STMicroelectronics STPS3L60RL

Overview

STPS3L60RL from STMicroelectronics is a 60 V, 3 A axial-lead Schottky rectifier in DO-201AD package, designed for high-frequency switching applications including SMPS, DC/DC converters, and LED lighting. It delivers low forward voltage drop (0.53 V typ. at 3 A, 100 °C), negligible switching losses, avalanche rating, and operates up to 150 °C junction temperature.

For engineers reviewing the STPS3L60RL datasheet, STPS3L60RL pinout, STPS3L60RL application, or STPS3L60RL equivalent, key selection criteria include forward voltage at operating current/temperature, thermal resistance (R_th(j-l) = 20 °C/W), avalanche power capability (144 W), and DO-201AD mechanical compatibility in space-constrained battery chargers and telecom power supplies.

Technical Context

This Schottky rectifier uses a planar silicon structure optimized for low conduction loss and fast recovery without minority-carrier storage. Its zero-recovery characteristic eliminates reverse recovery charge (Q_rr ≈ 0), enabling efficient operation in high-frequency (>100 kHz) topologies such as synchronous buck and flyback converters.

The device is avalanche-rated per IEC 61000-4-5 surge immunity requirements, with P_ARM = 144 W at t_p = 10 µs and T_j = 125 °C. Thermal design relies on junction-to-lead resistance (20 °C/W) and requires direct lead soldering to PCB copper for effective heat dissipation in DO-201AD mounting.

Key Specifications

Pinout & Package

Packaged in DO-201AD axial-lead configuration: cathode indicated by band, anode at opposite end. Leads are tinned copper, compatible with wave and hand soldering. Mechanical envelope: 9.5 mm body length, 5.3 mm diameter, 1.3 mm lead diameter, 25.4 mm lead spacing.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MBR360RLG, STPS3L60RL offers lower V_F and better thermal resistance, enabling higher efficiency in compact designs; versus VS-3EY60-M3/54, it trades automotive qualification for lower cost and broader commercial availability without sacrificing core electrical performance.

Availability

STPS3L60RL is available at Aetrix Electronics and suitable for telecom battery chargers, USB-C PD adapters, industrial SMPS auxiliary supplies, and LED driver input rectification requiring stable component supply across production lifecycles.

Supply support for STPS3L60RL 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, microcontroller, and sensor solutions for industrial, automotive, and consumer markets.

The STPS series targets high-efficiency, high-reliability power conversion with Schottky rectifiers optimized for low V_F, avalanche ruggedness, and multiple package options-including axial DO-201AD for legacy-compatible, cost-sensitive designs.

FAQ

What is the maximum allowable ambient temperature for STPS3L60RL at 3 A continuous current?

At I_F(AV) = 3 A and T_L = 105 °C (lead temperature), the datasheet specifies a maximum ambient temperature of approximately 65 °C for DO-201AD mounting on standard FR4 PCB with 10 mm lead length. This assumes R_th(j-a) ≈ 80 °C/W and accounts for 20 °C/W junction-to-lead resistance plus PCB thermal path. Derating is required above this ambient.

Does STPS3L60RL require a heatsink in typical 3 A SMPS applications?

No external heatsink is required. With proper PCB layout-using ≥10 mm lead length and ≥1 cm² copper pour per lead-the DO-201AD package achieves sufficient thermal dissipation. At 3 A and 100 °C junction, power dissipation is ~1.6 W; the 20 °C/W R_th(j-l) limits lead temperature rise to ~32 °C, keeping case temperature within safe limits without added thermal mass.

How does the avalanche rating of STPS3L60RL improve system reliability?

The 144 W avalanche power rating (t_p = 10 µs, T_j = 125 °C) allows the diode to safely absorb inductive energy from transformer leakage or layout parasitics during switching transitions. This eliminates need for external RC snubbers in flyback or forward converters, reducing component count and failure points while maintaining consistent performance over lifetime.

Can STPS3L60RL be used in place of a standard PN junction rectifier in an existing design?

Yes-STPS3L60RL is a direct replacement for 60 V/3 A PN rectifiers like 1N5408 in high-frequency applications, offering lower V_F, zero Q_rr, and improved efficiency. However, its higher reverse leakage (up to 15 mA at 100 °C) may increase standby power in offline PSUs; verify no-load consumption meets regulatory limits before substitution.