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Diodes Incorporated GBU401
- Part No.:
- GBU401
- Manufacturer:
- Diodes Incorporated
- Category:
- Bridge Rectifiers
- Package:
- 4-SIP, GBU
- Datasheet:
-
GBU401.pdf
- Description:
- BRIDGE RECT 1PHASE 100V 4A GBU
- Quantity:
- Payment:
- Shipping:
Inventory:403
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Product details
Overview
GBU401 from Diodes Incorporated is a 4.0A standard recovery bridge rectifier with 100V peak repetitive reverse voltage (VRRM), 1.0V max forward voltage at 2A, and 5µA max reverse leakage current at 25°C. It features glass-passivated die construction, 1500VRMS case dielectric strength, and is rated for 150A non-repetitive surge current. It is used in AC/DC power supplies for industrial control panels requiring robust through-hole rectification.
For engineers reviewing the GBU401 datasheet, GBU401 pinout, GBU401 application, or GBU401 equivalent, key selection criteria include VRRM rating for input voltage margin, IF(AV) derating at elevated case temperature, thermal resistance (RθJC = 2.2°C/W), and UL recognition (E95060) for safety-compliant designs.
Technical Context
The GBU401 integrates four silicon diodes in a single-phase full-wave bridge configuration with standard recovery characteristics (trr not specified, consistent with standard recovery classification). Its glass-passivated junction ensures stable reverse blocking under humid or contaminated PCB environments.
Designed for through-hole mounting with #6 screw support and 5.0 inch-pounds max torque, it delivers 4.0A average forward current at TC = +100°C when mounted on a 50mm × 50mm × 1.6mm copper heatsink, and exhibits 80pF typical junction capacitance at 1MHz and 4V reverse bias.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - Withstands 100V peak reverse voltage without breakdown; suitable for 70V RMS input (e.g., 100VAC nominal). |
| IF(AV) | 4.0 A @ TC = +100°C - Sustains 4A DC output current when case temperature is held at 100°C via heatsinking. |
| VF Max | 1.0 V @ IF = 2A - Contributes ≤2W conduction loss per half-cycle at 2A; impacts thermal design and efficiency. |
| IR Max | 5 µA @ VR = 100V, TA = +25°C - Ensures minimal standby power loss in low-power or battery-backed systems. |
| IFSM | 150 A (8.3ms half-sine) - Survives inrush surges from uncharged bulk capacitors in linear or transformer-fed supplies. |
| RθJC | 2.2 °C/W - Requires ≥2.2°C/W total thermal path (heatsink + interface) to limit junction rise to ≤88°C at 4A. |
| CT | 80 pF @ 1MHz, VR = 4V - Limits high-frequency noise coupling in EMI-sensitive switch-mode front-ends. |
Pinout & Package
Package: GBU - Molded plastic case (UL 94V-0), 3.7g weight, through-hole mounting with 4 axial leads. Polarity marked on body; designed for #6 screw mounting with 5.0 inch-pounds max torque.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ~ (AC1) | AC Input Terminal 1 | One of two AC input nodes; connects to transformer secondary or AC line; symmetrical with AC2. |
| ~ (AC2) | AC Input Terminal 2 | Second AC input node; completes full-wave bridge input path; interchangeable with AC1. |
| + (DC+) | Positive DC Output | Anode of internal upper diodes; delivers rectified positive output to filter capacitor or regulator. |
| – (DC–) | Negative DC Output / Common Return | Cathode of internal lower diodes; serves as system ground reference and return path. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die | Prevents moisture-induced leakage degradation and improves long-term reliability in humid or dusty enclosures. |
| 1500VRMS dielectric strength | Meets reinforced insulation requirements for Class I equipment; enables safe isolation between AC input and DC output circuits. |
| UL Recognized (E95060) | Validates compliance with UL 60747-1 and supports end-product safety certification without additional component-level testing. |
| Lead-free, RoHS-compliant plating | Enables compliance with EU RoHS directives (2011/65/EU, 2015/863/EU); tin-finish leads ensure solderability per MIL-STD-202, Method 208. |
