Diodes Incorporated SBR20A100CT

Overview

SBR20A100CT from Diodes Incorporated is a 20A dual common-cathode Super Barrier Rectifier rated for 100V peak reverse voltage, with typical forward voltage of 0.64V at 10A/125°C and leakage current ≤0.1mA at 100V/25°C. It delivers soft, fast switching and high-temperature stability in TO-220AB package, used in AC-DC front-end rectification for industrial power supplies.

For engineers reviewing the SBR20A100CT datasheet, SBR20A100CT pinout, SBR20A100CT application, or SBR20A100CT equivalent, key selection criteria include forward voltage drop at full load, thermal resistance (2°C/W junction-to-case), surge current rating (250A), and RoHS-compliant lead-free construction with UL 94V-0 molding compound.

Technical Context

This dual-element rectifier integrates two independent 10A-rated super barrier diodes sharing a common cathode terminal, enabling center-tapped transformer or dual-output DC supply configurations. Its patented super barrier structure replaces traditional PN junctions with low-barrier metal-semiconductor interfaces, reducing VF while maintaining low IR.

Designed for operation up to +175°C junction temperature, it uses matte tin-plated copper leadframe and thermally optimized TO-220AB package (RθJC = 2°C/W). The device exhibits soft recovery characteristics-critical for minimizing EMI in high-frequency switching converters-and maintains stable VF across temperature (0.60–0.85V range from 25°C to 125°C).

Key Specifications

Pinout & Package

TO-220AB package: 3-terminal, dual-diode configuration with common cathode (pin 2), anode 1 (pin 1), and anode 2 (pin 3). Mounting tab is electrically connected to cathode (pin 2) and serves as primary thermal path.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-20CPH05 and MUR2010CT, SBR20A100CT uniquely balances 100V blocking, low VF (0.64V), soft recovery, and TO-220AB compatibility-making it optimal for cost-sensitive, thermally constrained 100V industrial and telecom rectifiers where efficiency and EMI co-design are critical.

Availability

SBR20A100CT is available at Aetrix Electronics and suitable for industrial AC-DC power supplies, server & telecom rectification, and LED driver front-end designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for SBR20A100CT 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 the Americas.

The SBR® Super Barrier Rectifier product line targets high-efficiency, high-reliability power conversion in industrial, computing, and automotive applications-specifically engineered to replace Schottky and fast recovery diodes where low VF, soft switching, and high-temperature operation are mandatory.

FAQ

Is SBR20A100CT suitable for synchronous rectification topologies?

No. SBR20A100CT is a passive rectifier with fixed anode-cathode polarity and no gate control. It cannot function as a synchronous rectifier, which requires actively switched MOSFETs driven by timing signals. Its role is limited to conventional uncontrolled rectification in AC-DC or DC-DC front-ends.

What is the maximum recommended case temperature for continuous operation?

The absolute maximum case temperature is not specified separately, but the device is rated for TJ = −65°C to +175°C. With RθJC = 2°C/W, sustained operation at 20A requires case temperature ≤135°C to maintain TJ ≤175°C. Derating curves (Fig. 3) show 10A per leg at TC = 100°C, confirming safe 20A total at TC ≤85°C with adequate heatsinking.

Does the common cathode connection support parallel operation of both diodes into a single output rail?

Yes. Pin 2 (cathode) is internally bonded to both die cathodes and the metal tab. This allows simultaneous conduction from either anode (pins 1 or 3) to the shared cathode output, enabling dual-input/single-output configurations such as center-tapped transformer rectification or redundant AC inputs.

How does the soft switching behavior impact EMI filter design?

Soft switching reduces reverse recovery dv/dt and eliminates current tailing, suppressing high-frequency ringing above 10MHz. This lowers common-mode noise amplitude by 8–10dB compared to fast recovery diodes, allowing smaller Y-capacitors and fewer turns on common-mode chokes-reducing filter size, cost, and board area in Class B EMI-compliant designs.