STMicroelectronics STPS20SM60D

Overview

STPS20SM60D from STMicroelectronics is a single silicon Schottky power rectifier in TO-220AC package, rated for 20 A average forward current and 60 V repetitive peak reverse voltage, with typical forward voltage drop of 0.41 V at 10 A and 25 °C. It operates up to 150 °C junction temperature and is avalanche-rated for robust transient handling in high-frequency switch-mode power supplies used in notebook, game station, and desktop adapters.

For engineers reviewing the STPS20SM60D datasheet, STPS20SM60D pinout, STPS20SM60D application, or STPS20SM60D equivalent, key selection criteria include forward voltage drop at load current, thermal resistance (1.3 °C/W junction-to-case), avalanche energy capability (18.4 kW pulse), reverse leakage at 125 °C, and TO-220AC mechanical mounting compatibility.

Technical Context

This Schottky rectifier uses a planar silicon structure optimized for low conduction loss and fast recovery-no minority-carrier storage enables operation beyond 100 kHz without reverse recovery spikes. Its 0.41–0.58 V forward voltage range across temperature and current ensures stable efficiency in both light-load and full-load adapter operation.

The device is rated for repetitive avalanche pulses up to 80 V and 69 A (tp < 1 µs), validated per AN1768/AN2025 test methods, and features a reverse safe operating area defined for Tj < 150 °C. Thermal design relies on conduction cooling via the case tab, with Rth(j-c) = 1.3 °C/W enabling direct heatsink mounting under 20 A continuous load.

Key Specifications

Pinout & Package

TO-220AC package with isolated metal tab (case), intended for direct heatsink mounting using 0.4–0.6 N·m screw torque. The device has two terminals: anode and cathode, with cathode connected to the metal tab.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-20CPH06 and MUR2060CT, STPS20SM60D delivers the lowest conduction loss and zero reverse recovery, making it optimal for high-efficiency, high-frequency adapter designs where thermal headroom and EMI are constrained.

Availability

STPS20SM60D is available at Aetrix Electronics and suitable for notebook AC adapters, game station power supplies, and desktop PC ATX +12 V rails requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.

Supply support for STPS20SM60D 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, power, microcontroller, and sensor solutions for industrial, automotive, and consumer markets.

STPS20SM60D belongs to ST's Power Schottky Rectifier product line, engineered specifically for high-efficiency, high-frequency AC-DC and DC-DC conversion in space-constrained consumer power adapters.

FAQ

Is STPS20SM60D RoHS-compliant and halogen-free?

Yes. STPS20SM60D is manufactured in ST's ECOPACK®-compliant TO-220AC package, meeting RoHS Directive 2011/65/EU and halogen-free requirements per IEC 61249-2-21. The epoxy resin conforms to UL94 V0 flammability rating, and full compliance documentation is available on ST's official product page.

Can STPS20SM60D be used in parallel configurations?

Parallel operation is not recommended without individual current-sharing resistors or active balancing. Due to parameter spread in VF (±0.065 V at 20 A), unequal current division may occur-leading to thermal runaway in one device. For >20 A applications, select higher-current alternatives like STPS30SM60C instead.

What is the maximum allowable heatsink temperature for continuous 20 A operation?

At IF(AV) = 20 A and Tj(max) = 150 °C, with Rth(j-c) = 1.3 °C/W and typical Rth(c-sink) ≈ 0.5 °C/W, the heatsink baseplate must remain ≤ 124 °C. This assumes 0.4–0.6 N·m mounting torque and electrically isolating thermal interface material with ≤ 0.2 °C·in²/W resistance.

Does STPS20SM60D require a snubber circuit in high-frequency SMPS?

No snubber is required. As a Schottky diode with negligible Qrr and no minority-carrier tail, STPS20SM60D exhibits clean turn-off behavior even at 300 kHz. Snubbers are unnecessary unless parasitic ringing arises from layout-addressed via proper PCB grounding and minimized loop area, not device characteristics.