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Home > Products > Discrete Semiconductor Products > Diodes > Bridge Rectifiers

Vishay General Semiconductor - Diodes Division BU1008-E3/51

Name: BU1008-E3/51
Brand: Vishay General Semiconductor - Diodes Division
SKU: BU1008-E3/51
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BU1008-E3/51

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: Bridge Rectifiers

Package:: 4-SIP, BU

Datasheet:: BU1008-E3/51.pdf

Description:: BRIDGE RECT 1PHASE 800V 3.2A BU

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Inventory:1,250

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Product details

Overview

BU1008-E3/51 from Vishay General Semiconductor is an enhanced isoCink+™ single-in-line bridge rectifier rated for 800 V repetitive peak reverse voltage, 10 A average forward current at 92 °C case temperature, and 120 A non-repetitive surge current. It features glass-passivated junctions, UL recognition (E312394), and is designed for AC/DC full-wave rectification in switching power supplies and white-goods motor drives.

For engineers reviewing the BU1008-E3/51 datasheet, BU1008-E3/51 pinout, BU1008-E3/51 application, or BU1008-E3/51 equivalent, key selection criteria include V_RRM = 800 V, I_F(AV) = 10 A with heatsink, thermal resistance R_θJC = 3.0 °C/W, and RoHS-compliant matte tin-plated leads meeting J-STD-002 solderability.

Technical Context

The BU1008-E3/51 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 silicon die ensures stable reverse leakage (<5 μA at 25 °C) and low forward voltage drop (0.88 V at 5.0 A, 125 °C).

Designed for high-reliability AC line input stages, it supports 8.3 ms sine-wave surge events (I_FSM = 120 A) and fusing I²t rating of 60 A²s. Polarity is marked on the body (+ lead has beveled corner), and mounting torque is limited to 10 cm·kg to prevent package damage.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	800 V - Withstands peak AC line transients up to 800 V without breakdown in full-wave rectifier topologies.
I_F(AV)	10 A at T_C = 92 °C - Sustains continuous DC output current of 10 A when mounted on a 60 W air-cooled heatsink.
I_FSM	120 A (8.3 ms sine) - Handles inrush surges from capacitive input filters in SMPS without failure.
V_F @ 5.0 A, 125 °C	0.88 V - Low conduction loss improves system efficiency and reduces thermal load in compact enclosures.
R_θJC	3.0 °C/W - Enables predictable junction temperature rise under load when heatsink interface is controlled.
I_R @ V_R, 25 °C	≤5 μA - Ensures minimal standby power loss and stable voltage hold-up in off-state conditions.
Package	BU - Thin single-in-line molded case with UL 94 V-0 rating, polarity marking, and 0.080" lead pitch.

Pinout & Package

Package: BU case - thin single-in-line (SIL) thermally optimized plastic housing with beveled corner indicating positive output terminal; dimensions 0.710 × 0.190 × 0.080 inches (18.0 × 4.83 × 2.03 mm); UL 94 V-0 compliant molding compound; matte tin-plated leads.

Pin/Terminal	Circuit Role	Design Meaning
~ (AC1)	AC input terminal 1	One side of AC input winding; connected internally to cathode of D1 and anode of D2.
~ (AC2)	AC input terminal 2	Other side of AC input winding; connected internally to cathode of D3 and anode of D4.
+	Positive DC output	Anodes of D1 and D3; beveled corner on package identifies this pin; connects to bulk capacitor positive rail.
-	Negative DC output	Cathodes of D2 and D4; connects to bulk capacitor negative rail and system ground reference.

Key Features

Feature	Design Value
isoCink+™ thermal architecture	Reduces R_θJC to 3.0 °C/W, enabling higher power density than standard SIL bridges without derating.
Glass-passivated junction	Ensures long-term stability of V_F and I_R across temperature and humidity stress, critical for appliance field life.
UL recognition E312394	Validates dielectric strength ≥1500 V and construction safety for use in Class I/II AC mains-connected equipment.
Solderable matte tin leads	Meets J-STD-002 and JESD 22-B102; supports wave and reflow soldering up to 275 °C for 10 s without degradation.

