The SEMIKRON SKKT42B18E is a dual thyristor (SCR) module in the established SEMIPACK housing, delivering a 42A average on-state current (I_TAV) and a 1800V repetitive peak off-state voltage (V_DRM/V_RRM). Designed for phase-control and soft-switching topologies, this module integrates two thyristors in a common package with an isolated baseplate, simplifying thermal management and heatsink mounting. It is compatible with standard SEMIKRON SEMIPACK footprints, making it a viable drop-in for legacy and current-generation drive designs alike.

The SKKT42B18E is widely deployed across industrial power electronics platforms including three-phase AC motor soft starters, DC motor drive front-end converters, crane and hoist drives, industrial heating controllers, uninterruptible power supplies, and electrochemical process rectifiers. Its 1800V voltage class provides the headroom required in 690V AC mains environments, while the 42A current rating suits mid-range drive assemblies. OEM equipment manufacturers and MRO procurement teams working on legacy drive refurbishment regularly specify this module for both new builds and field replacements.

Quick Reference: SKKT42B18E

Key Features of the SKKT42B18E:

• Dual thyristor configuration in a single SEMIPACK module package, reducing component count and assembly complexity in converter bridges
• 1800V V_DRM/V_RRM blocking voltage with a 42A I_TAV rating at case temperature, providing reliable margin in 690V three-phase grid-connected systems
• Electrically isolated copper baseplate enables direct heatsink mounting without additional isolation hardware, simplifying thermal stack design
• Low on-state voltage drop (V_T) contributes to reduced conduction losses and improved overall converter efficiency in continuous-duty applications
• Industry-standard SEMIPACK footprint ensures mechanical and electrical interchangeability with other SEMIKRON SKKT-series modules for streamlined maintenance and spares management
• Screw-terminal gate and cathode connections support robust wiring in high-vibration industrial enclosures

The SKKT42B18E carries a factory lead time of approximately 31 weeks for new production, a reality increasingly common across the power semiconductor supply chain. End users managing planned maintenance shutdowns, OEM production schedules, or capital project timelines cannot afford to wait until equipment failure to initiate procurement. ATI Accurate Technology actively sources SEMIKRON thyristor modules through authorized and franchised channels, and our team can advise on available inventory, bridge stock, and alternative configurations to keep your project or production line on schedule.

ATI Accurate Technology is headquartered in Palmetto, Florida, and specializes in IGBTs, thyristors, diodes, and rectifier modules—including hard-to-find and long lead time parts like the SKKT42B18E. Orders placed before 5PM EST ship same day. Contact our power semiconductor specialists for pricing, volume discounts, and lead time updates: 239-734-7566 | sales@igbts.us.