The Sanrex PK55F160 is a thyristor/diode combination power module rated for 55A continuous current and a peak repetitive off-state voltage of 1600V. Housed in a compact, thermally efficient package typical of the Sanrex PK-series, this module integrates a thyristor (SCR) and diode in a single assembly, reducing component count and simplifying heatsink design. It is engineered for demanding industrial environments where reliable phase-controlled rectification and high blocking voltage capability are non-negotiable requirements.

The PK55F160 sees broad use in industrial AC/DC converters, DC motor drive front-ends, UPS systems, welding equipment power stages, and soft-start circuits. Its 1600V voltage class provides adequate margin for 690V AC line applications, making it well suited for heavy industrial machinery, crane drives, and process control equipment operating on medium-voltage distribution. OEM machine builders and MRO teams frequently specify this module in legacy drive platforms still in active service across manufacturing, mining, and marine sectors.

Quick Reference: PK55F160

Key Features of the PK55F160:

• 1600V repetitive peak off-state voltage (VDRM/VRRM) providing robust margin on 690V AC bus systems
• 55A average on-state current (IT(AV)) suitable for mid-range phase-controlled converter stages
• Integrated SCR and diode topology in a single isolated-base module, minimizing external interconnects and assembly complexity
• Sanrex PK-series isolated copper base for direct heatsink mounting with low thermal resistance junction-to-case
• Designed for phase-control and line-commutated converter duty cycles with high di/dt and repetitive surge handling
• Gate trigger current and holding current characteristics optimized for standard SCR driver circuits in industrial drives

The PK55F160 was officially discontinued by Sanrex, with new factory production currently quoted at 99 weeks — effectively unavailable through standard distribution channels in any practical timeframe. For maintenance engineers managing aging drive systems or procurement professionals supporting legacy equipment, waiting on factory lead times is simply not an option. Securing verified, new OEM stock from a specialist distributor is the only reliable path to keeping critical equipment operational without an expensive platform redesign or unplanned extended downtime.

ATI Accurate Technology, based in Palmetto, Florida, stocks hard-to-find, obsolete, and long-lead-time power semiconductors including the Sanrex PK55F160. We ship same-day on orders placed before 5PM EST and offer competitive volume pricing for MRO and OEM procurement programs. Contact our team directly at 239-734-7566 or sales@igbts.us to confirm availability, request a quote, or discuss application requirements.