Diodes Incorporated SBRT30U45CT

Overview

SBRT30U45CT from Diodes Incorporated is a 30A dual-leg Trench Super Barrier Rectifier (SBR) in TO-220AB package, rated for 45V peak reverse voltage, 0.5V max forward voltage at 15A/25°C, and 0.4mA max reverse leakage at 45V/125°C. It serves as a high-efficiency rectifier or freewheel diode in DC-DC converters and AC-DC adapters.

For engineers reviewing the SBRT30U45CT datasheet, SBRT30U45CT pinout, SBRT30U45CT application, or SBRT30U45CT equivalent, key selection criteria include ultra-low VF at high current, stable IR up to +125°C, thermal resistance of 2°C/W (junction-to-case), TO-220AB mechanical compatibility, and RoHS/Green compliance.

Technical Context

This dual-common-cathode SBR uses trench-based super barrier technology to achieve lower forward voltage than standard Schottky diodes while maintaining superior high-temperature reverse leakage performance. Its architecture enables stable operation up to +150°C junction temperature with minimal thermal runaway risk.

The device is optimized for switching power supply topologies requiring fast recovery, low conduction loss, and robust thermal behavior under sustained load. Each leg supports 15A average rectified current, with 250A non-repetitive surge capability per leg and 2°C/W thermal resistance when mounted on a specified heatsink.

Key Specifications

Pinout & Package

Packaged in industry-standard TO-220AB housing with three terminals: two anodes (A1, A2) and one common cathode (K). The case is electrically isolated and designed for direct heatsink mounting via the metal tab.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-efficiency rectifier applications.

Compared with SBRT30U45CTFP, this TO-220AB variant offers better thermal performance (2 vs. 4°C/W) but larger height; versus MBR3045CT, it delivers 22% lower VF and 73% less IR at 125°C-critical for thermally demanding, high-reliability systems.

Availability

SBRT30U45CT is available at Aetrix Electronics and suitable for DC-DC converters, AC-DC adapters, and industrial power supplies requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for SBRT30U45CT 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-performance power management, signal integrity, and protection solutions.

The TrenchSBR product line targets high-efficiency power conversion applications where low VF and stable high-temperature leakage are critical-especially in compact, thermally constrained AC-DC and DC-DC systems.

FAQ

What is the maximum junction temperature for continuous operation?

The SBRT30U45CT supports continuous operation up to +150°C junction temperature. Its thermal design-combined with 2°C/W RθJC and stable IR up to that limit-enables reliable use in sealed enclosures or high-ambient environments without derating below rated current.

Is SBRT30U45CT suitable for synchronous rectification circuits?

No-it is a passive rectifier, not a synchronous MOSFET controller or driver. However, its ultra-low VF and fast recovery make it ideal as a high-efficiency replacement for Schottky diodes in non-synchronous flyback, forward, or LLC secondary-side rectification where gate drive complexity must be avoided.

How does the dual-leg configuration affect PCB layout?

The dual-anode/common-cathode structure allows independent AC-side routing for each leg while sharing a single DC output node. This reduces copper area, simplifies filter capacitor placement, and minimizes loop inductance compared to two discrete TO-220 devices-improving EMI performance in high-frequency converters.

Can SBRT30U45CT replace standard silicon rectifiers in legacy designs?

Yes-if the original design used a 30A dual-diode module (e.g., 30CPQ045) or two 15A discrete diodes. Its 45V VRRM, 0.5V VF, and TO-220AB footprint ensure direct mechanical and electrical compatibility, while delivering measurable efficiency gains and cooler operation without circuit modification.