Diodes Incorporated SBR20E100CT

Overview

SBR20E100CT from Diodes Incorporated is a 20A dual common-cathode Super Barrier Rectifier with 100V peak reverse voltage, 0.85V max forward voltage at 20A/25°C, and 0.1mA max reverse leakage at 100V/25°C. It serves as a high-efficiency output rectifier or freewheeling diode in DC-DC converters and AC-DC adapters operating up to +175°C junction temperature.

For engineers reviewing the SBR20E100CT datasheet, SBR20E100CT pinout, SBR20E100CT application, or SBR20E100CT equivalent, key selection criteria include its ultra-low VF stability across temperature, rugged avalanche capability versus Schottky diodes, TO-220AB thermal resistance (2°C/W junction-to-case), and dual-leg 10A-per-leg rating for balanced current sharing in center-tapped topologies.

Technical Context

This device implements Diodes Incorporated's patented SBR® (Super Barrier Rectifier) technology - a planar MOS-controlled structure that achieves Schottky-like forward conduction with significantly improved reverse blocking and avalanche robustness. Unlike conventional Schottkys, it avoids catastrophic failure under repetitive surge stress due to its controlled carrier injection and built-in drift region.

The dual common-cathode configuration enables independent anode control for synchronous rectification or interleaved converter stages. Its low R_θJC (2°C/W) and rated 250A non-repetitive surge current support high-power transient handling in compact heatsinked designs without derating penalties typical of standard fast recovery diodes.

Key Specifications

Pinout & Package

Package: TO-220AB - Molded plastic case with UL 94V-0 flammability rating, matte tin-plated copper leadframe, and 1.85g mass. Mounting tab is cathode-connected and electrically active.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-20CPH06-M3 and MUR20100CT, the SBR20E100CT uniquely balances 100V rating, sub-0.85V conduction, and TO-220AB compatibility - making it optimal for thermally constrained, medium-voltage industrial power supplies where reliability under surge and high temperature is critical.

Availability

SBR20E100CT is available at Aetrix Electronics and suitable for DC-DC converters, AC-DC adapters, and industrial motor drives requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for SBR20E100CT 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, manufacturing, and sales operations across Asia, Europe, and North America.

The SBR® product line targets high-efficiency power conversion applications where Schottky limitations in voltage rating and ruggedness must be overcome - specifically engineered for server PSUs, telecom rectifiers, and automotive DC-DC stages.

FAQ

Is SBR20E100CT pin-compatible with standard TO-220AB dual-diode packages?

Yes - it uses the industry-standard TO-220AB outline with Anode 1 (lead 1), Cathode (tab & lead 2), and Anode 2 (lead 3). Pin spacing, hole pattern, and tab dimensions match AP02002 mechanical spec. No PCB redesign is needed when upgrading from legacy dual Schottky or fast recovery devices in the same footprint.

What is the maximum continuous current per leg without heatsinking?

At T_A = +25°C with no heatsink, the device is limited to ~3.5A per leg (7A total) due to R_θJA = 7°C/W. Exceeding this causes junction temperature to exceed 175°C even at room ambient. For >10A operation, a minimum 50×50×23 mm aluminum heatsink is required per datasheet Note 5.

Does SBR20E100CT require derating for capacitive loads?

Yes - the datasheet specifies a 20% current derating for capacitive loads. At full-rated 10A/leg, the effective limit becomes 8A/leg when driving bulk capacitance directly after rectification. This accounts for peak current stress during capacitor charging transients, which increases I²t stress beyond resistive-load conditions.

How does its avalanche capability compare to Schottky diodes in real-world surge events?

Unlike Schottky diodes - which fail catastrophically under single-event avalanche - the SBR20E100CT sustains repetitive 250A/8.3ms surges without parameter shift. Its patented structure limits localized heating during avalanche, enabling reliable operation in unregulated input stages or regenerative braking circuits where surge events occur hundreds of times daily.