Vishay General Semiconductor - Diodes Division BU1006-M3/45

Overview

BU1006-M3/45 from Vishay General Semiconductor is a 600 V, 10 A average current, enhanced isoCink+™ single-in-line bridge rectifier in BU package with glass-passivated junctions and matte tin-plated leads. It delivers 0.88 V forward voltage at 5.0 A and 125 °C, supports 120 A non-repetitive surge current, and operates up to 150 °C junction temperature-designed for AC/DC full-wave rectification in switching power supplies.

For engineers reviewing the BU1006-M3/45 datasheet, BU1006-M3/45 pinout, BU1006-M3/45 application, or BU1006-M3/45 equivalent, key selection criteria include peak reverse voltage (600 V), thermal resistance (3.0 °C/W junction-to-case), UL E312394 recognition, halogen-free RoHS compliance, and compatibility with 60 W air-cooled heatsinks in high-reliability white-goods designs.

Technical Context

The BU1006-M3/45 implements a four-diode full-wave bridge configuration in a thin single-in-line (SIL) package with internal isoCink+™ thermal architecture, enabling superior heat transfer from junction to case. Its glass-passivated chip junction ensures stable reverse leakage (<5 μA at rated VR, 25 °C) and robust surge handling (120 A IFSM, 8.3 ms sine wave).

Designed for fixed-mount, through-hole PCB assembly, it features polarity marking on the body (+ lead at beveled corner), 10 cm-kg maximum mounting torque, and J-STD-002/JESD 22-B102-compliant solderability with 275 °C/10 s max solder dip tolerance.

Key Specifications

Pinout & Package

Package: BU - Thin single-in-line (SIL) molded case with UL 94 V-0 flammability rating, halogen-free and RoHS-compliant (M3 suffix), matte tin-plated leads, polarity marked on body (+ at beveled corner).

Key Features

Applications

Equivalent & Alternatives

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

Compared with GBU6K-E3/45 and GBU10J-M3/45, the BU1006-M3/45 uniquely combines 10 A current rating, 3.0 °C/W thermal resistance, and isoCink+™ architecture in the compact BU outline-making it optimal for space- and thermally constrained 60–100 W AC/DC systems where reliability and regulatory compliance are mandatory.

Availability

BU1006-M3/45 is available at Aetrix Electronics and suitable for switching power supplies, home appliance control boards, and white-goods motor drives requiring stable component supply, halogen-free compliance, and UL-recognized safety certification.

Supply support for BU1006-M3/45 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 General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and optoelectronics with emphasis on reliability, efficiency, and safety certification.

The BU-series enhanced isoCink+™ bridge rectifiers were developed to address thermal limitations and safety compliance gaps in high-density AC/DC front ends for consumer and industrial equipment-delivering improved power density without sacrificing UL recognition or RoHS alignment.

FAQ

What is the maximum junction temperature rating for BU1006-M3/45?

The BU1006-M3/45 has a maximum operating junction temperature (TJ max.) of +150 °C, as specified in the Vishay datasheet Document Number 84801. This rating enables reliable operation in thermally demanding environments such as enclosed power supplies and motor control units. Derating curves confirm usable current capacity down to 3.2 A at 25 °C ambient without heatsink, and full 10 A output when case temperature is maintained at 92 °C using a 60 W air-cooled heatsink. The BU1006-M3/45 must not exceed this limit to ensure long-term parametric stability and safety compliance.

Does BU1006-M3/45 meet UL safety certification requirements?

Yes, the BU1006-M3/45 carries UL recognition under file number E312394, confirming compliance with dielectric strength (1500 V), flammability (UL 94 V-0), and construction standards required for mains-connected equipment. This certification applies specifically to the BU1006-M3/45 variant and is documented in Vishay's official datasheet (84801, Rev. 08-Jul-2022). No additional external insulation is needed when used in floating-ground configurations per Application Note #1, though an insulator is recommended for safety-critical floating applications. The BU1006-M3/45 is approved for general-purpose AC/DC bridge rectification in certified end products.

What is the forward voltage drop of BU1006-M3/45 at rated current and temperature?

The BU1006-M3/45 exhibits a typical forward voltage drop (VF) of 0.88 V per diode at 5.0 A and 125 °C, as measured in the Vishay datasheet's Electrical Characteristics table. At 25 °C, VF is 0.98 V (typical) with a maximum of 1.05 V. This low VF contributes to reduced conduction losses-especially critical in high-efficiency switching power supplies where thermal management is constrained. The value reflects actual device behavior under real operating conditions, not idealized or simulated data, and is validated across production lots per JESD47 reliability testing.

How does the isoCink+™ technology in BU1006-M3/45 improve thermal performance?

The isoCink+™ architecture in BU1006-M3/45 reduces junction-to-case thermal resistance (RθJC) to 3.0 °C/W-significantly lower than standard BU-package bridges (typically ≥4.0 °C/W). This is achieved via optimized internal thermal path design and enhanced thermal interface between die and leadframe. As a result, the BU1006-M3/45 achieves higher power density and longer lifetime in applications like compact AC adapters and sealed appliance control boards. In practice, this allows 10 A continuous operation with a 60 W heatsink, whereas conventional bridges would require larger heatsinks or forced cooling to sustain equivalent current.

Is BU1006-M3/45 compatible with lead-free soldering processes?

Yes, the BU1006-M3/45 is fully compatible with lead-free soldering: its matte tin-plated leads meet J-STD-002 and JESD 22-B102 solderability standards, and it withstands solder dip at 275 °C for up to 10 seconds per JESD 22-B106. The M3 suffix confirms halogen-free, RoHS-compliant construction, aligning with IPC-J-STD-020 moisture sensitivity level (MSL) requirements for surface-mount and through-hole reflow/wave processes. No special pre-bake or handling is required beyond standard MSL-1 guidelines, and the BU1006-M3/45 maintains mechanical and electrical integrity after multiple thermal cycles typical in high-volume manufacturing.