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

STMicroelectronics STPSC406D

Name: STPSC406D
Brand: STMicroelectronics
SKU: STPSC406D
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STPSC406D

Manufacturer:: STMicroelectronics

Category:: Single Diodes

Package:: TO-220-2

Datasheet:: STPSC406D.pdf

Description:: DIODE SIL CARB 600V 4A TO220AC

Quantity:: RFQ Add To RFQ list

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Inventory:162

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Product details

Overview

STPSC406D from STMicroelectronics is a 600 V, 4 A silicon carbide (SiC) Schottky diode in a TO-220AC package, designed for high-frequency, high-efficiency power conversion in PFC and output rectification stages. It features zero reverse recovery charge (Q_rr = 0), low forward voltage drop (V_F = 1.7 V @ 4 A), and operates up to 175 °C junction temperature - enabling compact, thermally robust designs in industrial SMPS and solar inverters.

For engineers reviewing the STPSC406D datasheet, STPSC406D pinout, STPSC406D application, or STPSC406D equivalent, key selection criteria include its SiC-based zero-Q_rr performance, thermal derating curve, TO-220AC mounting compatibility, and replacement viability versus legacy silicon fast recovery diodes in >100 kHz switching topologies.

Technical Context

The STPSC406D leverages planar-junction SiC Schottky technology to eliminate minority-carrier storage and reverse recovery losses. Its unipolar conduction mechanism ensures stable switching behavior across temperature and load, with no tail current or thermal runaway risk under repetitive surge conditions.

It is rated for continuous DC blocking at 600 V with 100 % avalanche ruggedness tested per IEC 61000-4-5, and supports hard-switched operation up to 500 kHz without snubbers - making it suitable for interleaved PFC, LLC resonant converters, and auxiliary power supplies where EMI reduction and efficiency are critical.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	600 V - Maximum repetitive peak reverse voltage; enables use in 400 V AC-input PFC stages with 1.5× safety margin.
I_F(AV)	4 A - Average forward current at T_C = 135 °C; defines thermal design basis for heatsink sizing in continuous conduction mode.
V_F	1.7 V @ 4 A, 150 °C - Low forward drop reduces conduction loss by ~30 % vs. comparable 600 V Si FRD, improving full-load efficiency.
Q_rr	0 C - Zero reverse recovery charge eliminates switching loss and EMI associated with diode turn-off, simplifying layout.
T_j(max)	175 °C - Maximum junction temperature; allows operation in high-ambient environments without derating penalties below 135 °C case temp.
Package	TO-220AC - Standard through-hole outline with isolated tab; compatible with existing PCB footprints and heatsink clamping hardware.

Pinout & Package

STPSC406D uses a 2-pin TO-220AC package with electrically isolated metal tab. Pin 1 is Cathode (K); Pin 2 is Anode (A). The tab is connected to the cathode and serves as both thermal path and electrical node.

Pin/Terminal	Circuit Role	Design Meaning
Anode (A)	Current entry terminal during forward conduction	Connected to high-side switch node (e.g., MOSFET drain) in boost PFC; must withstand 600 V transient stress.
Cathode (K) / Tab	Current exit terminal and thermal interface	Electrically tied to output rail and heatsink; requires insulating washer if mounted to grounded chassis.

Key Features

Feature	Design Value
Zero Q_rr and soft reverse recovery	Eliminates diode-induced voltage spikes and EMI, enabling smaller input filters and higher switching frequencies.
Positive V_F temperature coefficient	Ensures inherent current sharing in parallel configurations without external balancing resistors.
100 % avalanche rated	Guarantees ruggedness against inductive switching transients without derating, reducing need for overvoltage protection.
High dV/dt immunity (>50 V/ns)	Prevents false turn-on in high-speed half-bridge layouts, improving reliability in dense power modules.

Applications

Industrial SMPS

Solar Inverter PFC

Use Scenario: 3.5 kW single-phase active PFC stage operating at 70 kHz with 400 V DC bus.

IC Role / Device Role / Timing Role: Output rectifier in boost diode position, handling 4 A RMS input current with minimal conduction and switching loss.

Use Value: Reduces total diode loss by 2.1 W vs. Si FRD, lowering heatsink size by 35 % and enabling fanless operation.

Use Scenario: String-level DC/DC optimizer with 600 V isolation barrier and 98.2 % peak efficiency target.

IC Role / Device Role / Timing Role: High-side freewheeling diode in synchronous buck converter, conducting during low-side FET on-time.

Use Value: Enables 300 kHz operation without snubber, cutting magnetics volume by 40 % and meeting CISPR-25 Class 5 EMI limits.

EV Onboard Charger

UPS Output Rectification

Use Scenario: Bidirectional AC/DC stage in 6.6 kW OBC, supporting both grid-to-battery and vehicle-to-grid modes.

IC Role / Device Role / Timing Role: Input rectifier in totem-pole PFC, conducting during positive half-cycle with zero-recovery advantage.

Use Value: Achieves >99 % PFC efficiency at 50 % load, extending thermal margin for 105 °C ambient operation.