Applications

Switching Power Supply Input Stage	Refrigerator Compressor Drive
Use Scenario: AC line input rectification feeding PFC or PWM controller in 100–300 W offline SMPS. IC Role / Device Role / Timing Role: Full-wave bridge rectifier converting 85–265 V_AC to pulsating DC prior to bulk capacitance and regulation. Use Value: 800 V V_RRM provides 2× margin over 265 V_AC peak (375 V), ensuring robustness against line surges per IEC 61000-4-5.	Use Scenario: Rectifying AC supply for BLDC motor driver in inverter-based refrigerator compressors. IC Role / Device Role / Timing Role: Primary DC bus generation stage operating continuously at elevated ambient temperatures (>60 °C). Use Value: 10 A I_F(AV) at 92 °C case enables sustained operation without forced cooling, reducing system BOM cost and noise.
Washing Machine Motor Control	LED Lighting Driver Input
Use Scenario: AC-to-DC conversion for universal motor or inverter-driven drum motor in front-load washers. IC Role / Device Role / Timing Role: High-surge-capable bridge handling repeated start-stop cycles and brush-commutation noise. Use Value: 120 A I_FSM withstands locked-rotor inrush without degradation, extending service life beyond 10,000 cycles.	Use Scenario: Input rectification in isolated LED drivers for commercial downlights and street lighting. IC Role / Device Role / Timing Role: Compact, thermally efficient bridge supporting high-density PCB layouts with minimal heatsinking. Use Value: R_θJC = 3.0 °C/W allows direct mounting to metal-core PCBs, eliminating discrete heatsinks while maintaining T_J < 135 °C.

Switching Power Supply Input Stage

Refrigerator Compressor Drive

Use Scenario: AC line input rectification feeding PFC or PWM controller in 100–300 W offline SMPS.

IC Role / Device Role / Timing Role: Full-wave bridge rectifier converting 85–265 V_AC to pulsating DC prior to bulk capacitance and regulation.

Use Value: 800 V V_RRM provides 2× margin over 265 V_AC peak (375 V), ensuring robustness against line surges per IEC 61000-4-5.

Use Scenario: Rectifying AC supply for BLDC motor driver in inverter-based refrigerator compressors.

IC Role / Device Role / Timing Role: Primary DC bus generation stage operating continuously at elevated ambient temperatures (>60 °C).

Use Value: 10 A I_F(AV) at 92 °C case enables sustained operation without forced cooling, reducing system BOM cost and noise.

Washing Machine Motor Control

LED Lighting Driver Input

Use Scenario: AC-to-DC conversion for universal motor or inverter-driven drum motor in front-load washers.

IC Role / Device Role / Timing Role: High-surge-capable bridge handling repeated start-stop cycles and brush-commutation noise.

Use Value: 120 A I_FSM withstands locked-rotor inrush without degradation, extending service life beyond 10,000 cycles.

Use Scenario: Input rectification in isolated LED drivers for commercial downlights and street lighting.

IC Role / Device Role / Timing Role: Compact, thermally efficient bridge supporting high-density PCB layouts with minimal heatsinking.

Use Value: R_θJC = 3.0 °C/W allows direct mounting to metal-core PCBs, eliminating discrete heatsinks while maintaining T_J < 135 °C.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
GBU8K-E3/51	V_RRM = 800 V, I_F(AV) = 8 A, R_θJC = 4.0 °C/W, GBU package (larger footprint)	Lower current rating requires derating above 6 A ambient; less suitable for heatsink-limited designs	Select when legacy GBU layout exists and thermal margin >20 °C is available.
GBU10K-E3/51	V_RRM = 800 V, I_F(AV) = 10 A, but R_θJC = 4.5 °C/W and no isoCink+™ thermal enhancement	Higher thermal resistance increases junction temperature by ~4.5 °C/W vs. BU1008-E3/51 at same power	Choose only if BU package footprint is incompatible and board-level thermal management compensates.

Compared with GBU8K-E3/51 and GBU10K-E3/51, BU1008-E3/51 delivers identical 800 V/10 A ratings with 30 % lower thermal resistance and a 30 % smaller footprint-enabling higher power density and simplified thermal design in space-constrained white-goods and industrial power supplies.

