EUPEC – DT142N12KOF – IGBT Power Transistor – Reclaimed Part

EUPEC / Infineon — DT142N12KOF Diode–Thyristor Power Module — 1200 V • 142 A • Phase-Control SCR / Diode • 34 mm PowerBLOCK • Isolated Baseplate

What It Is

The EUPEC / Infineon DT142N12KOF is a rugged 1200 V diode-thyristor phase-control power module designed for industrial rectifiers, soft starters, AC controllers, power converters, and other high-current line-frequency switching applications.

Built in Infineon’s proven 34 mm PowerBLOCK package, the module combines a power diode and an SCR/thyristor in an internally isolated, screw-mounted assembly. Pressure-contact semiconductor construction and a thermally conductive isolated baseplate provide dependable high-current performance while simplifying mounting to a common heatsink.

The DT142N12KOF is especially useful for servicing legacy industrial equipment where maintaining the original electrical characteristics, internal circuit configuration, and mechanical footprint is critical.

At a Glance

• Blocking Voltage: 1200 V
• Average Current Rating: 142 A at specified case temperature
• Configuration: Diode / SCR phase-control module
• Surge Current: Approximately 4.1 kA at 10 ms
• Package: 34 mm PowerBLOCK
• Construction: Pressure-contact semiconductor design with isolated baseplate
• Typical Applications: Controlled rectifiers, soft starters, AC controllers, industrial power conversion, DC drives, and power supplies

Key Features

• 1200 V blocking capability — designed for high-voltage industrial power-control circuits.
• 142 A current class — supports substantial continuous load current when properly cooled and installed.
• High surge capability — approximately 4.1 kA non-repetitive surge current at 10 ms.
• Phase-control SCR topology — suited to controlled rectification, AC regulation, and motor soft-start applications.
• Pressure-contact construction — provides a robust internal electrical and thermal interface for demanding industrial service.
• Isolated baseplate — simplifies heatsink installation and electrical isolation.
• 34 mm PowerBLOCK footprint — common industrial module format used across many legacy power-conversion platforms.

Technical Specifications

Why the Surge Rating Matters

Industrial rectifier and motor-control systems can experience very high short-duration currents during startup, capacitor charging, fault events, or motor inrush. The DT142N12KOF’s multi-kiloamp surge capability gives the module substantial short-term current headroom beyond its normal continuous operating rating.

Proper heatsinking, mounting pressure, gate drive, overcurrent protection, and thermal management remain essential to reliable operation.

Compatibility / Representative Uses