Infineon Technologies STT1900N16P55XPSA1

Overview

STT1900N16P55XPSA1 from Infineon Technologies is a pressure-contact soft starter module integrating two anti-parallel thyristor arms in a single housing, rated for 1600 V repetitive blocking voltage (VDRM/VRRM), 1900 A 21-second overload current, and 17,000 A non-repetitive surge current (ITSM). It features an integrated optimized heatsink and Advanced Medium Power Technology (AMPT) for industrial motor soft-starting applications.

For engineers reviewing the STT1900N16P55XPSA1 datasheet, STT1900N16P55XPSA1 pinout, STT1900N16P55XPSA1 application, or STT1900N16P55XPSA1 equivalent, key selection criteria include its 0.28 mΩ slope resistance (rT), 0.9 V threshold voltage (VT0), 0.084 K/W junction-to-ambient thermal resistance (RthJA), gate trigger current ≤200 mA, and 125 °C maximum junction temperature.

Technical Context

This module implements a dual-arm, anti-parallel thyristor configuration with pressure-contact die attachment for high-current commutation reliability. Its design supports line-frequency (50/60 Hz) phase-controlled conduction with critical di/dt rating of 250 A/µs and dv/dt capability of 1000 V/µs under full blocking conditions.

Thermal performance is defined by transient junction-to-reference (RthJR) and junction-to-ambient (RthJA) impedances, both specified for 21 s overload duty cycle. The integrated heatsink enables direct mounting to system cold plates, with mechanical terminals rated for M6 torque (10 Nm ±10%) and creepage distance of 6.3 mm.

Key Specifications

Pinout & Package

STT1900N16P55XPSA1 uses a pressure-contact, double-sided cooled module package with isolated copper baseplate. Electrical terminals are M6 screw connections for main power (anode/cathode per arm); control terminals conform to DIN 46244 A (2.8 × 0.8 mm flat blade).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STT1900N16P55XPSA1, the STT1600N16P55XPSA1 offers cost and size reduction at the expense of 16% lower overload headroom, while the STT2200N16P55XPSA1 extends safe operating area for higher inertia loads-both retain identical gate drive compatibility and mechanical footprint.

Availability

STT1900N16P55XPSA1 is available at Aetrix Electronics and suitable for motor soft starters, bypass switches, static power controllers, and industrial heating systems requiring stable component supply and long-term production continuity.

Supply support for STT1900N16P55XPSA1 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 Soft Starter Module product line, engineered specifically for high-reliability, medium-power AC motor control and industrial power switching applications using pressure-contact thyristor technology.

FAQ

What is the maximum allowable gate trigger voltage for STT1900N16P55XPSA1?

The maximum gate trigger voltage (VGT) is 2 V at Tvj = 25°C, vD = 12 V, and iGM = 1 A. Exceeding this value risks gate oxide damage or premature aging. Gate drive circuits must limit peak voltage to ≤2 V with fast fall time (<1 µs) to avoid overstress during turn-off transitions.

Can STT1900N16P55XPSA1 be used in single-phase applications?

Yes-it is designed for single-phase AC line control with anti-parallel thyristor arms enabling full-wave conduction. Its 1600 V VDRM rating supports 1000 VAC systems (e.g., 690 VAC + safety margin), and the 1900 A overload rating covers typical single-phase motor inrush profiles up to 15 kW.

What is the recommended heatsink mounting torque for this module?

The module uses M6 screw terminals for main power connections, not heatsink mounting. For cold-plate interface, Infineon specifies uniform clamping force across the baseplate surface-no torque value applies. Mechanical mounting relies on external frame pressure (≥0.5 MPa) and thermal interface material (TIM) with ≤0.1 mm thickness and ≤0.2 K·cm²/W resistance.

Does STT1900N16P55XPSA1 require snubber circuits?

Snubbers are recommended for inductive loads with high stored energy (e.g., large motors or transformers) due to its 1000 V/µs dv/dt rating. A RC snubber (e.g., 100 Ω + 0.1 µF) across each arm limits voltage overshoot during commutation, preventing false turn-on. Resistive loads typically do not require snubbers.