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Diodes Incorporated GBU404
- Part No.:
- GBU404
- Manufacturer:
- Diodes Incorporated
- Category:
- Bridge Rectifiers
- Package:
- 4-SIP, GBU
- Datasheet:
-
GBU404.pdf
- Description:
- BRIDGE RECT 1PHASE 400V 4A GBU
- Quantity:
- Payment:
- Shipping:
Inventory:3,344
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Product details
Overview
GBU404 from Diodes Incorporated is a 4.0A standard recovery bridge rectifier in GBU package, rated for 400V peak repetitive reverse voltage (VRRM), 1.0V max forward voltage at 2A, and 5µA max reverse leakage at 25°C. It delivers robust AC-to-DC conversion in offline power supplies, motor control front-ends, and industrial SMPS input stages.
For engineers reviewing the GBU404 datasheet, GBU404 pinout, GBU404 application, or GBU404 equivalent, key selection criteria include its 150A non-repetitive surge rating, 2.2°C/W junction-to-case thermal resistance, UL recognition (E95060), RoHS-compliant lead-free plating, and through-hole mounting compatibility with #6 screw hardware.
Technical Context
This single-phase, full-wave bridge rectifier integrates four silicon diodes in a molded plastic GBU package with glass-passivated die construction. Its 1500VRMS dielectric strength and 5µA IR at 25°C support reliable operation under transient overvoltage and high-humidity conditions.
Designed for resistive or inductive loads at 60Hz, it requires 20% current derating for capacitive loads. Thermal performance is specified with a 50mm × 50mm × 1.6mm copper heatsink, enabling sustained 4.0A average output at TC = +100°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - Maximum peak reverse voltage the device blocks without breakdown in repetitive operation. |
| IF(AV) | 4.0 A @ TC = +100°C - Sustained average forward current capability when case temperature is maintained at 100°C. |
| VF Max | 1.0 V @ IF = 2.0A - Forward voltage drop per diode pair at rated DC load, directly impacting conduction loss and thermal design. |
| IR Max | 5 µA @ VR = 400V, TA = +25°C - Reverse leakage current limiting power loss and ensuring stability in high-impedance bias networks. |
| IFSM | 150 A @ 8.3ms half-sine - Surge withstand capability during cold-start or line transients, critical for input-stage reliability. |
| RθJC | 2.2 °C/W - Junction-to-case thermal resistance measured on 50mm × 50mm × 1.6mm copper heatsink, defining heatsink sizing requirements. |
Pinout & Package
Package: GBU - Molded plastic, UL 94V-0 rated, through-hole mountable with #6 screw, 3.7g mass, polarity marked on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AC1 | Input AC Terminal 1 | One of two alternating-current input pins; connects to live/phase side of transformer secondary or AC line. |
| AC2 | Input AC Terminal 2 | Second AC input pin; completes full-wave bridge input path with AC1, enabling bidirectional conduction. |
| + (Anode Output) | Positive DC Output | Common anode node of internal diode pair; delivers rectified positive DC voltage to filter capacitor or regulator input. |
| – (Cathode Output) | Negative DC Output / Ground Reference | Common cathode node; serves as return path and system ground reference for downstream DC circuitry. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated die | Enhances long-term reliability and moisture resistance in humid or contaminated environments. |
| 1500VRMS dielectric strength | Ensures safe isolation between AC inputs and DC outputs under high-voltage stress and safety testing. |
| UL Recognized (E95060) | Validates compliance with UL 60747-4 for discrete semiconductors, supporting end-equipment certification. |
| Lead-free, RoHS-compliant plating | Meets global environmental regulations and supports automated soldering processes per MIL-STD-202. |
Applications
| Industrial AC-DC Power Supply | Appliance Motor Control Front-End |
|---|---|
|
Use Scenario: Converts 230VAC mains to unregulated DC in industrial programmable logic controller (PLC) power modules. IC Role / Device Role / Timing Role: Full-wave bridge rectifier providing isolated, high-current DC bus for downstream buck converters and LDOs. Use Value: 150A surge rating absorbs inrush from large input capacitors; 400V VRRM accommodates 230VAC ±10% with margin. |
Use Scenario: Rectifies transformer-coupled AC to DC for universal motor speed control in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Input-stage bridge delivering filtered DC to TRIAC or MOSFET-based phase-control circuits. Use Value: Low 5µA IR minimizes standby power loss; glass passivation ensures resilience against detergent vapor and condensation. |
| LED Driver Input Stage | UPS Input Rectification |
|
Use Scenario: Provides bulk DC for constant-current LED drivers in commercial lighting fixtures operating from 120/230VAC. IC Role / Device Role / Timing Role: Primary rectification element feeding PFC stage or non-isolated buck-boost converter. Use Value: 2.2°C/W RθJC enables compact heatsinking in thermally constrained enclosures; UL recognition simplifies safety approval. |
