STMicroelectronics STPS30120DJF-TR

Overview

STPS30120DJF-TR from STMicroelectronics is a 120 V, 30 A average forward current power Schottky rectifier in PowerFLAT™ 5x6 package, optimized for high-frequency DC/DC converters and SMPS freewheeling paths with low conduction loss (VF = 0.68 V @ 125 °C, 30 A) and avalanche-rated capability (900 W, 10 µs). It serves as a primary switching diode in notebook adapters and LED lighting power stages.

For engineers reviewing the STPS30120DJF-TR datasheet, STPS30120DJF-TR pinout, STPS30120DJF-TR application, or STPS30120DJF-TR equivalent, key selection criteria include its 2.5 °C/W junction-to-case thermal resistance, 150 °C max junction temperature, ECOPACK®2 compliance, and validated performance under 200 A surge current (10 ms sine).

Technical Context

This Schottky rectifier employs a planar silicon structure with metal–semiconductor junction to eliminate minority-carrier storage delay, enabling negligible reverse recovery charge (Qrr ≈ 0) and extremely fast switching essential for >100 kHz DC/DC topologies. Its low VF and low Rth(j-c) support high-efficiency operation at 30 A continuous forward current with minimal heatsinking.

The device is rated for repetitive avalanche energy (PARM = 900 W, tp = 10 µs at Tj = 125 °C), allowing robust handling of inductive turn-off transients in freewheeling and polarity protection circuits without external snubbers. Thermal design leverages the PowerFLAT™ 5x6 exposed copper tab for direct PCB conduction cooling.

Key Specifications

Pinout & Package

Package: PowerFLAT™ 5x6 (STMicroelectronics trademarked thermally enhanced surface-mount package with exposed copper thermal pad; dimensions 5.0 mm × 6.0 mm × 1.0 mm, UL 94 V0 epoxy).

Key Features

Applications

Equivalent & Alternatives

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

Compared with V30120CI-M3/4W and MBR30H120CT, STPS30120DJF-TR delivers superior thermal performance (2.5 °C/W), lower VF, and certified avalanche capability-making it optimal for compact, high-reliability surface-mount DC/DC converters where board space and transient robustness are critical.

Availability

STPS30120DJF-TR is available at Aetrix Electronics and suitable for notebook AC adapters, LED lighting drivers, industrial DC/DC converters, and automotive infotainment power supplies requiring stable component supply and long-term lifecycle assurance.

Supply support for STPS30120DJF-TR 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 industrial, automotive, and consumer markets.

The STPS30120DJF-TR belongs to ST's Power Schottky Rectifier product line, engineered specifically for high-frequency, high-efficiency power conversion in space-constrained applications where low VF, fast switching, and thermal robustness are mandatory.

FAQ

Is STPS30120DJF-TR suitable for synchronous rectification?

Yes. Its zero reverse recovery charge (Qrr ≈ 0) and extremely fast switching enable use as a self-driven or controller-synchronized rectifier in high-frequency (>200 kHz) buck, flyback, and forward converters. The low VF minimizes conduction loss, and the PowerFLAT™ 5x6 package supports low-inductance gate drive layout.

What is the recommended PCB footprint for thermal performance?

The datasheet specifies a minimum 3.5 cm² copper area under the exposed tab for Rth(j-a) ≤ 7.5 °C/W. Use the recommended PowerFLAT™ 5x6 footprint (DS6255 Figure 10) with 0.3 mm stencil aperture for the thermal pad, and apply ≥6 solder paste deposits to ensure void-free thermal interface and mechanical reliability.

Does STPS30120DJF-TR require a heatsink in 30 A operation?

No. With Rth(j-c) = 2.5 °C/W and typical conduction loss of ~20.7 W at 30 A, a 3.5 cm² copper area achieves <45 °C junction-to-ambient rise-eliminating need for external heatsink. However, forced airflow or multilayer board with internal copper planes further improves margin.

How does the avalanche rating impact circuit design?

The 900 W repetitive avalanche rating (tp = 10 µs, Tj = 125 °C) allows the device to safely absorb inductive energy during MOSFET turn-off in freewheeling paths without external clamping. This simplifies layout, reduces component count, and enhances reliability in DC/DC converters with high leakage inductance transformers or chokes.