Ceramic Encased Axial Lead Wire Wound Resistor

Essentially all tests and requirements present in table below follow the schedule of IEC standard publication 60115-1, 60115-4 and 60068.

Test and Requirements

The SCA Series is recommended for the use where occasional overload is upto 125% for long time [upto 2 Hrs.] are probable. This Series is also preferred for aesthetic value. The fusible resistors () are also available in this series.

Applications:

Fig - Maximum dissipation (Pmax) in percentage of rated power as a function of the ambient temperature (Tamb)

 The power that the resistor can dissipate depends on the operating temperature; see below

DERATING

Electrical Characteristics

SCA: The resistor element is a resistive wire, which is wound, on ceramic rod. Tinned copper leads are connected to the caps by welding. The resistor body is housed in a rectangular ceramic case with a special inorganic potting which is non-flammable, will not melt even at high overloads and is resistant to most commonly used cleaning solvents and moisture.

Construction

Dimensions in mm

0.81 ?0.03

11.0 ?0.8

50 ?1.5

SCA20

0.81 ?0.03

11.0 ?0.8

38 ?1.5

SCA12

0.81 ?0.03

9.5 ?0.8

38 ?1.5

SCA09

0.81 ?0.03

9.5 ?0.8

25 ?1.5

SCA06

0.81 ?0.03

7.5 ?0.8

25 ?1.5

SCA04

0.81 ?0.03

7.5 ?0.8

15 ?1.5

SCA03

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D

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