STMicroelectronics STPS1H100U

Overview

STPS1H100U from STMicroelectronics is a 100 V, 1 A surface-mount Schottky rectifier in SMB package, optimized for high-frequency DC/DC converters and AC/DC adapters. It delivers low forward voltage drop (0.62 V max at 125 °C, 1 A), negligible switching losses, and avalanche-rated operation up to 108 W (10 µs pulse). Its 175 °C maximum junction temperature and low leakage current (0.5 mA max at 125 °C) support compact, thermally constrained telecom and LED lighting power stages.

For engineers reviewing the STPS1H100U datasheet, STPS1H100U pinout, STPS1H100U application, or STPS1H100U equivalent, key selection criteria include its SMB footprint compatibility, thermal resistance (R_th(j-l) = 25 °C/W), conduction loss equation (P = 0.54 × I_F(AV) + 0.08 × I_F(RMS)²), and ECOPACK2 halogen-free compliance for industrial and lighting designs.

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 (Q_rr ≈ 0) and high-frequency operation beyond 1 MHz. Its low VF–IR trade-off is achieved via controlled barrier height and epitaxial doping profile.

The device supports avalanche energy handling (108 W, 10 µs, T_j = 125 °C) and operates reliably across –65 °C to +175 °C ambient range when mounted on FR4 PCB with ≥5 cm² copper per lead. Thermal impedance curves confirm stable junction-to-ambient performance under pulsed loads typical of flyback and buck converter secondary-side rectification.

Key Specifications

Pinout & Package

SMB package: Surface-mount, 2-terminal, cathode-banded, UL94 V0 epoxy, lead-free, ECOPACK2 compliant. Dimensions: 3.30–3.95 mm (D) × 5.10–5.60 mm (E) × 1.90–2.45 mm (A1), weight 0.107 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SB1100-T and SS110HE3/5AT, STPS1H100U offers the optimal balance of low V_F, high T_j(max), and specified avalanche capability-making it preferred for thermally aggressive, high-reliability telecom and lighting applications where both efficiency and ruggedness are required.

Availability

STPS1H100U is available at Aetrix Electronics and suitable for LED lighting drivers, telecom DC/DC converters, and USB-C PD adapters requiring stable component supply, consistent SMB footprint compatibility, and long-term industrial lifecycle support.

Supply support for STPS1H100U 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, power, MCU, and sensor solutions for automotive, industrial, and consumer markets.

STPS1H100U belongs to ST's high-performance Schottky rectifier product line, engineered specifically for high-frequency, high-efficiency power conversion in space- and thermally-constrained applications such as LED drivers and telecom infrastructure.

FAQ

What is the maximum allowable PCB copper area for optimal thermal performance in SMB package?

For STPS1H100U in SMB package, thermal resistance junction-to-ambient (R_th(j-a)) drops from ~50 °C/W (no copper) to ~25 °C/W with ≥5 cm² of 35 µm-thick copper per lead on FR4 board, as confirmed in Figure 10 of DS1228 Rev 8. Larger copper areas yield diminishing returns beyond 10 cm².

Does STPS1H100U support reflow soldering per JEDEC J-STD-020?

Yes-STPS1H100U is qualified for lead-free reflow per JEDEC J-STD-020D, with peak temperature up to 260 °C (10-second duration). Its ECOPACK2 construction and UL94 V0 epoxy ensure reliability through standard Pb-free reflow profiles without delamination or voiding.

How is avalanche energy rating validated for STPS1H100U?

STPS1H100U's 108 W avalanche power rating is measured under controlled 10 µs pulses at T_j = 125 °C (Table 1, DS1228 Rev 8). It reflects single-pulse non-repetitive capability-not continuous operation-and is validated using standardized IEC 61000-4-5 surge test waveforms applied across the device terminals.

Can STPS1H100U replace a standard PN rectifier in an existing 100 V design?

Yes-STPS1H100U is a direct drop-in replacement for PN rectifiers like 1N5819 in SMB footprint, offering lower V_F, zero Q_rr, and higher T_j(max). However, verify that reverse voltage transients remain below 100 V, as Schottky devices have lower V_RRM headroom than equivalent PN types.