- NTC Thermistors
- NTC Temp Sensors
- Platinum RTD Temp Sensors
- Thermal Protection
- Circuit Protection
SO self-hold thermal cut-outs are similar to auto-reset types except that they are fitted with an internal heating resistor. Once the SO limiter reaches its set-point, the contacts open and the load current then passes through this internal heater. The heat thus generated stops the SO bimetal disc from auto-resetting and protects the appliance from over-heating.
The SO cut-out will then remain in this open-circuit condition until the applied power is switched off and is allowed to cool down. The SO will then auto-reset thus re-making the electrical circuit. Basically the SO self-hold has the benefits of both auto-reset and manual-reset cut-outs without the limitations of either.
The SO is also available with various terminal types, numerous mounting flanges and calibrations from -5°C to +200°C. The internal heater can be chosen to work with voltages from 12V to 240V which makes the SO self-hold device a very flexible thermal protector.
- Heating appliances
- Coffee machines
- Catering equipment
- Electric heaters
- Internal heater allows remote reset
- Range -5°C/+200°C (T200 Rated)
- Voltage options from 12V to 240VAC
- Various mounting and terminal types