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Vishay General Semiconductor - Diodes Division BU1008A-M3/51
- Part No.:
- BU1008A-M3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Bridge Rectifiers
- Package:
- 4-SIP, BU
- Datasheet:
-
BU1008A-M3/51.pdf
- Description:
- BRIDGE RECT 1PHASE 800V 10A BU
- Quantity:
- Payment:
- Shipping:
Inventory:5,246
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Product details
Overview
BU1008A-M3/51 from Vishay General Semiconductor is a halogen-free, RoHS-compliant single-in-line bridge rectifier with 800 V maximum repetitive peak reverse voltage, 10 A average forward current (at TC = 90 °C), and 90 A non-repetitive surge capability. It features glass-passivated junctions, UL E312394 recognition, and is designed for AC/DC full-wave rectification in switching power supplies and white-goods motor drives.
For engineers reviewing the BU1008A-M3/51 datasheet, BU1008A-M3/51 pinout, BU1008A-M3/51 application, or BU1008A-M3/51 equivalent, key selection criteria include its 800 V VRRM rating, thermal resistance of 3.0 °C/W (junction-to-case), 0.94 V forward voltage at 5.0 A and 125 °C, 5 μA max reverse leakage at 25 °C, and BU package mechanical compatibility with heatsink mounting torque up to 10 cm-kg.
Technical Context
The BU1008A-M3/51 integrates four silicon diodes in a single-phase full-wave bridge configuration within a thin, molded BU case. Its isoCink+™ construction enables superior thermal conductivity and supports continuous operation up to 150 °C junction temperature.
Designed for high-reliability AC input stages, it delivers 33 A²s I²t rating for fusing protection and meets JESD 22-B106 soldering requirements (275 °C, 10 s). Polarity is marked on the body, with beveled corner indicating the positive output terminal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 800 V - Withstands peak reverse voltage in AC line applications without breakdown |
| IF(AV) @ TC = 90 °C | 10 A - Sustains continuous DC output current with 60 W air-cooled heatsink |
| IFSM (8.3 ms) | 90 A - Handles inrush surges during power-up in SMPS and motor controllers |
| VF @ IF = 5.0 A, TJ = 125 °C | 0.94 V - Low conduction loss improves efficiency in thermally constrained designs |
| IR @ VR = rated, TA = 25 °C | 5 μA - Minimal leakage preserves standby power integrity in low-power modes |
| RθJC | 3.0 °C/W - Enables predictable thermal design when mounted to heatsink |
| TJ max. | 150 °C - Supports operation in high-ambient environments such as enclosed appliances |
Pinout & Package
Package: BU - Thin single-in-line molded case with matte tin-plated leads, UL 94 V-0 compliant compound, and polarity marked via beveled corner on positive lead.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ~ (AC1) | AC input terminal 1 | One side of AC transformer secondary; connects to internal diode anodes and cathodes |
| ~ (AC2) | AC input terminal 2 | Other side of AC transformer secondary; completes full-wave bridge input path |
| + | DC positive output | Common cathode node of two series diodes; beveled corner identifies this pin |
| - | DC negative output | Common anode node of two series diodes; referenced to system ground or return |
Key Features
| Feature | Design Value |
|---|---|
| UL E312394 recognition | Validates safety compliance for dielectric strength (1500 V) and flammability (UL 94 V-0) |
| isoCink+™ thermal architecture | Reduces RθJC to 3.0 °C/W, enabling higher power density vs. standard bridge packages |
| Halogen-free & RoHS-compliant (M3 suffix) | Meets environmental regulations without compromising solderability or whisker resistance (JESD 201 Class 1A) |
| Glass passivated chip junction | Enhances long-term reliability under humidity and thermal cycling stress in consumer and industrial environments |
Applications
| Switching Power Supplies | Home Appliance Motor Drives |
|---|---|
Use Scenario: AC front-end rectification in 50–100 W offline SMPS for TVs, monitors, and LED drivers. IC Role / Device Role / Timing Role: Full-wave bridge rectifier converting 85–265 VAC input to pulsating DC prior to bulk capacitor filtering. Use Value: 800 V VRRM ensures margin against line transients; 10 A IF(AV) supports sustained load delivery with minimal derating. | Use Scenario: Input rectification for universal motor control in washing machines and vacuum cleaners. IC Role / Device Role / Timing Role: Bridge rectifier supplying unregulated DC to triac-based phase-control or PWM motor driver ICs. Use Value: 90 A IFSM withstands high inrush during motor startup; thermal robustness supports intermittent duty cycles. |
| White-Goods Control Boards | Industrial AC-DC Auxiliary Supplies |
Use Scenario: Main power conversion in embedded control modules for refrigerators and dishwashers. IC Role / Device Role / Timing Role: Primary rectifier feeding isolated flyback or buck converter for MCU, sensor, and display power rails. Use Value: UL recognition and 150 °C TJ max enable compliance with IEC 60335 safety standards and sealed enclosure operation. | Use Scenario: Compact auxiliary supply in PLC I/O modules and HVAC controllers requiring stable 12–24 VDC. IC Role / Device Role / Timing Role: Off-line rectifier stage delivering low-noise DC to linear regulators or DC-DC converters. Use Value: 5 μA IR at 25 °C minimizes no-load power loss; BU package allows direct PCB mounting with heatsink interface. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bridge rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| GBU8K-E3/45 | Same 800 V VRRM and 8 A IF(AV), but GBU package (larger footprint, higher RθJA = 35 °C/W) | Suitable where board space permits larger package and lower thermal performance is acceptable | Select when legacy GBU layout exists or heatsinking is less critical |
| GBU8J-M3/51 | Same 800 V VRRM and 8 A IF(AV); halogen-free M3 suffix, but GBU package and 35 °C/W RθJA | Matches BU1008A-M3/51's environmental specs but lacks BU package's thermal advantage | Choose only if BU1008A-M3/51's 3.0 °C/W RθJC is not required and GBU footprint is preferred |
Compared with GBU8K-E3/45 and GBU8J-M3/51, BU1008A-M3/51 offers 2.5× lower junction-to-case thermal resistance (3.0 vs. 7.5 °C/W typical for GBU), enabling higher power density in space-constrained white-goods and SMPS designs without redesigning heatsink interfaces.
