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

Infineon Technologies D471N85TXPSA1

Name: D471N85TXPSA1
Brand: Infineon Technologies
SKU: D471N85TXPSA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: D471N85TXPSA1

Manufacturer:: Infineon Technologies

Category:: Single Diodes

Package:: DO-200AB, B-PUK

Datasheet:: D471N85TXPSA1.pdf

Description:: DIODE GEN PURP 8.5KV 760A

Quantity:: RFQ Add To RFQ list

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Inventory:9,672

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Product details

Overview

D471N85TXPSA1 from Infineon Technologies is a high-voltage, high-current press-pack rectifier diode designed for medium-voltage drive and pulsed-power systems. It delivers 550 A average forward current at 100 °C case temperature, 9000 V repetitive peak reverse voltage, and 11,000 A non-repetitive surge current with hermetically sealed ceramic packaging and dual-sided cooling capability.

For engineers reviewing the D471N85TXPSA1 datasheet, D471N85TXPSA1 pinout, D471N85TXPSA1 application, or D471N85TXPSA1 equivalent, key selection criteria include junction-to-case thermal resistance (28 K/kW), threshold voltage (1.04 V), slope resistance (1.8 mΩ), clamping force range (10–16 kN), and reverse recovery charge (6 mAs at 1000 V).

Technical Context

This device is a silicon-based, pressure-contact rectifier diode optimized for high-reliability DC-link and line-commutated rectification in industrial power electronics. Its two-sided cooling architecture supports symmetrical heat extraction, and its hermetic ceramic package ensures long-term stability under high mechanical stress and wide ambient temperature ranges (−40 °C to +160 °C).

The diode exhibits low conduction losses (v_F = 3.2 V max at 1200 A) and controlled reverse recovery behavior (Q_r = 6 mAs max, I_RM = 200 A max at 1000 V), enabling robust operation in medium-voltage converters and short-circuit protection circuits where high dI/dt immunity and non-rupture case integrity are critical.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	9000 V - Withstands repetitive reverse voltage up to 9 kV in line-commutated applications without breakdown.
I_FAVM	550 A @ T_C = 100 °C - Sustains continuous DC forward current under industrial heatsink conditions.
I_FSM	11000 A @ t_P = 10 ms - Handles short-circuit energy surges in drive inverters and pulsed-power discharge circuits.
R_thJC	28 K/kW - Enables efficient two-sided thermal management with ≤28 K temperature rise per kW dissipated at junction-to-case interface.
v_T0	1.04 V - Threshold voltage defining linear region onset; used with r_T to model on-state drop across operating current range.
r_T	1.8 mΩ - Slope resistance determining incremental voltage rise beyond threshold; critical for loss calculation at high currents.
Q_r	6 mAs @ V_R = 1000 V - Recovered charge during turn-off; directly impacts snubber sizing and switching loss in phase-controlled rectifiers.
Clamping Force	10–16 kN - Required mechanical compression to maintain low contact resistance and thermal interface integrity in press-pack mounting.

Pinout & Package

Package: Press-pack ceramic housing with dual-sided metal contacts (anode and cathode). Diameter: 58.5 mm; contact diameter: 34 mm; height: 26.9 mm; weight: ~250 g. Hermetically sealed for high-voltage isolation and environmental robustness.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Top)	Forward current entry point	High-current input terminal; requires ≥10 kN clamping force to ensure low-resistance Si-pellet contact and thermal path to heatsink.
Cathode (Bottom)	Forward current exit point	High-current output terminal; symmetrically configured for two-sided cooling and balanced thermal distribution.

Key Features

Feature	Design Value
Full 50/60 Hz blocking over wide temperature range	Stable V_RRM performance from −40 °C to +160 °C junction temperature without derating.
High DC blocking stability	≤50 mA reverse leakage at V_RRM and T_vj = 160 °C ensures minimal standby power loss in HVDC links.
High surge current capability	11,000 A I_FSM enables reliable operation during motor-start transients and fault clearing in drives.
Hermetically sealed ceramic package	Eliminates moisture ingress and partial discharge risk in high-humidity or contaminated industrial environments.
High case non-rupture current	Withstands mechanical stress up to 16 kN clamping force without housing fracture or contact deformation.

Applications

Drive Rectifier

Medium-Voltage Converter

Use Scenario: Line-commutated rectification in AC-fed variable-speed drives for large pumps and compressors.

IC Role / Device Role / Timing Role: Main power conversion element in 6-pulse or 12-pulse thyristor/diode bridges handling multi-kV AC inputs.

Use Value: High V_RRM and I_FAVM enable direct connection to medium-voltage grids (e.g., 6.6 kV) without cascaded stages.

Use Scenario: DC-link rectification in modular multilevel converters (MMC) for renewable energy integration.

IC Role / Device Role / Timing Role: Unidirectional energy transfer from AC grid to DC bus in high-efficiency, high-reliability power conversion systems.

Use Value: Low R_thJC and dual-sided cooling support parallel operation and thermal scalability in stacked converter arms.

Pulsed Power Supply

Short-Circuit Protection

Use Scenario: Energy discharge control in capacitor banks for electromagnetic launchers and laser pulse shaping.

