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Vishay General Semiconductor - Diodes Division GBU8A-M3/51
- Part No.:
- GBU8A-M3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Bridge Rectifiers
- Package:
- 4-SIP, GBU
- Datasheet:
-
GBU8A-M3/51.pdf
- Description:
- BRIDGE RECT 1PHASE 50V 3.9A GBU
- Quantity:
- Payment:
- Shipping:
Inventory:7,959
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Product details
Overview
GBU8A-M3/51 from Vishay General Semiconductor is a glass passivated single-phase bridge rectifier in GBU package, rated for 50 V repetitive peak reverse voltage, 8.0 A average forward current at TC = 60 °C, and 200 A non-repetitive surge current. It delivers low 1.0 V forward voltage drop at 8.0 A and supports AC/DC full-wave rectification in compact power supplies.
For engineers reviewing the GBU8A-M3/51 datasheet, GBU8A-M3/51 pinout, GBU8A-M3/51 application, or GBU8A-M3/51 equivalent, key selection criteria include its 50 V VRRM rating, 4.0 °C/W junction-to-case thermal resistance, UL E54214 recognition, halogen-free RoHS-compliant M3 termination, and PCB-mountable GBU case with 0.375" lead length.
Technical Context
The GBU8A-M3/51 integrates four silicon diodes in a single-phase full-wave bridge configuration with in-line terminal arrangement. Its glass passivation ensures stable reverse leakage (5 μA max at 25 °C) and high dielectric strength (1500 VRMS case isolation).
Designed for conduction-limited thermal management, it operates from –55 °C to +150 °C junction temperature and exhibits 68 pF typical junction capacitance per diode at 4 V / 1 MHz - critical for EMI-sensitive switching-mode power supply inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - maximum repetitive reverse voltage; defines safe AC input swing before breakdown in bridge configuration |
| IF(AV) | 8.0 A at TC = 60 °C - continuous DC output current capability when mounted on heatsink |
| IFSM | 200 A - withstands single half-sine surge (8.3 ms), essential for inrush protection in offline SMPS |
| VF @ 8.0 A | 1.0 V - low conduction loss enables >85 % rectifier efficiency at rated load |
| RθJC | 4.0 °C/W - enables direct bolt-down heatsink mounting for thermal reliability in 15 W–30 W power stages |
| IR @ 25 °C | 5 μA - minimal leakage preserves no-load regulation and reduces standby power loss |
| CJ @ 4 V | 68 pF - limits high-frequency noise coupling in EMI filter design |
Pinout & Package
Package: GBU case - molded thermoset housing with UL 94 V-0 flammability rating, matte tin-plated leads compliant with J-STD-002, and polarity marked on body (beveled corner denotes positive output).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AC1 | Input AC terminal 1 | One of two AC input nodes; accepts line or neutral in full-wave bridge configuration |
| AC2 | Input AC terminal 2 | Second AC input node; forms center-tapped input pair with AC1 |
| + | Positive DC output | Rectified anode-side output; connects to bulk capacitor positive rail |
| – | Negative DC output | Rectified cathode-side output; serves as circuit common/ground reference |
Key Features
| Feature | Design Value |
|---|---|
| UL recognition E54214 | Validates safety compliance for end-equipment certification in North America |
| 1500 VRMS case dielectric strength | Ensures isolation integrity between AC inputs and DC outputs under transient overvoltage |
| Halogen-free M3 termination | Meets IEC 61249-2-21 and JEDEC J-STD-20 requirements for green electronics manufacturing |
| Solder dip 275 °C / 10 s | Supports standard wave soldering without delamination or parameter shift |
| Junction temp. range –55 to +150 °C | Enables operation in industrial ambient environments without derating below –40 °C |
Applications
| Monitor Power Supply | Printer AC/DC Adapter |
|---|---|
Use Scenario: Converts 100–240 VAC mains to unregulated DC for downstream buck converter in LCD monitor power board. IC Role / Device Role / Timing Role: Primary rectifier stage delivering 8 A average DC output before filtering and regulation. Use Value: Low VF (1.0 V) minimizes heat generation in confined chassis; GBU package allows direct heatsink mounting for thermal stability. | Use Scenario: Provides full-wave rectified DC input to 24 V/3 A isolated flyback in laser printer main power module. IC Role / Device Role / Timing Role: Bridge rectifier converting universal AC input into high-voltage DC bus for transformer primary drive. Use Value: 200 A IFSM handles repeated motor startup surges; 5 μA IR prevents capacitor discharge during standby. |
| Audio Equipment PSU | Home Appliance Control Board |
Use Scenario: Supplies unregulated ±15 V rails via center-tapped transformer and dual GBU8A-M3/51 bridges in Class AB amplifier power supply. IC Role / Device Role / Timing Role: Dual bridge configuration provides symmetrical positive/negative DC outputs for op-amp biasing. Use Value: 68 pF CJ limits RF noise coupling into sensitive analog signal paths; UL E54214 supports safety agency approval. | Use Scenario: Rectifies 12 VAC control transformer output for microcontroller power rail in washing machine main board. IC Role / Device Role / Timing Role: Low-voltage bridge rectifier generating regulated 5 V DC for MCU, sensors, and relay drivers. Use Value: 50 V VRRM matches typical 12 VAC RMS (17 V peak); compact GBU footprint saves PCB space in dense control modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bridge rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| GBU8A-E3/51 | Same electrical specs; RoHS-compliant but not halogen-free (E3 vs M3 termination) | Acceptable where halogen-free requirement is not mandated by OEM spec or regional regulation | Select GBU8A-E3/51 for cost-sensitive commercial designs without green material mandates |
| KBU8A | Same 50 V VRRM, 8 A IF(AV), but KBU package has larger footprint and higher RθJA (25 °C/W vs 20 °C/W PCB mount) | Better suited for free-air operation; less optimal for heatsink-mounted thermal management | Choose KBU8A only if legacy PCB layout requires KBU outline or higher creepage distance is needed |
Compared with GBU8A-E3/51, the GBU8A-M3/51 adds halogen-free compliance without performance trade-off; versus KBU8A, it offers superior thermal resistance and smaller PCB area, making it preferred for space-constrained, thermally demanding applications.
