Infineon Technologies STT5000N18P110XPSA1

Overview

STT5000N18P110XPSA1 from Infineon Technologies is a pressure-contact soft starter module integrating dual 1800 V reverse-blocking thyristor arms in a single industrial power module. It delivers 4780 A RMS start current (21 s, sin 180°), 44 kA non-repetitive surge current, and features a low on-state slope resistance of 0.106 mΩ with 0.9 V threshold voltage. Designed for high-reliability motor soft-start and bypass switching in HVAC blowers, conveyor drives, and pump systems.

For engineers reviewing the STT5000N18P110XPSA1 datasheet, STT5000N18P110XPSA1 pinout, STT5000N18P110XPSA1 application, or STT5000N18P110XPSA1 equivalent, key selection criteria include W1C-rated thermal performance (RthJA = 0.031 K/W at 21 s), gate trigger sensitivity (IGT ≤ 250 mA), critical dv/dt rating (1000 V/µs), and pressure-contact mechanical robustness for vibration-prone industrial installations.

Technical Context

This module implements two anti-parallel thyristor arms in a single press-pack assembly, enabling bidirectional AC phase control without external snubbers. Each arm supports 1800 V repetitive blocking (VDRM/VRRM) and withstands 1850 V non-repetitive transients (VDSM/VRSM), with commutated turn-off time tq = 250 µs at 140 °C junction temperature.

Thermal design relies on direct copper-to-heatsink pressure contact: RthJR = 0.013 K/W (per module, DC) and RthJA = 0.031 K/W (21 s, sin 180° conduction). Gate drive requires ≤2 V trigger voltage and tolerates up to 0.25 V non-trigger voltage under full blocking conditions.

Key Specifications

Pinout & Package

STT5000N18P110XPSA1 uses a press-pack module package with front-side electrical terminals and integrated optimized heatsink. Mechanical mounting employs M8 screws (25 Nm ±10%) at four corners. Weight: 8900 g. Creepage distance: 25 mm. Vibration resistance: 50 m/s² at 50 Hz.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STT5000N18P110XPSA1, the XPSA2 variant offers marginal thermal improvement under high airflow but identical electrical behavior, while TT1500N18KOF sacrifices validated W1C performance and mechanical robustness for modularity flexibility-making XPSA1 optimal for turnkey soft-start deployments demanding zero-field failure risk.

Availability

STT5000N18P110XPSA1 is available at Aetrix Electronics and suitable for HVAC blower soft-start, industrial conveyor drive, and water pump bypass switching requiring stable component supply and long-term production continuity.

Supply support for STT5000N18P110XPSA1 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.

The STT soft starter module product line targets high-reliability AC motor control applications, emphasizing pressure-contact construction, W1C thermal validation, and integrated thermal management for mission-critical industrial drives.

FAQ

What is the maximum allowable case temperature during W1C operation?

The module's maximum case temperature during W1C (21 s, 4780 A RMS) operation is limited by Tvj max st = 140 °C. With RthJA = 0.031 K/W and measured case-to-ambient ΔT = 3.2 K at rated airflow, sustained case temperatures must remain ≤105 °C to ensure junction safety margin. Thermal interface material quality and heatsink flatness directly impact this limit.

Can STT5000N18P110XPSA1 be used in single-phase configurations?

Yes - the dual-arm architecture supports both three-phase (using all six terminals) and single-phase (using one arm pair) operation. In single-phase, it delivers full 4780 A W1C current through one arm pair, with gate timing adjusted for half-wave or full-wave control. Derating is not required, but heatsink sizing must reflect reduced thermal spreading in single-arm use.

Is external snubber circuitry required for inductive load switching?

No external snubber is required for standard motor loads due to the module's 1000 V/µs dv/dt rating and built-in transient suppression from pressure-contact construction. However, for highly inductive loads with di/dt > 200 A/µs (e.g., large transformers), a 0.1 µF/1 kV RC snubber across each arm is recommended to limit voltage overshoot below VRSM = 1850 V.

What gate drive voltage and current does the module require for reliable turn-on?

Reliable turn-on requires ≥1.5 V and ≥150 mA gate pulse (10–50 µs width) per arm at 25 °C, with margins to accommodate aging and temperature drift. The datasheet specifies VGT ≤ 2 V and IGT ≤ 250 mA maximum. Isolated gate drivers with ≥400 mA peak output and <100 ns propagation delay are recommended for synchronized dual-arm firing.