The SEMIKRON SKKT56/12E is a dual thyristor (SCR) module in the SEMIPACK package format, rated for 56A average on-state current and a 1200V repetitive peak off-state voltage (VDRM/VRRM). Featuring an isolated baseplate for simplified heatsink mounting, the SKKT56/12E is engineered for controlled AC-to-DC rectification, soft-start circuits, and phase-angle power control. Its symmetrical thyristor configuration makes it a direct fit for three-phase bridge or midpoint converter topologies where reliable, gate-triggered switching is critical to system performance and uptime.

The SKKT56/12E sees wide deployment in industrial variable-speed AC and DC motor drives, battery chargers, UPS systems, electrochemical processing equipment, and resistance welding controllers. It is also found in crane and hoist drives, crane bridge rectifiers, and medium-power soft-starter assemblies where controlled inrush and precise firing angle management are essential. Wherever a rugged, thermally stable thyristor pair is needed in a space-efficient module form factor, the SKKT56/12E delivers the current handling and blocking voltage margin that industrial designers and maintenance engineers depend on.

Quick Reference: SKKT56/12E

Key Features of the SKKT56/12E:

• Dual SCR configuration in isolated SEMIPACK housing — suitable for single-phase or three-phase bridge and midpoint converter designs
• 1200V VDRM/VRRM blocking voltage with 56A IT(AV) rating provides adequate derating margin for continuous industrial duty cycles
• Isolated copper baseplate enables direct mounting to standard heatsinks without additional insulating pads, simplifying thermal management
• Low thermal resistance junction-to-case (RthJC) supports high power dissipation in forced-air or liquid-cooled assemblies
• Gate trigger characteristics compatible with standard SCR firing boards, simplifying retrofit and drop-in replacement scenarios
• SEMIKRON SEMIPACK outline ensures form-fit-function interchangeability with the broad installed base of SKKT-series modules in the field

The SKKT56/12E carries a factory lead time of approximately 30 weeks for new production from SEMIKRON, placing it firmly in the long-lead-time category that can halt a repair or new-build project. For maintenance teams managing aging drives or procurement professionals building safety stock, waiting out a 30-week production queue is rarely an option. ATI Accurate Technology actively sources hard-to-find and long-lead SEMIKRON thyristor modules through authorized and vetted supply channels, giving you a faster path to the parts you need without compromising on quality or traceability.

ATI Accurate Technology is headquartered in Palmetto, Florida and ships same-day on orders received before 5PM EST. Whether you need a single replacement module or volume quantities for MRO stock, our team is ready to help. Call us at 239-734-7566 or email sales@igbts.us for real-time availability, lead time updates, and volume pricing on the SKKT56/12E and the full SEMIKRON SEMIPACK thyristor module line.