The SEMIKRON SKKT253/12E is a dual thyristor (SCR) module in the SEMIPACK 3 package, rated for 253A average on-state current and a 1200V repetitive peak off-state voltage (VDRM/VRRM). Configured as two thyristors in a common-cathode or common-anode arrangement, this module is engineered for high-current phase control, soft-start, and rectification duties. It features an isolated copper base for direct heatsink mounting, low thermal resistance, and a robust construction designed to withstand the electrical and mechanical stresses of continuous industrial operation.

The SKKT253/12E is widely deployed in medium-voltage industrial drives, AC motor soft-starters, crane and hoist controls, resistance welding equipment, and UPS systems. Its high current rating and 1200V blocking capability make it a preferred choice for three-phase fully controlled bridge rectifiers and AC regulators operating from 480V to 690V supply networks. The module also sees service in electrochemical processing, induction heating systems, and power conversion stages where reliable SCR switching under heavy load cycling is critical to uptime.

Quick Reference: SKKT253/12E

Key Features of the SKKT253/12E:

• Dual SCR configuration (SEMIPACK 3 housing) optimized for fully controlled three-phase bridge rectifier topologies
• 1200V VDRM/VRRM blocking voltage with high dV/dt and dI/dt ruggedness for phase-control environments
• 253A average on-state current with low on-state voltage drop, minimizing conduction losses at full load
• Electrically isolated copper base plate enables direct, low-resistance mounting to standard SEMIKRON or compatible heatsinks
• Gate-cathode characteristics optimized for reliable triggering across the full operating temperature range (-40°C to +125°C Tj)
• Screw-terminal gate and power connections ensure low-inductance, mechanically secure circuit integration in high-vibration environments

The SKKT253/12E carries a factory lead time of approximately 30 weeks for new production orders, which is typical for high-current SEMIPACK thyristor modules as global demand for industrial power semiconductors remains elevated. For OEMs managing scheduled production builds and MRO teams facing unplanned equipment failures, waiting 30 weeks is rarely an option. ATI Accurate Technology maintains active sourcing networks for exactly these situations — we track distributor and broker channels continuously to locate genuine, traceable SEMIKRON inventory and can often bridge the gap between your need date and factory delivery.

ATI Accurate Technology is headquartered in Palmetto, Florida and ships same-day on orders placed before 5PM EST. We specialize in IGBTs, thyristors, diodes, and rectifier modules — including obsolete and long-lead-time parts like the SKKT253/12E. Volume pricing is available for OEM and MRO procurement. Call us at 239-734-7566 or email sales@igbts.us to check current availability, request a quote, or discuss your project requirements.