Infineon Technologies D950N22TXPSA1

Overview

D950N22TXPSA1 from Infineon Technologies is a high-power, press-pack silicon rectifier diode designed for industrial AC/DC conversion in medium-voltage drive systems and traction applications. It delivers 950 A average on-state current at TC = 100 °C, supports 2200 V repetitive peak reverse voltage (VRRM), and handles 12.8 kA surge current (IFSM) at tP = 10 ms - enabling robust operation in 3-phase thyristor-controlled rectifiers for rolling stock and HVDC converters.

For engineers reviewing the D950N22TXPSA1 datasheet, D950N22TXPSA1 pinout, D950N22TXPSA1 application, or D950N22TXPSA1 equivalent, this device requires attention to clamping force (6–12 kN), two-sided heatsink mounting, thermal resistance (RthJC ≤ 0.045 °C/W), and its non-isolated, dual-terminal pressure-contact construction for high-current busbar integration.

Technical Context

This rectifier diode operates as a unidirectional, non-controlled power switching element in line-commutated converter topologies. Its on-state characteristic follows vF = A + B·iF + C·ln(iF) + D·iF² with coefficients A=0.563, B=3.66×10⁻⁴, C=3.066×10⁻³, D=9.626×10⁻³ at Tvj max, enabling precise conduction loss modeling up to 4 kA.

Thermal performance is defined by transient junction-to-case impedance ZthJC, varying with cooling configuration: two-sided cooling yields lowest thermal resistance (0.045 °C/W max), while anode- or cathode-sided cooling increases RthJC to 0.081–0.092 °C/W. The device's 180 °C maximum junction temperature supports continuous operation under high ambient and overload conditions.

Key Specifications

Pinout & Package

Package: Press-pack, double-sided cooled, non-isolated, stud-type housing with anode and cathode metal terminals. Requires external heatsinks mounted on both sides and precise mechanical clamping.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-power rectifier diode applications.

Compared with DD950N22K and SKKH 91/22, D950N22TXPSA1 offers superior thermal performance (0.045 °C/W vs. ≥0.12 °C/W), higher surge rating (12.8 kA vs. ≤11.5 kA), and verified I²t coordination data - making it optimal for space-constrained, high-reliability traction and HVDC applications requiring minimal thermal margin.

Availability

D950N22TXPSA1 is available at Aetrix Electronics and suitable for railway traction rectifiers, industrial medium-voltage drives, HVDC converter valves, and grid-scale energy storage inverters requiring stable component supply across multi-year production programs.

Supply support for D950N22TXPSA1 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 quality certification to ISO/TS 16949 and IECQ QC 080000.

This device belongs to Infineon's "High Power Diodes" product line, engineered specifically for line-commutated converter applications demanding ultra-high current, voltage, and thermal robustness in rail, energy, and heavy industry.

FAQ

What is the recommended clamping force for D950N22TXPSA1 installation?

The datasheet specifies a mandatory clamping force of 6–12 kN applied evenly across the anode and cathode terminals during heatsink mounting. Insufficient force increases contact resistance and thermal impedance, risking localized overheating and premature failure. Torque-controlled hydraulic presses or calibrated torque tools are required - standard bolt tightening is insufficient.

Can D950N22TXPSA1 be used in single-sided cooling configurations?

Yes, but with significant derating: RthJC rises to 0.081–0.092 °C/W depending on whether cooling is applied to the anode or cathode side only. At 950 A IFAVM, this increases junction temperature rise by ~40 °C versus two-sided cooling, requiring ambient or heatsink temperature reduction to maintain Tvj ≤ 180 °C.

Does D950N22TXPSA1 have a specified reverse recovery time (trr)?

No - as a standard (non-fast) rectifier diode, it does not specify trr. Instead, it provides recovered charge Qr (e.g., 100 µAs at 100 A, -di/dt = 100 A/µs), which is the relevant parameter for snubber design and commutation loss calculation in line-commutated circuits.

Is D950N22TXPSA1 RoHS-compliant and halogen-free?

Per Infineon's official product compliance documentation (Pub ID: PCN-2019-0027), D950N22TXPSA1 meets RoHS Directive 2011/65/EU and is certified halogen-free (IEC 61249-2-21), with no exemptions applied. Material declarations and test reports are available upon request for qualifying customers.