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

Infineon Technologies D1821SH45TPRXPSA1

Name: D1821SH45TPRXPSA1
Brand: Infineon Technologies
SKU: D1821SH45TPRXPSA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: D1821SH45TPRXPSA1

Manufacturer:: Infineon Technologies

Category:: Single Diodes

Package:: DO-200AE

Datasheet:: D1821SH45TPRXPSA1.pdf

Description:: DIODE GEN PURP 4.5KV 2210A

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Product details

Overview

D1821SH45TPRXPSA1 from Infineon Technologies is a press-pack, stud-mounted, ultra-high-voltage fast recovery diode designed for medium-voltage converter freewheeling and snubber applications. It delivers V_RRM = 4500 V, I_FAVM = 1710 A (T_C = 85 °C), I_FSM = 40 kA (10 ms), V_T0 = 1.54 V, and r_T = 0.825 mΩ - enabling robust operation in IGCT/IGBT-based high-power inverters.

For engineers reviewing the D1821SH45TPRXPSA1 datasheet, D1821SH45TPRXPSA1 pinout, D1821SH45TPRXPSA1 application, or D1821SH45TPRXPSA1 equivalent, key selection criteria include clamping force range (53–96 kN), two-sided thermal resistance (R_thJC = 5.6 K/kW), soft turn-off behavior at di/dt up to 5000 A/µs, and 140 °C maximum junction temperature.

Technical Context

This diode employs a silicon pressure-contact pellet structure with double-sided cooling capability and is rated for continuous DC blocking stability up to 2800 V reverse voltage. Its soft recovery behavior (FRRS typ., t.b.d.) and low Q_r = 7 mAs support reduced EMI and lower switching losses in high-di/dt hard-switching environments.

The device operates across T_j = –40 °C to +140 °C and features transient thermal impedance Z_thJC characterized by seven analytical RC elements for accurate thermal modeling. Clamping force tolerance (53–96 kN) ensures consistent contact resistance and thermal performance under mechanical assembly variation.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	4500 V - supports DC-link voltages up to 3000 V in 2-level medium-voltage converters with 1.5× safety margin.
I_FAVM	1710 A @ T_C = 85 °C - defines continuous forward current rating under standard heatsink conditions.
I_FSM	40000 A @ 10 ms - enables reliable short-circuit handling in IGBT/IGCT-based traction and industrial drives.
V_T0 / r_T	1.54 V / 0.825 mΩ - threshold voltage and slope resistance determine conduction loss profile at high currents.
R_thJC	5.6 K/kW (two-sided) - quantifies thermal path efficiency from junction to heatsink surface under symmetric cooling.
Q_r	7 mAs - recovered charge directly impacts turn-off loss and snubber sizing in high-frequency switching.
FRRS	t.b.d. (typ.) - reverse recovery softness factor governs voltage overshoot and stress on commutating switches.

Pinout & Package

Package: Press-pack, stud-mounted, double-sided cooled, 121 mm diameter, 26 mm height, 86 mm contact diameter, 1580 g mass. Requires controlled clamping force of 53–96 kN for optimal thermal and electrical contact.

Pin/Terminal	Circuit Role	Design Meaning
Anode (stud)	High-current forward conduction terminal	Mechanically integrated stud serves as primary current path and thermal interface to heatsink side A.
Cathode (stud)	High-current return terminal	Opposite-side stud completes current loop and provides second thermal interface for two-sided cooling.

Key Features

Feature	Design Value
Full 50/60 Hz blocking over wide temperature range	Enables stable operation in grid-tied converters without derating across –40 °C to +140 °C junction temperature.
Soft turn-off behavior at high di/dt	Reduces voltage overshoot and EMI during forced commutation in IGCT-based systems with di/dt ≥ 5000 A/µs.
High case non-rupture current	Withstands 40 kA surge without mechanical failure, critical for fault ride-through in medium-voltage drives.
Two-sided thermal interface	Allows symmetrical heat extraction via both anode and cathode studs, lowering effective R_thJC to 5.6 K/kW.
DC blocking stability	Guarantees 2800 V continuous reverse voltage capability with λ < 100 FIT, supporting long-life HVDC snubbers.

Applications

Medium Voltage Converters

IGCT Freewheeling Diodes

Use Scenario: 3.3 kV–4.16 kV three-level NPC converters for wind turbine full-scale converters and marine propulsion drives.

IC Role / Device Role / Timing Role: Main freewheeling path during IGBT/IGCT commutation, absorbing reactive energy from motor windings.

Use Value: Soft recovery and 40 kA I_FSM prevent voltage spikes and ensure fault clearance without snubber capacitor overdesign.

Use Scenario: Gate-commutated thyristor (IGCT) based static VAR compensators (SVCs) in utility substations.

IC Role / Device Role / Timing Role: Reverse-conducting path during IGCT turn-off, providing low-loss, high-reliability current transfer.

Use Value: 140 °C T_vjmax and 5.6 K/kW R_thJC sustain >98% availability in unattended grid infrastructure.

IGBT Freewheeling Diodes

Pulsed Power Systems

Use Scenario: High-power UPS and industrial servo drives using 3.3 kV IGBT modules in six-pulse rectifier/inverter topologies.

IC Role / Device Role / Timing Role: Bidirectional current path during regenerative braking and inductive load flyback.

Use Value: 1710 A I_FAVM and 0.825 mΩ r_T minimize conduction loss and thermal cycling stress over 20+ year service life.

