The SKKT280/22EH4 is a high-power dual thyristor (SCR) module from SEMIKRON, rated for 280A average on-state current and a 2200V repetitive peak off-state voltage (VDRM/VRRM). Housed in SEMIKRON's industry-standard SKKT package with an isolated baseplate, this module is engineered for demanding power conversion environments where thermal cycling, high surge currents, and voltage transients are routine. Its low forward voltage drop and high di/dt capability make it a proven choice for controlled rectifier and AC power control topologies across industrial and heavy-equipment sectors.

The SKKT280/22EH4 is widely deployed in three-phase fully controlled bridge rectifiers, DC motor drive front-ends, soft-start systems, AC power regulators, crane and hoist drives, and rolling mill power supplies. It is equally at home in UPS input stages, electrochemical processing equipment, and large industrial heating control systems where precise phase-angle firing control and robust overcurrent handling are critical. OEMs and maintenance teams working with legacy SEMIKRON-based drive cabinets frequently require this module as a form-fit-function replacement.

Quick Reference: SKKT280/22EH4

Key Features of the SKKT280/22EH4:

• 280A average on-state current (IT(AV)) with high surge current (ITSM) capability for fault-tolerant designs
• 2200V VDRM/VRRM blocking voltage providing robust margin in 690V and higher AC line applications
• Dual SCR configuration in a single SKKT package enables compact three-phase bridge rectifier assemblies with reduced busbar complexity
• Isolated copper baseplate with industry-standard mounting footprint for direct heatsink or cold-plate integration
• Low gate trigger current (IGT) and defined latching/holding current parameters for reliable firing in industrial gate drive circuits
• Manufactured to SEMIKRON's automotive-adjacent quality standards, with traceability documentation available for critical infrastructure applications

With a factory lead time of 37 weeks on new production, the SKKT280/22EH4 presents a significant procurement challenge for unplanned equipment failures or time-sensitive MRO restocking. ATI Accurate Technology specializes in exactly this scenario — sourcing long-lead-time and hard-to-find SEMIKRON power modules through established distributor networks and vetted excess inventory channels. Every unit shipped by ATI is new, original OEM product. If you are managing a planned outage, building safety stock, or responding to an unscheduled drive failure, contacting ATI early in your procurement cycle is essential to avoiding costly downtime.

ATI Accurate Technology is headquartered in Palmetto, Florida, and ships same-day on orders placed before 5PM EST. Our team works directly with maintenance engineers and procurement professionals to confirm specifications, verify cross-compatibility, and turn around quotes fast. Call us at 239-734-7566 or email sales@igbts.us for current availability, lead time updates, and volume pricing on the SKKT280/22EH4 and the full SEMIKRON SKKT product family.