The SEMIKRON SKKH72/18E is a high-voltage thyristor/diode module housed in the industry-standard SKKH package, combining a 72A SCR (thyristor) with a series or freewheeling diode on a common isolated copper baseplate. Rated at 1800V repetitive peak off-state voltage, this module is engineered for reliable operation in high-power phase control, rectification, and AC/DC conversion circuits. Its isolated baseplate construction simplifies thermal management and allows direct mounting to heatsinks without additional isolation hardware, making it a preferred solution in demanding industrial drive and energy conversion equipment.

The SKKH72/18E is widely deployed in industrial AC motor drives, soft starters, DC motor controllers, resistance heating systems, and thyristor-controlled rectifiers for electrochemical and plating processes. Its high blocking voltage rating makes it well suited for applications fed directly from 690V or higher AC lines where transient overvoltages are a concern. Power conversion equipment in crane drives, mine hoists, rolling mill controls, and uninterruptible power supply front-ends also commonly utilize this module series due to its proven ruggedness and long field service history in SEMIKRON-designed power stacks.

Quick Reference: SKKH72/18E

Key Features of the SKKH72/18E:

• 1800V repetitive peak off-state and reverse voltage (VDRM/VRRM) for high-line and transient-heavy applications
• 72A average on-state current (ITAV) with isolated copper baseplate for efficient heatsink mounting
• Integrated SCR and diode in a single SKKH module footprint, reducing board space and assembly complexity
• Low thermal resistance junction-to-case (RthJC) for superior heat dissipation in continuous-duty converter service
• Industry-standard SKKH package with M6 power terminals and M5 gate/auxiliary connections for straightforward retrofits
• Manufactured to SEMIKRON quality standards with lot traceability, suitable for critical industrial and utility-grade power systems

With a factory lead time currently exceeding 99 weeks for new production, the SKKH72/18E presents a significant procurement challenge for maintenance teams managing unplanned outages or scheduled refurbishments. SEMIKRON's SKKH series modules are deeply embedded in legacy drive platforms and rectifier cabinets that may no longer see active production support, compounding the difficulty of sourcing genuine replacements. ATI Accurate Technology actively tracks inventory channels for long lead time and obsolescence-risk components like the SKKH72/18E, giving procurement professionals a reliable path to genuine OEM parts without multi-year factory queue delays.

ATI Accurate Technology is located in Palmetto, Florida and stocks a broad range of SEMIKRON thyristor and diode modules for same-day shipping on orders placed before 5PM EST. Whether you need a single emergency replacement or volume quantities for a scheduled overhaul, our team is ready to help. Call us at 239-734-7566 or email sales@igbts.us for real-time availability, volume pricing, and lead time options on the SKKH72/18E and related SEMIKRON power modules.