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.

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

SMC Series

surge performance

board vs. component TCE mismatch

Cylindrical Surface Mount

Metal Glaze™ Compliant

Terminal Resistors

Electrical Data

IRC

Type

Industry

Standard

Footprint

Power

Rating @ 70°C

(Watts)

Resistance

Range

(Ohms)

Tolerance

TCR

(±ppm/°C)

Operating

Voltage

(V)

Maximum

Voltage

(V)

SMC-1

2512

1.0

0.5 to 1M

1, 2, 5

100

350

650

SMC-2

3610

2.0

0.5 to 2M

1, 2, 5

100

500

1000

Notes:

Characteristics

Maximum Change

Test Method

Temperature Coefficient (ppm/°C)

As specified

MIL-PRF-55342E Par 4.7.9

(-55°C to +125°C)

Thermal Shock

±0.5% +0.01

Ω

MIL-PRF-55342E Par 4.7.3

(-65°C to +150°C)

Low Temperature Operation

±0.25% +0.01

Ω

MIL-PRF-55342E Par 4.7.4

(-65°C @ working voltage)

Short Time Overload

±0.5% +0.01

Ω

±1% for (R>100K

Ω)

MIL-PRF-55342E Par 4.7.5

(2.5 x

PxR for 5 seconds)

High Temperature Exposure

±0.5% +0.01

Ω

MIL-PRF-55342E Par 4.7.6

(+150°C for 100 hours)

Resistance to Bonding

±0.25% +0.01

Ω

MIL-PRF-55342E Par 4.7.7

(Reflow soldered to board @ 260°C for 10 seconds)

Solderability

95% minimum coverage

MIL-STD-202, Method 208

(245°C for 5 seconds)

Moisture Resistance

±0.5% +0.01

Ω

MIL-PRF-55342E Par 4.7.8

(10 cycles, total 240 hours)

Life Test

±0.5% +0.01

Ω

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,

deflected 5mm so as to exert pull on chip contacts

for 10 seconds

Operating Temperature

-55°C to +150°C

Environmental Data

√

SMC Series Issue April 2009 Sheet 1 of 3