Diodes Incorporated SBR40U150CT-G

Overview

SBR40U150CT-G from Diodes Incorporated is a 40A dual common-cathode super barrier rectifier in TO-220AB package, rated for 150V peak reverse voltage and 150°C junction temperature, with ultra-low 0.80V forward voltage at 20A/25°C - optimized for high-efficiency AC/DC and DC/DC secondary-side rectification in server power supplies and telecom rectifiers.

For engineers reviewing the SBR40U150CT-G datasheet, SBR40U150CT-G pinout, SBR40U150CT-G application, or SBR40U150CT-G equivalent, key selection criteria include forward voltage drop at elevated temperature, thermal resistance (RθJC = 0.6°C/W), surge current rating (250A), RoHS-compliant lead-free finish, and TO-220AB mechanical compatibility with standard heatsinks.

Technical Context

This dual-leg SBR rectifier integrates two independent 20A-rated super barrier diodes sharing a common cathode terminal, enabling synchronous-like low-loss operation without gate drive complexity. Its patented super barrier structure replaces traditional PN junctions with metal-semiconductor interfaces to achieve lower VF and superior high-temperature leakage stability versus Schottky or fast recovery diodes.

Designed for continuous conduction mode (CCM) and critical conduction mode (CRM) topologies, it delivers soft, fast switching with minimal reverse recovery charge (Qrr not specified but implied by soft-switching claim), supporting high-frequency operation up to 100kHz while maintaining <100μA leakage at 150V/125°C.

Key Specifications

Pinout & Package

Package: TO-220AB, 3-terminal plastic case with isolated mounting tab; matte tin-plated copper leadframe; UL 94V-0 rated molding compound; weight ≈1.85 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-40CPH015 and MUR4015CT, SBR40U150CT-G delivers the lowest system-level thermal resistance and highest temperature-stable VF - making it optimal for space-constrained, high-ambient industrial and datacenter power where thermal headroom is critical.

Availability

SBR40U150CT-G is available at Aetrix Electronics and suitable for server power supplies, telecom rectifier modules, industrial motor drive auxiliary supplies, and renewable energy inverter gate driver supplies requiring stable component supply across multi-year production cycles.

Supply support for SBR40U150CT-G 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, with design centers across Asia and manufacturing in China, Taiwan, and the Philippines.

SBR® Super Barrier Rectifiers were developed to replace Schottky diodes in high-current, high-temperature rectification roles - targeting efficiency-critical secondary-side applications in computing, communications, and industrial power systems.

FAQ

What is the maximum allowable case temperature for continuous operation?

The TO-220AB package supports continuous operation with case temperature up to 150°C, matching the rated junction temperature. Derating begins above 25°C ambient per Figure 3 - at 100°C ambient, maximum average forward current per leg drops to 12A with a properly mounted heatsink (RθJA = 10.6°C/W).

Is pin 2 electrically functional or a dummy terminal?

Pin 2 is a non-functional, isolated terminal - it is physically present in the TO-220AB leadframe but has no internal connection. The device operates using only the tab (anodes) and pin 1 (common cathode); pin 2 must not be soldered or used as a current path.

How does the SBR technology differ from standard Schottky rectifiers?

SBR uses a patented metal-semiconductor barrier structure with graded doping and interface engineering to achieve lower forward voltage than Schottky diodes at high current, while suppressing thermally induced leakage - unlike Schottky, it maintains <100μA IR at 125°C/150V, avoiding thermal runaway in high-temp environments.

Can SBR40U150CT-G be used in place of a single 40A Schottky diode?

No - it is a dual-leg common-cathode device with two independent 20A anodes (on the tab) and one shared cathode (pin 1). To replace a single 40A Schottky, both anode paths must be paralleled externally, and the cathode routed to the same net; layout symmetry is critical to ensure current sharing.