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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Diode Arrays

STMicroelectronics STPSC40H12CWY

Name: STPSC40H12CWY
Brand: STMicroelectronics
SKU: STPSC40H12CWY
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STPSC40H12CWY

Manufacturer:: STMicroelectronics

Category:: Diode Arrays

Package:: TO-247-3

Datasheet:: STPSC40H12CWY.pdf

Description:: DIODE ARRAY SIC 1200V 20A TO-247

Quantity:: RFQ Add To RFQ list

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Inventory:155

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Product details

Overview

STPSC40H12CWY from STMicroelectronics is a 1200 V, 40 A dual-die silicon carbide Schottky power rectifier in TO-247 package, designed for high-efficiency PFC and LLC resonant converter secondary-side rectification. It delivers 1.35 V typical forward voltage at 20 A per diode, operates up to 175 °C junction temperature, and exhibits negligible reverse recovery-enabling hard-switching operation in on-board chargers and EV charging stations.

For engineers reviewing the STPSC40H12CWY datasheet, STPSC40H12CWY pinout, STPSC40H12CWY application, or STPSC40H12CWY equivalent, key selection criteria include its 1200 V V_RRM, dual-diode 2×20 A I_F(AV) rating, temperature-independent capacitive turn-off behavior, and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

This SiC Schottky diode replaces conventional silicon fast recovery diodes and SiC JBS devices in high-voltage, high-frequency power conversion. Its zero reverse recovery charge (Q_CJ = 129 nC at 800 V) and low junction capacitance (1650 pF at 0 V) minimize switching losses and EMI generation in resonant topologies.

The dual-die configuration shares a common cathode in a single TO-247 package, enabling parallel conduction paths with matched thermal and electrical characteristics. Its robust high-voltage periphery supports stable operation under repetitive 1200 V reverse bias across -40 °C to +175 °C junction temperature range.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	1200 V - Withstands peak reverse voltage in PFC boost stages and LLC output rectification without avalanche breakdown.
I_F(AV)	40 A total (2 × 20 A per die) - Enables high-power output with DC conduction capability at T_c = 150 °C.
V_F (typ.)	1.35 V @ 20 A, 25 °C - Reduces conduction loss vs. Si diodes (typically >2.0 V), improving system efficiency by ~0.5–1.2% in 3–6 kW PFC stages.
Q_CJ	129 nC @ 800 V - Defines stored capacitive charge; directly determines turn-off energy loss in hard-switched converters.
R_th(j-c)	0.20 °C/W (device) - Enables 175 °C max junction operation with ≤30 W dissipation under forced-air cooling at T_c = 100 °C.
I_FSM	140 A @ 10 ms, T_c = 25 °C - Supports surge immunity during inrush or fault conditions in OBC startup sequences.
T_j (max)	175 °C - Allows compact heatsink design and eliminates derating in high-ambient automotive under-hood environments.

Pinout & Package

TO-247 package with 3-terminal configuration: Anode 1, Cathode (common), Anode 2. Epoxy meets UL94 V0; recommended mounting torque: 0.8 N·m.

Pin/Terminal	Circuit Role	Design Meaning
Anode 1	Input terminal for first SiC die	Connects to transformer secondary or PFC inductor output; carries up to 20 A DC per diode path.
Cathode	Common output node	Shared low-impedance return path for both dies; must be thermally anchored to heatsink via mounting screw.
Anode 2	Input terminal for second SiC die	Enables interleaved or phase-split rectification; electrically isolated but thermally coupled to Anode 1 die.

Key Features

Feature	Design Value
No reverse recovery	Zero Q_rr enables elimination of snubbers and reduces EMI filtering requirements in 100–300 kHz LLC designs.
AEC-Q101 qualified	Validated for automotive power electronics including traction inverters, DC/DC converters, and OBCs per stress test protocol.
Temperature-stable switching	Capacitive turn-off behavior unchanged from -40 °C to +175 °C - ensures consistent timing margins across full operating range.
High surge robustness	140 A non-repetitive surge rating supports repeated cold-start cycles in EV charging infrastructure without degradation.
ECOPACK2 compliance	Lead-free, halogen-free construction meets EU RoHS and REACH requirements for industrial and automotive supply chains.

Applications

On-Board Battery Charger (OBC)

PHEV/EV Charging Station

Use Scenario: Bidirectional AC/DC and DC/DC conversion in 11–22 kW vehicle-integrated chargers.

IC Role / Device Role / Timing Role: Secondary-side synchronous rectifier in CLLC resonant DC/DC stage; replaces Si MOSFETs to eliminate body diode conduction loss.

Use Value: Enables >97% peak efficiency at 20 kHz switching frequency due to absence of reverse recovery and low V_F drift over temperature.

Use Scenario: High-power unidirectional AC/DC front-end with active PFC and isolated DC/DC output.

IC Role / Device Role / Timing Role: Boost diode in 3-phase totem-pole PFC stage operating at 65–100 kHz.

Use Value: Reduces conduction and switching losses by 35% vs. 650 V Si superjunction diodes, lowering heatsink mass by 40%.

