STMicroelectronics STPS20M100SFP

Overview

STPS20M100SFP from STMicroelectronics is a 100 V, 20 A single Schottky rectifier in insulated TO-220FPAB package, optimized for high-frequency switch-mode power supplies. It delivers low forward voltage (0.61 V typ. at 25 °C, 20 A), avalanche-rated operation, and 2000 VRMS insulation - enabling efficient, robust DC/DC conversion in notebook and game station adapters.

For engineers reviewing the STPS20M100SFP datasheet, STPS20M100SFP pinout, STPS20M100SFP application, or STPS20M100SFP equivalent, key selection criteria include its 100 V reverse rating, 20 A average forward current capability, insulated thermal interface, and low-conduction-loss performance at both light and full load.

Technical Context

This Schottky diode operates as a unidirectional power rectifier with zero recovery time and no minority-carrier storage, eliminating switching losses in high-frequency topologies. Its avalanche rating supports transient energy absorption without failure, while the TO-220FPAB's 2000 VRMS isolation enables direct mounting to grounded heatsinks without additional insulators.

Thermal design is defined by Rth(j-c) = 4 °C/W (case-to-junction), requiring careful heatsink sizing for continuous 20 A operation at ambient temperatures up to 85 °C. The device's low VF and high IF(AV) make it suitable for primary-side synchronous rectification and secondary-side output rectification in isolated flyback and LLC converters.

Key Specifications

Pinout & Package

TO-220FPAB package: insulated plastic housing with metal tab electrically isolated from cathode terminal; 3-pin configuration (Anode, Cathode, Tab); UL 94 V0 epoxy; recommended torque 0.55 N·m.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-20CPH06-M3, STPS20M100SFP trades 1.5 °C/W higher thermal resistance for integrated 2000 VRMS isolation - simplifying mechanical design at the cost of slightly larger heatsink area. Against MBR20100CT, it offers true 20 A single-path capability and 0.14 V lower VF, directly improving efficiency in high-current single-rail outputs.

Availability

STPS20M100SFP is available at Aetrix Electronics and suitable for notebook AC adapters, game station power supplies, and desktop external PSUs requiring stable component supply, long-lifecycle support, and certified ECOPACK®2 compliance.

Supply support for STPS20M100SFP 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 automotive, industrial, and consumer markets.

The STPS20M100SFP belongs to ST's high-current Schottky rectifier product line, engineered specifically for high-efficiency, high-reliability AC/DC and DC/DC power conversion in space-constrained consumer adapters and computing peripherals.

FAQ

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

The STPS20M100SFP is rated for IF(AV) = 20 A at TC = 85 °C, per datasheet Table 1. Exceeding this case temperature requires linear derating - e.g., at TC = 100 °C, maximum IF(AV) drops to approximately 16 A. Thermal design must ensure heatsink interface maintains TC ≤ 85 °C under worst-case ambient and airflow conditions.

Does the TO-220FPAB package require thermal compound between tab and heatsink?

Yes - although the TO-220FPAB tab is electrically insulated, thermal interface material (TIM) is required to minimize Rth(c-hs). ST recommends silicone-based thermal grease or phase-change pads with thermal conductivity ≥1.0 W/m·K. Mechanical mounting pressure must be controlled to avoid cracking the epoxy body, with torque limited to 0.55 N·m.

Can STPS20M100SFP replace a standard silicon rectifier like 1N5408 in a 12 V adapter?

No - the 1N5408 is a 3 A, 1000 V general-purpose silicon diode with ~1.1 V VF and slow recovery. STPS20M100SFP is a 20 A, 100 V Schottky rectifier optimized for high-frequency SMPS. Direct substitution would cause catastrophic overcurrent unless the circuit is redesigned for lower forward voltage, higher current capability, and absence of reverse recovery stress.

Is STPS20M100SFP suitable for automotive under-hood applications?

No - while rated for TJ(max) = 150 °C, the STPS20M100SFP is not AEC-Q101 qualified and lacks automotive-specific screening (e.g., HTOL, ESD, vibration testing). Its ECOPACK®2 compliance targets consumer electronics, not automotive environments. For under-hood use, ST recommends AEC-Q101-qualified alternatives such as STTH20L06TV1.