Vishay General Semiconductor - Diodes Division BYVB32-50-E3/81

Overview

BYVB32-50-E3/81 from Vishay General Semiconductor is a dual common-cathode ultrafast rectifier in D2PAK (TO-263AB) package, rated for 50 V repetitive peak reverse voltage, 18 A average forward current, and 25 ns reverse recovery time. It delivers low forward voltage drop (0.85 V at 5 A, 100 °C), high surge capability (150 A), and operates up to 150 °C junction temperature - optimized for high-frequency switching power supplies and DC/DC converters.

For engineers reviewing the BYVB32-50-E3/81 datasheet, BYVB32-50-E3/81 pinout, BYVB32-50-E3/81 application, or BYVB32-50-E3/81 equivalent, key selection criteria include ultrafast recovery performance, thermal resistance (1.6 °C/W), RoHS-compliant matte tin plating, MSL Level 1 rating, and compatibility with automated SMT assembly using tape-and-reel delivery.

Technical Context

This device integrates two ultrafast silicon diodes in a single D2PAK package with shared cathode connection, enabling compact half-bridge or dual-output freewheeling configurations. Its glass-passivated junction ensures stable switching behavior under high dI/dt conditions (100 A/μs test condition), while the low trr minimizes switching losses in SMPS operating above 100 kHz.

The BYVB32-50-E3/81 is electrically characterized per diode - not as a monolithic dual die with shared thermal path - and exhibits symmetrical VF and IR across both elements. Thermal design must account for 1.6 °C/W junction-to-case resistance per diode, with heatsink mounting via the exposed cathode tab (Pin 2).

Key Specifications

Pinout & Package

Package: D2PAK (TO-263AB), surface-mount, with exposed cathode tab (Pin 2) serving as thermal and electrical connection point. Matte tin-plated leads meet J-STD-002 solderability and JESD 201 Class 1A whisker requirements.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultrafast dual-diode rectifier applications.

Compared with STTH16R06DJF and MBR2050CT, the BYVB32-50-E3/81 offers superior thermal resistance (1.6 °C/W vs. ≥2.5 °C/W), SMT compatibility, and tighter trr consistency - making it optimal for space-constrained, high-density 50 V output power stages requiring repeatable ultrafast switching.

Availability

BYVB32-50-E3/81 is available at Aetrix Electronics and suitable for switching mode power supplies, DC/DC converters, and industrial motor drive auxiliary power circuits requiring stable component supply, RoHS compliance, and tape-and-reel SMT readiness.

Supply support for BYVB32-50-E3/81 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

Vishay Intertechnology is a global manufacturer of discrete semiconductors and passive components, founded in 1962 and headquartered in Malvern, PA. It serves automotive, industrial, computing, and consumer markets with vertically integrated fabrication and packaging.

The BYVB32 series belongs to Vishay's ultrafast rectifier product line, engineered specifically for high-frequency power conversion where low trr, low VF, and robust surge capability are essential - targeting next-generation compact AC/DC adapters, server VRMs, and renewable energy inverters.

FAQ

What is the maximum junction temperature rating for BYVB32-50-E3/81?

The BYVB32-50-E3/81 has a maximum junction temperature (TJ max.) of 150 °C, as specified in Vishay's datasheet Document Number 88558. This rating allows reliable operation in high-ambient environments such as enclosed power supplies or motor drive cabinets. Derating curves confirm usable IF(AV) down to 12 A at TC = 100 °C, ensuring design margin when heatsinking is constrained. The BYVB32-50-E3/81 must be mounted with adequate copper area to maintain this limit under full load.

Is BYVB32-50-E3/81 RoHS-compliant and halogen-free?

Yes, the BYVB32-50-E3/81 carries the "E3" suffix, indicating RoHS-compliant construction per EU Directive 2011/65/EU and halogen-free status per IEC 61249-2-21. Vishay confirms compliance in its material declaration document 99912. The device uses matte tin-plated leads and UL 94 V-0 molding compound. The BYVB32-50-E3/81 is not AEC-Q101 qualified - that requires the HM3 suffix variant.

What is the reverse recovery time (trr) test condition for BYVB32-50-E3/81?

The reverse recovery time (trr) of 25 ns for BYVB32-50-E3/81 is measured under standardized conditions: IF = 1 A forward current, VR = 30 V reverse voltage, dI/dt = 100 A/μs, and Irr = 10 % of peak reverse current (IRM). These parameters reflect real-world hard-switching behavior in SMPS. The BYVB32-50-E3/81 maintains consistent trr across temperature, with minimal drift up to 125 °C junction temperature.

Can BYVB32-50-E3/81 replace BYV32-50-E3/45 in a design?

No - BYVB32-50-E3/81 and BYV32-50-E3/45 differ in package, thermal performance, and mounting. The BYVB32-50-E3/81 uses D2PAK (TO-263AB) for SMT, while BYV32-50-E3/45 uses TO-220AB for through-hole. Though both share 50 V VRRM and 18 A IF(AV), their RθJC (1.6 °C/W vs. 1.6 °C/W) is identical, but PCB layout, reflow profile, and mechanical mounting are incompatible. The BYVB32-50-E3/81 is not a drop-in replacement for BYV32-50-E3/45.

Does BYVB32-50-E3/81 have a common-cathode configuration?

Yes, the BYVB32-50-E3/81 features a dual common-cathode configuration: Pins 1 and 3 are independent anodes, and Pin 2 is the shared cathode terminal. This architecture supports dual-output rectification, interleaved freewheeling, or redundant paths in safety-critical power rails. The BYVB32-50-E3/81 datasheet explicitly defines this topology in the "Circuit configuration" section and mechanical drawings.