The Infineon TT105N16KOF is a high-voltage thyristor module rated for 105A average on-state current and a 1600V repetitive peak off-state voltage (VDRM/VRRM). Housed in a compact, industry-standard module package, it delivers reliable phase-controlled switching in high-power circuits where thermal performance and blocking voltage margin are critical. The KOF suffix denotes specific isolation and terminal configurations suited for direct heatsink mounting, minimizing thermal resistance and simplifying integration into existing power stack assemblies. This part is an established choice where proven thyristor technology is required over newer switch-mode alternatives.

The TT105N16KOF sees wide deployment across heavy industrial infrastructure. Common applications include AC motor soft starters, three-phase controlled rectifiers, DC drive front ends, UPS bypass switching, resistance welding controls, and electrochemical process power supplies. Its 1600V blocking capability provides adequate margin when operating on 690V AC bus systems, and the 105A current rating supports multi-kilowatt load management without parallel derating concerns in most duty cycles. Power conversion OEMs and retrofit engineers specify this module in steel mill drives, crane controls, pump stations, and paper machine drives where thyristor-based topology remains the preferred solution.

Quick Reference: TT105N16KOF

Key Features of the TT105N16KOF:

• 1600V repetitive peak off-state voltage (VDRM) provides robust margin on 690V and lower AC distribution systems
• 105A average on-state current (IT(AV)) rated at case temperature, supporting sustained high-power phase-control duty
• Low thermal resistance junction-to-case (RthJC) enables efficient heat transfer to external heatsinks, critical in enclosed drive cabinets
• Industry-standard module footprint ensures dimensional compatibility with existing PCB layouts and power stack hardware
• Isolated baseplate construction rated to 2500V RMS for safe mounting on grounded heatsinks without additional insulation pads
• Gate trigger current and holding current specifications optimized for compatibility with standard thyristor firing boards and pulse transformers

With a current factory production lead time of 99 weeks, procurement teams relying on Infineon's standard supply chain face serious exposure to line stoppages, retrofit delays, and MRO shortfalls. The TT105N16KOF has a long service history in installed base equipment, meaning demand for replacement units consistently outpaces replenishment cycles. Distributors without dedicated inventory positions routinely cannot fulfill urgent requests. ATI Accurate Technology maintains stock of hard-to-find and long-lead-time thyristor modules precisely to bridge this gap, providing a reliable source for both emergency replacements and planned maintenance inventory builds without waiting nearly two years for factory allocation.

ATI Accurate Technology is located in Palmetto, Florida and specializes in power semiconductors including IGBTs, thyristors, diodes, and rectifier modules. Orders placed before 5PM EST ship same-day. Whether you need a single replacement module or volume pricing for a scheduled outage kit, contact our team directly at 239-734-7566 or sales@igbts.us. Volume pricing and blanket order arrangements are available for MRO and OEM customers.