The SEMIKRON SKKH570/12E is a high-power thyristor/diode module combining a thyristor and a freewheeling diode in a single package, rated for 570A average on-state current and a 1200V repetitive peak off-state voltage (VDRM/VRRM). Designed for half-controlled bridge rectifier topologies, this module delivers the thermal stability and surge current capability required in continuous-duty industrial power conversion systems. Its low-profile SEMIKRON SKKH package integrates base-plate mounting, dual power terminals, and isolated copper baseplate construction for direct heatsink mounting in high-density drive cabinets.

The SKKH570/12E is widely deployed in AC motor soft starters, DC drive front-end rectifiers, crane and hoist drive systems, rolling mill drives, industrial UPS, and electrochemical process rectifiers. Its combination of a controlled thyristor element and a fast-recovery diode in one module reduces component count, simplifies bus bar layout, and improves overall system reliability in environments where uptime is critical. Suitable for both OEM integration and MRO replacement in legacy drive platforms where SEMIKRON SKKH-series modules remain the specified component.

Quick Reference: SKKH570/12E

Key Features of the SKKH570/12E:

• 570A average on-state current (IT(AV)) with high surge current (ITSM) capability for robust overload tolerance
• 1200V VDRM/VRRM voltage class suitable for 480V–690V three-phase AC line applications
• Integrated thyristor + freewheeling diode in a single SKKH module package, reducing BOM complexity and assembly time
• Isolated copper baseplate with aluminum nitride (AlN) substrate for superior thermal conductivity and electrical isolation
• Gate trigger current and holding current characteristics optimized for standard SCR gate drive circuits in industrial controllers
• Compatible with standard SEMIKRON SKKH-series heatsink and busbar hardware for straightforward drop-in replacement

With a factory lead time currently exceeding 99 weeks for new production, the SKKH570/12E presents a genuine procurement challenge for maintenance teams managing unplanned downtime or scheduled outages. SEMIKRON's SKKH high-current platform is widely embedded in legacy and active drive systems globally, meaning demand routinely outpaces available inventory. ATI Accurate Technology maintains a focused network for sourcing long-lead-time and allocation-constrained SEMIKRON modules, including the SKKH570/12E. Reaching out early — before a failure event — is strongly recommended to secure your critical spare inventory.

ATI Accurate Technology is a power semiconductor distributor based in Palmetto, Florida, stocking IGBTs, thyristors, diodes, and rectifier modules including obsolete and long-lead-time parts. Orders placed before 5PM EST ship same day when stock is confirmed. For the SKKH570/12E and related SEMIKRON modules, call 239-734-7566 or email sales@igbts.us. Volume pricing is available for qualified MRO and OEM buyers.