STMicroelectronics STPS20S100CT

Overview

STPS20S100CT from STMicroelectronics is a dual common-cathode Schottky barrier rectifier in TO-220AB package, rated for 100 V reverse voltage and 2 × 10 A average forward current per diode, with typical forward voltage of 0.66 V at 125 °C and 10 A, designed for high-frequency DC/DC converters and LED lighting power stages.

For engineers reviewing the STPS20S100CT datasheet, STPS20S100CT pinout, STPS20S100CT application, or STPS20S100CT equivalent, key selection criteria include junction temperature capability (175 °C), low leakage at high Tj, avalanche rating (518 W), thermal resistance (1.3 °C/W total), and dual-diode configuration for interleaved or parallel output paths.

Technical Context

This dual Schottky rectifier integrates two independent anode terminals (A1, A2) and a shared cathode (K) in a single TO-220AB thermally optimized package. Its low VF and negligible reverse recovery enable high-efficiency operation in 100–500 kHz SMPS topologies without snubbers.

The device supports simultaneous conduction of both diodes under balanced load conditions, with thermal coupling modeled via Rth(j-c) = 2.2 °C/W per diode and Rth(c) = 0.3 °C/W between diodes - critical for accurate junction temperature prediction in compact heatsink designs.

Key Specifications

Pinout & Package

STPS20S100CT is housed in TO-220AB package with isolated mounting tab (electrically connected to cathode K), featuring three external terminals: two anodes (A1, A2) and one common cathode (K). The package provides 1.3 °C/W total junction-to-case thermal resistance and meets UL94 V0 flammability rating.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual common-cathode Schottky rectifier applications.

Compared with VS-20CPH06-M3 and MBR20100CT, STPS20S100CT uniquely balances 100 V rating, 175 °C operation, and 0.66 V VF - making it optimal for thermally constrained, high-reliability 48–60 V DC/DC and LED applications where long-term stability matters.

Availability

STPS20S100CT is available at Aetrix Electronics and suitable for AC-DC adapters, industrial LED drivers, and server DC/DC converters requiring stable component supply, consistent thermal performance, and long-lifecycle availability.

Supply support for STPS20S100CT 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, analog ICs, and sensors for industrial, automotive, and consumer markets.

STPS20S100CT belongs to ST's high-voltage Schottky rectifier product line, engineered specifically for high-frequency, high-efficiency power conversion in space- and thermally-constrained applications such as compact adapters and solid-state lighting.

FAQ

Is STPS20S100CT pin-compatible with MBR20100CT?

Yes - both use TO-220AB package with identical pinout: A1, A2, and common K. Mechanical footprint, hole spacing, and tab connection match exactly. However, STPS20S100CT delivers 0.66 V VF at 125 °C versus 0.85 V for MBR20100CT at 25 °C, resulting in significantly lower thermal stress under real operating conditions.

Can STPS20S100CT be used in parallel configurations?

Yes, but only with matched forward voltage characteristics and individual current-sharing resistors. The device's low IR at high temperature (≤4.5 mA at 125 °C) minimizes thermal runaway risk, and its 175 °C Tj rating supports conservative derating - however, thermal coupling between A1 and A2 must be modeled using Rth(c) = 0.3 °C/W when calculating junction temperatures.

What is the maximum surge current rating for STPS20S100CT?

The IFSM rating is 180 A for a 10 ms sinusoidal half-cycle at 25 °C. This value applies per diode, meaning each anode can handle up to 180 A transient independently. For repeated surges, the repetitive avalanche power rating (518 W at 10 µs) governs safe operation during short-duration overvoltage events.

Does STPS20S100CT require a heatsink in a 10 A application?

Yes - at 10 A per diode and 0.66 V VF, power dissipation is ~6.6 W per diode (13.2 W total). With Rth(j-c) = 1.3 °C/W, junction temperature rise is ~17.2 °C above case temperature. To stay within 175 °C Tj at 100 °C case, a heatsink with Rth(c-a) ≤ 4.5 °C/W is required - typically achieved with a 25 mm × 25 mm × 10 mm aluminum finned heatsink.