Infineon Technologies TT250N18KOFHPSA1

Overview

TT250N18KOFHPSA1 from Infineon Technologies is a phase-control thyristor module designed for high-power AC line switching in industrial power conversion systems. It delivers 250 A average on-state current (TC = 85 °C), 1800 V repetitive peak off-state voltage (VDRM/VRRM), and 9100 A non-repetitive surge current (ITSM), with electrically insulated baseplate and pressure-contact die attachment. It is used in soft starters, static switches, and battery charger rectifiers where robust, thermally stable bidirectional conduction is required.

For engineers reviewing the TT250N18KOFHPSA1 datasheet, TT250N18KOFHPSA1 pinout, TT250N18KOFHPSA1 application, or TT250N18KOFHPSA1 equivalent, key selection criteria include junction-to-case thermal resistance (0.124 K/W), gate trigger current (≤200 mA), threshold voltage (≤0.8 V), slope resistance (≤0.7 mΩ), and critical dv/dt rating (1000 V/µs) - all validated under full-rated operating conditions per Infineon's 2023-09-20 technical information sheet.

Technical Context

This dual-thyristor, press-pack module operates in phase-controlled rectification and AC power control topologies. Its 1800 V VDRM/VRRM rating supports operation on 690 VAC three-phase mains with safety margin, while its 250 A ITAVM rating at TC = 85 °C enables continuous conduction in high-current drive rectifiers and crowbar circuits.

The module uses pressure-contact silicon die mounting and AlN-based internal insulation (Class I, EN61140), enabling direct mounting to heatsinks without additional isolation hardware. Its 1000 V/µs critical dv/dt and 150 A/µs di/dt capability support reliable commutation in inductive load applications such as motor drives and UPS systems.

Key Specifications

Pinout & Package

TT250N18KOFHPSA1 is housed in an industrial-standard press-pack module with electrically insulated baseplate (AlN ceramic), 50 mm × 50 mm footprint, and M2 terminal screws (12 Nm torque). The module contains two anti-parallel thyristor arms sharing a common isolated baseplate and separate anode/cathode/gate terminals per arm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TT250N16KOFHPSA1, this part adds 200 V blocking margin for improved transient resilience; compared with TD250N18KOFHPSA1, it integrates both arms into one package, reducing mounting area and thermal interface count by 50% in full-bridge designs.

Availability

TT250N18KOFHPSA1 is available at Aetrix Electronics and suitable for soft starters, static switches, battery charger rectifiers, and crowbar protection circuits requiring stable component supply, long-lifecycle support, and traceable industrial-grade sourcing.

Supply support for TT250N18KOFHPSA1 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 semiconductors, microcontrollers, and sensor solutions for industrial, automotive, and energy applications.

This part belongs to Infineon's high-power thyristor module product line, engineered for ruggedized, high-efficiency AC power control in mission-critical industrial equipment where reliability, thermal performance, and electrical isolation are paramount.

FAQ

What is the maximum allowable junction temperature for TT250N18KOFHPSA1?

The maximum junction temperature (Tvj max) is 125 °C, as specified in Infineon's 2023-09-20 technical information sheet. This rating applies under all operating conditions including surge events and defines the upper thermal limit for safe conduction. Exceeding this temperature risks irreversible degradation of the silicon die and pressure-contact interface.

Does TT250N18KOFHPSA1 require external gate drive isolation?

No - each thyristor arm has galvanically isolated gate terminals referenced to its own cathode (G1/K1 and G2/K2), and the baseplate provides 3.6 kV RMS isolation. External gate drive isolation is unnecessary unless system-level functional isolation or reinforced insulation is mandated by end-equipment safety standards.

Can TT250N18KOFHPSA1 be used in single-phase applications?

Yes - it supports single-phase full-wave rectification, phase-angle control, and static switching when configured with one arm or both arms in anti-parallel. Its 250 A ITAVM rating and 1800 V blocking voltage make it suitable for 230 VAC and 400 VAC single-phase systems with appropriate derating for conduction angle and cooling.

What is the creepage distance of TT250N18KOFHPSA1?

The creepage distance is 17 mm, measured across the insulated baseplate surface between high-voltage terminals. This value complies with IEC61140 Class I insulation requirements and supports operation in Pollution Degree 2 environments without additional conformal coating or spacing adjustments.