The STMicroelectronics MSS50-1200 is a 1200V, 50A power semiconductor module engineered for high-voltage switching and rectification in industrial power electronics systems. Built to STMicro's established quality standards, this module offers the voltage blocking capability and current handling required in demanding converter and inverter topologies. Its robust construction makes it a reliable choice where thermal cycling, high junction temperatures, and repetitive surge currents are everyday operating conditions — not edge cases.

The MSS50-1200 is well suited for AC motor drives, regenerative braking systems, UPS infrastructure, induction heating equipment, welding power supplies, and industrial servo controllers. Integrators and OEMs in energy, heavy manufacturing, rail traction, and process automation have relied on STMicro modules in this class for decades. Whether you are maintaining legacy equipment or designing a new power stage, the MSS50-1200 delivers the blocking voltage and continuous current capacity to handle real-world industrial load profiles.

Quick Reference: MSS50-1200

Key Features of the MSS50-1200:

• 1200V repetitive peak reverse voltage (VRRM) providing substantial margin in 480–690VAC line-connected applications
• 50A continuous output current rating suitable for mid-range industrial converter stages
• Isolated base module construction simplifies heatsink mounting and chassis integration without additional electrical isolation hardware
• Low forward voltage drop minimizes conduction losses and reduces thermal load on the heatsink assembly
• High surge current capability (IFSM) supports reliable operation through line transients and fault recovery cycles
• Compatible with standard module footprints common across STMicro and equivalent-generation competitor platforms, easing drop-in replacement scenarios

At 99 weeks from the factory, new production lead times on the MSS50-1200 make open-market sourcing a serious risk for any project with a defined delivery schedule. Systems built around STMicro modules from this product family are still actively deployed across utilities, manufacturing plants, and transportation infrastructure — and finding replacement stock through standard distribution channels has become increasingly difficult. Procurement teams managing MRO spares or EOL equipment need a distributor with actual inventory on hand, not a backorder queue measured in years.

ATI Accurate Technology stocks the MSS50-1200 in Palmetto, Florida and ships same-day on orders placed before 5PM EST. We specialize in hard-to-find, long-lead-time, and obsolete power semiconductors — IGBTs, thyristors, diodes, and rectifier modules. Volume pricing is available for blanket orders and MRO programs. Contact our team today: 239-734-7566 | sales@igbts.us