IXYS / LITTELFUSE – MCC255-16io1 – Thyristor SCR Power Module – 1600V 250A – Reclaimed Part

IXYS / Littelfuse — MCC255-16io1 Thyristor SCR Power Module

What it is

The IXYS / Littelfuse MCC255-16io1 is a high-current 1600 V, 250 A dual thyristor (SCR) power module designed for industrial phase-control and high-power AC switching applications. Its dual SCR configuration, high blocking-voltage capability, and isolated Y1-CU baseplate make it well suited for controlled rectifiers, motor soft starters, AC regulators, industrial heating controls, and UPS input stages.

Designed for demanding power-conversion equipment, the MCC255-16io1 combines a 450 A RMS on-state current capability with surge-current handling up to approximately 9.2 kA. The isolated DCB ceramic construction provides strong electrical isolation and efficient heat transfer to the heatsink, while screw-type power connections and dedicated gate/cathode connections support reliable installation in high-current industrial equipment.

This reclaimed module is particularly useful for maintaining legacy UPS systems, industrial drives, rectifier assemblies, and other equipment where the original IXYS module footprint and electrical characteristics need to be preserved.

At-a-Glance

• Manufacturer: IXYS / Littelfuse
• Part Number: MCC255-16io1
• Voltage / Current: 1600 V / 250 A I_T(AV)
• RMS On-State Current: 450 A
• Topology: Dual phase-control thyristor / SCR module
• Surge Current: Up to approximately 9.2 kA
• Isolation: 3.6 kV RMS / 1 minute
• Mounting: Screw terminals with isolated DCB baseplate
• Package: Y1-CU
• Use Cases: UPS input stages; soft starters; controlled rectifiers; AC regulators; industrial power controls
• Condition: Reclaimed Part

Features

• 1600 V blocking capability — Suitable for high-voltage industrial AC power-control applications.
• High current handling — 250 A average on-state current per arm with approximately 450 A RMS capability.
• High surge strength — I_TSM up to approximately 9.2 kA for short-duration overload and fault conditions.
• Rugged switching performance — Critical dv/dt capability of approximately 1000 V/µs.
• Low on-state losses — V_T0 approximately 0.8 V with approximately 0.68 mΩ slope resistance.
• High electrical isolation — 3.6 kV RMS isolation between the power circuit and baseplate.
• Efficient thermal construction — DCB aluminum-oxide ceramic on copper baseplate provides effective heat transfer to the heatsink.
• Legacy equipment support — Useful for maintaining industrial systems originally designed around IXYS Y1-CU power modules.

Technical Specifications

Compatibility / Representative Uses