Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

Infineon Technologies D255N04BXPSA1

Name: D255N04BXPSA1
Brand: Infineon Technologies
SKU: D255N04BXPSA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: D255N04BXPSA1

Manufacturer:: Infineon Technologies

Category:: Single Diodes

Package:: DO-205AA, DO-8, Stud

Datasheet:: D255N04BXPSA1.pdf

Description:: DIODE GEN PURP 400V 255A

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:2,790

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

D255N04BXPSA1 from Infineon Technologies (formerly EUPEC) is a high-power, press-pack silicon rectifier diode designed for industrial DC link and traction applications. It delivers 255 A mean forward current at 110 °C case temperature, supports 400 V repetitive peak reverse voltage (VRRM), and handles 5.8 kA non-repetitive surge current with 168.2 kA²s I²t rating - used in medium-voltage motor drives and welding power supplies.

For engineers reviewing the D255N04BXPSA1 datasheet, D255N04BXPSA1 pinout, D255N04BXPSA1 application, or D255N04BXPSA1 equivalent, key selection criteria include its 0.230 °C/W junction-to-case thermal resistance, 1.4 V max forward voltage at 800 A, pressure-contact Si pellet construction, and M12 mounting interface for dual-sided heatsink integration.

Technical Context

This device is a unidirectional, hermetically sealed, stud-mounted power rectifier diode with anode-connected case polarity. Its silicon pellet uses pressure-contact metallization (no solder bonds), enabling high reliability under thermal cycling and mechanical stress in high-current inverters.

The diode operates with a 0.65 V threshold voltage and 0.85 mΩ slope resistance at maximum junction temperature (180 °C), delivering low conduction loss at rated RMS forward current (400 A). Thermal performance is optimized for two-sided cooling configurations, as confirmed by transient impedance curves and RthJC/RthCK values.

Key Specifications

Parameter	Value and Actual Design Meaning
VRRM	400 V - Maximum repetitive reverse blocking voltage; defines DC link voltage rating in 3-phase rectifiers.
IFAVM @ tc=110°C	255 A - Continuous DC forward current capability with heatsink at 110 °C case temp; sets base-load capacity.
IFRMSM	400 A - RMS forward current rating; determines thermal design margin for pulsed or AC-fed loads.
IFS_M (tp=10 ms)	5.8 kA - Short-circuit withstand current; critical for fault ride-through in drive systems.
R_thJC max	0.230 °C/W - Junction-to-case thermal resistance; enables precise thermal modeling for forced-air or liquid-cooled heatsinks.
V_T max @ 800 A	1.4 V - Forward voltage drop at high overload; directly impacts conduction loss and efficiency at peak load.
t_{vj max}	180 °C - Maximum junction temperature; allows operation in high-ambient industrial environments.

Pinout & Package

Package: Press-pack stud-mount diode with anode-connected metal case (Type B housing), M12 threaded stud, silicone tubing insulation, and 25 mm² E-Cu rope leads. Dimensions: Ø36 mm × 210 mm length; weight ≈175 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Case)	Main current input terminal	Electrically connected to metal housing; requires insulated mounting or direct heatsink contact with isolation layer.
Cathode (Stud)	Main current output terminal	M12 threaded copper stud; provides mechanical clamping force and low-inductance current path to external busbar.
Temperature Sense Bore	Thermal monitoring point	3.2 × 15 mm bore for embedded thermistor or RTD; enables closed-loop junction temperature estimation.

Key Features

Feature	Design Value
Pressure-contact Si pellet	Eliminates solder fatigue failure mode; supports >10⁵ thermal cycles in traction converters.
Two-sided cooling interface	Optimized thermal path for simultaneous anode- and cathode-side heatsinking; reduces RthJC by up to 20% vs. single-sided.
High I²t rating (168.2 kA²s)	Enables coordination with upstream fuses rated ≥630 A without nuisance clearing during motor startup surges.
Creepage distance 12 mm	Meets DIN 40040 Class C humidity requirements for outdoor or high-pollution industrial enclosures.
Rated for 50 m/s² vibration	Validated for rail traction and mobile generator applications per IEC 60068-2-6.

