STMicroelectronics STPS3150RL

Overview

STPS3150RL from STMicroelectronics is a 150 V, 3 A surface-mount Schottky power rectifier in DO-201AD package, designed for high-frequency switching applications including DC/DC converters and notebook adapters. It delivers low forward voltage drop (0.63 V typ. at 125 °C, 3 A), negligible switching losses, and operates up to 175 °C junction temperature.

For engineers reviewing the STPS3150RL datasheet, STPS3150RL pinout, STPS3150RL application, or STPS3150RL equivalent, key selection criteria include reverse voltage rating (150 V), average forward current (3 A), thermal resistance (15 °C/W junction-to-lead), low VF stability over temperature, and ECOPACK2 compliance for environmental design requirements.

Technical Context

This Schottky rectifier uses a planar silicon structure optimized for fast recovery and minimal reverse recovery charge, enabling efficient operation in SMPS topologies above 100 kHz. Its low VF and low thermal resistance (R_th(j-l) = 15 °C/W) reduce conduction loss and simplify thermal management on FR4 PCBs without heatsinks.

The device is rated for repetitive peak reverse voltage of 150 V and surge non-repetitive forward current of 100 A (10 ms sinusoidal), with reverse leakage limited to 2.0 µA at 25 °C and 2.0 mA at 125 °C - critical for maintaining efficiency in battery-powered and adapter applications.

Key Specifications

Pinout & Package

STPS3150RL is housed in the axial DO-201AD package, featuring two leads: anode and cathode. The cathode is marked by a band on the body. This through-hole package provides robust mechanical mounting and high surge current capability (100 A I_FSM).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STPS3150U and STPS3150AFN, STPS3150RL offers superior surge handling (100 A vs. 80/80 A), lower thermal resistance (15 vs. 20 °C/W), and proven mechanical reliability in mixed-technology assemblies - making it optimal for cost-sensitive, high-volume adapter and lighting applications requiring field longevity.

Availability

STPS3150RL is available at Aetrix Electronics and suitable for LED lighting, battery chargers, and DC/DC converters requiring stable component supply, long-term manufacturability, and compliance with global environmental regulations.

Supply support for STPS3150RL 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.

The STPS3150 series belongs to ST's high-efficiency power rectifier product line, engineered specifically for high-frequency SMPS in consumer adapters, LED drivers, and computing power supplies where low VF and thermal resilience are critical.

FAQ

What is the maximum junction temperature and how does it affect layout?

The STPS3150RL has a maximum junction temperature of +175 °C. This allows operation in compact, sealed enclosures without active cooling. To achieve this, the DO-201AD package must be mounted on ≥1 cm² of 35 µm copper per lead, leveraging its 15 °C/W junction-to-lead thermal resistance. Exceeding 130 °C ambient requires thermal vias under pads or external heatsinking.

How does the forward voltage vary with temperature and current?

V_F decreases with rising temperature: 0.78 V typ. at 25 °C/3 A drops to 0.63 V typ. at 125 °C/3 A. At 6 A, V_F is 0.85 V (25 °C) and 0.70 V (125 °C). This negative temperature coefficient improves current sharing in parallel configurations and reduces thermal runaway risk compared to silicon PN diodes.

Is STPS3150RL suitable for synchronous rectification replacement?

Yes - its negligible reverse recovery and low VF make it ideal for replacing MOSFET-based synchronous rectifiers in cost-sensitive or low-duty-cycle applications. Unlike MOSFETs, it requires no gate drive circuitry and avoids shoot-through risks. However, conduction loss remains fixed, so MOSFETs may outperform at very high currents (>5 A) with proper drive.

What are the key mechanical differences between STPS3150RL and STPS3150UF?

STPS3150RL uses the DO-201AD axial package (1.120 g, 1900/reel, 100 A I_FSM), while STPS3150UF uses SMB Flat (0.050 g, 5000/reel, 80 A I_FSM). DO-201AD offers higher surge robustness and better thermal coupling to chassis, whereas SMB Flat enables denser SMT layouts but requires careful pad design to manage thermal stress during reflow.