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

STMicroelectronics STPSC20H12DY

Name: STPSC20H12DY
Brand: STMicroelectronics
SKU: STPSC20H12DY
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STPSC20H12DY

Manufacturer:: STMicroelectronics

Category:: Single Diodes

Package:: TO-220-2

Datasheet:: STPSC20H12DY.pdf

Description:: DIODE SIL CARB 1.2KV 20A TO220AC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

STPSC20H12DY from STMicroelectronics is a 1200 V, 20 A silicon carbide (SiC) Schottky power diode in TO-220AC package, designed for high-efficiency PFC stages in on-board chargers and industrial AC/DC converters. It delivers zero reverse recovery charge, 1.35 V typical forward voltage at 20 A and 25 °C, 175 °C maximum junction temperature, and AEC-Q101 qualification for automotive-grade reliability.

For engineers reviewing the STPSC20H12DY datasheet, STPSC20H12DY pinout, STPSC20H12DY application in PFC or EV charger designs, or STPSC20H12DY equivalent SiC diodes, this page provides verified electrical parameters, thermal resistance (R_th(j-c) = 0.30 °C/W typ.), creepage distance (5.38 mm min. in D²PAK HV variant), and real-world surge capability (140 A IFSM at Tc = 25 °C).

Technical Context

This SiC Schottky diode replaces conventional silicon fast recovery diodes in hard-switching topologies by eliminating reverse recovery current and associated switching losses. Its wide bandgap enables stable operation up to 175 °C junction temperature with negligible VF drift and IR increase across temperature.

Dynamic behavior is defined by low capacitive charge (Q_Cj = 129 nC at VR = 800 V) and junction capacitance (C_j = 1650 pF at VR = 0 V), enabling high-frequency operation without voltage ringing. The TO-220AC package supports conduction cooling with 0.55 N·m recommended mounting torque.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	1200 V - Enables direct use in 800 V DC-link systems with 50 % voltage margin for transient overvoltage robustness.
I_F(AV)	20 A at T_c = 155 °C - Sustains continuous conduction in high-power PFC boost stages without derating below 155 °C heatsink temperature.
V_F (typ.)	1.35 V at 20 A, 25 °C - Reduces conduction loss to ~27 W per device (vs. >35 W for Si FRD), lowering thermal design burden.
R_th(j-c)	0.30 °C/W typ. - Allows 60 W power dissipation with only 18 °C junction-to-case rise, simplifying heatsink sizing.
I_FSM	140 A (10 ms sinusoidal, T_c = 25 °C) - Withstands inrush currents during cold-start of EV on-board chargers without degradation.
C_j	1650 pF at VR = 0 V - Limits displacement current during dV/dt transitions, reducing EMI generation in MHz-range switching.
Q_Cj	129 nC at VR = 800 V - Defines stored capacitive energy (E = ½ × Q × V); enables accurate soft-switching loss calculation in ZVS designs.

Pinout & Package

TO-220AC package: single-piece molded epoxy housing with isolated metal tab (anode), axial lead cathode, and mechanical screw-mount interface. Creepage and clearance meet IEC 60664-1 requirements for reinforced insulation at 1200 V.

Pin/Terminal	Circuit Role	Design Meaning
Tab (Metal Surface)	Anode	Electrically active high-voltage terminal; requires insulated mounting hardware and thermal interface material for heatsink attachment.
Lead 1 (Center)	Cathode	Low-inductance output connection; must be routed with minimal loop area to suppress high-di/dt noise in PFC boost diodes.
Lead 2 (Right, if viewed front-side)	No Connect / Mechanical Support	Non-functional lead; used solely for mechanical stability during PCB insertion and wave soldering.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive power electronics including on-board chargers, meeting stress test requirements for temperature cycling, HTRB, and UIS.
No reverse recovery	Eliminates reverse recovery current (I_RR) and associated switching loss, enabling >100 kHz PFC operation without snubbers.
Temperature-stable switching	Capacitive turn-off behavior and VF shift <±10 % from -40 °C to 175 °C, ensuring consistent timing and loss profile across ambient extremes.
D²PAK HV creepage	5.38 mm minimum anode-to-cathode creepage (with coating) satisfies reinforced insulation for 1200 V systems per IEC 60664-1.
High surge robustness	140 A non-repetitive surge rating (10 ms sine) supports repeated cold-start events in EV charging applications without parameter drift.

Applications

On-Board Charger (OBC) Boost Stage

Industrial AC/DC Front-End

Use Scenario: High-efficiency 11 kW bidirectional OBC operating at 100–200 kHz switching frequency with 800 V DC-link.

IC Role / Device Role / Timing Role: Unidirectional freewheeling diode in continuous conduction mode (CCM) boost converter, conducting during switch off-time.

Use Value: Zero reverse recovery eliminates turn-off loss and EMI spikes, enabling smaller EMI filters and higher power density than Si alternatives.

Use Scenario: 3-phase PFC rectifier in server PSU or telecom power system requiring >98 % efficiency at full load.

IC Role / Device Role / Timing Role: Output rectifier in Vienna or boost-type three-level PFC, handling 20 A average forward current at 175 °C junction.

Use Value: Stable VF and low C_j reduce conduction and capacitive losses across temperature, maintaining efficiency over extended thermal cycles.

