STMicroelectronics STPSC20H12WL

Overview

STPSC20H12WL from STMicroelectronics is a 1200 V, 20 A silicon carbide Schottky power diode in DO-247 LL 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 STPSC20H12WL datasheet, STPSC20H12WL pinout, STPSC20H12WL application, or STPSC20H12WL equivalent, key selection criteria include its zero-recovery behavior, 1200 V blocking capability, thermal robustness to 175 °C, low capacitive charge (129 nC at 800 V), and DO-247 LL mechanical compatibility with high-power thermal management requirements.

Technical Context

This SiC Schottky diode replaces conventional silicon fast recovery diodes and SiC JBS structures in high-voltage, high-frequency applications. Its wide band-gap silicon carbide substrate enables a 1200 V rating with low VF and near-zero Qrr - eliminating reverse recovery losses and associated EMI.

The device exhibits minimal temperature dependence in both forward voltage (VF drift < 0.9 V from 25 °C to 150 °C) and reverse leakage (IR = 60–800 µA at 150 °C, VR = VRRM), and maintains stable junction-to-case thermal resistance (0.40–0.55 °C/W) across pulse durations from 10 µs to 1 s.

Key Specifications

Pinout & Package

STPSC20H12WL uses the DO-247 LL package: insulated case, single-anode/single-cathode configuration, screw-mount compatible with 0.8–1.0 N·m torque, and optimized for high-current conduction cooling via metal tab. Thermal resistance R_th(j-c) is 0.40–0.55 °C/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 1200 V SiC Schottky diode applications.

Compared with C3D02065A and MDS120-20, STPSC20H12WL offers superior thermal interface (DO-247 LL optimized for high-torque conduction cooling), lowest V_F among 20 A/1200 V SiC diodes, and verified ECOPACK2 compliance - making it optimal for space-constrained, high-reliability EV and telecom applications.

Availability

STPSC20H12WL 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-lifecycle support, and traceable sourcing of high-reliability SiC power devices.

Supply support for STPSC20H12WL 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.

ST's SiC power diode product line targets high-efficiency, high-density power conversion systems - specifically engineered to replace silicon diodes in PFC, solar, EV, and telecom power supplies where zero recovery and thermal resilience are critical.

FAQ

What is the maximum recommended mounting torque for the STPSC20H12WL DO-247 LL package?

The DO-247 LL package specifies a recommended torque value of 0.8 N·m and a maximum torque of 1.0 N·m. Exceeding 1.0 N·m risks mechanical damage to the internal die attach or package seal, potentially degrading thermal resistance or causing hermeticity failure. Use calibrated torque tools and follow ST's AN5088 mounting guidelines for optimal thermal performance.

Does STPSC20H12WL require a gate resistor or snubber network in typical PFC applications?

No - STPSC20H12WL is a two-terminal Schottky diode with no gate terminal and inherently zero reverse recovery charge. Snubbers are unnecessary in most hard-switched PFC boost stages; however, a small RC snubber (e.g., 100 Ω + 100 pF) may be used across the diode to damp residual parasitic ringing caused by layout inductance, not device behavior.

How does the forward voltage drift with temperature compare to silicon fast recovery diodes?

At 20 A, STPSC20H12WL's V_F increases from 1.35 V at 25 °C to 1.75 V at 150 °C - a +0.40 V shift. In contrast, a comparable 1200 V Si FRD shifts +0.9–1.2 V over the same range. This lower drift improves thermal stability and simplifies current-sharing in parallel configurations.

Can STPSC20H12WL be paralleled for higher current handling?

Yes - ST explicitly qualifies this device for parallel operation due to its positive temperature coefficient of forward voltage. As junction temperature rises, V_F increases, promoting natural current balancing. ST recommends matched layout, identical thermal paths, and symmetrical gate drive (if used with synchronous MOSFETs) per AN4021 and AN5088 guidelines.