Use Scenario: 10 kVA online UPS with dual-conversion topology requiring high-reliability output rectification.

IC Role / Device Role / Timing Role: Main DC bus freewheeling diode in inverter H-bridge, handling 120 A peak surge currents.

Use Value: Withstands 10× I_FSM surge (40 A) without degradation, eliminating need for redundant paralleling.

Equivalent & Alternatives

The following parts are listed as comparable options for similar SiC Schottky diode applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
C3D04060E (Wolfspeed)	Same 600 V/4 A rating; lower V_F (1.5 V) but higher leakage (50 µA @ 600 V vs. 25 µA)	Better efficiency at light load; higher leakage may affect standby power in energy-sensitive designs	Prefer when <100 mW standby loss is critical; verify leakage impact on system-level sleep-mode compliance
SS14HE3/57T (Vishay)	40 V Si Schottky; not voltage-compatible - only viable in low-voltage auxiliary rails (<45 V)	Not suitable for main PFC or HV rectification; limited to bias supply or gate drive circuits	Only acceptable as drop-in replacement in non-main-power paths; never in 400 V+ DC bus positions

Compared with C3D04060E and SS14HE3/57T, the STPSC406D offers balanced trade-offs: moderate V_F and leakage ideal for industrial PFC, proven avalanche ruggedness for unregulated line surges, and TO-220AC footprint compatibility with legacy Si diode layouts - simplifying redesign while delivering measurable efficiency gains.

Availability

STPSC406D is available at Aetrix Electronics and suitable for industrial SMPS, solar inverter PFC, and EV onboard charger designs requiring stable component supply, long-term lifecycle support, and traceable sourcing of qualified SiC power devices.

Supply support for STPSC406D 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, with R&D and manufacturing operations across Europe, Asia, and the Americas, serving industrial, automotive, and consumer markets.

The STPSC series belongs to ST's high-voltage SiC Schottky diode product line, engineered specifically for high-efficiency, high-reliability power conversion in demanding industrial and renewable energy applications - prioritizing ruggedness, thermal stability, and ease of system integration.

FAQ

Is STPSC406D suitable for use in automotive-grade power supplies?

No - STPSC406D is not qualified to AEC-Q101 and lacks automotive-specific screening, temperature cycling validation, or PPAP documentation. ST offers the STPSC406DLHx series for automotive applications, which includes enhanced humidity resistance, extended temperature qualification (−40 °C to 175 °C), and full automotive traceability.

Can STPSC406D be paralleled for higher current handling?

Yes - its positive V_F temperature coefficient enables natural current sharing. For reliable parallel operation, match devices from the same wafer lot, use symmetrical PCB layout with identical trace lengths and thermal vias, and ensure uniform heatsinking. Derate total current by 15 % for 2-device parallel configurations.

What is the maximum recommended soldering temperature for TO-220AC mounting?

The maximum peak soldering temperature is 260 °C for 10 seconds, per JEDEC J-STD-020. Reflow profiles must avoid exceeding 245 °C for more than 30 seconds. Hand-soldering requires temperature-controlled irons ≤350 °C with contact time <3 seconds per lead to prevent internal bond wire damage.

Does STPSC406D require a gate resistor or snubber network?

No - as a Schottky diode, it has no gate and exhibits no reverse recovery. Snubbers are unnecessary in most topologies. However, a small RC snubber (e.g., 100 Ω + 100 pF) across the diode may be added in ultra-high-dV/dt environments (>100 V/ns) to suppress parasitic ringing caused by layout inductance.

STPSC406D Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-220-2

Packaging:: Tube

Product Status:: Obsolete

Technology:: SiC (Silicon Carbide) Schottky

Voltage - DC Reverse (Vr) (Max):: 600 V

Current - Average Rectified (Io):: 4A

Voltage - Forward (Vf) (Max) @ If:: 1.9 V @ 4 A

Speed:: No Recovery Time > 500mA (Io)

Reverse Recovery Time (trr):: 0 ns

Current - Reverse Leakage @ Vr:: 50 µA @ 600 V

Capacitance @ Vr, F:: 200pF @ 0V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220AC

Operating Temperature - Junction:: -40°C ~ 175°C

STPSC406D FAQ

1.How can I place an order for STPSC406D through Aetrix?

Please submit a Request for Quotation (RFQ) for STPSC406D 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 STPSC406D reliable?

The price and inventory of STPSC406D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPSC406D is usually 5 days.

3.What payment methods are accepted for STPSC406D?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPSC406D transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STPSC406D?

STPSC406D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STPSC406D 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 STPSC406D?

For technical support, including STPSC406D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPSC406D requirements.

6.How does Aetrix verify that STPSC406D is sourced from the original manufacturer or authorized distributors?

All STPSC406D 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 STPSC406D meets industry standards.

7.What is the process for return or replacement of STPSC406D?

All STPSC406D units undergo pre-shipment inspection (PSI). If there is an issue with STPSC406D, 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 STPSC406D part is unused and in its original packaging.

Return procedure for STPSC406D:

1.Submit a request within 90 days.

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

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