STMicroelectronics STPS20S100CFP

Overview

STPS20S100CFP from STMicroelectronics is a dual common-cathode Schottky barrier rectifier in TO-220FPAB 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 STPS20S100CFP datasheet, STPS20S100CFP pinout, STPS20S100CFP application, or STPS20S100CFP equivalent, key selection criteria include junction-to-case thermal resistance (3.5 °C/W total), avalanche power rating (518 W), low leakage at 125 °C (≤4.5 mA), dual-diode configuration, and ECOPACK®2 compliance for industrial-grade reliability.

Technical Context

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

Thermal design leverages direct conduction cooling via the metal tab (Rth(j-c) = 3.5 °C/W total), while avalanche-rated capability supports transient overvoltage resilience in unregulated input stages. The device operates up to 175 °C junction temperature with controlled thermal runaway margin under specified (dPtot/dTj) < (1/Rth(j-a)) conditions.

Key Specifications

Pinout & Package

TO-220FPAB package with isolated mounting tab (non-electrically connected), 3-terminal configuration: two anodes (A1, A2) and one shared cathode (K). Tab serves as thermal path only; no electrical connection.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-20CPH05-M3 and MBR20100CT, STPS20S100CFP delivers superior thermal performance per watt in confined spaces due to its 3.5 °C/W Rth(j-c) and 0.66 V VF at 125 °C, while its avalanche rating adds system-level robustness absent in both alternatives.

Availability

STPS20S100CFP is available at Aetrix Electronics and suitable for LED lighting drivers, desktop power supplies, industrial DC/DC converters, and USB-C PD adapters requiring stable component supply and long-term manufacturability.

Supply support for STPS20S100CFP 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 automotive, industrial, and consumer markets.

The STPS20S100CFP belongs to ST's high-reliability Schottky rectifier product line, engineered specifically for high-frequency, high-temperature power conversion in space-constrained and thermally demanding applications.

FAQ

What is the maximum continuous current per diode at 100 °C case temperature?

At Tc = 100 °C and duty cycle δ = 0.5, the STPS20S100CFP supports 10 A average forward current per diode. This is derived from Figure 2 in DS4269 Rev 3, which shows IF(AV) ≈ 10 A at 100 °C ambient for TO-220FPAB with Rth(j-a) = 15 °C/W, and confirmed by thermal derating curves accounting for junction-to-case resistance and thermal coupling between diodes.

Is the mounting tab electrically isolated in the TO-220FPAB package?

Yes, the metal tab in the TO-220FPAB package is electrically isolated from all terminals (A1, A2, K). It serves solely as a thermal conduction path and may be directly mounted to a grounded heatsink without risk of short circuit, as verified in Section 2.1 of DS4269 Rev 3 and mechanical drawings in Table 4.

How does the dual-anode configuration affect PCB layout compared to single-diode alternatives?

The dual-anode common-cathode structure allows symmetrical high-current routing from two separate transformer windings or switch nodes to a shared output capacitor, reducing loop area and EMI. Unlike two discrete TO-220 devices, it eliminates mismatched thermal paths and ensures matched VF drift across temperature, improving current sharing without external balancing components.

Can STPS20S100CFP replace STPS20S100CT in existing designs?

Yes, STPS20S100CFP is a direct drop-in replacement for STPS20S100CT in most applications, sharing identical electrical specs and pinout. However, the TO-220FPAB package has higher Rth(j-c) (3.5 °C/W vs. 1.3 °C/W for TO-220AB), so thermal validation is required if operating near 20 A total continuous current or in high-ambient environments above 60 °C.