STMicroelectronics STPS1230SF

Overview

STPS1230SF from STMicroelectronics is a 30 V, 12 A average forward current Schottky barrier rectifier in PSMC (TO-277A) package, optimized for high-frequency DC/DC converters and reverse battery protection. It delivers low forward voltage drop (0.40 V typ. at 12 A, 125 °C), 150 °C max junction temperature, and avalanche capability up to 90 W (10 µs pulse). Used in telecom power supplies and SSD power rails.

For engineers reviewing the STPS1230SF datasheet, STPS1230SF pinout, STPS1230SF application, or STPS1230SF equivalent, key selection criteria include forward voltage at high temperature, surge current rating (230 A), thermal resistance (2 °C/W junction-to-case), wettable flanks for automated optical inspection, and ECOPACK®2 compliance for RoHS and halogen-free requirements.

Technical Context

This Schottky rectifier uses a planar silicon structure with metal–semiconductor junction optimized for minimal conduction loss and fast recovery. Its low VF (0.40 V typ. at 12 A, 125 °C) reduces power dissipation in compact 12 V input DC/DC stages, while the 30 V VRRM rating supports 12 V system-level reverse polarity protection.

The PSMC (TO-277A) package enables direct thermal conduction via the exposed cathode tab, with Rth(j-c) = 2 °C/W and wettable flanks for solder joint integrity verification. Avalanche energy handling (90 W, 10 µs) allows transient overvoltage tolerance without external clamping in battery-connected circuits.

Key Specifications

Pinout & Package

PSMC (TO-277A) is a surface-mount, flat, low-profile package (1.1 mm typ. height) with an exposed cathode thermal pad and two signal terminals. Wettable flanks on all three terminals support automated optical inspection of solder fillets.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-12CTQ030P-M3/45 and SB1230, the STPS1230SF uniquely combines low VF (0.40 V), wettable flanks, and rated 90 W avalanche capability-enabling robust, inspectable, and thermally efficient reverse-polarity protection in high-reliability portable and telecom systems.

Availability

STPS1230SF is available at Aetrix Electronics and suitable for battery charger protection, telecom DC/DC converter output rectification, and SSD power rail isolation requiring stable component supply and long-term industrial lifecycle support.

Supply support for STPS1230SF 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 microcontrollers, power devices, sensors, and analog ICs for industrial, automotive, and consumer markets.

The STPS series targets high-efficiency, high-reliability power conversion with focus on Schottky rectifiers for battery-powered and telecom infrastructure applications where thermal performance and manufacturability are critical.

FAQ

What is the maximum allowable case temperature for continuous 12 A operation?

The datasheet specifies IF(AV) = 12 A at Tc = 120 °C with δ = 0.5 square wave duty cycle. At Tc = 120 °C, the device operates within absolute maximum ratings; sustained case temperatures above this require derating per Figure 1. Thermal design must maintain Tc ≤ 120 °C using ≥4 cm² of 35 µm copper under the cathode tab.

Does STPS1230SF support automatic optical inspection (AOI)?

Yes - the PSMC (TO-277A) package features wettable flanks on all three terminals, enabling reliable solder fillet imaging during AOI. This is confirmed in the "Features" section of the datasheet and validated by ST's package drawing (Figure 8 and Table 4), which specifies controlled plating thickness and geometry for inspection compatibility.

How does the avalanche rating translate to real-world circuit protection?

The 90 W repetitive avalanche rating (tp = 10 µs, Tj = 125 °C) means the device can absorb up to 900 µJ per pulse without failure. In reverse-battery protection, this handles typical 12 V system inductive spikes (e.g., relay coil de-energization) without external clamping, provided pulse repetition rate stays below thermal limits defined by Rth(j-c) = 2 °C/W.

Is ECOPACK®2 compliance verified for STPS1230SF?

Yes - ECOPACK®2 compliance is explicitly stated in Section 2 of the datasheet and confirmed in ST's official ECOPACK® database. It certifies halogen-free epoxy, lead-free terminations, and RoHS compliance per EU Directive 2011/65/EU, with full material declarations available upon request through ST's quality portal.