The Mitsubishi PS21964-4S is a fully integrated Intelligent Power Module combining a six-pack IGBT inverter array with on-chip gate drive circuitry, bootstrap power supply, and comprehensive fault protection in a single DIP-style package. Engineered for compact, cost-sensitive inverter designs, it targets three-phase AC motor control applications where board space, BOM complexity, and time-to-market are critical constraints. The integrated protection suite—covering undervoltage lockout, overcurrent, and thermal shutdown—significantly reduces the external component count and simplifies system-level fault management for experienced power electronics designers.

The PS21964-4S is widely deployed in fractional to low-horsepower variable-frequency drives, inverter-duty HVAC compressors, fan and pump controllers, and light industrial servo systems. Its integrated architecture is particularly well-suited for appliance inverter platforms, refrigeration compressor drives, and single-phase-input three-phase-output converters found across building automation and process control equipment. OEMs and MRO operations servicing Mitsubishi-based drive assemblies, Daikin and Mitsubishi Electric HVAC units, and comparable inverter-controlled machinery will recognize this module as a direct drop-in replacement or production-line component.

Quick Reference: PS21964-4S

Key Features of the PS21964-4S:

• Fully integrated six-pack IGBT inverter with on-chip gate drive eliminates discrete gate resistor networks and isolated gate drive power supplies
• Built-in bootstrap circuit simplifies high-side gate drive supply design and reduces PCB layer count in space-constrained inverter layouts
• Integrated undervoltage lockout (UVLO) on both high- and low-side drivers prevents false switching during supply ramp-up and transient conditions
• On-chip overcurrent protection with fault output enables system-level fault response without additional current sensing circuitry in the gate drive loop
• Thermal shutdown function monitors junction temperature and trips before damage threshold, protecting the module under sustained overload or cooling system degradation
• DIP-style package with isolated baseplate allows direct heatsink mounting and straightforward PCB integration in standard inverter form factors

With Mitsubishi's published factory lead time for the PS21964-4S currently sitting at 99 weeks, procurement teams supporting production lines or field service operations cannot rely on standard distribution channels for near-term requirements. Component obsolescence risk is equally relevant for legacy drive platforms that have no direct second-source alternative. Stocking positions held by specialized distributors like ATI represent the only practical path to securing inventory without redesigning around an alternate module—particularly for low-volume MRO needs where a full factory minimum order quantity is neither feasible nor justified.

ATI Accurate Technology is a power semiconductor distributor located in Palmetto, Florida, maintaining ready stock of hard-to-find and long-lead-time modules including the PS21964-4S. Orders placed before 5PM EST ship same day. Contact our team for real-time availability, datasheet support, and volume pricing: call 239-734-7566 or email sales@igbts.us. We serve OEMs, contract manufacturers, and MRO operations across North America.