Diodes Incorporated SBR30A40CTFP

Overview

SBR30A40CTFP from Diodes Incorporated is a 30A, 40V dual common-cathode Super Barrier Rectifier in ITO-220AB package, engineered for high-efficiency AC/DC and DC/DC power conversion stages where low forward voltage (0.45 V @ 15 A, 125°C) and soft switching reduce conduction losses and EMI. It serves as output rectifier in server PSUs, telecom power supplies, and industrial SMPS.

For engineers reviewing the SBR30A40CTFP datasheet, SBR30A40CTFP pinout, SBR30A40CTFP application, or SBR30A40CTFP equivalent, key selection criteria include thermal resistance (RθJC = 4°C/W), peak surge current rating (250 A), reverse leakage at elevated temperature (100 mA @ 125°C), and RoHS-compliant matte tin finish on copper leadframe.

Technical Context

This dual-diode rectifier integrates two identical SBR elements sharing a common cathode terminal, enabling synchronous half-wave or center-tapped full-wave configurations. Its patented Super Barrier structure delivers lower VF than Schottky diodes while maintaining higher Tj max (150°C) and superior high-temperature leakage stability.

Unlike standard Schottkys, it avoids catastrophic thermal runaway under sustained high-TJ operation due to its controlled carrier lifetime and optimized epitaxial design - verified by IR = 0.5 mA @ 40 V, 25°C and IR = 100 mA @ 40 V, 125°C.

Key Specifications

Pinout & Package

Package: ITO-220AB - Insulated TO-220 variant with electrically isolated tab (2000 V AC isolation), molded plastic case (UL 94V-0), matte tin-plated copper leadframe, weight ≈1.65 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-30CPH04-M3 and MBR3045CT, SBR30A40CTFP offers best-in-class VF stability at high temperature and built-in 2000 V isolation - critical for safety-certified AC/DC designs where creepage/clearance constraints favor ITO-220AB over TO-247 or non-isolated TO-220AB.

Availability

SBR30A40CTFP is available at Aetrix Electronics and suitable for server power supplies, telecom DC/DC converters, and industrial motor drive clamping circuits requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for SBR30A40CTFP 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® (Super Barrier Rectifier) product line was developed to replace conventional Schottky and fast recovery diodes in high-efficiency power conversion, targeting applications demanding low VF, high-temperature reliability, and soft switching - especially in 12 V–48 V infrastructure power.

FAQ

What is the difference between SBR30A40CTFP and SBR30A40CT?

The SBR30A40CTFP uses the ITO-220AB package with electrically isolated tab (2000 V AC isolation), while SBR30A40CT uses standard TO-220AB without isolation. Both share identical electrical specs, but ITO-220AB enables safer mounting directly to grounded heatsinks in Class II systems - critical for medical and telecom power supplies meeting IEC 60950-1 or IEC 62368-1.

Can SBR30A40CTFP replace a standard Schottky rectifier in an existing design?

Yes - it is pin-compatible with TO-220AB/ITO-220AB dual-diode Schottkys (e.g., SB560, MBR30xxCT). However, verify thermal performance: its RθJC is 4°C/W (vs. ~2–3°C/W for many Schottkys), so heatsink sizing may require adjustment. Also confirm layout accommodates ITO-220AB's slightly smaller body dimensions.

What is the maximum recommended case temperature for continuous operation?

The datasheet specifies IO = 30 A at TC = 110°C. For reliable long-term operation, Diodes Incorporated recommends limiting TC to ≤105°C to maintain ≥150°C junction margin (TJ = TC + (IO² × RθJC × θ)). At 30 A, this yields TJ ≈ 105 + (900 × 4 × 0.001) = 108.6°C - well within the -65°C to +150°C operating range.

Does SBR30A40CTFP support lead-free reflow soldering?

Yes - its matte tin finish on copper leadframe complies with J-STD-020D moisture sensitivity level (MSL) 1 and withstands peak reflow temperatures up to 260°C for 10 seconds. The UL 94V-0 molded compound is also compatible with lead-free thermal profiles, confirmed by MIL-STD-202 solderability testing.