6
(+150°C for 100 hours)
Resistance to Bonding ±1.0% +0.01Ω (R ≤ 10Ω)
±0.5% +0.01Ω (R > 10Ω)
MIL-PRF-55342E Par 4.7.7
(Refl ow soldered to board @ 260°C for 10 seconds)
Solderability 95% minimum coverage MIL-STD-202, Method 208
(245°C for 5 seconds)
Moisture Resistance ±1.0% +0.01Ω (R ≤ 10Ω)
±0.5% +0.01Ω (R > 10Ω)
MIL-PRF-55342E Par 4.7.8
(10 cycles, total 240 hours)
Life Test ±1.0% +0.01Ω (R ≤ 10Ω)
±0.5% +0.01Ω (R > 10Ω)
MIL-PRF-55342E Par 4.7.10
(2000 hours @ 70°C intermittent)
Terminal Adhesion Strength ±1% +0.01
no mechanical damage
1200 gram push from underside of
mounted chip for 60 seconds
Resistance to Board Bending ±1% +0.01
no mechanical damage
Chip mounted in center of 90mm long board,
defl ected 5mm so as to exert pull on chip contacts
for 10 seconds
Operating Temperature -55°C to +150°C
Environmental Data
√
SMC Series Issue March 2010 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
Dimensions (Inches and (mm))
Industry
Footprint IRC Type L
(Length)
W
(Width/Diameter)
C
(Termination Width)
2512 SMC-1 0.250 ±0.010
(6.35 ±0.25)
0.122 ±0.003
(3.10 ±0.08)
0.060 ±0.010
(1.50 ±0.25)
3610 SMC-2 0.367 ±0.010
(9.32 ±0.25)
0.122 ±0.003
(3.10 ±0.08)
0.060 ±0.010
(1.50 ±0.25)
Physical Data
Cylindrical Surface Mount
Metal Glaze™ Compliant
Terminal Resistors
L
C
W
Recommended Solder Pad Dimensions (Refl ow):
Industry
Footprint
Dimensions (Inches and mm))
ABCDEF
2512 0.121
(3.07)
0.126
(3.20)
0.127
(3.23)
0.183
(4.65)
0.040
(1.02)
0.369
(9.37)
3610 0.170
(4.32)
0.160
(4.06)
0.213
(5.41)
0.273
(6.93)
0.044
(1.12)
0.553
(14.05)
F
E
B
D
ACA
SMC Series Issue March 2010 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
100
120
80
60
40
20
0
25 35 45 55 65 75 85 95 105 115 125 135 145
Ambient Temperature (°C)
%
O
f Rated Power
SMC-1
SMC-2
Power Derating Curve
Surge Capabilities
Cylindrical Surface Mount
Metal Glaze™ Compliant
Terminal Resistors
Industry
Footprint
Reel
Diameter*
Quantity
Per Reel
Carrier Tape
Width
Component
Pitch
SMC-1
2512
7″750 12mm 4mm
13" 2,500
SMC-2
3610 13″2,000 24mm 4mm
*The 13″ reel is considered standard and will be supplied unless otherwise specifi ed.
Standard Reel Packaging per EIA-481:
Sample Part No.
IRC Type
(SMC1 or SMC2)
Temperature Coeffi cient
(100 or 200 ppm)
Resistance Value
(First three signifi cant fi gures plus fourth digit multiplier)
Example: 2203 = 220 KΩ
51R0 = 51 Ω
2R00 = 2.0 Ω
Tolerance
F = ±1.0%, G = ±2.0%, J = ±5.0%
LF
Provides clear "Lead Free" Designation
Specifi cation Number (Optional)
Custom design identifi er for non-standard products
Packaging Code
(7 = 7" Reel, 13 = 13" Reel)
Ordering Data
SMC1 100 2003 F LF 13XXX
SMC SERIES SURGE CAPABILITY
for Non-repetitive or Low Repetition Rate Surges
Surge or Pulse Duration (Seconds)
1
10
100
1,000
10,000
100,000
1,000,000
Peak Power (Watts)
1.0E-9 1.0E-06 1.0E-03 1.0E-00
SMC-1
SMC-2
SMC SERIES SURGE CAPABILITY
for Repetitive Surges
Surge or Pulse Duration (Seconds)
1
10
100
1,000
10,000
100,000
1,000,000
Peak Power (Watts)
1.0E-4 1.0E-03 1.0E-02 1.0E-01 1.0E+00
SMC-2
SMC-1
SMC Series Issue March 2010 Sheet 3 of 3
