Infineon Technologies STT2200N18P55XPSA2

Overview

STT2200N18P55XPSA2 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 blocking voltage (VDRM/VRRM), 2180 A 21-second overload current, and 21 kA 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 bypass switching applications.

For engineers reviewing the STT2200N18P55XPSA2 datasheet, STT2200N18P55XPSA2 pinout, STT2200N18P55XPSA2 application, or STT2200N18P55XPSA2 equivalent, key selection criteria include verified 21 s overload capability, junction-to-ambient thermal resistance of 0.082 K/W (21 s), gate trigger current ≤200 mA, critical dv/dt rating of 1000 V/µs, and pressure-contact construction enabling high-cycle reliability in static power control systems.

Technical Context

This module implements a dual-arm, anti-parallel thyristor configuration using Advanced Medium Power Technology (AMPT) and pressure-contact die attachment to ensure low parasitic inductance and stable thermal performance under high-current transients. Its design supports forced-air-cooled operation with validated transient thermal impedance profiles for both junction-to-reference (ZthJR) and junction-to-ambient (ZthJA) paths.

The device operates with gate-controlled turn-on and natural commutation, requiring precise gate pulse timing (tgd ≤3 µs) and sustaining critical di/dt (250 A/µs) and dv/dt (1000 V/µs) ratings to prevent false triggering or commutation failure during motor start-up sequences.

Key Specifications

Pinout & Package

STT2200N18P55XPSA2 uses a pressure-contact, double-sided cooled module package with isolated copper baseplate. Electrical terminals are M6 screw connections (torque: 10 Nm ±10%) for main power (A1/K1, A2/K2) and DIN 46244 A 2.8×0.8 flat contacts for gate control (G1, K1, G2, K2).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar thyristor-based soft starter applications.

Compared with STT2200N18P55XPSA2, the SA1 variant offers tighter thermal specs per arm but lacks dual-arm validation, while the KOF version trades integrated cooling for mechanical flexibility-both require revalidation of overload derating and gate drive timing margins.

Availability

STT2200N18P55XPSA2 is available at Aetrix Electronics and suitable for motor soft starters, static bypass switches, industrial power controllers, and static transfer switches requiring stable component supply and long-term production continuity.

Supply support for STT2200N18P55XPSA2 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.

This part belongs to Infineon's High-Power Thyristor Module product line, engineered specifically for medium-voltage AC power control in soft-start, static switching, and phase-angle regulation applications up to 2.2 MW.

FAQ

What gate drive voltage and current are required to reliably trigger STT2200N18P55XPSA2?

The module requires a gate trigger current ≤200 mA and gate trigger voltage ≤2 V at 25°C with 12 V anode-cathode voltage. Gate pulses must exceed 1 A peak for latching (IL ≤1200 mA), and minimum pulse width is 20 µs. Gate non-trigger voltage is limited to 0.2 V at 0.5×VDRM to prevent false turn-on.

Can STT2200N18P55XPSA2 be used in single-phase or three-phase configurations?

Yes-it is configured as a dual anti-parallel thyristor arm, making it suitable for single-phase AC control. For three-phase systems, three modules are used-one per phase-with independent gate control. The pressure-contact baseplate supports direct mounting to liquid-cooled cold plates in multi-phase stacks.

What is the maximum allowable case temperature during continuous operation?

The module's specified operating case temperature range is –40°C to +125°C. At full 2180 A overload for 21 s, junction temperature reaches 155°C (Tvj max st), requiring case temperature ≤105°C under forced-air cooling (vLuft = 3.6 m/s) to maintain thermal margin per RthJA(21 s) = 0.082 K/W.

How does the pressure-contact construction affect long-term reliability compared to soldered modules?

Pressure-contact eliminates thermomechanical fatigue from CTE mismatch between silicon, solder, and copper, increasing thermal cycle lifetime by ≥3× versus solder-bonded equivalents. It also removes void formation risk, ensuring stable rT and VT0 over >100,000 start-stop cycles in soft-start duty.