Infineon Technologies D450S20TXPSA1

Overview

D450S20TXPSA1 from Infineon Technologies is a 2000 V repetitive peak reverse voltage, 1050 A RMS on-state fast recovery diode in a press-pack package with dual-sided cooling capability, designed for high-power industrial rectification and traction converter applications requiring low forward voltage (2.25 V max at 1.2 kA) and fast switching (trr = 6.2 µs).

For engineers reviewing the D450S20TXPSA1 datasheet, D450S20TXPSA1 pinout, D450S20TXPSA1 application, or D450S20TXPSA1 equivalent, key selection criteria include surge current rating (5600 A @ 10 ms), junction-to-case thermal resistance (0.057 °C/W two-sided), reverse recovery charge (650 µAs), and clamping force specification (3.2–7.6 kN).

Technical Context

This fast recovery diode employs a silicon pressure-contact pellet structure optimized for high-current, high-voltage DC link and line-commutated rectifier circuits. Its design targets low conduction losses (V_F ≤ 2.25 V at 1.2 kA, r_T = 0.9 mΩ) and controlled switching behavior (t_fr = 4.2 µs, t_rr = 6.2 µs, Q_r = 650 µAs) under harsh thermal conditions up to T_vj = 150 °C.

Thermal performance is defined by transient junction-to-case impedance models for anode-, cathode-, and dual-sided cooling configurations, enabling accurate thermal simulation in forced-air or liquid-cooled power modules. The device operates within a storage and case temperature range of –25 °C to +180 °C and requires precise mechanical clamping (3.2–7.6 kN) to maintain specified R_thJC.

Key Specifications

Pinout & Package

The D450S20TXPSA1 uses a double-sided cooled press-pack package with two external terminals: Anode (Terminal 1) and Cathode (Terminal 2). Mechanical mounting requires uniform clamping force (3.2–7.6 kN) across both copper contact surfaces to ensure specified thermal and electrical performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fast recovery diode applications.

Compared with MDD550-20 and 5SDD20H4500, D450S20TXPSA1 delivers superior thermal efficiency (0.057 °C/W), lower conduction loss (2.25 V), and faster recovery (6.2 µs/650 µAs), making it optimal for space-constrained, high-efficiency traction and industrial rectifiers where thermal headroom and switching fidelity are critical.

Availability

D450S20TXPSA1 is available at Aetrix Electronics and suitable for railway traction rectifiers, industrial medium-voltage drives, and grid-scale STATCOM converters requiring stable component supply, long-term lifecycle support, and traceable sourcing for safety-critical deployments.

Supply support for D450S20TXPSA1 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.

The D450S series belongs to Infineon's high-power press-pack diode product line, engineered specifically for line-commutated and resonant converter topologies in traction, renewable energy, and heavy industrial equipment.

FAQ

What is the recommended clamping force for D450S20TXPSA1 installation?

The datasheet specifies a mechanical clamping force range of 3.2–7.6 kN applied uniformly across both anode and cathode contact surfaces. Deviation below 3.2 kN risks elevated R_thJC and premature thermal runaway; exceeding 7.6 kN may deform internal silicon pellet or housing, degrading V_F and t_rr consistency.

Can D450S20TXPSA1 be used in single-sided cooled configurations?

Yes, but with significant derating: R_thJC increases to 0.094 °C/W (anode-cooled) or 0.134 °C/W (cathode-cooled), reducing maximum I_FRMS to approximately 700 A and 500 A respectively at T_c = 100 °C. Dual-sided cooling is mandatory to achieve rated 1050 A performance.

Does D450S20TXPSA1 meet AEC-Q101 or automotive qualification standards?

No - D450S20TXPSA1 is not AEC-Q101 qualified. It is designed for industrial and traction applications per Infineon's IFBIP D AEC standard (a proprietary internal reliability protocol for power devices), which includes extended temperature cycling and high-current surge testing but does not align with automotive qualification requirements.

How does the 650 µAs reverse recovery charge impact snubber design?

At 410 A peak forward current and –di/dt = 50 A/µs, the 650 µAs Q_r translates to a peak reverse recovery current I_RM of 123 A. This value directly determines the minimum snubber capacitor value (C ≥ Q_r/V_clamp) and resistor power rating needed to limit dv/dt-induced turn-on in adjacent SCRs or IGBTs.