STMicroelectronics STPS20120CFP

Overview

STPS20120CFP from STMicroelectronics is a dual center-tap Schottky rectifier in TO-220FPAB package, rated for 120 V repetitive peak reverse voltage and 2 × 10 A average forward current per diode at Tc = 100 °C, with typical forward voltage drop of 0.7 V at 10 A and 125 °C - designed for high-frequency SMPS in notebook/LCD adapters and desktop power supplies.

For engineers reviewing the STPS20120CFP datasheet, STPS20120CFP pinout, STPS20120CFP application, or STPS20120CFP equivalent, key selection criteria include avalanche rating (4600 W), low leakage (≤5 mA at 125 °C), thermal resistance (Rth(j-c) = 4.5 °C/W total), and junction temperature capability up to 175 °C.

Technical Context

This dual-diode Schottky rectifier integrates two anodes and one shared cathode in a center-tap configuration, enabling synchronous rectification or dual-output DC/DC conversion. Its low VF–IR trade-off supports efficiency-critical 100–500 kHz switch-mode topologies.

Thermal design relies on conduction cooling via the TO-220FPAB case; junction-to-case resistance is 4.5 °C/W total (2.75 °C/W per diode), and coupling resistance between diodes is 3.5 °C/W - critical for simultaneous conduction derating.

Key Specifications

Pinout & Package

TO-220FPAB package: insulated plastic body with metal tab (cathode-connected), three leads - two anodes (A1, A2) and one common cathode (K). Mounting hole diameter 3.0–3.2 mm; recommended torque 0.4–0.6 N·m.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-20CPH12-M3 and MBR20120CT, STPS20120CFP uniquely combines integrated dual-anode center-tap topology, TO-220FPAB insulation, and 4.5 °C/W total thermal resistance - optimizing board space, safety compliance, and thermal management in compact AC/DC adapters.

Availability

STPS20120CFP is available at Aetrix Electronics and suitable for notebook adapters, LCD monitor power supplies, and desktop SMPS requiring stable component supply with industrial-grade thermal and avalanche robustness.

Supply support for STPS20120CFP 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.

STPS20120CFP belongs to ST's Power Schottky Rectifier product line, engineered specifically for high-efficiency, high-reliability AC/DC and DC/DC conversion in space- and thermal-constrained power adapters and computing supplies.

FAQ

What is the thermal resistance junction-to-case for STPS20120CFP?

The total junction-to-case thermal resistance (Rth(j-c)) for STPS20120CFP is 4.5 °C/W, measured across both diodes simultaneously. This value reflects conduction through the TO-220FPAB insulated package and is validated per JEDEC JESD51-14 standards. It assumes mounting on a copper heatsink with 0.4–0.6 N·m screw torque and thermal interface material.

Is STPS20120CFP suitable for synchronous rectification?

Yes - STPS20120CFP supports synchronous rectification in forward, flyback, and LLC topologies due to its low VF (0.7 V typ. at 10 A/125 °C) and fast recovery (Schottky, no minority-carrier storage). Its dual-anode structure allows independent gate drive timing for each leg, though external MOSFET drivers are required for true synchronous control.

Does the TO-220FPAB package provide electrical isolation?

Yes - the TO-220FPAB package features an insulated metal tab (K terminal) rated for 2500 V RMS isolation between tab and leads. This eliminates need for insulating washers when mounting directly to grounded heatsinks, simplifying mechanical assembly and improving thermal reliability in Class II AC/DC systems.

How does STPS20120CFP handle surge currents?

STPS20120CFP is rated for 150 A non-repetitive surge current (IFSM) at tp = 10 ms (sinusoidal), and it is avalanche-rated for 4600 W at tp = 1 µs. These ratings enable robust handling of inrush, short-circuit, and transformer leakage spikes without degradation - verified per IEC 61000-4-5 surge immunity test conditions.