STMicroelectronics STPS1H100A

Overview

STPS1H100A from STMicroelectronics is a 100 V, 1 A surface-mount Schottky rectifier in SMA 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), negligible switching losses, and avalanche-rated operation up to 108 W (10 µs pulse). Its 175 °C maximum junction temperature supports compact thermal design in telecom power supplies.

For engineers reviewing the STPS1H100A datasheet, STPS1H100A pinout, STPS1H100A application, or STPS1H100A equivalent, key selection criteria include forward voltage vs. temperature behavior, reverse leakage at 125 °C, thermal resistance (R_th(j-l) = 30 °C/W), and ECOPACK2 halogen-free compliance for lighting and industrial power systems.

Technical Context

This Schottky diode uses a platinum-silicide barrier structure to achieve low VF while maintaining controlled leakage across temperature. Its avalanche capability is fully specified (108 W, 10 µs, T_j = 125 °C), enabling robust transient handling without external snubbers in flyback or buck-derived topologies.

The device operates with δ = 0.5 duty cycle up to 150 °C ambient in SMA package, supported by validated thermal models for FR4 PCB copper area (R_th(j-a) = 100–200 °C/W depending on pad size). Junction-to-lead thermal resistance is fixed at 30 °C/W, enabling accurate conduction loss estimation via P = 0.54 × I_F(AV) + 0.08 × I_F(RMS)².

Key Specifications

Pinout & Package

STPS1H100A is housed in an SMA (DO-214AC) surface-mount package with two terminals: anode and cathode. The cathode is marked by a band on the body. Thermal performance relies on PCB copper area under leads; recommended footprint matches Figure 16 in DS1228 Rev 8.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SS110 and SB1100, STPS1H100A uniquely balances VF, IR, and avalanche robustness within a single 175 °C-rated SMA package-enabling reliable operation in high-ambient, high-reliability power rails where leakage, thermal headroom, and transient immunity are co-constrained.

Availability

STPS1H100A is available at Aetrix Electronics and suitable for telecom DC/DC converters, LED driver secondary stages, and USB-C PD adapter designs requiring stable component supply and long-term industrial lifecycle support.

Supply support for STPS1H100A 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.

STPS1H100A belongs to ST's high-voltage Schottky rectifier product line, engineered specifically for high-frequency, high-efficiency power conversion in space-constrained applications such as lighting ballasts, telecom bricks, and portable chargers.

FAQ

What is the maximum allowable PCB copper area for optimal thermal performance of STPS1H100A in SMA package?

Per Figure 11 in DS1228 Rev 8, R_th(j-a) drops from 200 °C/W to 100 °C/W as total copper area under both leads increases from 0 cm² to 200 cm² on 35 µm FR4. For 1 A continuous operation at 70 °C ambient, ≥50 cm² (e.g., 10 mm × 50 mm thermal pad per lead) achieves T_j ≈ 135 °C - staying 40 °C below absolute maximum.

Does STPS1H100A support reflow soldering per JEDEC J-STD-020, and what is its MSL rating?

Yes - STPS1H100A is rated MSL Level 1 per JEDEC J-STD-020, meaning it is moisture-insensitive and can be stored indefinitely at ≤30 °C/60% RH without baking. Peak reflow temperature is 260 °C (max 10 seconds), compatible with standard lead-free profiles using the recommended SMA footprint in Figure 16.

How does the avalanche rating of STPS1H100A compare to standard Schottky diodes without avalanche specification?

Unlike most Schottkys, STPS1H100A specifies P_ARM = 108 W for 10 µs pulses at T_j = 125 °C. Standard equivalents (e.g., 1N5819) lack this rating and may fail catastrophically under similar surge conditions - making STPS1H100A suitable for unregulated inputs or transformer saturation scenarios where energy absorption is critical.

Can STPS1H100A be used in place of a 1 A, 100 V fast recovery diode in a 100 kHz flyback converter?

Yes - its zero reverse recovery charge eliminates turn-off switching loss and associated EMI, improving efficiency by 0.8–1.2% over fast recovery diodes like UF4007. However, verify reverse leakage at max system T_a; at 85 °C ambient, IR remains < 0.15 mA, well within typical flyback feedback stability margins.