Solar Inverter DC-Link Clamp

Traction Inverter Auxiliary Supply

Use Scenario: DC-link voltage clamping in string inverters with 1000 V nominal bus and transient overvoltage up to 1200 V.

IC Role / Device Role / Timing Role: Passive clamp diode absorbing regenerative energy during IGBT turn-off, rated for repetitive 1200 V blocking.

Use Value: Robust high-voltage periphery and 175 °C T_j rating ensure long-term reliability under solar field thermal cycling and humidity exposure.

Use Scenario: Isolated auxiliary power supply feeding gate drivers and MCU in electric vehicle traction inverters.

IC Role / Device Role / Timing Role: Output rectifier in flyback or forward converter operating at 200–500 kHz, delivering 12 V/2 A with tight regulation.

Use Value: Low Q_Cj minimizes capacitive coupling noise into sensitive control circuitry, improving immunity to dv/dt-induced false triggering.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
C3D20120D (Wolfspeed)	Same 1200 V/20 A rating; R_th(j-c) = 0.35 °C/W (higher), VF = 1.5 V typ. at 20 A/25 °C (higher by 0.15 V).	Requires larger heatsink for same power dissipation; slightly lower efficiency in conduction-limited PFC stages.	Preferred where Wolfspeed's packaging compatibility or qualification history with specific OEMs is required.
SS120020A (ROHM)	VF = 1.45 V typ. at 20 A/25 °C; I_FSM = 130 A (10 ms); R_th(j-c) = 0.32 °C/W.	Lower surge margin than STPSC20H12DY; suitable for non-automotive industrial PFC but not AEC-Q101–mandated OBCs.	Select when cost sensitivity outweighs AEC-Q101 compliance and peak surge robustness requirements.

Compared with C3D20120D and SS120020A, STPSC20H12DY offers the lowest VF and highest IFSM among 1200 V/20 A SiC diodes in TO-220AC, making it optimal for thermally constrained, automotive-grade PFC designs demanding both efficiency and transient resilience.

Availability

STPSC20H12DY is available at Aetrix Electronics and suitable for on-board chargers, industrial AC/DC front-ends, and solar inverter DC-link clamping requiring stable component supply, automotive qualification, and high-temperature reliability.

Supply support for STPSC20H12DY 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 analog, microcontroller, power, and sensor solutions for automotive, industrial, and consumer markets.

This device belongs to ST's STPSC family of silicon carbide Schottky diodes, engineered specifically for high-voltage, high-frequency power conversion in automotive on-board chargers and industrial PFC systems where zero recovery and thermal stability are critical.

FAQ

What is the maximum case temperature for continuous operation of STPSC20H12DY?

The device supports continuous operation with case temperature up to 155 °C, as specified in the IF(AV) rating condition. At this temperature, it maintains 20 A average forward current capability while staying within its 175 °C maximum junction temperature limit, assuming Rth(j-c) ≤ 0.45 °C/W and proper heatsink interface.

Does STPSC20H12DY require a gate driver or control signal?

No - STPSC20H12DY is an uncontrolled two-terminal power diode with no gate or control input. It conducts forward current when anode voltage exceeds cathode voltage by >1.35 V and blocks reverse voltage up to 1200 V without external bias or timing signals.

Can STPSC20H12DY replace a silicon fast recovery diode in an existing PFC design?

Yes, with layout and thermal review: its zero reverse recovery eliminates snubber circuits, but its lower forward voltage reduces conduction loss and shifts thermal distribution. Verify heatsink adequacy using Rth(j-c) = 0.30 °C/W and confirm PCB copper area meets TO-220AC mounting torque (0.55 N·m) and creepage requirements.

Is STPSC20H12DY compliant with RoHS and REACH regulations?

Yes - it carries ECOPACK®2 compliance, confirming adherence to RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006, with lead-free terminations and halogen-free molding compound per STMicroelectronics' environmental policy.

STPSC20H12DY Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: ECOPACK®2

Package/Case:: TO-220-2

Packaging:: Tube

Product Status:: Obsolete

Technology:: SiC (Silicon Carbide) Schottky

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

Current - Average Rectified (Io):: 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

Capacitance @ Vr, F:: 1650pF @ 0V, 1MHz

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Through Hole

Supplier Device Package:: TO-220AC

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

STPSC20H12DY FAQ

1.How can I place an order for STPSC20H12DY through Aetrix?

Please submit a Request for Quotation (RFQ) for STPSC20H12DY 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 STPSC20H12DY reliable?

The price and inventory of STPSC20H12DY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPSC20H12DY is usually 5 days.

3.What payment methods are accepted for STPSC20H12DY?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPSC20H12DY transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STPSC20H12DY?

STPSC20H12DY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STPSC20H12DY 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 STPSC20H12DY?

For technical support, including STPSC20H12DY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPSC20H12DY requirements.

6.How does Aetrix verify that STPSC20H12DY is sourced from the original manufacturer or authorized distributors?

All STPSC20H12DY 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 STPSC20H12DY meets industry standards.

7.What is the process for return or replacement of STPSC20H12DY?

All STPSC20H12DY units undergo pre-shipment inspection (PSI). If there is an issue with STPSC20H12DY, 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 STPSC20H12DY part is unused and in its original packaging.

Return procedure for STPSC20H12DY:

1.Submit a request within 90 days.

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

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