The MZ31 series PTC thermistor provides reliable overcurrent and overload protection specifically designed for inverter welding machines. This 18mm component features automatic circuit protection with recoverable functionality.

• Automatic circuit protection with steady recovery
• Contactless, noiseless, and flameless operation
• Fast response time to overcurrent conditions
• Excellent overvoltage protection performance
• Wide operating voltage range
• Small steady resistance and compact size
• Long-term stability and reliability
• No reset required after overload protection
• RoHS compliant for environmental safety

Under normal circuit conditions, current passing through the PTC thermistor remains below the rated current, maintaining low resistance for uninterrupted operation. During circuit faults where current exceeds rated levels, the PTC thermistor rapidly heats up and transitions to high resistance state, effectively disconnecting the circuit to prevent damage. Once the fault is eliminated, the component automatically returns to low resistance state, restoring normal circuit function.

Specifically designed for inverter welding machine protection systems. Compatible with various protection components including varistors, NTC thermistors, and fuses for comprehensive circuit safety.

Weighing → Ball Milling → Presintering → Granulation → Forming → Sintering → Electrode Addition → Resistance Sorting → Pressure Line → Insulation Packaging → Assembly → Voltage Detection → Resistance Inspection → Final Quality Control → Packaging → Warehouse Storage