The Semikron SKKT72/18E is a dual thyristor (SCR) module from the SEMIPACK series, rated for 72A average on-state current and a peak repetitive off-state voltage of 1800V. Designed for demanding phase-control and line-commutated converter applications, this module features an isolated baseplate for simplified heatsink mounting and low thermal resistance for efficient heat dissipation. Its robust construction and proven Semikron SEMIPACK platform make it a trusted choice in high-voltage, medium-current industrial power conversion systems where reliability and long service life are non-negotiable.

The SKKT72/18E is widely deployed across a broad range of industrial power electronics applications. Typical uses include AC/DC converters, three-phase bridge rectifiers, soft starters for large motors, DC drive systems, resistance welding controls, and industrial heating regulators. It is also found in uninterruptible power supplies, crane and hoist drives, and electrochemical process equipment. Wherever controlled rectification at high voltage is required—particularly in legacy equipment still operating on original designs—this Semikron thyristor module continues to serve as a reliable, proven solution for OEM and aftermarket replacement alike.

Quick Reference: SKKT72/18E

Key Features of the SKKT72/18E:

• Dual SCR configuration in a single SEMIPACK module — simplifies converter topology and reduces PCB/bus footprint
• 1800V VDRM/VRRM blocking voltage — provides robust voltage margin for 690V and higher AC line applications
• 72A IT(AV) average current rating — suitable for medium-power phase-control and rectifier stages
• Isolated copper baseplate — enables direct heatsink mounting without additional insulation hardware, reducing assembly complexity
• Low thermal resistance (RthJC) — supports efficient junction-to-case heat transfer critical in high duty-cycle industrial environments
• Gate trigger current and latching current parameters optimized for industrial firing circuit compatibility across common SCR gate driver platforms

The SKKT72/18E carries a factory lead time of approximately 27 weeks for new production from Semikron, placing it firmly in the long lead time category that challenges both OEM production schedules and equipment maintenance timelines. For facilities managing aging drives, rectifier systems, or process controls that depend on this module, an unplanned outage waiting on a 27-week lead time is simply not an option. ATI Accurate Technology actively sources and stocks hard-to-find Semikron SEMIPACK thyristor modules, including obsolete and long lead time variants, to keep your operations running without costly delays.

ATI Accurate Technology is located in Palmetto, Florida, and ships power semiconductors same-day on orders placed before 5PM EST. Whether you need a single replacement module or volume quantities for MRO or production, our team is ready to help. Call us at 239-734-7566 or email sales@igbts.us for real-time availability, lead time updates, and volume pricing on the SKKT72/18E and the full Semikron SEMIPACK thyristor line.