The SEMIKRON SKKT56/12D is a dual thyristor (SCR) power module configured in an industry-standard SKKT package, offering a 56A average on-state current and 1200V repetitive peak off-state voltage (VDRM/VRRM). This module integrates two SCR elements in a common isolated base package, enabling compact anti-parallel or series circuit topologies without the complexity of discrete component assembly. Designed for phase control and line-commutated converter duty, the SKKT56/12D is a proven solution in demanding industrial power electronics environments where thermal performance, gate triggering reliability, and long service life are critical.

The SKKT56/12D is widely deployed in industrial AC and DC drive systems, soft starters, crane and hoist controls, resistance welding equipment, power supplies, and battery charging rectifiers. Its robust thyristor construction makes it well-suited for line-frequency phase control applications where the device must withstand repetitive surge currents and high di/dt gate triggering conditions. OEMs and MRO procurement teams frequently specify this module in legacy drive platforms from manufacturers such as Siemens, ABB, and Eurotherm, making it an essential stocking component for field service operations and capital equipment refurbishment projects.

Quick Reference: SKKT56/12D

Key Features of the SKKT56/12D:

• Dual SCR configuration in a single isolated SKKT base module, simplifying converter bridge assembly and reducing PCB/busbar footprint
• 1200V VDRM/VRRM voltage class provides adequate margin for 480V and 690V three-phase line applications with standard derating practice
• 56A IT(AV) continuous current rating with high surge current (ITSM) capability for demanding inductive load and motor control environments
• Electrically isolated copper base plate enables direct heatsink mounting with standard thermal interface materials, supporting efficient thermal management
• Low gate trigger current (IGT) and gate trigger voltage (VGT) specifications ensure reliable firing from standard SCR gate driver and trigger board circuits
• Compatible form, fit, and function with SEMIKRON SKKT-series industry standard footprint, allowing drop-in replacement in existing drive and rectifier assemblies

The SKKT56/12D carries a current factory lead time of approximately 29 weeks for new production from SEMIKRON, placing it firmly in the long lead time category that challenges both OEM production schedules and MRO replacement timelines. Supply chain disruptions, end-of-life production runs, and consolidating distributor inventories have made modules like this increasingly difficult to source on short notice. ATI Accurate Technology actively monitors inventory pipelines and works with a global network of trusted suppliers to locate genuine SEMIKRON product, helping customers avoid costly equipment downtime while navigating extended procurement cycles.

ATI Accurate Technology is headquartered in Palmetto, Florida and stocks a broad range of SEMIKRON thyristor modules, IGBTs, diodes, and rectifier assemblies. We offer same-day shipping on in-stock orders placed before 5PM EST, with volume pricing available for MRO and OEM customers. Contact our power semiconductor specialists for real-time availability and competitive quotes. Call 239-734-7566 or email sales@igbts.us today.