POWEREX – 12-810096-00 R4 / ND431625 – Dual Thyristor SCR Power Module – 1600V 250A – Reclaimed Part

Powerex — 12-810096-00 R4 / ND431625 Thyristor Power Module

What it is

The Powerex 12-810096-00 R4, corresponding to Powerex module type ND431625, is a high-current 1600 V, 250 A dual phase-control thyristor module designed for industrial AC power control and rectification. Two high-power SCRs are integrated into a single electrically isolated POW-R-BLOK-style package, providing a compact and serviceable solution for demanding power-conversion equipment.

With approximately 393 A RMS on-state current capability and substantial non-repetitive surge-current capacity, the module is well suited for equipment exposed to high starting currents and transient loads. Typical applications include UPS input stages, controlled rectifiers, industrial soft starters, AC voltage controllers, motor-control equipment, battery chargers, and other high-current power systems.

The electrically isolated baseplate permits direct mounting to a properly prepared heatsink while maintaining isolation between the semiconductor circuit and chassis. Heavy-duty screw terminals carry the main power path, while separate gate connections provide independent triggering of the internal thyristors.

This listing is particularly useful for maintenance of legacy industrial and critical-power equipment where the equipment manufacturer may identify the component by the customer number 12-810096-00 R4 rather than the underlying Powerex ND431625 designation. Both numbers should be considered when verifying a replacement.

At-a-Glance

• Manufacturer: Powerex
• Customer / Assembly Number: 12-810096-00 R4
• Powerex Module Type: ND431625
• Voltage Rating: 1600 V
• Average On-State Current: 250 A IT_AV
• RMS On-State Current: Approximately 393 A
• Topology: Dual phase-control thyristor / SCR power module
• Mounting: Screw-mount ND4 package with isolated baseplate
• Use Cases: UPS front-ends; controlled rectifiers; soft starters; AC regulators; industrial power controls
• Condition: Reclaimed Part

Features

• High blocking voltage — 1600 V class supports demanding industrial AC and DC power-conversion systems.
• High current capability — 250 A average and approximately 393 A RMS ratings support substantial continuous loads.
• High surge capability — Designed to tolerate large short-duration currents encountered during startup and fault conditions.
• Dual SCR construction — Two thyristors integrated into one module reduce external connections and simplify service replacement.
• Isolated baseplate — Allows efficient heatsink mounting while maintaining electrical isolation.
• Serviceable connections — Heavy-duty power terminals and separate gate connections simplify integration into industrial assemblies.
• Legacy equipment support — Particularly valuable for maintaining UPS and industrial equipment using obsolete or difficult-to-source power semiconductor assemblies.

Technical Specifications

Compatibility / Representative Uses