Diodes Incorporated SBRT3U40P1-7

Overview

SBRT3U40P1 from Diodes Incorporated is a 3A, 40V Trench Super Barrier Rectifier (SBR®) in PowerDI123 package, featuring ultra-low 0.49V max forward voltage at 3A/25°C, 180µA max reverse leakage at 40V/125°C, and 14ns reverse recovery time. It serves as a high-efficiency rectifier in MR16 LED driver bridge configurations where thermal stability and low conduction loss are critical.

For engineers reviewing the SBRT3U40P1 datasheet, SBRT3U40P1 pinout, SBRT3U40P1 application, or SBRT3U40P1 equivalent, key selection criteria include its 35°C/W junction-to-case thermal resistance, 138°C/W junction-to-ambient rating on FR-4, <1.1mm profile for space-constrained lighting modules, and AEC-Q101-qualified variant (SBRT3U40P1Q) for automotive-grade reliability validation.

Technical Context

The SBRT3U40P1 employs patented Trench SBR® technology to achieve lower VF than Schottky diodes while maintaining superior high-temperature IR stability-critical for MR16 halogen/LED retrofit applications operating up to +150°C ambient. Its 75A non-repetitive surge rating supports inrush current handling during cold-start conditions.

Designed for single-phase half-wave rectification with resistive/inductive loads, it requires 20% IO derating under capacitive loading. The PowerDI123 package delivers 1.0mm typical height and 3.7mm × 2.8mm footprint, enabling direct replacement of SMA/SMB in thermally demanding, low-profile lighting PCBs.

Key Specifications

Pinout & Package

Package: PowerDI123 - Thermally enhanced molded plastic case with exposed cathode metal tab (pin 2 & 3 electrically common), 1.0mm profile, UL 94V-0 rated, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SBRT3U40P1, the SBRT3U40P1Q offers identical performance with automotive qualification overhead, while SS34H trades higher leakage and taller packaging for lower unit cost-making SBRT3U40P1 optimal for thermally constrained, reliability-critical MR16 and industrial 24V systems.

Availability

SBRT3U40P1 is available at Aetrix Electronics and suitable for MR16 LED retrofit drivers, industrial 24V DC input protection circuits, and low-profile AC/DC adapter output stages requiring stable component supply, thermal robustness, and RoHS/Green compliance.

Supply support for SBRT3U40P1 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-efficiency power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.

The SBRT3U40P1 belongs to Diodes' Trench SBR® rectifier product line, engineered specifically to replace Schottky and standard PN diodes in high-reliability, high-temperature lighting and power conversion applications where low VF and stable IR are jointly essential.

FAQ

What is the maximum continuous operating temperature for SBRT3U40P1?

The SBRT3U40P1 has an operating junction temperature range of –65°C to +150°C. Its thermal resistance (RθJA = 138°C/W on FR-4) means sustained 3A operation requires careful PCB layout-minimum 1-inch² 2oz copper pour under the cathode tab is recommended to maintain TJ ≤ 125°C at +85°C ambient.

Can SBRT3U40P1 replace a standard 1N5822 Schottky diode?

Yes, SBRT3U40P1 is a direct functional replacement for 1N5822 (3A/40V Schottky) in most applications, offering lower VF (0.49V vs. 0.55V) and dramatically lower IR at high temperature (180µA vs. ~1mA at 125°C). However, its PowerDI123 footprint differs from DO-201AD, requiring PCB redesign-not drop-in.

Is the cathode tab electrically isolated from the PCB ground plane?

No-the cathode tab (Pins 2 & 3) is electrically common with the cathode terminal and must be soldered directly to a PCB copper area serving as both electrical return and thermal path. It is not insulated; isolation requires a thermal pad with dielectric layer, which degrades RθJC and is not recommended per Diodes' layout guidelines.

Does SBRT3U40P1 support reflow soldering per J-STD-020?

Yes-SBRT3U40P1 is rated for moisture sensitivity level 1 (MSL-1) and qualified for standard Pb-free reflow profiles per J-STD-020. Peak temperature must not exceed 260°C, and the device may be subjected to unlimited floor life without baking due to its MSL-1 classification.