The SEMIKRON SKKH56/14E is a thyristor/diode combination power module housed in SEMIKRON's industry-standard SKKH package. Rated at 56A average on-state current (IT(AV)) and a 1400V repetitive peak off-state voltage (VDRM/VRRM), this module integrates a phase-control thyristor and a freewheeling diode in a single isolated-base housing. The co-packaged topology reduces external component count, simplifies gate drive layout, and improves thermal management through a common baseplate designed for direct heatsink mounting. It is engineered for continuous duty in demanding industrial environments requiring reliable, high-voltage power switching and rectification.

The SKKH56/14E is well-suited for single-phase and three-phase half-controlled bridge rectifiers, DC motor drive front ends, soft-start circuits, and AC power controllers found in industrial machinery, crane and hoist drives, pumps, compressors, and heating systems. Its robust construction and conservative current rating make it a reliable choice for retrofit or OEM installations where consistent commutation performance and long service life are critical. The module also sees application in UPS systems, welding equipment, and excitation circuits for synchronous machines where controlled rectification at elevated voltages is required.

Quick Reference: SKKH56/14E

Key Features of the SKKH56/14E:

• Integrated thyristor and freewheeling diode in a single SKKH isolated-base module, reducing BOM complexity and external interconnects
• 1400V VDRM/VRRM rating provides substantial voltage margin in 480V and 690V three-phase systems subjected to line transients
• 56A IT(AV) current rating supports continuous phase-control duty in industrial drive and heating applications
• Aluminum oxide (Al₂O₃) ceramic-isolated copper baseplate enables direct heatsink mounting with low thermal resistance for efficient heat dissipation
• Industry-standard SKKH footprint ensures dimensional interchangeability with equivalent modules from SEMIKRON's broader product family
• Designed for phase angles up to 180° firing, making it compatible with a wide range of thyristor gate trigger circuits and firing boards

With a factory lead time of approximately 40 weeks for new production, the SKKH56/14E presents a significant sourcing challenge for maintenance and procurement teams managing unplanned equipment failures or production line shutdowns. Obsolescence pressure on legacy drives and power controllers makes locating inventory increasingly difficult through standard distribution channels. ATI Accurate Technology specializes in exactly this scenario — maintaining inventory and supplier relationships for long-lead-time, hard-to-find, and discontinued power semiconductors so your operations are not held hostage to factory scheduling windows.

ATI Accurate Technology is located in Palmetto, Florida and ships same-day on orders placed before 5PM EST. Whether you need a single replacement module or volume quantities for a stocking program, our team is ready to assist. Contact us at 239-734-7566 or sales@igbts.us for real-time availability, volume pricing, and lead time updates on the SKKH56/14E and related SEMIKRON thyristor and rectifier modules.