Littelfuse, Inc. Littelfuse TCR9C Relays Provide Exceptional Temperature Control TCR9C

The TCR9C is a solid-state temperature controller relay designed for dedicated control of resistive loads up to 20 A at steady state and 200 A inrush, operating on 120-240 V ac. It uses an external NTC thermistor for temperature sensing with a setpoint accuracy of ±5% of the setpoint resistance, plus thermistor and potentiometer drift. The relay features a non-isolated, single pole, zero voltage switching output with a voltage drop of approximately 2 V at rated current and 5 mA off-state leakage at 230 V ac. It mounts via a single #10 screw on a metal surface, which serves as a heat sink, with dimensions of 50.8 mm × 50.8 mm × 38.4 mm. The unit is encapsulated, operates from −40 °C to 60 °C, and is UL recognized to UL873.