Pulse Withstanding Fusible

Flameproof Metal Film Resistors

EMC Series

• UL1412 recognised*

• Failsafe 240V mains fusing

• Good pulse handling capability

• Small size for power rating

•

UL94-V0 flameproof protection

* Values 22R and above. UL file number E234469

Electrical Data

EMC2

Power rating at 70

°C

Watts

2

Resistance range

Ohms

4R7 – 68R

TCR (25 to 75

°C)

ppm/

°C

100

Isolation Voltage

Volts

500

Resistance Tolerance

%

10, 20

Standard Values

E12

Thermal Impedance

°C/Watt

82

Ambient temperature range

°C

-55 to +155

Physical Data

Dimensions (mm) & Weight (g)

Type

PCB mount centres

Min bend radius

EMC2

10

4

27

0.8

18.4

1.2

0.55

Construction

The metal film is deposited onto a high purity ceramic rod. End caps are force fitted and termination wires are welded

to the end caps. Finally, a cement protection is applied to the resistor body prior to marking with indelible ink. The

cement protection is applied in a manner that leaves the terminations completely clear. This permits a well-defined

body length (clean lead to clean lead dimension L).

Terminations

Material:

Solder-coated copper wire

Strength:

The terminations meet the requirements of IEC 68.2.21

Solderability:

The terminations meet the requirements of IEC 115-1 Clause 4.17.3.2

Solvent Resistance

The body protection and marking are resistant to all normal industrial cleaning solvents suitable for printed circuits.

General Note

Welwyn Components reserves the right to make changes in product specification without notice or liability.

All information is subject to Welwyn’s own test data and is considered accurate at time of print.

©Welwyn Components Limited

Welwyn Electronics Park, Bedlington, Northumberland, NE22 7AA, England. Tel: 01670 822181 Fax: 01670 829465 Web: www.welwyn-tt.com

A subsidiary of TT electronics plc

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