Availability
GBU8A-M3/51 is available at Aetrix Electronics and suitable for monitor power supplies, printer adapters, audio equipment PSUs, and home appliance control boards requiring stable component supply and halogen-free compliance.
Supply support for GBU8A-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 industrial-grade performance.
The GBU series was engineered for high-efficiency, high-surge AC/DC conversion in compact consumer and industrial power supplies - prioritizing thermal robustness, safety certification, and PCB-mount versatility.
FAQ
What is the maximum operating temperature for GBU8A-M3/51?
The GBU8A-M3/51 has a specified operating junction temperature range of –55 °C to +150 °C. Its thermal resistance RθJC is 4.0 °C/W, meaning it can sustain full 8.0 A load at TC = 60 °C when properly mounted on a heatsink. Exceeding 150 °C risks permanent parametric shift or failure.
Does GBU8A-M3/51 support wave soldering?
Yes, GBU8A-M3/51 is qualified for solder dip at 275 °C maximum for 10 seconds per JESD 22-B106, making it compatible with standard wave soldering processes. Its matte tin-plated leads meet J-STD-002 solderability requirements, ensuring reliable wetting and joint formation.
What does the "M3" suffix mean in GBU8A-M3/51?
The "M3" suffix indicates halogen-free, RoHS-compliant construction meeting IEC 61249-2-21 and JEDEC J-STD-20 standards. Unlike the E3 variant, M3 uses bromine- and chlorine-free molding compounds and terminations - required for green electronics compliance in EU, China, and many OEM supply chains.
Can GBU8A-M3/51 replace GBU8A-E3/51 in existing designs?
Yes, GBU8A-M3/51 is a direct form-fit-function replacement for GBU8A-E3/51, sharing identical electrical specifications, GBU package dimensions, pinout, and thermal characteristics. The only difference is halogen-free material content - no PCB or thermal redesign is needed when upgrading to M3.
What is the reverse leakage current of GBU8A-M3/51 at elevated temperature?
At TA = 125 °C and rated DC blocking voltage, GBU8A-M3/51 exhibits a maximum reverse leakage current of 500 μA per diode. This is significantly higher than the 5 μA maximum at 25 °C, reflecting expected silicon behavior - designers must verify system-level standby loss and capacitor hold-up time under worst-case thermal conditions.
GBU8A-M3/51 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- -
- Package/Case:
- 4-SIP, GBU
- Packaging:
- Tray
- Product Status:
- Active
- Diode Type:
- Single Phase
- Technology:
- Standard
- Voltage - Peak Reverse (Max):
- 50 V
- Current - Average Rectified (Io):
- 3.9 A
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 8 A
- Current - Reverse Leakage @ Vr:
- 5 µA @ 50 V
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- GBU
GBU8A-M3/51 FAQ
1.How can I place an order for GBU8A-M3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for GBU8A-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 GBU8A-M3/51 reliable?
The price and inventory of GBU8A-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 GBU8A-M3/51 is usually 5 days.
3.What payment methods are accepted for GBU8A-M3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for GBU8A-M3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for GBU8A-M3/51?
GBU8A-M3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your GBU8A-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 GBU8A-M3/51?
For technical support, including GBU8A-M3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your GBU8A-M3/51 requirements.
6.How does Aetrix verify that GBU8A-M3/51 is sourced from the original manufacturer or authorized distributors?
All GBU8A-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 GBU8A-M3/51 meets industry standards.
7.What is the process for return or replacement of GBU8A-M3/51?
All GBU8A-M3/51 units undergo pre-shipment inspection (PSI). If there is an issue with GBU8A-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 GBU8A-M3/51 part is unused and in its original packaging.
Return procedure for GBU8A-M3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
GBU8A-M3/51 Tags
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