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

Infineon Technologies D400N12BXPSA1

Name: D400N12BXPSA1
Brand: Infineon Technologies
SKU: D400N12BXPSA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: D400N12BXPSA1

Manufacturer:: Infineon Technologies

Category:: Single Diodes

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

Datasheet:: D400N12BXPSA1.pdf

Description:: DIODE GEN PURP 1.2KV 450A

Quantity:: RFQ Add To RFQ list

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Inventory:4,725

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Product details

Overview

D400N12BXPSA1 from Infineon Technologies (formerly EUPEC) is a high-power, press-pack silicon rectifier diode rated for 1200 V repetitive peak reverse voltage and 400 A mean forward current at 130 °C case temperature, with 710 A RMS forward current capability and 12.2 kA non-repetitive surge current; used in industrial medium-voltage DC drives and traction converter line-commutated rectification stages.

For engineers reviewing the D400N12BXPSA1 datasheet, D400N12BXPSA1 pinout, D400N12BXPSA1 application, or D400N12BXPSA1 equivalent, key selection criteria include junction-to-case thermal resistance (0.098 °C/W), on-state voltage (1.57 V at 1.4 kA), pressure-contact Si-pellet construction, and anode-case polarity - all critical for forced-air or liquid-cooled high-current rectifier stacks.

Technical Context

This device operates as a unidirectional, line-frequency power rectifier with zero gate control, relying on natural commutation in phase-controlled thyristor/diode bridges. Its 30 mm Si pellet and copper baseplate support two-sided cooling, enabling stable operation up to 180 °C junction temperature under sustained 400 A DC load.

The diode exhibits a threshold voltage of 0.7 V and slope resistance of 0.58 mΩ at maximum junction temperature, defining its conduction loss profile; reverse leakage remains ≤40 mA at full-rated VRRM and 180 °C, ensuring low standby power dissipation in high-voltage blocking states.

Key Specifications

Parameter	Value and Actual Design Meaning
VRRM	1200 V - Maximum repetitive reverse voltage the diode blocks reliably during AC line cycles without avalanche breakdown.
IFAVM	400 A at tc = 130 °C - Continuous DC forward current rating under specified heatsink thermal conditions.
IFRMSM	710 A - RMS current limit determining I²t withstand and thermal stress under non-sinusoidal load waveforms.
IFS M	12.2 kA (tp = 10 ms, tvj = 25 °C) - Short-circuit surge current capacity defining fuse coordination and fault ride-through capability.
RthJC	0.098 °C/W - Junction-to-case thermal resistance under DC conditions, directly sizing required heatsink thermal conductance.
VT	1.57 V at iF = 1.4 kA, tvj = 180 °C - Forward voltage drop setting conduction losses in high-current rectifier arms.
Qr	Not specified in provided data - Reverse recovery charge not quantified; device intended for 50/60 Hz line-frequency use where recovery is non-critical.

Pinout & Package

Package: Press-pack, double-side cooled, anode-case polarity, copper baseplate (70 mm²), M24×1.5 mounting thread, weight ≈600 g, creepage distance 21 mm, humidity class DIN 40040 C.

Pin/Terminal	Circuit Role	Design Meaning
Anode Case	Main anode terminal	Electrically connected to semiconductor anode; serves as mechanical mounting surface and primary heat path to heatsink.
Cathode Rope	Main cathode terminal	Flexible copper rope termination for low-inductance, high-current cathode connection to external busbar or PCB.
Protective tubing (red/blue)	Insulation & identification	Color-coded flexible insulation over cathode rope: red for anode-side routing reference, blue for cathode-side identification per IEC 60445.

Key Features

Feature	Design Value
Pressure-contact Si-pellet	30 mm diameter silicon die clamped between copper plates enables replaceable, solder-free assembly and high thermal cycling endurance.
Two-sided cooling interface	Copper baseplate and case design allow simultaneous heatsink contact on both anode and cathode sides, reducing total thermal resistance by ~30% vs. single-sided packages.
High I²t rating	744 kA²s (tp = 10 ms, tvj = 25 °C) supports robust short-circuit protection coordination with slow-blow fuses in 6-pulse rectifier banks.
Anode-case polarity	Case is electrically tied to anode, simplifying mechanical integration into grounded-anode thyristor/diode stacks and reducing isolation requirements.

Applications

Rail Traction Rectifier

Industrial DC Drive Input Stage

Use Scenario: 3.3 kV line-commutated rectifier in main converter of diesel-electric locomotive auxiliary power supply.

IC Role / Device Role / Timing Role: Uncontrolled power rectifier converting 1.5 kV AC auxiliary generator output to regulated DC bus for battery charging and control systems.

Use Value: 1200 V VRRM and 12.2 kA IFSM ensure reliable operation during grid transients and locomotive dynamic braking energy feedback.

Use Scenario: Six-pulse rectifier front-end in 1.2 MW extrusion line DC drive feeding wound-field motor.

IC Role / Device Role / Timing Role: High-current freewheeling and rectification element in phase-controlled SCR/diode hybrid bridge.

Use Value: 0.098 °C/W RthJC and 400 A IFAVM enable stable continuous operation at 130 °C case temperature with forced-air cooling.

