STMicroelectronics STPS1L30A

Overview

STPS1L30A from STMicroelectronics is a 30 V, 1 A surface-mount Schottky rectifier in SMA package, designed for high-frequency DC/DC converters and synchronous rectification with MOSFETs. It features a typical forward voltage drop of 0.26 V at 125 °C and 1 A, 150 °C maximum junction temperature, and avalanche-rated ruggedness for transient robustness in power supply rails.

For engineers reviewing the STPS1L30A datasheet, STPS1L30A pinout, STPS1L30A application, or STPS1L30A equivalent, key selection criteria include low conduction loss (VF ≤ 0.395 V @ 25 °C), thermal resistance (Rth(j-l) = 30 °C/W), ECOPACK2 compliance, and suitability for compact, thermally constrained 30 V input power stages.

Technical Context

This Schottky rectifier operates as a unidirectional, low-loss freewheeling or output rectifying diode in switching power supplies. Its metal–semiconductor junction enables fast recovery (no minority carrier storage), zero reverse recovery charge (Qrr = 0), and operation up to several MHz without switching loss penalties.

The device is rated for repetitive peak reverse voltage (VRRM) of 30 V and average forward current (IF(AV)) of 1 A under defined thermal conditions (TL = 135 °C for SMA). Its avalanche capability (PARM = 110 W, tp = 10 µs) supports surge immunity in non-isolated buck or flyback secondary-side applications.

Key Specifications

Pinout & Package

STPS1L30A is housed in an SMA (DO-214AC) surface-mount package with cathode band marking. Thermal performance relies on PCB copper area under leads; recommended footprint per DS1243 Rev 8 includes 2.63 mm × 5.43 mm pad layout.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MBR130LSFT1G and SS13, STPS1L30A delivers superior thermal performance (30 °C/W vs. 25–40 °C/W), lower VF at elevated temperature, and verified avalanche capability-making it optimal for compact, high-reliability DC/DC outputs where efficiency and surge immunity are co-prioritized.

Availability

STPS1L30A is available at Aetrix Electronics and suitable for battery chargers, SSD power rails, and telecom DC/DC converters requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.

Supply support for STPS1L30A 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 industrial, automotive, and consumer markets.

STPS1L30A belongs to ST's high-efficiency Schottky rectifier product line, engineered specifically for high-frequency, space-constrained switched-mode power supplies where low VF, thermal robustness, and avalanche tolerance are critical.

FAQ

What is the maximum allowable PCB copper area for optimal thermal performance of STPS1L30A?

Per DS1243 Rev 8 Figure 11, Rth(j-a) drops from ~50 °C/W (no copper) to ~35 °C/W with 1 cm² of 35 µm FR4 copper per lead. For full thermal benefit, ≥2 cm² total copper (1 cm² per lead) is recommended-achieving Rth(j-a) ≈ 25 °C/W in still air.

Can STPS1L30A be used in parallel with a MOSFET for synchronous rectification?

Yes-its low VF, zero Qrr, and fast switching make it ideal for paralleling with N-channel MOSFETs in synchronous rectifier topologies. The device handles reverse recovery stress during MOSFET dead-time and provides fail-safe conduction if gate drive fails.

Is STPS1L30A suitable for automotive applications?

No-STPS1L30A is not AEC-Q101 qualified and lacks automotive-grade screening, extended temperature validation, or PPAP documentation. It is intended for industrial, consumer, and telecom power supplies-not under-hood or safety-critical vehicle systems.

What is the reverse leakage behavior at 85 °C and 30 V reverse bias?

At Tj = 85 °C and VR = 30 V, IR is approximately 3.5 mA (interpolated from Figure 6, between 25 °C and 100 °C curves). This value remains well below 6 mA-the max spec at 100 °C-ensuring low standby power in always-on subsystems.