Infineon Technologies TT570N18KOFXPSA1

Overview

TT570N18KOFXPSA1 from Infineon Technologies is a press-pack, double-sided cooled phase-control thyristor module rated for 1800 V repetitive peak off-state voltage (VDRM/VRRM), 566 A average on-state current at TC = 85°C (ITAVM), and 20 kA non-repetitive surge current (ITSM). It features electrically insulated baseplate, pressure-contact silicon die construction, and 0.055 K/W junction-to-case thermal resistance per arm - deployed in industrial soft starters and UPS rectifiers.

For engineers reviewing the TT570N18KOFXPSA1 datasheet, TT570N18KOFXPSA1 pinout, TT570N18KOFXPSA1 application, or TT570N18KOFXPSA1 equivalent, key selection criteria include validated surge capability (20 kA @ 10 ms), low conduction loss (VT0 ≤ 0.8 V, rT ≤ 0.3 mΩ), thermal interface readiness (pre-applied TIM option), and isolation rating (3.6 kV RMS/1 sec).

Technical Context

This thyristor module implements a dual-arm, anti-parallel configuration optimized for line-commutated AC power control. Its pressure-contact die assembly enables high-current handling without wire bonds, while the AlN-based insulated baseplate supports Class I safety isolation and direct mounting to liquid-cooled heatsinks.

It operates with gate trigger current ≤ 250 mA and voltage ≤ 2 V under standard conditions, and sustains critical dv/dt up to 1000 V/µs and di/dt up to 200 A/µs - enabling robust commutation in six-pulse bridge (B6) and two-pulse bridge (B2) rectifier topologies with conduction angles down to 30°.

Key Specifications

Pinout & Package

TT570N18KOFXPSA1 uses a press-pack, double-sided cooled industrial module package with isolated copper baseplate (60 mm × 60 mm footprint), rated for M2 terminal torque (12 Nm) and M1 mounting torque (6 Nm). Electrical terminals are DIN 46244 A-type (2.8 × 0.8 mm flat blade), with three main terminals per arm: Anode (A), Cathode (K), and Gate (G).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TD570N18KOF and TT690N18KOF, TT570N18KOFXPSA1 provides optimal balance of dual-arm integration, 566 A continuous rating, and compact 60 mm × 60 mm footprint - making it ideal for space-constrained soft starter and UPS rectifier modules where paired switching and thermal efficiency are jointly prioritized.

Availability

TT570N18KOFXPSA1 is available at Aetrix Electronics and suitable for soft starters, UPS rectifiers, crowbar protection circuits, and static bypass switches requiring stable component supply, long-life field operation, and traceable industrial-grade sourcing.

Supply support for TT570N18KOFXPSA1 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 systems.

TT570N18KOFXPSA1 belongs to Infineon's high-power thyristor module product line, engineered specifically for ruggedized, line-commutated AC power control in mission-critical industrial drive and power conversion equipment.

FAQ

What is the maximum allowable junction temperature for TT570N18KOFXPSA1?

The maximum junction temperature (Tvj max) is 125°C, as specified in the Infineon technical information document revision 3.1. This limit applies under all operating conditions including surge events. Thermal design must ensure that instantaneous junction temperature - calculated as TC + (Pcond + Psw) × RthJC - remains below this value, with derating applied for elevated case temperatures or reduced conduction angles.

Does TT570N18KOFXPSA1 require forced cooling?

Yes - sustained operation at ITAVM = 566 A requires active cooling. At TC = 85°C, the module dissipates ~420 W per arm (based on VT0 = 0.8 V and rT = 0.3 mΩ). Passive heatsinking is insufficient; liquid-cooled or high-velocity forced-air systems with RthCA ≤ 0.15 K/W are recommended, especially in B6 rectifier configurations with 180° conduction.

Can TT570N18KOFXPSA1 be used in asymmetrical half-wave configurations?

No - TT570N18KOFXPSA1 is a dual-arm, anti-parallel thyristor module designed exclusively for full-wave AC control. Its internal layout integrates two matched thyristors with shared thermal and electrical reference planes. Asymmetrical operation would unbalance thermal loading and violate the specified RthJC rating, risking premature failure.

Is pre-applied thermal interface material (TIM) standard or optional on TT570N18KOFXPSA1?

Pre-applied TIM is an optional factory configuration, indicated by the "XPSA1" suffix in the full part number. Units without this suffix (e.g., TT570N18KOF) ship with bare copper baseplate. When ordered with XPSA1, a uniform, cured silicone-based TIM layer is factory-applied, verified per Infineon's process control and qualified for 10,000 thermal cycles between −40°C and +125°C.