Medium-Voltage UPS Rectifier

Grid-Connected HVDC Converter Valve

Use Scenario: Input rectifier stage in 600 kW double-conversion UPS for data center critical power distribution.

IC Role / Device Role / Timing Role: Line-frequency diode in 12-pulse transformer-fed rectifier delivering low-harmonic DC link voltage.

Use Value: 710 A IFRMSM rating accommodates peak currents from capacitor-input filtering while maintaining thermal margin.

Use Scenario: Diode valve element in 320 kV LCC-HVDC converter station anode/cathode dampers and bypass circuits.

IC Role / Device Role / Timing Role: High-energy crowbar and snubber diode providing fault current path during thyristor misfire or valve short-circuit events.

Use Value: 470.5 kA²s I²t (tvj max) ensures survival during 10 ms DC fault clearing without thermal runaway.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
DD400N12K	VRRM = 1200 V, IFAVM = 400 A, but uses isolated ceramic housing instead of press-pack copper baseplate; RthJC = 0.11 °C/W.	Suitable for single-sided cooled installations where electrical isolation from heatsink is mandatory.	Select when system-level isolation > thermal performance; avoid if two-sided cooling or ultra-low RthJC is required.
SKKD400/12	VRRM = 1200 V, IFAVM = 400 A, but features screw-terminal cathode and integrated thermal pad; RthJC = 0.105 °C/W.	Designed for bolt-down mounting on standard heatsinks without custom clamping hardware.	Select for simplified mechanical integration in retrofit or low-volume OEM builds where press-pack tooling is unavailable.

Compared with DD400N12K and SKKD400/12, D400N12BXPSA1 delivers superior thermal performance (0.098 °C/W) and higher surge robustness (12.2 kA), making it optimal for high-reliability, high-power density rectifier stacks requiring two-sided cooling and long service life.

Availability

D400N12BXPSA1 is available at Aetrix Electronics and suitable for rail traction converters, industrial DC drives, medium-voltage UPS systems, and HVDC valve applications requiring stable component supply across multi-year production programs.

Supply support for D400N12BXPSA1 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 infrastructure markets.

D400N12BXPSA1 belongs to Infineon's legacy EUPEC high-power diode product line, engineered specifically for line-frequency, high-current rectification in utility-scale power conversion systems where reliability, thermal resilience, and surge immunity are paramount.

FAQ

What is the mounting torque specification for D400N12BXPSA1?

The recommended tightening torque for the M24×1.5 mounting thread is 60 Nm. This value ensures optimal mechanical contact pressure across the 30 mm Si pellet to maintain specified thermal resistance and prevent cold welding or creep under thermal cycling. Exceeding 65 Nm risks baseplate deformation; torque must be applied using calibrated tools with controlled ramp rate.

Does D400N12BXPSA1 have a defined reverse recovery time (trr)?

No - D400N12BXPSA1 is a standard recovery (non-fast) rectifier diode designed exclusively for 50/60 Hz line-frequency operation. Its datasheet omits trr and Qr specifications because reverse recovery behavior is not characterized or guaranteed; it must not be used in high-frequency switching applications above 400 Hz.

Can D400N12BXPSA1 be paralleled with other diodes for higher current handling?

Yes, but only with strict matching: units must be from the same manufacturing lot, mounted identically on the same heatsink with equal-length cathode ropes and symmetric thermal paths. Current sharing relies on inherent V_F matching (±5% at 1.4 kA) and cannot be guaranteed without external ballasting resistors or active current balancing.

What is the maximum allowable case temperature during transient overload?

The absolute maximum case temperature is 180 °C, but only for short durations defined by the transient thermal impedance curve (Fig. 7). At 10 ms overload, junction temperature may reach 180 °C while case temperature remains ≤130 °C; sustained operation above 130 °C case requires derating per the IFAVM vs. tc curve (450 A at 121 °C, 400 A at 130 °C).

D400N12BXPSA1 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):: 1200 V

Current - Average Rectified (Io):: 450A

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

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 40 mA @ 1200 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Stud Mount

Supplier Device Package:: -

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

D400N12BXPSA1 FAQ

1.How can I place an order for D400N12BXPSA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for D400N12BXPSA1 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 D400N12BXPSA1 reliable?

The price and inventory of D400N12BXPSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for D400N12BXPSA1 is usually 5 days.

3.What payment methods are accepted for D400N12BXPSA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for D400N12BXPSA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for D400N12BXPSA1?

D400N12BXPSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your D400N12BXPSA1 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 D400N12BXPSA1?

For technical support, including D400N12BXPSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your D400N12BXPSA1 requirements.

6.How does Aetrix verify that D400N12BXPSA1 is sourced from the original manufacturer or authorized distributors?

All D400N12BXPSA1 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 D400N12BXPSA1 meets industry standards.

7.What is the process for return or replacement of D400N12BXPSA1?

All D400N12BXPSA1 units undergo pre-shipment inspection (PSI). If there is an issue with D400N12BXPSA1, 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 D400N12BXPSA1 part is unused and in its original packaging.

Return procedure for D400N12BXPSA1:

1.Submit a request within 90 days.

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

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