Infineon Technologies TD390N18SOFHPSA1

Overview

TD390N18SOFHPSA1 from Infineon Technologies is a phase-control thyristor module designed for high-power AC line switching and rectification in industrial drive systems. It delivers 380 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), operating with electrically insulated baseplate and solder-bond construction for thermal reliability in soft starters and UPS rectifiers.

For engineers reviewing the TD390N18SOFHPSA1 datasheet, TD390N18SOFHPSA1 pinout, TD390N18SOFHPSA1 application, or TD390N18SOFHPSA1 equivalent, key selection criteria include junction-to-case thermal resistance (0.110 K/W), gate trigger current (≤150 mA), critical dv/dt rating (1000 V/µs), and pre-applied TIM option for enhanced heatsink coupling in high-reliability power control designs.

Technical Context

This dual-thyristor module implements a fully controlled, two-arm phase-angle switching topology optimized for sinusoidal conduction angles up to 180°. Its 0.58 mΩ slope resistance (rT) and 0.77 V threshold voltage (VT0) define low-conduction losses under heavy DC-biased loads, while the 100 A/µs diT/dt rating supports fast turn-on in motor-starting transients.

Thermal design relies on validated transient junction-to-case impedance (ZthJC) curves for both sine and rectangular waveforms, with derating applied per conduction angle - e.g., ΔZth increases by 0.020 K/W at Θ = 180° rec versus DC baseline. The 3.0 kV RMS insulation test voltage ensures safety isolation between power terminals and baseplate in grounded-heatsink configurations.

Key Specifications

Pinout & Package

TD390N18SOFHPSA1 uses an industry-standard press-fit power module package with electrically insulated Al₂O₃ ceramic baseplate and 50 mm mounting footprint. Terminal layout follows dual-thyristor configuration: three main power terminals (A1, A2, K common) plus two gate control terminals (G1, G2), all conforming to DIN 46244 A standard for 2.8 × 0.8 mm flat blade connections.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TT390N18SOF and TD390N18KO, TD390N18SOFHPSA1 uniquely combines baseplate insulation, pre-applied TIM, and 380 A ITAVM in a single 50 mm footprint - optimizing thermal performance and system integration for space-constrained industrial UPS and soft starter designs.

Availability

TD390N18SOFHPSA1 is available at Aetrix Electronics and suitable for soft starters, UPS rectifiers, battery chargers, and static switches requiring stable component supply across multi-year production cycles and industrial temperature ranges (-40 °C to +125 °C).

Supply support for TD390N18SOFHPSA1 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.

This part belongs to Infineon's high-power thyristor module product line, engineered specifically for ruggedized industrial AC power control - emphasizing thermal robustness, isolation integrity, and gate drive simplicity in mission-critical energy conversion systems.

FAQ

What is the maximum allowable case temperature for continuous operation?

The maximum case temperature (TC) is +125 °C, derived from the 140 °C maximum junction temperature (Tvj max) and thermal limits defined in the ZthJC curve. At ITAVM = 380 A and Θ = 180°, TC must not exceed 125 °C to maintain safe junction margin - verified via thermal modeling using the published RthJC = 0.110 K/W and ΔZth data.

Does TD390N18SOFHPSA1 require external snubbers in standard 50/60 Hz applications?

No external snubbers are required for standard 50/60 Hz phase-control operation due to its 1000 V/µs (dvD/dt)cr rating and built-in gate protection. However, snubbers are recommended when switching inductive loads with rapid current decay (di/dt > 100 A/µs) or in systems with high stray inductance (>1 µH) to prevent commutation failure.

Can this module be used in anti-parallel configuration for AC switching?

Yes - the dual-thyristor architecture supports anti-parallel connection by wiring A1–K and A2–K as opposing AC terminals, enabling full-wave AC switching in static relays and solid-state contactors. Gate timing must be synchronized with zero-crossing detection to avoid shoot-through, and gate drive isolation is mandatory for each arm.

What torque values are specified for mechanical and electrical terminal mounting?

Mechanical mounting torque is 5 Nm ±15% (M1 screws), and electrical terminal torque is 9 Nm ±15% (M2 screws), both specified for reliable clamping force and low-contact-resistance interfaces. Exceeding these values risks ceramic baseplate cracking or terminal deformation, while under-torque increases thermal resistance and risk of arcing under full-load current.