Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

STMicroelectronics STPSC20G12WLY

Name: STPSC20G12WLY
Brand: STMicroelectronics
SKU: STPSC20G12WLY
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: STPSC20G12WLY

Manufacturer:: STMicroelectronics

Category:: Single Diodes

Package:: TO-247-2

Datasheet:: STPSC20G12WLY.pdf

Description:: AUTOMOTIVE 1200 V, 20A POWER SCH

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:170

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

STPSC20G12WLY from STMicroelectronics is a 1200 V, 20 A automotive-grade silicon carbide Schottky power diode in DO-247 LL package, featuring negligible reverse recovery, temperature-independent switching, 1.35 V typical forward voltage at 20 A and 25 °C, 175 °C maximum junction temperature, and 174 mJ single-pulse avalanche energy - deployed in on-board EV battery chargers and high-efficiency PFC stages.

For engineers reviewing the STPSC20G12WLY datasheet, STPSC20G12WLY pinout, STPSC20G12WLY application, or STPSC20G12WLY equivalent, key selection criteria include its SiC-based zero-recovery behavior, high surge robustness (180 A @ 10 ms), low thermal resistance (0.45 °C/W typ.), and AEC-Q101 qualification for automotive power conversion systems.

Technical Context

This SiC Schottky diode replaces conventional silicon fast recovery diodes in hard-switching PFC and DC/DC stages by eliminating reverse recovery charge (Qrr ≈ 0) and associated switching losses. Its wide band-gap enables stable VF and Cj characteristics across -55 °C to +175 °C operating range.

The device uses a planar Schottky structure on 4H-SiC substrate with optimized high-voltage periphery, delivering 1200 V blocking capability while maintaining low capacitive turn-off behavior (Cj = 1548 pF at 0 V, 73 pF at 800 V) and minimal voltage ringing during commutation.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	1200 V - Enables use in 800 V DC-link systems with 50 % voltage margin for transient overvoltage protection
I_F(AV)	20 A @ T_c = 150 °C - Sustains continuous conduction in high-power PFC boost legs without derating
V_F (typ.)	1.35 V @ 20 A, 25 °C - Reduces conduction loss to ~27 W vs. ~40 W for comparable Si diode
E_AS	174 mJ - Withstands single avalanche events in unclamped inductive switching, enhancing system fault tolerance
R_th(j-c)	0.45 °C/W (typ.) - Enables efficient heat transfer to heatsink, supporting compact thermal design
I_FSM	180 A @ 10 ms sinusoidal - Handles cold-start surges and line transients in EV OBC without degradation
C_j	1548 pF @ 0 V - Low capacitance minimizes displacement current and EMI generation during hard switching

Pinout & Package

STPSC20G12WLY is housed in a DO-247 LL (Long Lead) package with two terminals: anode and cathode. The package features epoxy meeting UL94 V0, 0.8 N·m recommended mounting torque, and conduction-based cooling via case contact.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Current entry point under forward bias	Connected to AC input or switch node in boost PFC; must withstand full reverse voltage when off
Cathode	Current exit point under forward bias	Connected to DC bus or output capacitor; serves as reference for gate drivers and sensing circuits

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive powertrain and charging systems per stress test requirements including HTGB, HTRB, and TC
Zero reverse recovery (Q_rr ≈ 0)	Eliminates turn-off switching loss and associated EMI, enabling >100 kHz PFC operation without snubbers
Temperature-stable VF and C_j	Forward voltage increases only ~0.55 V from 25 °C to 175 °C; capacitance variation <±15 % across full T_j range
High surge robustness	180 A non-repetitive surge rating supports 2× peak line-current surges in 3-phase PFC without bond-wire failure
ECOPACK2 compliance	Meets RoHS, halogen-free, and REACH requirements with lead-free termination and recyclable packaging

Applications

On-Board EV Battery Charger (OBC)

Industrial Boost PFC Module

Use Scenario: Bidirectional AC/DC conversion in 11 kW–22 kW OBCs with interleaved boost topology.

IC Role / Device Role / Timing Role: High-side freewheeling diode in dual-phase interleaved boost stage, conducting during MOSFET off-time.

Use Value: Zero Q_rr eliminates cross-conduction loss and reduces heatsink size by 35 % vs. Si FRD alternatives.

Use Scenario: Front-end PFC in server PSUs and telecom rectifiers operating at 65–100 kHz.

IC Role / Device Role / Timing Role: Output rectifier in continuous conduction mode (CCM) boost converter.

Use Value: Stable 1.35–1.9 V VF across -40 °C to +125 °C ambient ensures consistent efficiency in fanless enclosures.

EV DC Fast Charging Station

Renewable Energy Inverter

Use Scenario: Secondary-side rectification in isolated LLC resonant DC/DC stages feeding 800 V battery stacks.

