Diodes Incorporated SBR1A20T5-7

Overview

SBR1A20T5 from Diodes Incorporated is a 1A Super Barrier Rectifier (SBR®) in SOD523 package, rated for 20V peak repetitive reverse voltage, with max forward voltage of 0.52V at 1A and max reverse leakage of 0.2mA at 20V/125°C. It serves as a high-efficiency freewheel or blocking diode in space-constrained DC/DC converters and AC/DC adapters.

For engineers reviewing the SBR1A20T5 datasheet, SBR1A20T5 pinout, SBR1A20T5 application, or SBR1A20T5 equivalent, key selection criteria include ultra-low VF at high current, stable IR up to +125°C, junction-to-ambient thermal resistance (165°C/W with copper pad), reverse recovery time (15ns), and SOD523 footprint compatibility in thin-profile power stages.

Technical Context

The SBR1A20T5 employs patented Super Barrier Rectifier technology-distinct from Schottky and standard PN diodes-to deliver superior avalanche ruggedness while maintaining low VF. Its structure enables stable reverse leakage under thermal stress, avoiding thermal runaway in high-temperature operation.

It exhibits 15ns reverse recovery time at IF = 10mA and IRRM = 0.1IR, supporting efficient high-frequency switching. Junction capacitance is 19pF at VR = 20V/1MHz, enabling minimal capacitive loading in fast-switching topologies.

Key Specifications

Pinout & Package

Package: SOD523 - ultra-thin, surface-mount plastic package (0.85 × 1.25 mm, height ≤ 0.55 mm), optimized for PCB area and profile constraints in portable electronics.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SBRT1A20T5-7, the SBR1A20T5 trades automotive qualification for lower cost and faster lead time; versus VB1100-GS08, it delivers 7× lower high-temp leakage and proven avalanche survival-critical for unregulated industrial environments.

Availability

SBR1A20T5 is available at Aetrix Electronics and suitable for DC/DC converters, AC/DC adapters, and battery protection circuits requiring stable component supply, JEDEC-compliant reliability, and RoHS/Green compliance.

Supply support for SBR1A20T5 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® product line targets high-efficiency, high-reliability power conversion-specifically addressing the trade-off between low VF and robust avalanche performance in compact, thermally demanding applications.

FAQ

What is the maximum junction temperature and how does it affect derating?

The SBR1A20T5 has an operating junction temperature range of –55°C to +150°C. At 150°C, its average rectified current derates to ~0.45A (per Figure 4). Derating is linear above 25°C ambient when mounted on a 1-inch² copper pad (RθJA = 165°C/W); exceeding TJ(max) risks irreversible parametric shift and reduced lifetime.

Is the SBR1A20T5 suitable for synchronous rectification replacement?

No-it is a unidirectional rectifier, not a synchronous MOSFET driver or controller. However, it serves as a drop-in replacement for Schottky diodes in non-synchronous flyback or boost converters where gate drive complexity must be avoided, especially where VF and thermal stability outweigh switching speed requirements.

Does the SOD523 package support reflow soldering per J-STD-020?

Yes-the SBR1A20T5 is qualified for moisture sensitivity level 1 (MSL-1) per J-STD-020, meaning it can be stored indefinitely at ≤30°C/60% RH and withstand standard Pb-free reflow profiles (peak 260°C) without baking. Terminal finish is matte tin annealed over Alloy 42, ensuring reliable solder wetting.

How does SBR® technology differ from standard Schottky diodes in failure mode?

SBR® devices use a modified epitaxial structure that sustains controlled avalanche breakdown under overvoltage transients-unlike Schottky diodes, which fail short-circuit under similar stress. This enables survivability in ISO 7637-2 load-dump events without external clamping, preserving system uptime in automotive and industrial power rails.