Infineon Technologies TD250N1825KOFHPSA1

Overview

TD250N1825KOFHPSA1 from Infineon Technologies is a phase-control thyristor module designed for high-power AC line switching and rectification in industrial drive systems. It delivers 250 A average on-state current (TC = 85 °C), 1800 V repetitive peak off-state voltage (VDRM/VRRM), and 8000 A non-repetitive surge current (ITSM), with electrically insulated baseplate and pre-applied thermal interface material (TIM). It is used in soft starters, static switches, and UPS rectifiers.

For engineers reviewing the TD250N1825KOFHPSA1 datasheet, TD250N1825KOFHPSA1 pinout, TD250N1825KOFHPSA1 application, or TD250N1825KOFHPSA1 equivalent, key selection criteria include junction-to-case thermal resistance (0.124 K/W), critical dv/dt rating (1000 V/µs), gate trigger current (≤200 mA), and pressure-contact construction for high-cycle reliability under repetitive surge stress.

Technical Context

This thyristor module implements a dual-arm, press-pack (pressure contact) structure with two anti-parallel thyristor dies per arm, enabling bidirectional phase-controlled conduction in AC applications. Its 125 °C maximum junction temperature and 0.7 mΩ slope resistance support high-efficiency operation at rated RMS current (410 A) and low forward voltage drop (≤1.5 V at 800 A).

The device features 3.6 kV insulation test voltage (1 sec), 250 µs circuit-commutated turn-off time (tq), and 150 A/µs critical di/dt rating - all optimized for crowbar protection, motor soft-start sequencing, and regenerative braking control in medium-voltage industrial drives.

Key Specifications

Pinout & Package

Package: Press-pack, industrial standard module with electrically insulated AlN ceramic baseplate, 50 mm × 70 mm footprint, M1 mounting screws (5 Nm), and M2 terminal screws (12 Nm). Weight: 800 g.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar phase-control thyristor module applications.

Compared with TT250N18KOFHPSA1 and DT250N18KOFHPSA1, TD250N1825KOFHPSA1 uniquely combines pre-applied TIM, 0.124 K/W RthJC (per arm), and 1800 V blocking - making it optimal for space-constrained, high-volume soft starter designs requiring minimal assembly steps and repeatable thermal performance.

Availability

TD250N1825KOFHPSA1 is available at Aetrix Electronics and suitable for soft starters, UPS rectifiers, crowbar protection circuits, and static switches requiring stable component supply, long-lifecycle assurance, and traceable sourcing for industrial OEM programs.

Supply support for TD250N1825KOFHPSA1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies is a German semiconductor manufacturer specializing in power electronics, automotive ICs, and industrial control solutions, with global manufacturing and quality certification to ISO/TS 16949 and IECQ QC 080000.

This part belongs to Infineon's "Netz-Thyristor-Modul" series, engineered specifically for ruggedized, high-current phase-control applications in industrial motor drives, power conditioning, and grid-tied energy systems.

FAQ

What is the maximum allowable case temperature for continuous operation?

The maximum allowable case temperature (TC) is not explicitly specified as a standalone limit; instead, operation is constrained by junction temperature (Tvj max = 125 °C) and thermal resistance (RthJC = 0.124 K/W per arm). Using ITAVM = 250 A at TC = 85 °C as the reference point, sustained case temperatures above 85 °C require derating per the ITAVM vs. TC curve on page 7 of the datasheet, with full derating to zero current at ~115 °C for Θ = 180° conduction.

Does TD250N1825KOFHPSA1 support forced-air or liquid cooling?

Yes - the module's insulated baseplate and low RthJC (0.124 K/W) make it compatible with both forced-air and liquid-cooled heatsinks. When using liquid cooling with TIM, the effective RthCH drops to 0.015 K/W per module, enabling thermal designs that sustain 250 A at ambient temperatures up to 60 °C with ΔTjc < 40 K. Mounting must follow M2 terminal torque (12 Nm) and flatness tolerances per Infineon's Annex A.

Can this module replace older TT250N16KOF variants?

Yes, TD250N1825KOFHPSA1 is a direct upgrade to TT250N16KOF variants: it offers higher VDRM/VRRM (1800 V vs. 1600 V), identical ITAVM (250 A), same package and pinout, and adds pre-applied TIM. No PCB or mechanical redesign is needed, but gate drive timing must accommodate the slightly higher VTO (0.8 V) and identical tq (250 µs) to maintain commutation margin in existing B6 bridge layouts.

What is the creepage distance specification for this module?

The datasheet specifies creepage distance as "0 mm" - indicating that internal creepage is fully managed within the sealed press-pack structure and AlN ceramic baseplate. External creepage is determined solely by PCB layout and terminal spacing; the module itself provides 3.6 kV RMS (1 sec) insulation between baseplate and terminals, satisfying EN 61800-5-1 requirements for Pollution Degree 3 when mounted with ≥8 mm air clearance and ≥5 mm creepage on the host board.