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

STMicroelectronics STPSC20G12WL

Name: STPSC20G12WL
Brand: STMicroelectronics
SKU: STPSC20G12WL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STPSC20G12WL

Manufacturer:: STMicroelectronics

Category:: Single Diodes

Package:: TO-247-2

Datasheet:: STPSC20G12WL.pdf

Description:: 1200 V, 20 A HIGH SURGE SILICON

Quantity:: RFQ Add To RFQ list

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Product details

Overview

STPSC20G12WL from STMicroelectronics is a 1200 V, 20 A silicon carbide Schottky power diode in DO-247LL package, designed for high-efficiency hard-switching PFC and DC/DC stages in solar inverters, EV on-board chargers, and telecom power supplies. It delivers negligible reverse recovery, temperature-independent switching, 1.35 V typical forward voltage at 20 A, 175 °C max junction temperature, and avalanche energy rating of 174 mJ.

For engineers reviewing the STPSC20G12WL datasheet, STPSC20G12WL pinout, STPSC20G12WL application, or STPSC20G12WL equivalent, key selection criteria include its SiC-based zero-recovery behavior, high surge robustness (180 A IFSM), low thermal resistance (0.45 °C/W Rth(j-c)), and ECOPACK2 compliance for industrial and automotive-grade reliability.

Technical Context

This SiC Schottky diode replaces conventional silicon fast recovery and ultrafast diodes in high-voltage, high-frequency power conversion. Its wide band-gap material enables a 1200 V blocking capability with low VF and near-zero Qrr-eliminating reverse recovery losses and associated EMI.

The device operates across -55 °C to +175 °C junction temperature, supports hard-switching at >10 kHz with 76 A repetitive peak forward current (IFRM), and features a thermally optimized DO-247LL package with 0.45 °C/W typical junction-to-case thermal resistance for conduction-limited designs.

Key Specifications

Parameter	Value and Actual Design Meaning
VRRM	1200 V - Enables use in 1000 V DC bus systems with 20% safety margin for solar and EV charging applications.
IF(AV)	20 A at Tc = 150 °C - Sustains continuous conduction in boost PFC stages without derating below 150 °C case temperature.
VF (typ.)	1.35 V at IF = 20 A, Tj = 25 °C - Reduces conduction loss vs. Si FRD (typically ≥2.2 V), improving system efficiency by ~0.5–1.2% in 3–5 kW PFC.
EAS	174 mJ at Tj = 25 °C, IAS = 5.9 A, L = 10 mH - Withstands single-pulse avalanche stress during overvoltage transients without failure.
Rth(j-c)	0.45 °C/W (typ.) - Enables direct heatsink mounting with minimal thermal interface resistance for compact thermal design.
IFSM	180 A (10 ms sinusoidal, Tc = 25 °C) - Handles inrush and overload surges in UPS and server PSUs without bond-wire fusing.
Tj range	-55 °C to +175 °C - Supports operation in under-hood EV OBCs and outdoor solar inverters without thermal throttling.

Pinout & Package

STPSC20G12WL uses the DO-247LL through-hole package with two terminals: anode and cathode. The long-lead variant (LL) facilitates vertical mounting and improves mechanical stability in high-vibration environments such as EV powertrain systems.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Current entry point during forward conduction	Connected to input side of boost inductor in PFC; must be routed with low-inductance path to minimize voltage overshoot.
Cathode	Current exit point during forward conduction	Connected to switching node (e.g., MOSFET drain); requires thermal pad connection to heatsink for Rth(j-c) performance.

Key Features

Feature	Design Value
Zero reverse recovery charge (Qrr ≈ 0)	Eliminates turn-off switching loss and associated ringing, enabling >100 kHz operation without snubbers in PFC.
Temperature-stable VF and switching	Forward voltage increases only ~0.55 V from 25 °C to 175 °C - ensures predictable loss budget across full operating range.
Avalanche-rated construction	Guarantees ruggedness against unclamped inductive switching events in hard-switched topologies without external clamping.
ECOPACK2 compliance	Meets RoHS, halogen-free, and lead-free soldering requirements per JEDEC J-STD-020, supporting industrial and automotive qualification.
High surge capability (180 A IFSM)	Withstands 10 ms AC line fault currents and cold-start inrush in UPS and server PSUs without degradation.

Applications

Solar Inverter Boost Stage

EV On-Board Charger (OBC)

Use Scenario: High-voltage DC link boost stage converting PV array output (600–1000 V) to 1200 V DC bus for inverter stage.

IC Role / Device Role / Timing Role: Power rectifier in continuous conduction mode (CCM) boost converter operating at 50–100 kHz.

Use Value: Zero Qrr eliminates reverse recovery loss, reducing diode temperature rise by up to 15 °C vs. Si FRD and enabling smaller heatsinks.

Use Scenario: Bidirectional AC/DC and DC/DC stage in 11 kW OBC, handling 400–800 V battery charging with active PFC and LLC isolation.

IC Role / Device Role / Timing Role: Output rectifier in secondary-side synchronous rectification or high-side freewheeling diode in phase-shifted full-bridge.

Use Value: 175 °C Tj rating allows placement near transformer/heatsink without thermal derating; 180 A IFSM handles battery pre-charge surges.

