Metal Glaze™ High Power Density

Surface Mount Power Resistor

MRC Series

1/2wattin1/8wattpackage

MRC1/2:0.05Ωto1.0Ω(contactfactoryforhighervalues)

150°Cmaximumoperatingtemperature

Superiorsurgehandlingcapability

RoHScompliantVersionsavailable

(contact factory for higher values)

element fired at 1000°C to

solid ceramic substrate

High temperature

dielectric coating

60/40 Solder over nickel barrier

Environmental Data

MRC Series

Metal Glaze

Surface Mount Power Resistor

MRC Applications:

The MRC1/2 will dissipate 1/2 watt at 70°C on a 1206 footprint. The MRC is recommended for applications where

board real estate is a major concern. Due to high power density and superior surge handling capability, it is also

recommended as a direct replacement on existing board designs where standard 1206 resistors are marginal or failing.

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Temperature Coefficient

As specified

MIL-R-55342E Par 4.7.9 (-55°C + 125°C)

Thermal Shock

±(0.5% + 0.01Ω)

MIL-R-55342E Par 4.7.3 (-65°C + 150°C, 5 cycles)

Low Temperature Operation

±(0.25% + 0.01Ω)

MIL-R-55342E Par 4.7.4 (-65°C @ working voltage)

Short Time Overload

±(1.0% + 0.01Ω)

MIL-R-55342E Par 4.7.5

2.5 x PxR for 5 seconds

High Temperature Exposure

±(0.5% + 0.01Ω)

MIL-R-55342E Par 4.7.6 (+150°C for 100 hours)

Resistance to Bonding Exposure ±(0.25% + 0.01Ω)

MIL-R-55342E Par 4.7.7

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

Solderability

95% minimum coverage

MIL-STD-202, Method 208 (245°C for 5 seconds)

Moisture Resistance

±(0.5% + 0.01Ω)

MIL-R-55342E Par 4.7.8 (10 cycles, total 240 hours)

Life Test

±(1.0% + 0.01Ω)

MIL-R-55342E Par 4.7.10 (2000 hours @ 70°C intermittent)

Terminal Adhesion Strength

±(1% + 0.01Ω)

no mechanical damage

1200 gram push from underside of mounted chip

for 60 seconds

Resistance to Board Bending

±(1% + 0.01Ω)

no mechanical damage

Chip mounted in center of 90mm long board, deflected 5mm

so as to exert pull on chip contacts for 10 seconds

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Size

Industry

Footprint

IRC

Type

Max.

Power Rating

Working

Max.

Voltage

Resistance

Tolerance

TCR

Product

Catagory

C

1206

MRC1/2

1/2W @ 70°C

200

400

0.1 to 0.99

1,2,5

100

Low Range

1.0 to 10K

1,2,5

50,100

Standard

20 to 10K

0.25, 0.5

50,100

Tight Tolerance

Electrical Data

Resistors

Make Possible

01.16

General Note

TT Electronics reserves the right to make changes in product specification without notice or liability.

All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.

© TT Electronics plc

www.ttelectronicsresistors.com

AllPb-freepartscomplywithEUDirective2011/65/EU(RoHS2)