Availability
BU1008A-M3/51 is available at Aetrix Electronics and suitable for switching power supplies, home appliance motor drives, and industrial AC-DC auxiliary supplies requiring stable component supply, halogen-free compliance, and UL-recognized safety certification.
Supply support for BU1008A-M3/51 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 and application-specific performance.
The BU-series bridge rectifiers are engineered for high-efficiency, high-reliability AC/DC conversion in cost-sensitive, thermally demanding consumer and industrial systems - prioritizing thermal performance, safety certification, and environmental compliance.
FAQ
What is the maximum junction temperature rating for BU1008A-M3/51?
The BU1008A-M3/51 has a specified operating junction temperature range of -55 °C to +150 °C. This 150 °C maximum enables reliable operation in enclosed, high-ambient environments such as washing machine control boards or sealed power adapters. The device's thermal resistance (RθJC = 3.0 °C/W) allows accurate junction temperature prediction when mounted to a heatsink, ensuring safe operation within this limit under defined load and cooling conditions. BU1008A-M3/51 must not exceed 150 °C TJ in continuous service.
Does BU1008A-M3/51 meet UL safety certification?
Yes, BU1008A-M3/51 carries UL recognition file number E312394, confirming compliance with UL 60747-1 for discrete semiconductors. It is rated for 1500 V dielectric strength and uses UL 94 V-0 compliant molding compound. The M3 suffix indicates halogen-free, RoHS-compliant construction that also passes JESD 201 Class 1A whisker testing. BU1008A-M3/51 is approved for use in end products requiring recognized safety components per IEC/UL 62368-1 and IEC/UL 60335.
What is the forward voltage drop of BU1008A-M3/51 at 5.0 A and 125 °C?
The BU1008A-M3/51 exhibits a typical forward voltage of 0.94 V per diode at IF = 5.0 A and TJ = 125 °C, with a maximum of 1.00 V under those conditions. Since the device contains two diodes conducting in series during each half-cycle, total conduction loss is approximately 1.88 V at full load and elevated temperature. This value is confirmed in the Electrical Characteristics table of Vishay document 84800 and directly impacts conduction efficiency and thermal design. BU1008A-M3/51's VF remains stable across temperature due to its glass-passivated junction.
Can BU1008A-M3/51 replace BU1006A-M3/51 in an existing design?
BU1008A-M3/51 is not a direct replacement for BU1006A-M3/51 due to its higher 800 V VRRM versus 600 V - while electrically compatible in most 600 V-rated circuits, the increased voltage rating does not degrade performance. However, both share identical BU package, pinout, thermal characteristics (RθJC = 3.0 °C/W), and mounting specifications. BU1008A-M3/51 may be used as a robustness upgrade where transient overvoltage margin is desired, provided layout and heatsinking remain unchanged. Always verify system-level stress margins before substitution.
What is the recommended mounting torque for BU1008A-M3/51?
The recommended mounting torque for BU1008A-M3/51 is 5.7 cm-kg (5 inch-lbs), with an absolute maximum of 10 cm-kg (8.8 inch-lbs). This applies when securing the device to a heatsink using the designated mounting hole in the BU package base. Exceeding the maximum torque risks cracking the molded case or damaging internal wire bonds. The BU1008A-M3/51 datasheet specifies these values in the Mechanical Data section, and adherence ensures mechanical integrity and optimal thermal contact. Proper torque is essential for maintaining the 3.0 °C/W RθJC performance of BU1008A-M3/51.
BU1008A-M3/51 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- -
- Package/Case:
- 4-SIP, BU
- Packaging:
- Tray
- Product Status:
- Active
- Diode Type:
- Single Phase
- Technology:
- Standard
- Voltage - Peak Reverse (Max):
- 800 V
- Current - Average Rectified (Io):
- 10 A
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 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
BU1008A-M3/51 FAQ
1.How can I place an order for BU1008A-M3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for BU1008A-M3/51 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 BU1008A-M3/51 reliable?
The price and inventory of BU1008A-M3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BU1008A-M3/51 is usually 5 days.
3.What payment methods are accepted for BU1008A-M3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BU1008A-M3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BU1008A-M3/51?
BU1008A-M3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BU1008A-M3/51 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 BU1008A-M3/51?
For technical support, including BU1008A-M3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BU1008A-M3/51 requirements.
6.How does Aetrix verify that BU1008A-M3/51 is sourced from the original manufacturer or authorized distributors?
All BU1008A-M3/51 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 BU1008A-M3/51 meets industry standards.
7.What is the process for return or replacement of BU1008A-M3/51?
All BU1008A-M3/51 units undergo pre-shipment inspection (PSI). If there is an issue with BU1008A-M3/51, 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 BU1008A-M3/51 part is unused and in its original packaging.
Return procedure for BU1008A-M3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BU1008A-M3/51 Tags
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