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

STMicroelectronics STPSC20H12D

Name: STPSC20H12D
Brand: STMicroelectronics
SKU: STPSC20H12D
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STPSC20H12D

Manufacturer:: STMicroelectronics

Category:: Single Diodes

Package:: TO-220-2

Datasheet:: STPSC20H12D.pdf

Description:: DIODE SIL CARB 1.2KV 20A TO220AC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

STPSC20H12D from STMicroelectronics is a 1200 V, 20 A silicon carbide Schottky power diode in TO-220AC package, designed for high-efficiency PFC and secondary-side rectification in hard-switching topologies. It delivers negligible reverse recovery, temperature-independent switching, 1.35 V typical forward voltage at 20 A and 25 °C, and operates up to 175 °C junction temperature - enabling use in solar inverters and EV on-board chargers.

For engineers reviewing the STPSC20H12D datasheet, STPSC20H12D pinout, STPSC20H12D application, or STPSC20H12D equivalent, key selection criteria include its zero-recovery behavior, thermal robustness (Tj = −40 to +175 °C), low capacitive charge (129 nC at 800 V), high surge capability (140 A @ 10 ms), and ECOPACK2 compliance for industrial power systems.

Technical Context

This SiC Schottky diode replaces conventional silicon fast recovery diodes in high-voltage, high-frequency switching applications. Its wide band-gap silicon carbide substrate enables a 1200 V blocking rating with low VF and eliminates minority-carrier storage, resulting in no reverse recovery current and minimal ringing during turn-off.

The device exhibits thermally stable dynamic performance: junction capacitance (1650 pF at 0 V) and total capacitive charge (129 nC at 800 V) remain consistent across temperature, and forward voltage increases only moderately from 1.35 V (25 °C) to 1.75 V (150 °C) at 20 A - supporting predictable loss modeling in PFC and DC/DC stages.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	1200 V - Enables direct use in 800 V DC bus systems with 50 % voltage margin for transient overvoltage protection.
I_F(AV)	20 A at T_C = 155 °C - Sustains continuous conduction in high-power PFC boost stages without derating below 155 °C case temperature.
V_F (typ.)	1.35 V at I_F = 20 A, T_j = 25 °C - Reduces conduction loss by ~30 % vs. comparable Si FRD, improving system efficiency at light-to-full load.
I_FSM	140 A (10 ms sinusoidal, T_C = 25 °C) - Withstands inrush and fault currents in UPS and solar inverter startup without failure.
R_th(j-c)	0.30 °C/W (typ.) - Enables compact heatsink design: <1.5 K temperature rise per watt of conduction loss at rated current.
Q_CJ	129 nC at V_R = 800 V - Low stored capacitive charge minimizes turn-off switching loss and EMI generation in >100 kHz converters.
T_j range	−40 to +175 °C - Supports operation in under-hood automotive OBCs and outdoor-rated solar inverters without thermal throttling.

Pinout & Package

TO-220AC package: single-sided metal tab for conductive cooling; 3-pin outline with anode (pin 1), cathode (pin 2), and electrically isolated metal tab (pin 3, connected to cathode internally). Mounting torque: 0.55 N·m recommended, max 0.70 N·m.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Lead)	Anode	Connects to AC or switching node side; carries full forward current into the SiC junction.
Pin 2 (Lead)	Cathode	Connects to output DC bus; serves as return path and thermal interface via internal tab connection.
Metal Tab	Cathode (internally tied)	Primary thermal path to heatsink; electrically active cathode terminal requiring insulated mounting or grounded heatsink.

Key Features

Feature	Design Value
Zero reverse recovery charge	Eliminates reverse recovery losses and associated EMI, enabling higher switching frequencies without snubbers.
Temperature-stable switching	No degradation in Q_CJ, C_j, or V_F drift across −40 to +175 °C - simplifies thermal design and control loop stability.
High surge robustness	140 A non-repetitive surge rating supports reliable operation during grid transients and capacitor charging events.
ECOPACK2 compliance	Meets RoHS, halogen-free, and material declaration requirements for industrial and automotive end equipment.
Low R_th(j-c)	0.30 °C/W typ. enables >90 W power dissipation with ≤30 K rise above heatsink - suitable for convection-cooled designs.

Applications

Solar Inverter Boost Stage

EV On-Board Charger (OBC)

Use Scenario: High-voltage DC link boost converter in string inverters operating at 100–200 kHz switching frequency.

IC Role / Device Role / Timing Role: Primary unidirectional power switch in synchronous boost rectification, handling 20 A average current at 1200 V blocking.

Use Value: Zero recovery eliminates shoot-through risk and reduces gate driver stress, increasing system reliability and enabling smaller magnetics.

Use Scenario: Secondary-side rectification in dual-active-bridge (DAB) topology for 11 kW OBCs with 800 V battery interface.

IC Role / Device Role / Timing Role: High-frequency freewheeling diode in resonant LLC and DAB converters, operating continuously at 150 °C junction temperature.

