Diodes Incorporated SBR40U60CT

Overview

SBR40U60CT from Diodes Incorporated is a 40A dual common-cathode super barrier rectifier in TO-220AB package, rated for 60V peak repetitive reverse voltage, with ultra-low 0.55V typical forward voltage at 20A/25°C and 150°C maximum junction temperature-used in high-efficiency AC/DC secondary-side rectification for telecom power supplies.

For engineers reviewing the SBR40U60CT datasheet, SBR40U60CT pinout, SBR40U60CT application, or SBR40U60CT equivalent, key selection criteria include forward voltage drop at high current and temperature, thermal resistance (2°C/W), leakage current at 125°C, soft switching behavior, and RoHS/Green compliance status.

Technical Context

This dual-leg super barrier rectifier integrates two independent anode terminals sharing one cathode, enabling synchronous-like low-loss rectification without gate drive circuitry. Its patented structure delivers lower VF than Schottky diodes while maintaining higher VRRM and superior high-temperature leakage stability.

Designed for single-phase, half-wave rectification with resistive or inductive loads, it requires 20% current derating under capacitive loading. Thermal performance is defined by RθJC = 2°C/W per leg, supporting high-power density designs when mounted to heatsinks with low thermal interface resistance.

Key Specifications

Pinout & Package

TO-220AB package with isolated tab (cathode-connected), 3-terminal configuration: Pin 1 (Anode 1), Pin 2 (Cathode), Pin 3 (Anode 2). Tab is electrically connected to cathode and must be insulated if mounted to grounded heatsink.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-current, low-VF rectifier applications.

Compared with SBRT40U60CT, the SBR40U60CT offers identical performance but lacks formal halogen-free certification; versus STPS40H60CG, it delivers 12× lower high-temp leakage and 0.07V lower VF-critical for efficiency-critical telecom and server power.

Availability

SBR40U60CT is available at Aetrix Electronics and suitable for telecom power supplies, server VRMs, industrial motor drive auxiliary supplies, and LED driver secondary-side rectification requiring stable component supply and long-term production continuity.

Supply support for SBR40U60CT 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, headquartered in Plano, Texas, serving automotive, industrial, computing, and consumer markets with high-reliability components.

The SBR® Super Barrier Rectifier product line targets high-efficiency secondary-side rectification in AC/DC and DC/DC converters where Schottky limitations (leakage, VRRM) and FRD losses are unacceptable.

FAQ

What is the thermal resistance from junction to case (RθJC) for SBR40U60CT?

The datasheet specifies RθJC = 2°C/W per leg. This value is measured under standardized JEDEC conditions with the tab fully soldered to a copper pad. Real-world mounting-using thermal paste, mica washers, or insufficient torque-can increase effective RθJC by 1.5–3×, directly impacting maximum sustainable current.

Can SBR40U60CT replace a standard fast recovery diode in a PFC boost stage?

No. The SBR40U60CT is rated for 60V VRRM and optimized for low-VF secondary-side rectification-not high-voltage, high-dV/dt PFC switching. Its 60V rating is insufficient for typical 380–400V DC-link PFC stages, where 600V+ devices are required.

Is the cathode tab electrically isolated from the leads?

No-the metal tab is internally bonded to Pin 2 (cathode) and is not isolated. When mounting to a heatsink, use an insulating pad or shoulder washer if the heatsink is grounded or at a different potential than the cathode net to prevent short circuits.

Does SBR40U60CT support parallel operation of both legs for 40A single-anode applications?

No. The device has two independent anodes (Pins 1 and 3) and one shared cathode (Pin 2). It is not designed for paralleling legs-each leg must be driven separately, such as in center-tapped transformer or dual-output configurations. Forcing both anodes to the same node violates internal layout assumptions and may cause current imbalance.