Feature: 1. NO CONTACT WITH LOW NOISE: No spark in thyristor module, safe and secure. Internal working mode, no internal mechanical contact work, possess low noise, more assured to use 2. HEAT DISSIPATION COPPER PLATE: Heat dissipation is fast and stable. The enhanced module adopt excellent copper bottom plate, possess smooth surface, fast heat dissipation, prevent overheating and protect the smooth operation of solid state relay 3. EXCELLENT PERFORMANCE: The semiconductor module has excellent welded structure, excellent temperature characteristics and cycling capability, and more stable performance 4. EASY INSTALLATION: The module is fixed with standard screws, support fast installation, high strength screws with strong electrical conductivity 5. FLAME RETARDANT HOUSING: Thyristor module is dedicated to inverter welder, with high temperature resistant housing, self extinguishing in case of fire Specification: Item Type: Thyristor Module Average On State Current: 150A VRRM Repeated Peak Reverse Voltage: 600V VDRM Repeat Peak Off State Voltage: 600V Application: Special for welding machine. Package List: 1 x Thyristor Module