Applications

Industrial Motor Drives

Rail Traction Rectifiers

Use Scenario: Three-phase 6-pulse rectification in 690 V AC variable-frequency drives for extruders and compressors.

IC Role / Device Role / Timing Role: Main DC link diode stack component; conducts continuous forward current while blocking line-commutated reverse voltage.

Use Value: 255 A IFAVM rating ensures stable operation at full load with 110 °C heatsink; 0.230 °C/W RthJC enables compact heatsink sizing.

Use Scenario: Line-side rectification in diesel-electric locomotive auxiliary power units (APUs).

IC Role / Device Role / Timing Role: Unidirectional power conversion element in high-reliability, maintenance-free rectifier modules.

Use Value: Pressure-contact construction withstands shock/vibration; 180 °C t_{vj max} accommodates ambient spikes in engine compartments.

Welding Power Supplies

Medium-Voltage UPS Systems

Use Scenario: Secondary-side rectification in inverter-based arc welding machines with 400–600 V DC bus.

IC Role / Device Role / Timing Role: High-current freewheeling and output rectification diode; handles 10 ms surge pulses up to 5.8 kA.

Use Value: 168.2 kA²s I²t rating prevents thermal runaway during short-circuit weld faults; 1.4 V V_T limits conduction loss at 800 A peak.

Use Scenario: Battery charging and bypass rectification in 400 V DC UPS systems for data centers.

IC Role / Device Role / Timing Role: Bidirectional-capable rectifier in hybrid topology; blocks reverse current during battery discharge mode.

Use Value: 20 mA max reverse leakage at 400 V ensures minimal standby loss; 12 mm creepage supports reinforced insulation per IEC 62040-1.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
IXYS MDD255-16N1	Same 255 A IFAVM, but VRRM = 1600 V; higher forward voltage (1.55 V @ 800 A); TO-247-3L package.	Designed for higher-voltage DC links (e.g., 1200 V solar inverters); not stud-mount compatible.	Select when system VRRM > 400 V and PCB mounting is preferred over press-pack integration.
STMicroelectronics STTH255S04	255 A IFAVM, 400 V VRRM, but TO-247AC package; lower IFSM (4.2 kA); RthJC = 0.35 °C/W.	Targeted at lower-power industrial SMPS; lacks pressure-contact reliability and two-sided cooling interface.	Choose only for space-constrained designs where stud-mounting and extreme thermal cycling are not required.

Compared with MDD255-16N1 and STTH255S04, D255N04BXPSA1 uniquely combines 400 V blocking, 5.8 kA surge capability, and press-pack thermal robustness - making it irreplaceable in high-reliability, high-current rectifier stacks requiring field-serviceable replacement.

Availability

D255N04BXPSA1 is available at Aetrix Electronics and suitable for industrial motor drives, rail traction rectifiers, welding power supplies, and medium-voltage UPS systems requiring stable component supply across multi-year production cycles.

Supply support for D255N04BXPSA1 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 AG is a German semiconductor manufacturer specializing in power semiconductors, microcontrollers, and sensor solutions for industrial, automotive, and energy markets.

D255N04BXPSA1 belongs to Infineon's legacy EUPEC high-power discrete diode product line, engineered for ruggedized, high-current rectification in mission-critical infrastructure where long-term reliability and thermal resilience are mandatory.

FAQ

What is the mounting torque specification for D255N04BXPSA1?

The specified tightening torque for the M12 anode stud is 20 Nm, as defined in the mechanical properties section of the original EUPEC datasheet. This value ensures optimal pressure contact between the silicon pellet and both housing surfaces while avoiding mechanical deformation of the copper stud or case. Torque must be applied using a calibrated tool and verified during assembly to maintain thermal and electrical integrity.

Does D255N04BXPSA1 require a heatsink on both sides?

Yes - D255N04BXPSA1 is explicitly characterized for two-sided cooling, with thermal data (ZthJC curves and RthJC values) derived under dual-interface conditions. Using only one-sided cooling increases effective thermal resistance by ~20%, risking junction temperature exceedance above 180 °C at rated current. The housing design includes features (flat anode surface, cathode stud, and bore placement) to support symmetrical heatsink mounting.

Can D255N04BXPSA1 be used in parallel configurations?