Use Scenario: Rectifies utility AC input in line-interactive UPS systems before battery charging and inverter stages. IC Role / Device Role / Timing Role: High-reliability bridge handling continuous 4A load plus frequent 150A surges during transfer events. Use Value: 1500VRMS isolation withstands fast-rising line transients; molded GBU package resists vibration and mechanical shock. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bridge rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay GBU4K | Same 400V VRRM and 4A IF(AV), but VF = 1.1V max @ 2A; slightly higher conduction loss. | Identical pinout and package; validated in automotive-grade designs per AEC-Q101. | Select for AEC-Q101-compliant automotive systems where qualification documentation is mandatory. |
| ON Semiconductor GBPC404 | 400V VRRM, 4A IF(AV), but VF = 1.05V max @ 2A; IFSM = 130A (lower surge tolerance). | GBPC package has larger footprint and different mounting geometry; not drop-in compatible. | Choose when existing PCB layout uses GBPC outline and lower surge margin is acceptable. |
Compared with GBU404, GBU4K offers automotive qualification at marginally higher VF, while GBPC404 trades surge robustness for legacy footprint compatibility-neither matches GBU404's combination of UL recognition, 150A surge, and GBU package mechanical fit.
Availability
GBU404 is available at Aetrix Electronics and suitable for industrial AC-DC power supplies, appliance motor control front-ends, and LED driver input stages requiring stable component supply, long-lifecycle support, and UL-recognized reliability.
Supply support for GBU404 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The GBU series belongs to Diodes' standard recovery bridge rectifier product line, engineered for cost-effective, high-reliability AC-to-DC conversion in general-purpose industrial and consumer power applications.
FAQ
What is the maximum allowable case temperature for continuous 4.0A operation?
The GBU404 supports 4.0A average forward current only when the case temperature (TC) is held at or below +100°C, as defined in the Absolute Maximum Ratings table. Exceeding this temperature requires derating per Figure 1, where current drops to ~2.8A at TC = +125°C. Proper heatsinking using a 50mm × 50mm × 1.6mm copper plate is required to achieve the full 4.0A rating.
Is the GBU404 suitable for use with capacitive-input filters?
Yes, but with mandatory 20% current derating per the datasheet's "Maximum Ratings" note. For example, at TC = +100°C, the usable IF(AV) reduces from 4.0A to 3.2A. This accounts for increased peak currents and RMS heating caused by the sharp conduction angle of capacitor-input rectifiers.
Does the GBU404 have automotive qualification?
No-the GBU404 is not AEC-Q101 qualified. While Diodes offers automotive-grade variants in the same family (e.g., GBU404Q), the standard GBU404 is intended for industrial and commercial applications. Automotive users must specify the "Q" suffix part and confirm PPAP readiness with Diodes' automotive team.
How is polarity marked on the GBU404 package?
Polarity is marked on the body of the GBU404: a white band identifies the cathode output (–) terminal, while the opposite corner marks the anode output (+). The two AC input terminals (AC1 and AC2) are unmarked but located adjacent to the banded end, aligned with the package's symmetry axis as shown in the official GBU outline drawing.
GBU404 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 4-SIP, GBU
- Packaging:
- Tube
- Product Status:
- Active
- Diode Type:
- Single Phase
- Technology:
- Standard
- Voltage - Peak Reverse (Max):
- 400 V
- Current - Average Rectified (Io):
- 4 A
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 2 A
- Current - Reverse Leakage @ Vr:
- 5 µA @ 400 V
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- GBU
GBU404 FAQ
1.How can I place an order for GBU404 through Aetrix?
Please submit a Request for Quotation (RFQ) for GBU404 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 GBU404 reliable?
The price and inventory of GBU404 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for GBU404 is usually 5 days.
3.What payment methods are accepted for GBU404?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for GBU404 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for GBU404?
GBU404 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your GBU404 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 GBU404?
For technical support, including GBU404 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your GBU404 requirements.
6.How does Aetrix verify that GBU404 is sourced from the original manufacturer or authorized distributors?
All GBU404 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 GBU404 meets industry standards.
7.What is the process for return or replacement of GBU404?
All GBU404 units undergo pre-shipment inspection (PSI). If there is an issue with GBU404, 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 GBU404 part is unused and in its original packaging.
Return procedure for GBU404:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
GBU404 Tags
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