Diodes Incorporated SBR20A40CTFP-JT

Overview

SBR20A40CTFP-JT from Diodes Incorporated is a 20A dual common-cathode Super Barrier Rectifier rated for 40V peak reverse voltage, featuring low forward voltage (0.47V typ. at 10A, 25°C), soft fast switching, and operation up to +150°C junction temperature. It is used in high-efficiency AC/DC front-ends, DC-DC converter secondary-side rectification, and industrial power supplies where thermal stability and low conduction loss are critical.

For engineers reviewing the SBR20A40CTFP-JT datasheet, SBR20A40CTFP-JT pinout, SBR20A40CTFP-JT application, or SBR20A40CTFP-JT equivalent, key selection criteria include its ITO-220AB package isolation rating (2000 VAC), thermal resistance (4°C/W), leakage current (≤100 mA at 40V, 125°C), and compatibility with high-temp PCB layouts requiring lead-free, halogen-free compliance.

Technical Context

This device integrates two independent super barrier rectifier elements in a single ITO-220AB package with electrically isolated tab, enabling dual-channel synchronous or interleaved rectification without external insulation. Its patented super barrier structure replaces traditional PN junctions with low-barrier metal-semiconductor interfaces, delivering lower VF than Schottky diodes while maintaining higher reverse blocking capability and superior high-temperature leakage performance.

The 2000 VAC isolation between terminals and heatsink supports direct mounting to grounded chassis in Class I AC/DC systems. Thermal derating follows a linear curve from 20A at TC = 110°C down to ~12A at TC = 150°C, validated per Figure 1 in DS30963 Rev. 6–2.

Key Specifications

Pinout & Package

Package: ITO-220AB - Insulated TO-220 variant with electrically isolated metal tab (heatsink interface), UL 94V-0 molded plastic body, matte tin-plated copper leadframe, and 1.65 g mass. Pin configuration confirmed from Diodes DS30963 Rev. 6–2 mechanical drawings and pin-out diagrams.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-20CPH04-M3 and MUR2040CT, SBR20A40CTFP-JT uniquely combines 40V rating, 0.47V VF, 2000 VAC isolation, and ITO-220AB footprint-making it optimal for compact, isolated, high-efficiency 12–24V industrial and medical power stages where thermal and safety constraints dominate.

Availability

SBR20A40CTFP-JT is available at Aetrix Electronics and suitable for server power supplies, industrial DC-DC converters, and medical AC/DC adapters requiring stable component supply, long-lifecycle support, and RoHS-compliant green packaging.

Supply support for SBR20A40CTFP-JT 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 US.

SBR20A40CTFP-JT belongs to the SBR® Super Barrier Rectifier product line, engineered specifically for high-efficiency, high-temperature secondary-side rectification in AC/DC and isolated DC/DC power supplies where Schottky limitations in voltage and leakage must be overcome.

FAQ

What is the maximum continuous junction temperature for SBR20A40CTFP-JT?

The absolute maximum junction temperature is +150°C, with continuous operation supported up to this limit when case temperature is maintained at or below 110°C per the derating curve in DS30963. At TC = 110°C, the device delivers full 20A average current per element; operation beyond 150°C risks irreversible degradation of the super barrier junction.

Can SBR20A40CTFP-JT be used as a direct replacement for standard Schottky rectifiers?

Yes, but only in 40V-class applications where its 0.47V VF advantage and soft switching provide measurable system-level benefits. It is not a drop-in replacement for 60V+ Schottkys due to its 40V VRRM limit, and its ITO-220AB isolation requires verification of mounting clearance in existing TO-220AB footprints.

Does the ITO-220AB package require thermal compound when mounted to a heatsink?

Yes - although the tab is electrically isolated, thermal interface material (TIM) is required to minimize junction-to-heatsink thermal resistance. The specified RθJC = 4°C/W assumes proper mounting pressure (15–20 psi) and 0.1 mm TIM bond line thickness; omitting TIM raises effective RθJC by ≥2.5°C/W, risking thermal overload at full load.

How does the SBR technology differ from conventional Schottky and PN rectifiers?

SBR uses a proprietary metal-semiconductor barrier engineered for lower forward voltage than PN diodes and higher reverse voltage/leakage stability than Schottkys. Unlike Schottky, it avoids catastrophic thermal runaway at high temperatures; unlike PN, it eliminates reverse recovery charge, enabling faster switching with lower EMI than ultrafast rectifiers like MUR2040CT.