The Semikron SKKT25/12 is a dual SCR (thyristor) power module designed for controlled rectification and AC phase control in demanding industrial environments. Built around Semikron's proven SKKT package platform, the device delivers a 25A average on-state current with a 1200V repetitive peak off-state voltage (VDRM/VRRM), making it well suited for mid-power switching and regulation tasks where rugged thermal performance and reliable gate triggering are critical. Its isolated copper base plate facilitates direct heatsink mounting for efficient thermal management in compact drive and controller enclosures.

The SKKT25/12 finds broad application across industrial power electronics wherever controlled AC-to-DC conversion or AC power regulation is required. Typical use cases include DC motor soft-starters and speed drives, resistive and inductive heating controllers, UPS input rectifier stages, crane and hoist drive systems, welding power supplies, and synchronous machine field excitation regulators. Its standardized footprint allows drop-in replacement in legacy equipment where Semikron thyristor modules were originally specified, reducing redesign effort for maintenance and repair teams.

Quick Reference: SKKT25/12

Key Features of the SKKT25/12:

• Dual SCR configuration in a single isolated module, simplifying half-wave or center-tap rectifier circuit assembly
• 1200V VDRM/VRRM blocking voltage provides substantial margin for line transients on 480V and 690V AC systems
• 25A IT(AV) per thyristor with low on-state voltage (VT) for reduced conduction losses in continuous duty applications
• Isolated aluminum oxide (Al₂O₃) ceramic base plate rated for high repetitive thermal cycling with low thermal resistance (Rth(j-c))
• Standard SKKT package with industry-compatible mounting hole pattern and screw-clamp gate/cathode terminals for straightforward installation and replacement
• Gate trigger current (IGT) and holding current (IH) parameters optimized for compatibility with common SCR firing boards and phase-control ICs

The SKKT25/12 carries a factory lead time of approximately 36 weeks for new production orders, a reality that increasingly affects MRO and OEM procurement teams relying on Semikron thyristor modules in active production lines or legacy equipment. ATI Accurate Technology specializes in sourcing exactly these types of constrained, long-lead-time, and hard-to-find power semiconductors. Our supply chain relationships and inventory focus on IGBTs, SCRs, diodes, and rectifier modules mean we can often locate stock or allocate production capacity faster than standard distribution channels—minimizing your downtime exposure.

ATI Accurate Technology is located in Palmetto, Florida, and ships same-day on orders placed before 5PM EST. Whether you need a single replacement module or a volume blanket order, our team is ready to help with competitive pricing and fast response. Call us at 239-734-7566 or email sales@igbts.us to check availability, request a quote, or discuss volume pricing on the SKKT25/12 and related Semikron thyristor modules.