Use Scenario: Capacitor discharge circuits in electromagnetic launchers, laser pulse modulators, and fusion research coil drivers.

IC Role / Device Role / Timing Role: High-current, low-Q_r switch for repetitive high-energy pulse shaping and polarity reversal.

Use Value: 7 mAs Q_r and 180 V V_FRM at 4000 A enable precise pulse edge control with minimal tail current distortion.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage, high-current freewheeling diode applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
DD900S45K3C	V_RRM = 4500 V, I_FAVM = 1800 A, R_thJC = 5.2 K/kW, but uses solder-bonded ceramic package instead of press-pack.	Requires brazed mounting and vacuum reflow; unsuitable for field-replaceable press-pack assemblies.	Select when board-level integration and automated assembly are prioritized over field serviceability.
SKKH 105/45	V_RRM = 4500 V, I_FAVM = 1050 A, R_thJC = 6.8 K/kW, single-sided cooling only, lower I_FSM (25 kA).	Limited to lower-power converters or asymmetric cooling layouts where dual-stud mounting is impractical.	Select when footprint constraints prohibit 121 mm diameter or when system-level derating allows lower surge rating.

Compared with DD900S45K3C and SKKH 105/45, D1821SH45TPRXPSA1 offers superior field-serviceability via press-pack design, higher surge robustness (40 kA vs. 25–32 kA), and optimized two-sided thermal management - making it preferred for mission-critical medium-voltage drive rebuilds and retrofit programs.

Availability

D1821SH45TPRXPSA1 is available at Aetrix Electronics and suitable for medium voltage converters, IGCT freewheeling circuits, and pulsed power systems requiring stable component supply, long-lifecycle support, and traceable high-reliability sourcing.

Supply support for D1821SH45TPRXPSA1 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 part belongs to Infineon's "High Power Diodes" product line, engineered specifically for high-voltage, high-current industrial power conversion - emphasizing thermal reliability, surge resilience, and mechanical robustness in harsh operating environments.

FAQ

What is the recommended clamping force range for D1821SH45TPRXPSA1 installation?

The datasheet specifies a mandatory clamping force range of 53–96 kN to ensure uniform contact pressure across the 86 mm contact diameter. Under-torque risks increased thermal resistance and localized hot spots; over-torque may deform the copper housing or damage internal Si pellet bonding. Use calibrated hydraulic tools and follow Infineon's torque sequence per Application Note AN2015-09.

Does D1821SH45TPRXPSA1 support single-sided cooling?

Yes - though optimized for two-sided cooling (R_thJC = 5.6 K/kW), it supports anode-only or cathode-only cooling with derated R_thJC values of 9.95 K/kW and 12.85 K/kW respectively. Derating curves for I_FAVM under single-sided conditions are provided in Figure 6 of the datasheet revision 2.7.

What is the maximum allowable di/dt during turn-off for reliable soft recovery?

The device demonstrates soft turn-off behavior up to –di/dt = 5000 A/µs at I_FM = 4500 A and V_DC = 3000 V, as validated in the PRQ and Q_r test conditions. Exceeding this rate increases V_FRM nonlinearly; measured peak forward recovery voltage reaches 180 V at 5000 A/µs, rising to ~240 V at 7000 A/µs per extrapolated curve in Figure 7.

Is D1821SH45TPRXPSA1 RoHS-compliant and halogen-free?

Yes - Infineon confirms full RoHS compliance (2011/65/EU) and halogen-free status per IEC 61249-2-21. The press-pack housing contains no leaded solder or brominated flame retardants; material declarations (DMX code traceability) and substance data sheets are available upon request through Aetrix's technical support portal.

D1821SH45TPRXPSA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: DO-200AE

Packaging:: Tray

Product Status:: Obsolete

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 4500 V

Current - Average Rectified (Io):: 2210A

Voltage - Forward (Vf) (Max) @ If:: 3.6 V @ 2500 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 150 mA @ 4500 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Chassis Mount

Supplier Device Package:: -

Operating Temperature - Junction:: 0°C ~ 140°C

D1821SH45TPRXPSA1 FAQ

1.How can I place an order for D1821SH45TPRXPSA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for D1821SH45TPRXPSA1 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 D1821SH45TPRXPSA1 reliable?

The price and inventory of D1821SH45TPRXPSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for D1821SH45TPRXPSA1 is usually 5 days.

3.What payment methods are accepted for D1821SH45TPRXPSA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for D1821SH45TPRXPSA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for D1821SH45TPRXPSA1?

D1821SH45TPRXPSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your D1821SH45TPRXPSA1 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 D1821SH45TPRXPSA1?

For technical support, including D1821SH45TPRXPSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your D1821SH45TPRXPSA1 requirements.

6.How does Aetrix verify that D1821SH45TPRXPSA1 is sourced from the original manufacturer or authorized distributors?

All D1821SH45TPRXPSA1 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 D1821SH45TPRXPSA1 meets industry standards.

7.What is the process for return or replacement of D1821SH45TPRXPSA1?

All D1821SH45TPRXPSA1 units undergo pre-shipment inspection (PSI). If there is an issue with D1821SH45TPRXPSA1, 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 D1821SH45TPRXPSA1 part is unused and in its original packaging.

Return procedure for D1821SH45TPRXPSA1:

1.Submit a request within 90 days.

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

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