Infineon Technologies TD570N18KOFXPSA1

Overview

TD570N18KOFXPSA1 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 (ITAVM) at TC = 85°C, and 20 kA non-repetitive surge current (ITSM). It employs pressure-contact silicon pellet technology with electrically insulated baseplate and pre-applied thermal interface material (TIM), designed for high-reliability industrial power control in soft starters and UPS rectifiers.

For engineers reviewing the TD570N18KOFXPSA1 datasheet, TD570N18KOFXPSA1 pinout, TD570N18KOFXPSA1 application, or TD570N18KOFXPSA1 equivalent, key selection criteria include junction-to-case thermal resistance (0.055 K/W per module), critical dv/dt rating (1000 V/µs), gate trigger voltage (≤2 V), holding current (≤300 mA), and isolation test voltage (3.6 kV RMS/1 sec).

Technical Context

This thyristor module implements a dual-arm, anti-parallel configuration optimized for line-commutated AC phase control. Its pressure-contact construction eliminates wire bonds and solder layers, enabling robust thermal cycling performance and stable RthJC (0.055 K/W) under DC and 180° conduction angle conditions.

The device features a threshold voltage (VT0) of 0.8 V and slope resistance (rT) of 0.3 mΩ, supporting low conduction losses up to 1050 A RMS (ITRMSM). Gate drive requirements are defined by IGT ≤ 250 mA and VGT ≤ 2 V at 12 V anode-cathode voltage, with critical di/dt capability of 200 A/µs and turn-off time tq ≈ 250 µs under specified commutation conditions.

Key Specifications

Pinout & Package

TD570N18KOFXPSA1 is housed in an industrial-standard press-pack module with electrically insulated baseplate (AlN ceramic), 60 mm baseplate dimension, and M1 mechanical mounting (6 Nm torque). Terminal layout follows dual-arm configuration: two main AC terminals (T1/T2 per arm), two isolated gate terminals (G/K per arm), and baseplate as thermal reference.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TT570N18KOF and TD570N16KOF, TD570N18KOFXPSA1 provides factory-applied TIM and guaranteed AlN baseplate insulation-reducing thermal interface variability and eliminating external isolation hardware-while maintaining full 1800 V blocking and 566 A ITAVM capability for demanding industrial phase control.

Availability

TD570N18KOFXPSA1 is available at Aetrix Electronics and suitable for soft starters, UPS rectifiers, crowbar protection circuits, and static bypass switches requiring stable component supply across multi-year industrial equipment lifecycles.

Supply support for TD570N18KOFXPSA1 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 markets.

This part belongs to Infineon's High-Power Thyristor Module product line, engineered for ruggedized, high-current AC power control in mission-critical industrial drives, power conditioning, and grid-tied systems.

FAQ

What is the maximum allowable junction temperature for TD570N18KOFXPSA1?

The maximum junction temperature (Tvj max) is 125°C, as specified in the Infineon technical information document revision 3.1. This value defines the upper thermal limit for safe operation and must be maintained via proper heatsink design using the given RthJC (0.055 K/W) and system-level RthCA values. Exceeding this temperature risks irreversible degradation of the silicon die and pressure-contact interface.

Does TD570N18KOFXPSA1 require external snubber circuits?

Yes - due to its high (dvD/dt)cr rating of 1000 V/µs, external RC snubbers are required to suppress voltage transients exceeding this threshold during commutation. The datasheet specifies that failure to limit dv/dt below this value may cause false triggering. Snubber design must account for worst-case line voltage, stray inductance, and expected di/dt during turn-off.

Can TD570N18KOFXPSA1 be used in single-phase versus three-phase configurations?

Yes - the dual-arm architecture supports both configurations: as a back-to-back pair in single-phase AC control (e.g., soft starters), or as two arms within a six-pulse (B6) three-phase bridge (e.g., UPS rectifiers). Each arm operates independently, and the module's 1800 V VDRM rating ensures compatibility with 400–690 VAC three-phase systems when properly configured with appropriate line reactors and filtering.

What is the meaning of "XPSA1" in the full part number TD570N18KOFXPSA1?

Per Infineon's short-form catalog and DMX code structure, "XPSA1" denotes a specific manufacturing variant: "XP" indicates pre-applied thermal interface material, "S" signifies electrically insulated baseplate (AlN), "A1" identifies the internal production order and datecode format (2021–2022 production window). This suffix distinguishes it from base variants like TT570N18KOF which lack these factory-installed features.