The SEMIKRON SKCH28/14 is a thyristor/diode combination module engineered for demanding industrial power conversion applications. Combining a controlled thyristor element with a freewheeling or blocking diode in a single housing, this module simplifies circuit design while delivering robust performance in phase-controlled rectification, AC controllers, and motor drive front-ends. SEMIKRON's SKCH series is well-regarded for reliable gate triggering characteristics, low thermal resistance, and a rugged construction capable of handling the electrical stresses common in continuous-duty industrial environments.

The SKCH28/14 sees broad deployment across AC and DC motor drives, soft starters, power supplies, crane and hoist controls, heating controllers, and industrial UPS systems. Its thyristor/diode topology makes it a natural fit for half-controlled bridge configurations where a freewheeling path is required to manage inductive load energy. Field engineers also specify this module in retrofits and legacy system repairs across steel, paper, chemical processing, and material handling industries where proven SEMIKRON form factors must be maintained for dimensional and electrical compatibility.

Quick Reference: SKCH28/14

Key Features of the SKCH28/14:

• Integrated thyristor and diode in a single isolated base module, reducing component count and PCB or busbar footprint
• 1400 V repetitive peak off-state and reverse voltage (VDRM/VRRM) for margin in high-line or transient-rich industrial environments
• 28 A average on-state current (IT(AV)) rated for continuous conduction duty in rectifier and phase control topologies
• Low thermal resistance junction-to-case (RthJC) enabling effective heat dissipation through standard SEMIKRON baseplate mounting
• Isolated copper baseplate construction for direct heatsink mounting without additional isolation hardware
• Gate trigger characteristics optimized for compatibility with standard thyristor firing boards and gate drive circuits used in legacy and modern drive platforms

The SKCH28/14 carries a factory lead time of approximately 27 weeks for new production, a reality that challenges maintenance teams managing aging drives and process-critical equipment. Procurement professionals sourcing SEMIKRON thyristor/diode modules for planned shutdowns, MRO inventory replenishment, or emergency replacements cannot afford to rely solely on factory pipelines. ATI Accurate Technology actively sources long-lead-time and obsolete SEMIKRON modules through authorized and verified supply channels, providing an essential buffer for operations that cannot wait out extended manufacturer queues.

ATI Accurate Technology is based in Palmetto, Florida and specializes in 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. Call 239-734-7566 or email sales@igbts.us for real-time availability on the SKCH28/14. Volume pricing is available for stocking orders and OEM requirements.