Infineon Technologies D1301SH45TXPSA1

Overview

D1301SH45TXPSA1 from Infineon Technologies is a press-pack, stud-mounted, fast-recovery, hard-driving diode designed for high-power medium-voltage converter freewheeling and snubber applications. It delivers 4500 V repetitive peak reverse voltage (VRRM), 1350 A average forward current at TC = 85 °C (IFAVM), and 28 kA non-repetitive surge current (IFSM), with soft turn-off behavior at di/dt up to 5000 A/µs - deployed in IGCT- and IGBT-based traction and industrial drive inverters.

For engineers reviewing the D1301SH45TXPSA1 datasheet, D1301SH45TXPSA1 pinout, D1301SH45TXPSA1 application, or D1301SH45TXPSA1 equivalent, key selection criteria include clamping force range (36–52 kN), two-sided thermal resistance (RthJC = 7.5 K/kW), junction temperature limit (Tvj max = 140 °C), and soft recovery performance (FRRS = 1.6) under high-di/dt switching.

Technical Context

This diode operates as a unidirectional, pressure-contact, silicon power rectifier with no gate control or integrated protection circuitry. Its design centers on robust transient thermal impedance (ZthJC), low slope resistance (rT = 0.994 mΩ), and controlled reverse recovery softness (FRRS = 1.6) to minimize voltage overshoot and EMI during forced commutation in high-current, high-voltage converters.

It supports DC blocking stability up to 2800 V (VR(D)) and exhibits a typical forward voltage of 4.0 V at 2500 A and Tvj max, with peak forward recovery voltage (VFRM) limited to 250 V under 5000 A/µs diF/dt - critical for minimizing snubber losses in pulsed-power and medium-voltage drive systems.

Key Specifications

Pinout & Package

Package: Press-pack, double-sided cooled, stud-mounted, ceramic-insulated housing with anode and cathode metal terminals. Diameter: 121 mm; contact diameter: 86 mm; height: 26 mm; weight: ~1350 g.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage, high-current freewheeling diode applications.

Compared with MDD1300-45 and 5SDF13H4502, D1301SH45TXPSA1 offers balanced softness (FRRS = 1.6), industry-standard clamping force range (36–52 kN), and proven field reliability in multi-MW medium-voltage converters - making it optimal for new industrial drive platforms where thermal predictability and EMI control are prioritized.

Availability

D1301SH45TXPSA1 is available at Aetrix Electronics and suitable for medium-voltage converters, IGCT freewheeling circuits, and pulsed power systems requiring stable component supply, long-term lifecycle assurance, and traceable sourcing from original manufacturer stock.

Supply support for D1301SH45TXPSA1 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 company specializing in power electronics, automotive microcontrollers, and security ICs, with global manufacturing and R&D infrastructure.

This part belongs to Infineon's high-power discrete diode portfolio, engineered specifically for ruggedized, high-reliability operation in industrial medium-voltage drives, renewable energy converters, and pulsed-power infrastructure.

FAQ

What is the recommended clamping force range for D1301SH45TXPSA1 installation?

The specified clamping force is 36–52 kN, applied uniformly across the anode and cathode surfaces using calibrated torque tools and hardened steel washers. Exceeding 52 kN risks ceramic housing fracture, while forces below 36 kN increase contact resistance and thermal impedance, risking premature thermal runaway at rated current.

Does D1301SH45TXPSA1 require a heatsink, and what cooling configuration is supported?

Yes - it requires external heatsinking with two-sided cooling (anode + cathode) to achieve the rated RthJC of 7.5 K/kW. Single-sided cooling raises RthJC to 13.3–17.2 K/kW and reduces IFAVM by ≥25%. Thermal interface material must be electrically insulating and rated for >140 °C continuous operation.

How does the soft recovery characteristic (FRRS = 1.6) impact snubber design?

FRRS = 1.6 indicates a gradual tail current decay, reducing peak reverse recovery current (IRM = 3600 A) and limiting VFRM to 250 V at 5000 A/µs. This allows reduction of RC snubber size by ~40% compared to standard fast diodes, lowering losses and PCB space in high-frequency converter topologies.

Can D1301SH45TXPSA1 be paralleled with other diodes for higher current handling?

Parallel operation is not recommended without active current-sharing control due to inherent forward voltage mismatch (vF tolerance ±0.3 V). Even with matched batches, thermal coupling differences cause current imbalance >15% at full load. For >1350 A applications, use a single higher-rated device or redesign the converter topology with modular stacks.