STMicroelectronics STPST10H100SF

Overview

STPST10H100SF from STMicroelectronics is a 10 A, 100 V Schottky trench rectifier in PSMC (TO-277A) package, optimized for high-frequency SMPS with low conduction and switching losses. It features 0.565 V typical forward voltage at 10 A/125 °C, 175 °C max junction temperature, and avalanche-rated operation-used in telecom auxiliary supplies and LED lighting flyback converters.

For engineers reviewing the STPST10H100SF datasheet, STPST10H100SF pinout, STPST10H100SF application, or STPST10H100SF equivalent, key selection criteria include VF/IR trade-off at 125 °C, Rth(j-c) = 1.25 °C/W thermal performance, ECOPACK2 compliance, and suitability for freewheeling or reverse polarity protection with ST VIPer or MOSFETs.

Technical Context

This device uses ST's proprietary trench Schottky technology to achieve superior VF/IR balance versus planar Schottkys-enabling higher efficiency in compact 100 V DC/DC stages. Its flat PSMC package supports PCB-side thermal conduction without leads, and the 14 A single-pulse avalanche rating allows robust unclamped inductive switching in flyback snubbers.

Designed for δ = 0.5 square-wave operation up to 155 °C case temperature, it delivers 10 A average forward current with <6.4 mA IR at 70 V/125 °C. Junction capacitance is ~1000 pF at 1 V reverse bias (1 MHz), supporting stable high-frequency rectification without excessive capacitive turn-on loss.

Key Specifications

Pinout & Package

PSMC (TO-277A) is a flat, leadless surface-mount package with exposed cathode pad for thermal conduction. Dimensions: 6.50 mm × 4.60 mm × 1.10 mm (L × W × H); weight: 90 mg; UL94 V0 epoxy; ECOPACK2 compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-10BQ100-M3/5BT and MBR10100CT, STPST10H100SF delivers lower VF, better thermal resistance, and verified avalanche capability-making it optimal for space-constrained, high-reliability flyback and OR-ing designs where efficiency and ruggedness are prioritized.

Availability

STPST10H100SF is available at Aetrix Electronics and suitable for telecom auxiliary supplies, LED lighting drivers, and smart meter power stages requiring stable component supply, long-term lifecycle support, and ECOPACK2 compliance.

Supply support for STPST10H100SF 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, designing and manufacturing silicon solutions for automotive, industrial, and power management applications.

This device belongs to ST's high-efficiency power rectifier product line, engineered specifically for high-frequency, space-constrained SMPS where low VF, thermal robustness, and avalanche tolerance are critical.

FAQ

What is the maximum allowable case temperature for continuous 10 A operation?

The datasheet specifies IF(AV) = 10 A at Tc = 155 °C under δ = 0.5 square-wave conditions. Operation above this requires derating per Figure 3; at Tc = 100 °C, max IF(AV) rises to ~22 A. Thermal design must maintain Tc ≤155 °C using the 1.25 °C/W Rth(j-c) and appropriate PCB copper area.

Does STPST10H100SF require a heatsink in typical SMPS applications?

No external heatsink is required if the PCB provides ≥6 cm² of 70 µm copper under the cathode tab, per Figure 8. With that layout, Rth(j-a) drops to ~4.5 °C/W, limiting junction temperature to ~115 °C at 10 A/40 °C ambient-well below the 175 °C limit.

How does its avalanche rating compare to standard Schottky diodes?

Unlike most Schottkys, STPST10H100SF is fully tested to IAS = 14 A (EAS = 0.5 × L × IAS² × VCLDUT) per Figure 1–2. This enables safe operation in unclamped inductive switching events-common in flyback snubberless designs-where standard Schottkys would fail catastrophically.

Can it replace a standard 100 V, 10 A fast recovery diode in existing designs?

Yes, but only in forward-biased rectification roles-not reverse recovery–critical positions like boost PFC. Its zero Qrr eliminates reverse recovery loss, but its 100 V VRRM offers less margin than 600 V FRDs. Verify peak reverse voltage stays ≤70 V in the target circuit to ensure reliability.