HSAC - HSCC

HSCC and HSAC resistors are heat sink cooled, low-power resistors, in compact housings. The resistors are available in trimmed and untrimmed versions.

HSCC and HSAC resistors are thick film resistors. These resistors come in a patented modular construction with a small footprint. The resistive material is printed on a ceramic alumina, and the terminals connect to the substrate. A glass cover film protects the resistive material. The substrate is subsequently mounted on an aluminum profile.

Power ratings for HSCC and HSAC resistors range from 22 to 300 W, and the maximum working voltage is 1200 VAC. The resistors can sustain four times the nominal power for a 10-second pulse.

The nominal power depends on heat sink temperature. Higher temperatures lead to linear derating.
The ingress protection rating for HSCC and HSAC resistors is IP00.

Standard tolerance for non-trimmed resistors is ±15%. However, trimmed resistors with ±1% or ±0.5% tolerance are also available on request. Trimmed versions need to be reduced up to 30% of the nominal power rating.

HSCC and HSAC resistors can be used as balancing resistors for capacitor banks. Their low inductance makes them suitable as snubbers and filters in power inverters.