The SEMIKRON SKKH 280/22 E H4 is a high-power thyristor/diode combination module engineered for controlled rectifier and AC/DC converter topologies requiring dependable switching performance at elevated voltage and current levels. Rated at 280A average on-state current and a 2200V repetitive peak off-state voltage, this module integrates a thyristor and diode in a single SKKH-series package. The H4 suffix denotes an isolated baseplate configuration, simplifying thermal management and heatsink mounting in cabinet-level power assemblies. It meets the exacting demands of industrial drives, power supplies, and regenerative braking systems.

The SKKH 280/22 E H4 is widely deployed in medium-voltage industrial drives, crane and hoist control systems, traction converters, and large UPS installations where half-controlled or fully controlled bridge rectification is required. Its thyristor/diode topology suits applications needing precise phase-angle firing control alongside passive freewheeling, including DC motor drives, electrochemical power supplies, and induction heating equipment. The module's high blocking voltage rating also makes it suitable for utility-interface converters and soft-start assemblies operating on 690V or higher AC bus voltages found in heavy industrial facilities.

Quick Reference: SKKH 280/22 E H4

Key Features of the SKKH 280/22 E H4:

• 280A average on-state current (IT(AV)) supporting high continuous load demands in rectifier bridges
• 2200V repetitive peak off-state and reverse voltage (VDRM/VRRM) for margin in 690V+ AC systems
• Integrated thyristor and freewheeling diode in a single SKKH package, reducing component count and assembly complexity
• Isolated copper baseplate (H4) enabling direct heatsink mounting without additional isolation hardware
• Low thermal resistance junction-to-case (Rthjc) for efficient heat extraction in continuous-duty converter stages
• Industry-standard SKKH footprint providing drop-in compatibility with existing SEMIKRON module mounting arrangements

The SKKH 280/22 E H4 carries a factory lead time of approximately 38 weeks for new production, placing it firmly in the long-lead-time category that can stall maintenance schedules and new equipment builds alike. Procurement professionals managing spares for aging drive systems or OEM production lines cannot afford to wait on a standard purchase order. ATI Accurate Technology actively sources hard-to-find and long-lead SEMIKRON thyristor modules through established distribution channels, making it possible to secure this part ahead of critical project deadlines. Reach out early to discuss pipeline inventory and allocation options.

ATI Accurate Technology is headquartered in Palmetto, Florida and stocks power semiconductors for same-day shipping on orders placed before 5PM EST. Whether you need a single replacement module or volume quantities for a production run, our team is ready to assist. Call us at 239-734-7566 or email sales@igbts.us for pricing, lead time confirmation, and volume discount inquiries on the SKKH 280/22 E H4 and the full SEMIKRON SKKH series.