Infineon Technologies STT5000N14P110XPSA1

Overview

STT5000N14P110XPSA1 from Infineon Technologies is a pressure-contact soft starter module integrating dual 1400 V reverse-blocking thyristor arms in a single package, rated for 4780 A RMS W1C start current (21 s), 44 kA non-repetitive surge current (ITSM), and 0.106 mΩ slope resistance. It serves as a high-power static switch in industrial motor soft-start systems requiring controlled voltage ramp-up and bypass switching.

For engineers reviewing the STT5000N14P110XPSA1 datasheet, STT5000N14P110XPSA1 pinout, STT5000N14P110XPSA1 application, or STT5000N14P110XPSA1 equivalent, key selection criteria include verified W1C-rated current capability, junction-to-ambient thermal resistance under 21 s duty (RthJA ≤ 0.031 K/W), gate trigger threshold (VGT ≤ 2 V), and pressure-contact mechanical reliability for high-cycle industrial operation.

Technical Context

This module implements two anti-parallel thyristor arms in a single press-pack assembly, enabling bidirectional AC conduction without external series/parallel stacking. Each arm supports 1400 V repetitive blocking (VDRM/VRRM) and withstands 1450 V non-repetitive transients (VDSM/VRSM), with critical dv/dt rating of 1000 V/µs and di/dt capability of 200 A/µs.

Thermal design centers on direct copper-to-heatsink pressure contact: junction-to-reference-point resistance is 0.013 K/W per arm (DC), and transient thermal impedance ZthJA at 21 s is modeled analytically for airflow velocities of 2 m/s and 5 m/s, supporting precise thermal margining in forced-air-cooled enclosures.

Key Specifications

Pinout & Package

STT5000N14P110XPSA1 uses a press-pack module housing with isolated electrical terminals and integrated heatsink interface. Mechanical mounting employs M8 screws (25 Nm torque ±10%) at front and rear flanges. Electrical connections are via flat and round gate terminals (AMP 60598 compatible) and main A/K power terminals (2.8×0.5 mm and 4.8×0.5 mm cross-sections).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STT5000N14P110XPSA1, the XPSA2 variant offers identical performance with enhanced traceability, while the TT5000N14P110 provides functionally equivalent operation with a negligible thermal penalty-making both viable for drop-in replacement where documentation or sourcing constraints apply.

Availability

STT5000N14P110XPSA1 is available at Aetrix Electronics and suitable for industrial motor soft starters, static bypass switches, high-power heating controllers, and medium-voltage AC power regulators requiring stable component supply across multi-year production programs.

Supply support for STT5000N14P110XPSA1 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 automotive, industrial, and energy markets.

This part belongs to Infineon's sTT soft starter thyristor module product line, engineered specifically for high-reliability, high-current AC motor control and static switching in harsh industrial environments.

FAQ

What is the maximum allowable junction temperature during start-up?

The maximum junction temperature after start (Tvj max st) is 140 °C, applicable when vR/vD remains below 80% of VRRM/VDRM. This elevated limit accommodates the 21 s W1C start duty cycle and is validated under specified thermal boundary conditions (e.g., heatsink baseplate ≤ 85 °C at t = 0). Continuous operation must remain within the 125 °C absolute maximum.

Does STT5000N14P110XPSA1 require external snubber circuits?

Snubbers are not required for standard motor soft-start applications due to the module's 1000 V/µs critical dv/dt rating and built-in commutation robustness. However, snubbers may be needed in highly inductive loads with fast voltage transients exceeding this rating or when operating near VDRM limits with poor layout inductance control.

How is gate drive isolation implemented for dual-arm control?

Each thyristor arm has physically separate gate terminals (flat and round), allowing independent opto-isolated gate drivers with dedicated current-limiting resistors. The module does not integrate isolation; designers must use discrete isolated gate drivers (e.g., Infineon 1ED020I12-F2) referenced to respective cathode potentials to ensure proper dv/dt immunity and timing synchronization.

What mechanical torque specification applies to the main power terminals?

The main power terminals (A and K) are designed for M8 screw connections with a nominal tightening torque of 25 Nm, toleranced at ±10%. This value ensures optimal pressure contact between the silicon pellet and copper baseplate while avoiding deformation of the press-pack housing or terminal lugs. Torque must be applied using calibrated tools and verified per Infineon's assembly guidelines.