IC Role / Device Role / Timing Role: Fast, high-current freewheeling and recirculation path during rapid capacitor discharge cycles.

Use Value: Controlled Q_r and I_RM minimize voltage overshoot and EMI during abrupt current reversal.

Use Scenario: Crowbar circuit activation in high-power UPS and traction inverters during overcurrent events.

IC Role / Device Role / Timing Role: Low-impedance bypass path that sustains fault current while protecting upstream semiconductors.

Use Value: High I_FSM and non-rupture case integrity allow safe conduction of >10 kA fault currents for defined time windows.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
DD900N16K	1600 V V_RRM, 900 A I_FAVM, TO-247 package - lower voltage rating, higher current, discrete mounting.	Suitable for low-medium voltage (≤1.7 kV) industrial SMPS and welding equipment, not for MV drives.	Select when system voltage < 2 kV and PCB-mounting or single-sided cooling is required.
SKKT 1000/16 E	1600 V V_RRM, 1000 A I_FAVM, press-pack - same mechanical form factor but lower V_RRM and higher I_FAVM.	Used in high-current, lower-voltage traction rectifiers and electrolysis plants where 9 kV blocking is unnecessary.	Choose for cost-sensitive, high-current-only applications where 9 kV rating is excessive.

Compared with DD900N16K and SKKT 1000/16 E, D471N85TXPSA1 uniquely supports 9 kV blocking in press-pack format-enabling direct integration into medium-voltage drive front-ends without series stacking or external grading networks.

Availability

D471N85TXPSA1 is available at Aetrix Electronics and suitable for medium-voltage drives, pulsed-power supplies, and short-circuit protection circuits requiring stable component supply, long-lifecycle assurance, and traceable high-reliability sourcing.

Supply support for D471N85TXPSA1 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, sensor, and automotive ICs, with leadership in high-voltage silicon and wide-bandgap devices.

This part belongs to Infineon's high-power press-pack diode product line, engineered specifically for reliability-critical, high-energy industrial rectification where voltage endurance, thermal robustness, and mechanical integrity are non-negotiable.

FAQ

What is the maximum allowable clamping force for D471N85TXPSA1?

The specified clamping force range is 10–16 kN. Applying less than 10 kN risks insufficient contact pressure, leading to elevated thermal resistance and localized hot spots. Exceeding 16 kN may deform the ceramic housing or damage internal Si-pellet interfaces, compromising long-term reliability and reverse blocking capability.

Can D471N85TXPSA1 be used with single-sided cooling?

Yes, but with significant derating: R_thJC increases to 54.0 K/kW (anode-side) or 58.0 K/kW (cathode-side), reducing maximum sustainable power dissipation by ~45% compared to two-sided cooling. Thermal design must account for asymmetric heat flow and potential junction temperature asymmetry across the die.

What is the significance of the "85" in D471N85TXPSA1?

The "85" denotes the voltage class code corresponding to 8500 V V_RRM (as confirmed in page 2 of the datasheet: V_RRM = 8500 V typical value within 8000–9000 V range). This distinguishes it from variants like D471N80 (8000 V) or D471N90 (9000 V), indicating its position in Infineon's standardized voltage grading system.

How does reverse recovery behavior affect snubber design?

With Q_r = 6 mAs (max) and I_RM = 200 A (max) at 1000 V, the snubber must absorb energy from both stored charge and peak reverse current. A properly sized RC snubber with R ≈ 83 Ω and C ≈ 0.22 µF (per datasheet test condition) limits dv/dt and suppresses voltage overshoot during commutation in phase-controlled rectifiers.

D471N85TXPSA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: DO-200AB, B-PUK

Packaging:: Bulk

Product Status:: Obsolete

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 8500 V

Current - Average Rectified (Io):: 760A

Voltage - Forward (Vf) (Max) @ If:: 3.2 V @ 1200 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 50 mA @ 8500 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Clamp On

Supplier Device Package:: -

Operating Temperature - Junction:: -40°C ~ 160°C

D471N85TXPSA1 FAQ

1.How can I place an order for D471N85TXPSA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for D471N85TXPSA1 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 D471N85TXPSA1 reliable?

The price and inventory of D471N85TXPSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for D471N85TXPSA1 is usually 5 days.

3.What payment methods are accepted for D471N85TXPSA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for D471N85TXPSA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for D471N85TXPSA1?

D471N85TXPSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your D471N85TXPSA1 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 D471N85TXPSA1?

For technical support, including D471N85TXPSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your D471N85TXPSA1 requirements.

6.How does Aetrix verify that D471N85TXPSA1 is sourced from the original manufacturer or authorized distributors?

All D471N85TXPSA1 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 D471N85TXPSA1 meets industry standards.

7.What is the process for return or replacement of D471N85TXPSA1?

All D471N85TXPSA1 units undergo pre-shipment inspection (PSI). If there is an issue with D471N85TXPSA1, 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 D471N85TXPSA1 part is unused and in its original packaging.

Return procedure for D471N85TXPSA1:

1.Submit a request within 90 days.

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

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