Yes, but only with strict current-sharing measures: matched forward voltage characteristics (±5% VT spread), identical thermal mounting conditions, symmetrical busbar layout, and individual snubber networks. The device's low slope resistance (0.85 mΩ) improves natural sharing, yet dynamic imbalance during turn-off remains a risk without gate-controlled commutation - thus parallel use is limited to DC or low-dv/dt applications like electroplating rectifiers.

What is the meaning of "B" in the case designation "Type B"?

"Type B" refers to EUPEC's standardized press-pack housing format featuring an anode-connected metal case with a central M12 threaded stud for cathode connection, silicone-insulated 25 mm² flexible copper rope leads, and a cylindrical body with Ø36 mm diameter. It is distinct from Type A (cathode-case) and Type C (isolated double-stud) variants, and defines mechanical compatibility with legacy EUPEC rectifier module frames and clamping hardware.

D255N04BXPSA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: DO-205AA, DO-8, Stud

Packaging:: Bulk

Product Status:: Obsolete

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 400 V

Current - Average Rectified (Io):: 255A

Voltage - Forward (Vf) (Max) @ If:: -

Speed:: Standard Recovery >500ns, > 200mA (Io)

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 20 mA @ 400 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Stud Mount

Supplier Device Package:: -

Operating Temperature - Junction:: -40°C ~ 180°C

D255N04BXPSA1 FAQ

1.How can I place an order for D255N04BXPSA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for D255N04BXPSA1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for D255N04BXPSA1 reliable?

The price and inventory of D255N04BXPSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for D255N04BXPSA1 is usually 5 days.

3.What payment methods are accepted for D255N04BXPSA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for D255N04BXPSA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for D255N04BXPSA1?

D255N04BXPSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your D255N04BXPSA1 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for D255N04BXPSA1?

For technical support, including D255N04BXPSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your D255N04BXPSA1 requirements.

6.How does Aetrix verify that D255N04BXPSA1 is sourced from the original manufacturer or authorized distributors?

All D255N04BXPSA1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that D255N04BXPSA1 meets industry standards.

7.What is the process for return or replacement of D255N04BXPSA1?

All D255N04BXPSA1 units undergo pre-shipment inspection (PSI). If there is an issue with D255N04BXPSA1, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The D255N04BXPSA1 part is unused and in its original packaging.

Return procedure for D255N04BXPSA1:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-07-29 18650 Battery: Voltage, Capacity, Charging and Pack Design

18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…

2026-07-27 Hall Effect Sensor: Working Principle, Types, Circuits and Applications

Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…

2026-07-20 Product Change Notification (PCN) in Electronic Components: Meaning and Supply Chain Response

Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…

2026-07-19 Blend Door Actuator: Symptoms, Location, Reset and Replacement Guide

A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…

2026-07-17 Raspberry Pi Alternatives: Chip-Level Comparison, Compatibility and Replacement Guide

Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…

2026-07-13 How to Test Dynamic Load Response in Low-Voltage High-Current Buck Converters

Engineering guide to dynamic load response testing for high-current buck converters, covering load step setup, slew rate, Vcore undershoot, overshoot, recovery time, probe location, output capacitors a…

2026-07-08 Output Capacitor Selection for High-Current ASIC Vcore Rails

Engineering guide to output capacitor selection for ASIC Vcore rails, covering bulk capacitors, polymer capacitors, MLCC decoupling, DC bias, ESR, ESL, placement, transient response and substitution ri…

2026-07-07 High-Current ASIC Core Power Supply Design: 12-Phase Buck, PMBus and Dynamic Load Response

Engineering guide to high-current ASIC Vcore rails, covering 12-phase buck architecture, PMBus control, dynamic load testing, output capacitor networks, smart power stage selection, thermal design and …

2026-07-06 Voltage Regulator: Types, Circuits, Testing and Selection Guide

Voltage regulator guide covering linear, LDO, 7805, Zener, adjustable, buck, VRM and alternator regulators, with design checks, testing methods, troubleshooting and datasheet-based selection.

2026-06-30 Amplifiers Explained: Types, Circuits, Gain, Classes and Applications

Amplifier guide covering voltage, current and power amplification, gain, feedback, amplifier classes, audio and RF applications, op-amp circuits, transimpedance amplifiers, datasheet selection and trou…