Infineon Technologies TT370N18KOFHPSA1

Overview

TT370N18KOFHPSA1 from Infineon Technologies is a phase-control thyristor module designed for high-power AC line switching and rectification in industrial power electronics. It features 1800 V repetitive peak off-state voltage (VDRM/VRRM), 364 A average on-state current at TC = 85°C, 12.1 kA non-repetitive surge current (ITSM), and electrically insulated baseplate construction. It is used in soft starters, static switches, and UPS rectifiers where robust, medium-power bidirectional AC control is required.

For engineers reviewing the TT370N18KOFHPSA1 datasheet, TT370N18KOFHPSA1 pinout, TT370N18KOFHPSA1 application, or TT370N18KOFHPSA1 equivalent, key selection criteria include junction-to-case thermal resistance (0.1 K/W), gate trigger current (≤200 mA), critical dv/dt rating (1000 V/µs), and pressure-contact die attachment for reliability under thermal cycling.

Technical Context

This thyristor module implements a dual-arm, press-pack structure with silicon pellets mounted via pressure contact technology-eliminating wire bonds and solder layers to enhance thermal stability and cycle life. Each arm supports full-wave phase-controlled conduction with symmetrical forward/reverse blocking capability up to 1800 V and commutated turn-off time of 200 µs at rated conditions.

It operates within a junction temperature range of –40°C to +135°C and requires forced-air or liquid-cooled heatsinking due to its low RthJC (0.1 K/W per module) and high I²t rating (732,050 A²s at 25°C). Gate drive must comply with diG/dt ≥1 A/µs and vG ≥2 V to ensure reliable latching at 1200 mA IL.

Key Specifications

Pinout & Package

TT370N18KOFHPSA1 uses an industrial-standard press-pack module package with electrically insulated aluminum nitride (AlN) baseplate and 50 mm × 50 mm footprint. Mechanical mounting uses M1 screws (5 Nm torque); electrical terminals use M2 screws (12 Nm torque) for main anode/cathode and gate connections.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TD370N18KOF and TT500N18KOF, TT370N18KOFHPSA1 delivers optimal balance of surge robustness, thermal efficiency, and gate drive simplicity for 364–520 A industrial phase-control applications without overdesigning cost or size.

Availability

TT370N18KOFHPSA1 is available at Aetrix Electronics and suitable for soft starters, UPS rectifiers, static switches, and crowbar protection systems requiring stable component supply, long-lifecycle support, and traceable industrial-grade sourcing.

Supply support for TT370N18KOFHPSA1 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 renewable energy markets.

This part belongs to Infineon's "Thyristor Modules" product line, engineered specifically for high-reliability, medium-power AC power control in harsh industrial environments using pressure-contact packaging and advanced thermal management.

FAQ

What is the maximum allowable case temperature for continuous operation?

The maximum allowable case temperature (TC) is +135°C, aligned with the device's maximum junction temperature (Tvj max = +135°C) and RthJC = 0.1 K/W. At this temperature, ITAVM remains 364 A per arm under sinusoidal conduction with Θ = 180°, provided heatsink thermal resistance (RthCH) does not exceed 0.02 K/W per module.

Does TT370N18KOFHPSA1 require forced cooling?

Yes-due to its 364 A ITAVM rating and low RthJC, effective heat removal is mandatory. Natural convection is insufficient; forced air (≥5 m/s) or liquid cooling is required to maintain TC ≤85°C under full load. Thermal modeling must include RthCH (max 0.02 K/W) and ambient temperature constraints.

Can this module be used in a single-phase full-wave bridge?

Yes-it contains two independent thyristor arms (A1/K1 and A2/K2) enabling direct implementation of single-phase full-wave (B2) rectification or phase-controlled AC voltage regulation. Gate terminals G1/K1G and G2/K2G must be driven with matched timing and isolation to prevent shoot-through.

What gate drive voltage and current are required for reliable turn-on?

A minimum gate trigger voltage of 2 V and peak current of 200 mA (with diG/dt ≥1 A/µs) is required at 25°C to ensure latching at 1200 mA. For robust operation across –40°C to +135°C, gate pulses should deliver ≥3 V and ≥300 mA with <3 µs delay (tgd) and ≥10 W peak power for 10 ms duration.