Telecom Server PSU

Industrial UPS Power Stage

Use Scenario: High-density 48 V or 54 V output rectification in 3 kW telecom rectifiers with distributed power architecture.

IC Role / Device Role / Timing Role: Secondary-side output diode in phase-shifted full-bridge or active clamp forward topology.

Use Value: Low VF (1.35 V) reduces conduction loss by ~35% vs. 1.8 V Si Schottky, increasing full-load efficiency from 95.2% to 95.8%.

Use Scenario: Input-stage boost PFC and output-stage DC link clamping in 10 kVA industrial UPS with 600 V DC bus.

IC Role / Device Role / Timing Role: Freewheeling diode in IGBT-based inverter leg and clamping diode in snubber networks.

Use Value: Avalanche energy rating (174 mJ) absorbs inductive kickback during IGBT short-circuit events, preventing catastrophic failure.

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; Rth(j-c) = 0.55 °C/W; TO-247-2L package.	Higher VF increases conduction loss by ~0.15 V; larger thermal resistance limits power density in space-constrained OBC modules.	Prefer when legacy TO-247 footprint compatibility is required; avoid if thermal margin is <5 °C at 20 A continuous.
IXYS XDH20120A	1200 V/20 A; VF = 1.45 V (typ.); Rth(j-c) = 0.50 °C/W; DO-247 package (standard lead length, not LL).	Shorter leads reduce mechanical robustness in vibration-prone EV applications; no specified avalanche energy rating.	Select for cost-sensitive telecom PSUs where vibration is absent; verify avalanche immunity via external TVS if used in motor drive snubbers.

Compared with C3D20120D and XDH20120A, STPSC20G12WL offers the lowest VF (1.35 V), best thermal resistance (0.45 °C/W), and certified avalanche ruggedness-making it optimal for thermally constrained, high-reliability PFC and OBC designs where efficiency and transient robustness are critical.

Availability

STPSC20G12WL is available at Aetrix Electronics and suitable for solar inverter boost stages, EV on-board chargers, and telecom server power supplies requiring stable component supply, long-term lifecycle support, and AEC-Q101-aligned manufacturing traceability.

Supply support for STPSC20G12WL 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, delivering innovative solutions across automotive, industrial, power, and digital markets with over 40 years of analog and power device expertise.

The STPSC series belongs to ST's high-voltage silicon carbide power diode product line, engineered specifically for high-efficiency, high-reliability PFC, solar, and EV charging applications where zero-recovery performance and thermal resilience are mandatory.

FAQ

What is the maximum recommended torque for mounting STPSC20G12WL?

The DO-247LL package specifies a recommended torque value of 0.8 N·m and a maximum torque of 1.0 N·m for terminal screw mounting. Exceeding 1.0 N·m risks cracking the epoxy body or deforming the internal lead frame, potentially compromising thermal performance and long-term reliability under thermal cycling.

Does STPSC20G12WL require a gate resistor or driver circuit?

No - STPSC20G12WL is a passive Schottky diode with no gate terminal or control input. It conducts automatically when forward-biased and blocks when reverse-biased. Unlike MOSFETs or IGBTs, it does not require gate drive circuitry, snubbers for turn-off, or timing synchronization in switching topologies.

Can STPSC20G12WL replace a silicon fast recovery diode in an existing design?

Yes - it is a direct drop-in replacement for 1200 V Si FRDs (e.g., STTH30R12DY) in most boost PFC and DC/DC circuits. Key benefits include elimination of reverse recovery loss, reduced EMI, and higher allowable switching frequency. Thermal layout must be verified due to different Rth(j-c) and mounting geometry (DO-247LL vs. TO-247).

Is STPSC20G12WL qualified for automotive applications?

While not AEC-Q101 certified, STPSC20G12WL meets automotive-relevant stress requirements: 175 °C max Tj, -55 °C min Tstg, avalanche energy rating, and ECOPACK2 environmental compliance. It is widely deployed in EV on-board chargers and DC/DC converters where system-level qualification covers device-level robustness.

STPSC20G12WL Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

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:: 1548pF @ 0V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-247 LL

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

STPSC20G12WL FAQ

1.How can I place an order for STPSC20G12WL through Aetrix?

Please submit a Request for Quotation (RFQ) for STPSC20G12WL 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 STPSC20G12WL reliable?

The price and inventory of STPSC20G12WL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPSC20G12WL is usually 5 days.

3.What payment methods are accepted for STPSC20G12WL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPSC20G12WL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STPSC20G12WL?

STPSC20G12WL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STPSC20G12WL 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 STPSC20G12WL?

For technical support, including STPSC20G12WL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPSC20G12WL requirements.

6.How does Aetrix verify that STPSC20G12WL is sourced from the original manufacturer or authorized distributors?

All STPSC20G12WL 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 STPSC20G12WL meets industry standards.

7.What is the process for return or replacement of STPSC20G12WL?

All STPSC20G12WL units undergo pre-shipment inspection (PSI). If there is an issue with STPSC20G12WL, 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 STPSC20G12WL part is unused and in its original packaging.

Return procedure for STPSC20G12WL:

1.Submit a request within 90 days.

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

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