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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