Availability

BU1008-E3/51 is available at Aetrix Electronics and suitable for switching power supplies, refrigerator compressor drives, and washing machine motor control requiring stable component supply, RoHS compliance, and UL-recognized safety certification.

Supply support for BU1008-E3/51 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, thermal performance, and safety certification.

The BU series bridge rectifiers are engineered for high-efficiency AC/DC conversion in consumer and industrial appliances, emphasizing thermal robustness, surge immunity, and UL-recognized isolation for mains-connected systems.

FAQ

What is the maximum junction temperature rating for BU1008-E3/51?

The BU1008-E3/51 has a specified operating junction temperature range of -55 °C to +150 °C. This maximum rating is validated under conditions including 10 A average forward current with case temperature maintained at 92 °C using a 60 W air-cooled heatsink. Exceeding 150 °C risks irreversible parametric shift or bond-wire failure.

Does BU1008-E3/51 meet UL safety standards?

Yes, BU1008-E3/51 carries UL recognition file number E312394, confirming compliance with UL 60950-1 and UL 62368-1 for dielectric strength (≥1500 V), flammability (UL 94 V-0), and construction safety. This approval applies specifically to the BU1008-E3/51 variant with E3 suffix and BU package.

What is the forward voltage drop of BU1008-E3/51 at 5.0 A and 125 °C?

The BU1008-E3/51 exhibits a typical forward voltage drop of 0.88 V per diode at 5.0 A and 125 °C junction temperature, as confirmed in the Electrical Characteristics table of Vishay document 84801. This value reflects actual conduction loss under elevated thermal stress, critical for efficiency modeling in hot environments.

Can BU1008-E3/51 be used without a heatsink?

BU1008-E3/51 can operate without a heatsink only at significantly reduced current: 3.2 A average forward current at 25 °C ambient (free air). At higher loads or ambient temperatures, thermal runaway risk increases rapidly; the datasheet explicitly requires heatsinking for 10 A operation, with derating curves provided for intermediate conditions.

What does the "E3/51" suffix indicate in BU1008-E3/51?

The "E3" suffix denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads meeting J-STD-002 solderability. The "/51" indicates packaging in paper trays containing 250 units, per Vishay's ordering nomenclature in document 84801. This differs from /45 (tube, 20 units) and M3 (halogen-free variant).

BU1008-E3/51 Specifications

Product attributes: Attribute value

Manufacturer:: Vishay General Semiconductor - Diodes Division

Series:: -

Package/Case:: 4-SIP, BU

Packaging:: Bulk

Product Status:: Active

Diode Type:: Single Phase

Technology:: Standard

Voltage - Peak Reverse (Max):: 800 V

Current - Average Rectified (Io):: 3.2 A

Voltage - Forward (Vf) (Max) @ If:: 1.05 V @ 5 A

Current - Reverse Leakage @ Vr:: 5 µA @ 800 V

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: isoCINK+™ BU

BU1008-E3/51 FAQ

1.How can I place an order for BU1008-E3/51 through Aetrix?

Please submit a Request for Quotation (RFQ) for BU1008-E3/51 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for BU1008-E3/51 reliable?

The price and inventory of BU1008-E3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BU1008-E3/51 is usually 5 days.

3.What payment methods are accepted for BU1008-E3/51?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BU1008-E3/51 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BU1008-E3/51?

BU1008-E3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BU1008-E3/51 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for BU1008-E3/51?

For technical support, including BU1008-E3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BU1008-E3/51 requirements.

6.How does Aetrix verify that BU1008-E3/51 is sourced from the original manufacturer or authorized distributors?

All BU1008-E3/51 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that BU1008-E3/51 meets industry standards.

7.What is the process for return or replacement of BU1008-E3/51?

All BU1008-E3/51 units undergo pre-shipment inspection (PSI). If there is an issue with BU1008-E3/51, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The BU1008-E3/51 part is unused and in its original packaging.

Return procedure for BU1008-E3/51:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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