Resonant LLC Converter

Industrial PFC Module

Use Scenario: Primary-side clamp and secondary-side rectification in server PSU and telecom rectifiers.

IC Role / Device Role / Timing Role: Output rectifier in asymmetrical half-bridge LLC with ZVS operation.

Use Value: Eliminates reverse recovery-induced voltage overshoot, allowing use of 600 V-rated output capacitors instead of 800 V grade.

Use Scenario: Fixed-frequency boost PFC in motor drives, UPS, and welding equipment.

IC Role / Device Role / Timing Role: High-voltage freewheeling diode in continuous conduction mode (CCM) boost stage.

Use Value: Maintains <10 µA leakage at 150 °C, preventing thermal runaway in enclosed industrial enclosures.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
C3D04065E (Wolfspeed)	650 V rating, single-die 40 A, lower V_F (1.25 V), higher C_j (2200 pF)	Not suitable for 1200 V PFC; limited to secondary-side only in <650 V systems	Select when system topology constrains V_RRM ≤650 V and lowest conduction loss is prioritized.
FFSH40120A (ON Semiconductor)	1200 V, 40 A, single-die, higher V_F (1.55 V typ.), AEC-Q101 qualified	Lacks dual-die layout; requires two devices for same current sharing as STPSC40H12CWY	Choose when board layout allows discrete placement and thermal management favors separate packages.

Compared with C3D04065E and FFSH40120A, STPSC40H12CWY uniquely combines 1200 V rating, dual-die integration, and AEC-Q101 qualification-making it the only drop-in solution for space-constrained, automotive-grade 11–22 kW OBC secondary-side rectification.

Availability

STPSC40H12CWY is available at Aetrix Electronics and suitable for on-board battery chargers, EV charging stations, and resonant LLC power supplies requiring stable component supply, long-term lifecycle support, and automotive-grade qualification.

Supply support for STPSC40H12CWY 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, designing and manufacturing microcontrollers, power devices, sensors, and analog ICs for automotive, industrial, and consumer markets.

This device belongs to ST's STPSC family of silicon carbide Schottky diodes, engineered specifically for high-efficiency, high-reliability power conversion in automotive electrification and renewable energy infrastructure.

FAQ

What is the thermal resistance from junction to case for STPSC40H12CWY?

The device specifies R_th(j-c) = 0.20 °C/W (typical) for the full package and 0.40 °C/W per diode. This value is measured under standard JEDEC test conditions with the case mounted to a cold plate, and enables accurate thermal modeling for heatsink sizing in continuous 40 A operation.

Does STPSC40H12CWY support paralleling of the two internal dies?

Yes-the two 20 A SiC dies share a common cathode and are electrically isolated anodes, allowing direct parallel connection without external balancing components. Matching V_F and thermal coupling ensure current sharing within ±5% across temperature and load.

Is STPSC40H12CWY suitable for use in totem-pole PFC circuits?

Yes-it is explicitly validated for totem-pole PFC operation, where zero reverse recovery prevents shoot-through risk and minimizes switching loss during high-frequency (≥65 kHz) commutation of the high-side switch.

How does the ECOPACK2 compliance affect PCB assembly?

ECOPACK2 compliance confirms lead-free, halogen-free terminations compatible with standard SnAgCu reflow profiles (peak 260 °C). The TO-247 package requires mechanical anchoring and controlled torque (0.8 N·m) during screw mounting to avoid die stress and interfacial delamination.

STPSC40H12CWY Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-247-3

Packaging:: Tube

Product Status:: Active

Diode Configuration:: 1 Pair Common Cathode

Technology:: SiC (Silicon Carbide) Schottky

Voltage - DC Reverse (Vr) (Max):: 1200 V

Current - Average Rectified (Io) (per Diode):: 20A

Voltage - Forward (Vf) (Max) @ If:: 1.5 V @ 20 A

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

Reverse Recovery Time (trr):: 0 ns

Current - Reverse Leakage @ Vr:: 120 µA @ 1200 V

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

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Through Hole

Supplier Device Package:: TO-247

STPSC40H12CWY FAQ

1.How can I place an order for STPSC40H12CWY through Aetrix?

Please submit a Request for Quotation (RFQ) for STPSC40H12CWY 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 STPSC40H12CWY reliable?

The price and inventory of STPSC40H12CWY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPSC40H12CWY is usually 5 days.

3.What payment methods are accepted for STPSC40H12CWY?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPSC40H12CWY transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STPSC40H12CWY?

STPSC40H12CWY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STPSC40H12CWY 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 STPSC40H12CWY?

For technical support, including STPSC40H12CWY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPSC40H12CWY requirements.

6.How does Aetrix verify that STPSC40H12CWY is sourced from the original manufacturer or authorized distributors?

All STPSC40H12CWY 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 STPSC40H12CWY meets industry standards.

7.What is the process for return or replacement of STPSC40H12CWY?

All STPSC40H12CWY units undergo pre-shipment inspection (PSI). If there is an issue with STPSC40H12CWY, 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 STPSC40H12CWY part is unused and in its original packaging.

Return procedure for STPSC40H12CWY:

1.Submit a request within 90 days.

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

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