Infineon Technologies STT2200N18P55XPSA1

Overview

STT2200N18P55XPSA1 from Infineon Technologies is a pressure-contact soft starter module integrating two anti-parallel thyristor arms in a single housing, rated for 1800 V repetitive peak off-state voltage (VDRM/VRRM), 2180 A 21-second overload current, and 21,000 A non-repetitive surge current (ITSM). It features an integrated optimized heatsink, 0.24 mΩ slope resistance (rT), and 0.9 V threshold voltage (VT0), designed for industrial motor soft-start and static switching applications.

For engineers reviewing the STT2200N18P55XPSA1 datasheet, STT2200N18P55XPSA1 pinout, STT2200N18P55XPSA1 application, or STT2200N18P55XPSA1 equivalent, key selection criteria include verified 21s overload capability, junction-to-ambient thermal resistance of 0.082 K/W (21s), gate trigger current ≤200 mA, critical dv/dt rating of 1000 V/µs, and pressure-contact construction for high-cycle reliability in heavy-duty AC power control.

Technical Context

This module implements a dual-arm, anti-parallel thyristor configuration enabling bidirectional AC conduction without external reverse-blocking components. Its pressure-contact die attachment ensures low parasitic inductance and stable thermal performance under repetitive high-current transients.

It operates with gate-controlled turn-on and natural commutation at current zero-crossing, supporting phase-angle control for smooth motor acceleration. The 250 µs typical circuit commutated turn-off time (tq) and 250 A/µs critical di/dt rating define its safe commutation envelope in 50/60 Hz mains applications.

Key Specifications

Pinout & Package

STT2200N18P55XPSA1 uses a pressure-contact, double-sided cooled module package with isolated copper baseplate. Electrical terminals are M6 screw connections for main power (anode/cathode pairs per arm) and DIN 46244 A-style 2.8 × 0.8 mm flat tabs for gate control inputs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar soft starter module applications.

Compared with STT2200N18P55XPSA1, the SA2 variant offers identical performance with enhanced batch traceability, while the TT2200N18P55XPSA1 is a legacy marking-both require no schematic or layout changes but differ in supply chain documentation and lifecycle status.

Availability

STT2200N18P55XPSA1 is available at Aetrix Electronics and suitable for motor soft starters, static transfer switches, and industrial power controllers requiring stable component supply, long-term manufacturability, and certified thermal performance under sustained overload conditions.

Supply support for STT2200N18P55XPSA1 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 AG is a German semiconductor manufacturer specializing in power electronics, automotive microcontrollers, and security solutions, with global R&D and manufacturing infrastructure.

This part belongs to Infineon's Soft Starter Module (SSM) product line, engineered specifically for high-reliability, medium-power AC motor control and static switching in harsh industrial environments where pressure-contact robustness and thermal predictability are critical.

FAQ

What is the maximum allowable case temperature during continuous operation?

The STT2200N18P55XPSA1 has a specified operating case temperature range of –40 °C to +125 °C. At full 2180 A overload for 21 s, the junction temperature must not exceed 155 °C, requiring heatsink design that maintains case temperature ≤105 °C under worst-case ambient and airflow conditions per RthJA = 0.082 K/W.

Can this module be used in DC applications?

No. STT2200N18P55XPSA1 is a thyristor-based AC device relying on natural commutation at current zero-crossing. It lacks forced commutation circuitry and cannot sustain conduction in pure DC; attempting DC operation will cause latch-up and catastrophic failure due to inability to turn off.

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

A minimum gate trigger voltage of 2 V and current of 200 mA is required at 25 °C (VGT ≤ 2 V, IGT ≤ 200 mA). Gate pulses must be ≥20 µs wide with diG/dt ≥1 A/µs. At –40 °C, gate energy must increase by ~25% to ensure latching current (IL ≤ 1200 mA) is exceeded.

Is isolation between power terminals and gate terminals certified to industrial standards?

Yes. The module meets IEC 60747-6 for isolation: creepage distance is 6.3 mm, and the gate-cathode insulation withstands 3.75 kV RMS for 60 s. This qualifies it for use in reinforced insulation systems up to 1000 VAC working voltage in motor drive inverters and soft starters.