Infineon Technologies T430N12TOFXPSA1

Overview

T430N12TOFXPSA1 from Infineon Technologies is a high-power phase-control thyristor designed for industrial AC power regulation in line-commutated converters, motor drives, and static VAR compensators. It delivers 433 A average on-state current at 85 °C case temperature, 1200 V repetitive peak off-state voltage (V_DRM/V_RRM), and withstands 5200 A non-repetitive surge current (10 ms). Its 150 A/µs critical di/dt rating supports fast gate-triggered turn-on in high-inductance loads.

For engineers reviewing the T430N12TOFXPSA1 datasheet, T430N12TOFXPSA1 pinout, T430N12TOFXPSA1 application, or T430N12TOFXPSA1 equivalent, key selection criteria include junction-to-case thermal resistance (0.051 °C/W two-sided), gate trigger current ≤200 mA, holding current ≤300 mA, and commutated turn-off time of 250 µs - all critical for reliable forced-commutation and thermal management in medium-voltage rectifier stacks.

Technical Context

This thyristor operates as a bidirectional, gate-controlled, line-commutated switch in half- or full-wave AC phase control topologies. Its 125 °C maximum junction temperature, 0.9 mΩ slope resistance, and 0.85 V threshold voltage define conduction efficiency under high RMS currents up to 970 A. The device requires precise gate pulse timing (≤3 µs delay) and robust dv/dt immunity (1000 V/µs) to prevent false triggering in noisy industrial environments.

Thermal design relies on pressure-contact silicon pellet construction with clamping force of 4–8 kN and dual-sided heatsinking. Transient thermal impedance modeling (Z_thJC) is provided for both sinusoidal and rectangular current waveforms across conduction angles from 30° to 180°, enabling accurate loss and temperature prediction in real-world duty cycles.

Key Specifications

Pinout & Package

Package: TO-240AA (isolated press-pack thyristor with dual-sided cooling interface, 70 g mass, 6 mm creepage distance, clamping force 4–8 kN).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TT140N12KOF and T430N14TOFXPSA1, the T430N12TOFXPSA1 provides optimal balance of di/dt robustness (150 A/µs), low conduction loss (0.9 mΩ), and compact thermal resistance (0.051 °C/W), making it preferred for high-dynamic-response, space-constrained industrial converters operating at standard 690 VAC line voltage.

Availability

T430N12TOFXPSA1 is available at Aetrix Electronics and suitable for industrial motor drives, medium-voltage rectifier stacks, and static VAR compensators requiring stable component supply, long-lifecycle support, and traceable sourcing for OEM production programs.

Supply support for T430N12TOFXPSA1 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 microcontrollers, and industrial sensors, with global manufacturing and R&D centers.

This thyristor belongs to Infineon's "Netz-Thyristor" product line, engineered specifically for high-reliability, high-power AC phase control in industrial energy conversion systems - emphasizing thermal robustness, surge immunity, and gate drive simplicity.

FAQ

What is the maximum allowable case temperature for continuous operation?

The T430N12TOFXPSA1 supports continuous operation with case temperature (T_C) up to +125 °C, as defined by its storage temperature range (-40 °C to +150 °C) and maximum junction temperature (T_vj max = 125 °C). At T_C = 85 °C, it delivers 433 A average on-state current; derating curves show linear reduction to 620 A at T_C = 55 °C for 180° sinusoidal conduction.

Does this thyristor require a heat sink, and what clamping force is needed?

Yes - the TO-240AA package mandates mechanical clamping to heatsinks on both anode and cathode sides. The datasheet specifies a clamping force of 4–8 kN to ensure low thermal resistance (0.051 °C/W) and reliable electrical contact. Insufficient force increases R_thJC, risking thermal runaway under high RMS current.

Can the auxiliary cathode terminal be left unconnected?

No - the auxiliary cathode (terminal 5) must be connected to the main cathode or gate driver reference ground. It provides a low-impedance local return path for gate current, suppressing noise-induced false triggering. Leaving it floating degrades dv/dt immunity and may cause erratic turn-on behavior in high-noise industrial environments.

What gate drive parameters ensure reliable turn-on without overstressing the device?

Reliable turn-on requires a gate pulse with peak current ≥1 A, di/dt ≥1 A/µs, duration ≥20 µs, and amplitude ≤2 V (V_GT max). Peak gate power must stay within limits: e.g., 100 W for 0.5 ms. Exceeding P_GM ratings risks gate metallization damage, while insufficient di/dt causes non-uniform conduction and localized heating.