Infineon Technologies STT800N16P55XPSA1

Overview

STT800N16P55XPSA1 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 peak off-state voltage (VDRM/VRRM), 800 A overload current (21 s), and 6300 A non-repetitive surge current (ITSM). It features an integrated optimized heatsink, Advanced Medium Power Technology (AMPT), and is designed for industrial motor soft-start applications requiring high reliability and thermal robustness.

For engineers reviewing the STT800N16P55XPSA1 datasheet, STT800N16P55XPSA1 pinout, STT800N16P55XPSA1 application, or STT800N16P55XPSA1 equivalent, key selection criteria include its 0.83 mΩ slope resistance, 0.9 V threshold voltage, 250 µs circuit commutated turn-off time, and RthJA(21s) of 0.196 K/W - all critical for thermal design and transient overload handling in static switching systems.

Technical Context

This module implements a dual-arm, anti-parallel thyristor configuration with pressure-contact Si-pellet interconnection, enabling high-current bidirectional conduction without external paralleling. Its gate trigger characteristics (IGT ≤ 200 mA, VGT ≤ 2 V) and critical dv/dt rating (1000 V/µs) support robust firing control in noisy industrial environments.

Thermal performance is defined by junction-to-reference (RthJR(21s) ≤ 0.172 K/W per arm) and junction-to-ambient (RthJA(21s) ≤ 0.196 K/W per arm) resistances under sinusoidal 180° conduction, validated for continuous operation up to Tvj = 125 °C and short-term peaks to 155 °C after start.

Key Specifications

Pinout & Package

STT800N16P55XPSA1 uses a pressure-contact, dual-arm module package with integrated heatsink (case type: see Infineon Annex, page 4). Electrical terminals are M6 screw connections for main power (T1/T2 per arm), and DIN 46244 A-style 2.8 × 0.8 mm flat terminals for gate control (G/K per arm).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STT800N16P55XPSA1, the STT1000N16P55XPSA1 extends overload headroom while maintaining drop-in mechanical compatibility, whereas the TT1000N16KOF trades integration for field-serviceable cooling - making the former ideal for scalable OEM designs and the latter suited for high-reliability retrofit installations.

Availability

STT800N16P55XPSA1 is available at Aetrix Electronics and suitable for motor soft starters, static bypass switches, and industrial power controllers requiring stable component supply, long-life thermal reliability, and certified compliance with IEC 61800-5-1 and UL 508.

Supply support for STT800N16P55XPSA1 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 electronics, automotive ICs, and security solutions, with global manufacturing and R&D centers across Europe, Asia, and the Americas.

The STTxxxN16P55XPSA1 series belongs to Infineon's high-power thyristor module product line, engineered specifically for industrial motor control and static switching applications demanding high surge robustness, pressure-contact reliability, and integrated thermal management.

FAQ

What is the maximum allowable gate trigger pulse width for STT800N16P55XPSA1?

The maximum rated peak gate power dissipation curve (PGM = f(tg)) specifies four operating points: 40 W for 10 ms, 80 W for 1 ms, 100 W for 0.5 ms, and 150 W for 0.1 ms. For reliable triggering without gate damage, pulse width must be limited to ≤0.5 ms when applying ≥100 W, and gate current must remain ≤200 mA under 12 V gate drive conditions per the datasheet's IGT max specification.

Can STT800N16P55XPSA1 be used in single-phase applications?

Yes - the dual-arm anti-parallel configuration supports both single-phase and three-phase AC topologies. In single-phase use, it functions as a full-wave AC switch with independent gate control of each arm, enabling phase-angle control across the entire 0–360° range. Thermal derating must follow RthJA(21s) = 0.196 K/W per arm, and gate drive isolation must comply with IEC 61800-5-1 creepage (6.3 mm) requirements.

What is the recommended terminal torque for main power connections?

The specified terminal connection torque for M6 main power terminals is 10 Nm, with a tolerance of ±10%. This value ensures optimal pressure-contact integrity between the copper busbar and module's internal Si-pellet interface, minimizing contact resistance rise and preventing thermal runaway under 800 A overload conditions. Torque must be applied using a calibrated tool and verified during final assembly.

Does STT800N16P55XPSA1 require forced cooling?

No - the integrated optimized heatsink enables natural convection operation up to 350 A RMS at 40 °C ambient, per Infineon's thermal characterization. Forced air (vLuft = 3.6 m/s) extends capability to full 800 A overload rating. Heatsink surface temperature must be monitored; operation above 125 °C case temperature violates the Tc op limit and risks accelerated parameter drift or latch-up failure.