Use Value: Stable V_F and Q_CJ ensure consistent efficiency across ambient temperatures, reducing thermal management complexity in confined vehicle compartments.

Telecom Server PSU

Industrial UPS Output Stage

Use Scenario: Active clamp forward or phase-shifted full-bridge rectifier in 48 V output, 3 kW telecom rectifiers.

IC Role / Device Role / Timing Role: Output rectifier handling 40 A RMS current with tight duty-cycle constraints and high dv/dt stress.

Use Value: Negligible ringing and absence of reverse recovery current prevent false triggering of overvoltage protection circuits during fast turn-off.

Use Scenario: Battery backup rectification and inverter output stage in 10 kVA three-phase UPS systems with 1200 V DC link.

IC Role / Device Role / Timing Role: High-surge-capability freewheeling diode in IGBT-based inverter legs, conducting during motor regeneration and line faults.

Use Value: 140 A surge rating ensures survival during short-circuit events without parallel devices, lowering BOM count and layout area.

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, but TO-220-2L package (cathode tab only); R_th(j-c) = 0.35 °C/W; V_F = 1.45 V (typ.)	Lacks isolated anode lead - requires different PCB layout and mounting isolation strategy.	Select when footprint compatibility with legacy TO-220-2L designs is required and slightly higher V_F is acceptable.
IXYS MDS20120SB (Littelfuse)	1200 V / 20 A, TO-247 package; R_th(j-c) = 0.40 °C/W; V_F = 1.40 V (typ.); Q_CJ = 145 nC	Larger TO-247 footprint and higher capacitive charge increase switching loss in >150 kHz designs.	Prefer for lower-cost, lower-frequency (<100 kHz) industrial PSUs where thermal margin allows larger heatsink.

Compared with C3D20120D and MDS20120SB, STPSC20H12D offers superior thermal resistance (0.30 °C/W), lowest V_F (1.35 V), and lowest Q_CJ (129 nC), making it optimal for space-constrained, high-frequency, high-temperature applications like solar and EV charging.

Availability

STPSC20H12D is available at Aetrix Electronics and suitable for solar inverters, EV on-board chargers, and telecom server power supplies requiring stable component supply, long-lifecycle support, and traceable sourcing for industrial production programs.

Supply support for STPSC20H12D 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 industrial, automotive, and consumer markets.

STPSC20H12D belongs to ST's STPSC family of silicon carbide Schottky diodes - engineered specifically for high-efficiency, high-reliability power conversion in renewable energy and electrified transportation systems.

FAQ

Is STPSC20H12D pin-compatible with standard silicon diodes in TO-220AC packages?

No. While it shares the TO-220AC mechanical outline, STPSC20H12D uses a 3-lead configuration (anode, cathode, isolated tab) versus standard 2-lead silicon diodes. The tab is internally connected to the cathode, requiring correct PCB pad isolation and mounting practices to avoid short circuits.

What is the maximum recommended case temperature for continuous operation?

The datasheet specifies I_F(AV) = 20 A at T_C = 155 °C for TO-220AC. Operation beyond 155 °C case temperature requires derating per Figure 3; sustained T_C > 160 °C risks exceeding the 175 °C maximum junction temperature under full load.

Does STPSC20H12D require a gate resistor or snubber circuit?

No. As a Schottky diode with no minority carriers, it has no reverse recovery and negligible turn-off ringing. Snubbers are unnecessary in properly laid-out layouts; however, layout parasitics should still be minimized to suppress high-frequency oscillation from junction capacitance.

Can STPSC20H12D replace STPSC20H12G in D²PAK footprint designs?

No. STPSC20H12D uses TO-220AC packaging with different thermal pad geometry, lead spacing, and mounting hole position. Direct substitution would cause solder joint misalignment and thermal interface failure. Use STPSC20H12G for D²PAK-compatible designs.

STPSC20H12D Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-220-2

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:: 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:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220AC

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

STPSC20H12D FAQ

1.How can I place an order for STPSC20H12D through Aetrix?

Please submit a Request for Quotation (RFQ) for STPSC20H12D 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 STPSC20H12D reliable?

The price and inventory of STPSC20H12D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPSC20H12D is usually 5 days.

3.What payment methods are accepted for STPSC20H12D?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPSC20H12D transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STPSC20H12D?

STPSC20H12D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STPSC20H12D 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 STPSC20H12D?

For technical support, including STPSC20H12D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPSC20H12D requirements.

6.How does Aetrix verify that STPSC20H12D is sourced from the original manufacturer or authorized distributors?

All STPSC20H12D 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 STPSC20H12D meets industry standards.

7.What is the process for return or replacement of STPSC20H12D?

All STPSC20H12D units undergo pre-shipment inspection (PSI). If there is an issue with STPSC20H12D, 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 STPSC20H12D part is unused and in its original packaging.

Return procedure for STPSC20H12D:

1.Submit a request within 90 days.

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

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