STMicroelectronics STPS10120CFP

Overview

STPS10120CFP from STMicroelectronics is a dual common-cathode Schottky rectifier optimized for high-frequency switched-mode power supplies, with 120 V repetitive peak reverse voltage, 5 A average forward current per diode (10 A total device), and 0.64 V typical forward voltage drop at 125 °C/5 A. It enables efficient DC/DC conversion in telecom power and LED lighting systems.

For engineers reviewing the STPS10120CFP datasheet, STPS10120CFP pinout, STPS10120CFP application, or STPS10120CFP equivalent, key selection criteria include junction-to-case thermal resistance (3.8 °C/W per diode), avalanche capability (215 W at 10 µs), low leakage (≤3 mA at 125 °C/VRRM), and TO-220AB package compatibility with standard heatsink mounting.

Technical Context

This dual-diode Schottky rectifier operates as a synchronous rectification solution in high-efficiency SMPS topologies, where low forward voltage minimizes conduction loss and high Tj(max) of 175 °C supports compact thermal design. Its common-cathode configuration allows independent anode control while sharing cathode return path.

The device features avalanche-rated capability (215 W, 10 µs pulse, Tj = 125 °C) and thermal coupling between diodes quantified by Rth(c) = 0.7 °C/W - critical for accurate junction temperature estimation when both diodes conduct simultaneously.

Key Specifications

Pinout & Package

Packaged in TO-220AB, this dual-diode device uses a 3-terminal configuration with shared cathode connection and two isolated anodes. The case is electrically connected to the cathode terminal.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-10BQ120-M3 and MBR10120CT, STPS10120CFP delivers lower VF and verified avalanche capability - making it preferred for high-reliability telecom and LED driver applications where thermal margin and transient robustness are critical.

Availability

STPS10120CFP is available at Aetrix Electronics and suitable for telecom power supplies, LED lighting drivers, notebook adapters, and industrial DC/DC converters requiring stable component supply and long-term manufacturability.

Supply support for STPS10120CFP 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, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

The STPS series targets high-efficiency power conversion, with STPS10120CFP specifically engineered for high-frequency SMPS rectification where low VF, high Tj, and avalanche ruggedness are essential.

FAQ

Is STPS10120CFP pin-compatible with STPS10120CT?

Yes - both share identical TO-220AB package outline and 3-terminal pinout (A1, A2, K). The "FP" suffix denotes tape-and-reel packaging for automated assembly, while "CT" indicates tube packaging; electrical and thermal specifications are identical.

What is the maximum recommended mounting torque for the TO-220AB package?

The datasheet specifies a recommended torque value of 0.55 N·m and a maximum torque of 0.70 N·m for the mounting screw. Exceeding 0.70 N·m risks mechanical damage to the leadframe or die attach, compromising thermal performance and reliability.

Does STPS10120CFP require a heatsink in all applications?

A heatsink is required when dissipating ≥2.5 W per diode continuously. At 5 A/0.64 V, conduction loss is ~3.2 W per diode - exceeding the natural convection limit of TO-220AB. Derating curves confirm heatsink use above 60 °C ambient for full-rated current.

How does the thermal coupling parameter Rth(c) affect dual-diode operation?

Rth(c) = 0.7 °C/W quantifies thermal crosstalk: power dissipated in Diode 2 raises Diode 1's junction temperature by P₂ × 0.7 °C. This must be included in thermal calculations when both diodes operate simultaneously - e.g., in dual-output flyback designs - to avoid exceeding 175 °C Tj.