Infineon Technologies TT320N18SOFHPSA1

Overview

TT320N18SOFHPSA1 from Infineon Technologies is a phase-control thyristor module designed for high-power AC line switching and rectification in industrial drive systems. It delivers 320 A average on-state current (ITAVM) at TC = 85 °C, 1800 V repetitive peak off-state voltage (VDRM/VRRM), and 9500 A non-repetitive surge current (ITSM), enabling robust operation in soft starters and UPS rectifiers.

For engineers reviewing the TT320N18SOFHPSA1 datasheet, TT320N18SOFHPSA1 pinout, TT320N18SOFHPSA1 application, or TT320N18SOFHPSA1 equivalent, key selection criteria include junction-to-case thermal resistance (0.110 K/W), gate trigger current (≤150 mA), threshold voltage (0.77 V), slope resistance (0.58 mΩ), and electrically insulated base plate with pre-applied TIM option.

Technical Context

This dual-thyristor module implements phase-angle control in AC power circuits using gate-triggered conduction. Its 1800 V blocking capability supports 400–690 V AC mains applications, while the 0.58 mΩ slope resistance and 0.77 V threshold voltage define its forward conduction behavior under high RMS load currents up to 520 A.

The module integrates solder-bond interconnect technology and an Al₂O₃-based electrically insulated base plate rated for 3.0 kV RMS insulation test voltage. Thermal design relies on validated transient junction-to-case impedance (ZthJC) models and DC thermal resistance values differentiated by conduction angle (Θ = 30°–180°).

Key Specifications

Pinout & Package

TT320N18SOFHPSA1 is housed in an industry-standard press-pack thyristor module package with electrically insulated Al₂O₃ base plate, 50 mm base plate dimension, and M2 terminal torque specification (9 Nm ±15%). The module contains two anti-parallel thyristor arms sharing common cathode/anode terminals and isolated gate connections.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar phase-control thyristor module applications.

Compared with TD320N18SOF and TT320N18KO, TT320N18SOFHPSA1 provides factory-applied TIM and optimized thermal interface out-of-box, reducing thermal resistance uncertainty and qualification time-critical for time-to-market in industrial drive OEM programs.

Availability

TT320N18SOFHPSA1 is available at Aetrix Electronics and suitable for soft starters, UPS rectifiers, and industrial power controllers requiring stable component supply, long-life thermal performance, and qualified pre-applied TIM integration.

Supply support for TT320N18SOFHPSA1 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 industrial control solutions, with global manufacturing and R&D infrastructure.

This part belongs to Infineon's "Thyristor Modules" product line, engineered specifically for high-reliability AC power control in harsh industrial environments-emphasizing thermal robustness, electrical isolation integrity, and gate drive simplicity.

FAQ

What is the maximum allowable case temperature for continuous operation?

The maximum allowable case temperature (Tc op) is +130 °C, with storage temperature ranging from −40 °C to +130 °C. When operated with pre-applied TIM and proper heatsink mounting, the module sustains 320 A ITAVM at TC = 85 °C, and derating follows a linear 0.154%/K reduction below 25 °C ambient.

Does TT320N18SOFHPSA1 require external snubber circuits?

Snubbers are not mandatory for standard 50/60 Hz phase-control operation due to its 1000 V/µs (dvD/dt)cr rating, but are recommended for high-di/dt loads or frequencies above 400 Hz. The 100 A/µs (diT/dt)cr rating ensures reliable turn-on without oscillation when gate drive rise time is ≤100 ns.

How is gate drive isolation implemented in this module?

Gate terminals G1 and G2 are electrically isolated from main power terminals and base plate per IEC61140 Class 1 basic insulation. Isolation is achieved via internal creepage distance ≥10 mm and reinforced Al₂O₃ substrate, supporting 3.0 kV RMS/1 min dielectric withstand without external optocouplers.

Can TT320N18SOFHPSA1 be used in reverse-conducting configurations?

No-it is a standard phase-control thyristor module with unidirectional conduction per arm. For reverse-conducting operation, a separate anti-parallel diode module or a dedicated reverse-conducting thyristor (RCT) must be used; this device does not integrate freewheeling paths or bidirectional conduction capability.