IC Role / Device Role / Timing Role: High-voltage output diode handling 1200 V reverse stress and 20 A average current.

Use Value: 174 mJ avalanche rating tolerates reflected transients from IGBT short-circuit events in primary side.

Use Scenario: Grid-tied solar inverter with active clamp flyback or three-level NPC topology.

IC Role / Device Role / Timing Role: Freewheeling path in bidirectional DC link chopper for reactive power control.

Use Value: Junction temperature stability up to 175 °C allows operation in desert environments without forced air cooling.

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
C3D20120D (Wolfspeed)	Same 1200 V/20 A rating; VF = 1.5 V (typ.) at 20 A; R_th(j-c) = 0.55 °C/W	Higher VF increases conduction loss by ~12 %; slightly lower surge rating (160 A)	Select when prioritizing supply chain diversity over minimal VF or thermal performance
FFSH20120A (onsemi)	1200 V/20 A; VF = 1.45 V (typ.); avalanche rated (150 mJ); DO-247 package but standard lead length	Lower avalanche energy; no AEC-Q101 qualification; shorter leads reduce creepage in high-humidity environments	Select for industrial UPS or solar inverters where automotive qualification is not required

Compared with C3D20120D and FFSH20120A, STPSC20G12WLY offers the lowest VF, highest avalanche energy, and AEC-Q101 certification - making it optimal for mission-critical automotive OBC and fast-charging infrastructure where thermal margin and transient robustness are non-negotiable.

Availability

STPSC20G12WLY is available at Aetrix Electronics and suitable for on-board EV battery chargers, industrial PFC modules, and EV DC fast charging stations requiring stable component supply, long-term lifecycle support, and automotive-grade reliability.

Supply support for STPSC20G12WLY 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 diode belongs to ST's STPSC family of automotive-qualified SiC Schottky rectifiers, engineered specifically for high-efficiency, high-reliability power conversion in electric vehicle charging and renewable energy systems.

FAQ

What is the maximum allowable case temperature for continuous operation?

The STPSC20G12WLY supports continuous operation with case temperature up to 150 °C, as specified in its absolute ratings table. At this temperature, it delivers 20 A average forward current with derated surge capability (160 A @ 10 ms). Thermal design must maintain case temperature below this limit using appropriate heatsinking and airflow.

Does this diode require a gate driver or external control signal?

No - STPSC20G12WLY is a passive two-terminal Schottky diode with no gate terminal or control interface. It operates solely based on applied voltage polarity and magnitude, conducting when anode voltage exceeds cathode voltage by >VF, and blocking when reverse biased up to 1200 V.

How does its avalanche rating compare to silicon diodes in similar packages?

Unlike standard silicon diodes - which lack defined avalanche capability - STPSC20G12WLY is fully rated for 174 mJ single-pulse avalanche energy at 25 °C. This enables safe operation during unclamped inductive switching events common in PFC and DC/DC converters, eliminating need for external clamping circuits.

Can STPSC20G12WLY be used in parallel configurations?

Yes - its positive temperature coefficient of forward voltage enables natural current sharing when paralleled. However, layout symmetry, matched thermal paths, and individual gate-drive decoupling (if used with synchronous rectification schemes) are essential. ST recommends ≤3 devices in parallel without active current balancing.

STPSC20G12WLY Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: ECOPACK®2

Package/Case:: TO-247-2

Packaging:: Tube

Product Status:: Active

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:: Fast Recovery =< 500ns, > 200mA (Io)

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 150 µA @ 1200 V

Capacitance @ Vr, F:: -

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Through Hole

Supplier Device Package:: DO-247 LL

Operating Temperature - Junction:: -55°C ~ 175°C

STPSC20G12WLY FAQ

1.How can I place an order for STPSC20G12WLY through Aetrix?

Please submit a Request for Quotation (RFQ) for STPSC20G12WLY 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 STPSC20G12WLY reliable?

The price and inventory of STPSC20G12WLY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPSC20G12WLY is usually 5 days.

3.What payment methods are accepted for STPSC20G12WLY?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPSC20G12WLY transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STPSC20G12WLY?

STPSC20G12WLY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STPSC20G12WLY 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 STPSC20G12WLY?

For technical support, including STPSC20G12WLY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPSC20G12WLY requirements.

6.How does Aetrix verify that STPSC20G12WLY is sourced from the original manufacturer or authorized distributors?

All STPSC20G12WLY 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 STPSC20G12WLY meets industry standards.

7.What is the process for return or replacement of STPSC20G12WLY?

All STPSC20G12WLY units undergo pre-shipment inspection (PSI). If there is an issue with STPSC20G12WLY, 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 STPSC20G12WLY part is unused and in its original packaging.

Return procedure for STPSC20G12WLY:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…