The Semikron SKNH56/16E is a single-phase thyristor (SCR) module rated at 56A average on-state current and 1600V repetitive peak off-state voltage (VDRM/VRRM). Designed for phase-control and AC switching applications, this module integrates a thyristor configuration in Semikron's robust SKNH package, featuring an isolated baseplate for simplified heatsink mounting. Its proven construction offers stable gate triggering characteristics, low thermal resistance, and high surge current capability — making it a dependable choice for demanding industrial power conversion environments where consistent switching performance is critical.

The SKNH56/16E is well suited for industrial AC motor soft starters, resistive and inductive heating control systems, power regulators, DC drive front-end rectifiers, and crane or hoist drive systems. Its 1600V voltage class provides the necessary headroom for 690VAC line applications with standard derating margins. The module is also used in UPS front-end switching stages, transformer tap changers, and industrial furnace temperature regulation systems where precise phase-angle control and high repetitive blocking voltage are essential to sustained system reliability.

Quick Reference: SKNH56/16E

Key Features of the SKNH56/16E:

• 1600V VDRM/VRRM repetitive peak blocking voltage — suitable for 690VAC three-phase line applications with proper derating
• 56A IT(AV) average on-state current rating with high surge current (ITSM) capability for robust fault tolerance
• Low gate trigger current (IGT) and voltage (VGT) for compatibility with standard SCR gate driver circuits
• Isolated copper baseplate construction enables direct heatsink mounting without additional isolation hardware, reducing thermal resistance
• Compact SKNH industry-standard package footprint allows direct form-fit-function replacement in existing drive and control assemblies
• Characterized for phase-control duty with stable on-state voltage (VT) and predictable thermal performance across operating temperature range

Semikron thyristor modules in the SKNH series carry factory lead times of 38 weeks or more under current market conditions, making procurement planning critical for MRO and capital project teams. Whether you are managing a planned maintenance shutdown, sourcing a replacement for a field failure, or building safety stock for aging drive systems still dependent on this module, delays in ordering can translate directly to extended equipment downtime. ATI Accurate Technology specializes in navigating exactly these supply chain challenges — leveraging distributor networks and manufacturer relationships to locate new OEM inventory when standard channels fall short.

ATI Accurate Technology is headquartered in Palmetto, Florida, and stocks hard-to-find, long lead time, and obsolete power semiconductors including Semikron thyristor modules. Orders placed before 5PM EST ship same day when inventory is available. For current stock status, lead time updates, and volume pricing on the SKNH56/16E, contact our team directly at 239-734-7566 or email sales@igbts.us. We support procurement professionals and maintenance engineers with responsive quoting and application-specific sourcing assistance.