STMicroelectronics STPS1H100AF

Overview

STPS1H100AF from STMicroelectronics is a 100 V, 1 A surface-mount Schottky rectifier in SMA Flat package, optimized for high-frequency DC/DC converters and LED lighting power supplies. It delivers low forward voltage (0.62 V max at 125 °C, 1 A), negligible switching losses, 175 °C maximum junction temperature, and specified avalanche capability for robust transient handling.

For engineers reviewing the STPS1H100AF datasheet, STPS1H100AF pinout, STPS1H100AF application, or STPS1H100AF equivalent, this diode is selected for compact, thermally efficient 100 V rectification where low conduction loss and high thermal reliability are critical in space-constrained power stages.

Technical Context

This Schottky rectifier uses a planar silicon structure with metal–semiconductor junction to eliminate minority-carrier storage delay, enabling zero reverse recovery charge and ultra-low switching losses. Its 100 V repetitive peak reverse voltage and 50 A surge rating support operation in flyback, buck, and boost topologies with fast transient loads.

Thermal design is enabled by low R_th(j-l) of 20 °C/W (SMA Flat) and stable leakage current (<0.5 mA at 125 °C, 100 V), allowing reliable operation without forced cooling in ambient temperatures up to 125 °C when mounted on minimal copper area.

Key Specifications

Pinout & Package

STPS1H100AF is housed in an SMA Flat surface-mount package (ECOPACK2 halogen-free, lead-free), featuring a single cathode band marking and two terminals: Anode and Cathode. The low-profile, flat geometry enhances thermal coupling to PCB copper and reduces board height in slim power modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SB1100-TB and SS110HE3/5BT, STPS1H100AF uniquely combines 175 °C junction rating, 0.62 V low V_F, and 108 W avalanche capability in the space-saving SMA Flat package-making it optimal for thermally demanding, high-reliability 100 V rectification where efficiency and ruggedness are co-prioritized.

Availability

STPS1H100AF is available at Aetrix Electronics and suitable for LED lighting power supplies, telecom DC/DC converters, and USB-C PD adapters requiring stable component supply, consistent ECOPACK2 compliance, and verified thermal performance across production batches.

Supply support for STPS1H100AF 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.

STPS1H100AF belongs to ST's high-efficiency Schottky rectifier product line, engineered specifically for miniaturized, high-frequency switched-mode power supplies where low forward drop, thermal resilience, and avalanche robustness are mandatory.

FAQ

What is the maximum allowable PCB copper area for thermal performance without a heatsink?

With STPS1H100AF in SMA Flat package, a minimum of 50 mm² total copper area (25 mm² per lead) on 35 µm FR4 achieves R_th(j-a) ≈ 65 °C/W at δ = 0.5, enabling full 1 A load at 70 °C ambient. Larger copper (≥100 mm²) further improves margin but is not required for nominal operation.

Does STPS1H100AF support reflow soldering per JEDEC J-STD-020?

Yes. STPS1H100AF is qualified for lead-free reflow per JEDEC J-STD-020D, with peak temperature up to 260 °C for 30 seconds. Its ECOPACK2 construction ensures mechanical integrity and intermetallic formation control during standard Pb-free reflow profiles.

How does its avalanche rating compare to standard 100 V Schottky diodes?

Unlike most 100 V Schottkys-which lack rated avalanche capability-STPS1H100AF specifies 108 W peak avalanche power at 10 µs and 125 °C. This enables direct replacement of TVS-diode + rectifier combinations in cost-sensitive, space-constrained SMPS outputs subject to inductive kick.

Can STPS1H100AF replace STPS1H100U in SMB package?

No-pin-compatible replacement is not possible due to different footprints (SMA Flat vs. SMB). While both share identical electrical specs, STPS1H100AF requires redesign of the PCB land pattern and thermal relief. Use only when the lower profile and improved R_th(j-l) justify layout revision.