The ASR is a thermostat/resistor combination. The resistor is electrically located below the contact arm of the thermostat. When the thermostat contacts open at the predetermined trip temperature, the resistors are in series with the load. Thermal cutouts are also known as a TCO, thermal switch or thermal cutout switch.
The resistors maintain a temperature to the temperature sensitive Bimetal of the thermostat to maintain the contacts in the open state. To reset the self hold ASR, power must be removed and sufficient time to allow for the self hold ASR Bimetal to cool down before the thermostat resets itself to the Normally Closed position.
3/4” DISC SELF HOLD THERMAL CUT OUT
The self hold thermal cut out is designed to prevent overheat or fault conditions in a heater. Once activated in a fault condition, the contacts open and remain open. The only way to reset is to remove power from the circuit. This design feature adds extra safety over an Automatic Reset device and works much like a Manual Reset, but without the push button and without the problem of remote access to reset the device manually.
FEATURES
- Recognized UL component, tested to UL standard 873
- Available with surface, air sensing, well or cavity type mountings
- High switching current 25 AMP/240 volts
- Reliable temperature performance over the life of the device
- Ultimate safety device in critical applications
- Also available for 115VAC, 24VAC/DC, 48VAC/DC, applications
- Various mounting configurations along with different terminations available
LEARN MORE
ASR 44 - ASR SELF HOLD THERMAL CUTOUT
See Also ASR 44G - ASR Self Hold Thermal Cutout