| 150A surge rating | Supports reliable operation during cold-start conditions with large input capacitors, reducing need for external NTC thermistors. |
Applications
| Industrial AC/DC Power Supply | Appliance Motor Control Board |
|---|---|
Use Scenario: Converts 85–264VAC mains to unregulated DC bus for downstream switching regulators in PLC power modules. IC Role / Device Role / Timing Role: Primary rectification stage; provides isolated, full-wave DC output before bulk capacitance and regulation. Use Value: 100V VRRM provides 30% margin over 70V RMS (100VAC), while 4A IF(AV) supports up to 48W continuous output before derating. | Use Scenario: Rectifies 24VAC control transformer output to power relay drivers and logic circuitry in washing machine control boards. IC Role / Device Role / Timing Role: AC-to-DC conversion for low-voltage auxiliary rails; operates in ambient temperatures up to +85°C. Use Value: 5µA IR at 25°C minimizes standby drain; glass passivation prevents corrosion in high-humidity laundry environments. |
| LED Driver Input Stage | DC Power Distribution Module |
Use Scenario: Front-end rectification in constant-current LED drivers for street lighting, fed from 120VAC or 230VAC distribution. IC Role / Device Role / Timing Role: Unregulated DC source generation; feeds PFC controller or buck converter ICs. Use Value: 150A IFSM withstands repeated lamp hot-restrike surges; UL recognition simplifies regional safety approvals. | Use Scenario: Central rectification unit in DIN-rail mounted 24VDC power distribution panels for factory automation I/O systems. IC Role / Device Role / Timing Role: High-current, field-serviceable AC/DC conversion node; mounted with screw terminals for mechanical robustness. Use Value: Through-hole GBU package enables secure mechanical retention and thermal coupling to metal chassis; 2.2°C/W RθJC supports passive cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bridge rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| GBU4J (ON Semiconductor) | Same 100V VRRM, 4A IF(AV), but VF = 1.1V max @ 2A; slightly higher conduction loss. | Lacks UL recognition; requires additional safety validation for end-equipment certification. | Acceptable where UL listing is not required and thermal margin permits 0.1V higher VF. |
| KBU4B (Comchip) | 100V VRRM, 4A IF(AV), VF = 1.05V max @ 2A; 1000VRMS isolation rating. | RoHS compliant but not lead-free plating per MIL-STD-202; no automotive qualification path. | Preferred for cost-sensitive industrial designs where 500VRMS margin suffices and lead-free process is optional. |
Compared with GBU4J and KBU4B, the GBU401 offers superior safety compliance (UL E95060), lower forward voltage, and guaranteed lead-free plating-making it optimal for certified industrial and appliance designs where reliability and regulatory alignment are critical.
Availability
GBU401 is available at Aetrix Electronics and suitable for industrial AC/DC power supplies, appliance motor control boards, and LED driver input stages requiring stable component supply, long-lifecycle availability, and traceable sourcing.
Supply support for GBU401 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/DC conversion in industrial, appliance, and lighting applications where fast recovery is not required.
FAQ
What is the maximum case temperature for continuous operation of the GBU401?
The GBU401 supports 4.0A average forward current at TC = +100°C when mounted on a 50mm × 50mm × 1.6mm copper heatsink. Operation above this temperature requires derating per Figure 1 in DS21225; at TC = +125°C, IF(AV) drops to approximately 3.2A. Junction temperature must remain ≤+150°C.
Is the GBU401 suitable for use in automotive applications?
The GBU401 is not AEC-Q101 qualified and is not intended for automotive under-hood applications. Diodes states that automotive-grade variants require specific change control, PPAP capability, and IATF 16949 manufacturing-contact Diodes directly for qualified alternatives like the GBU4ABQ series.
How does the GBU401's thermal resistance affect heatsink selection?
With RθJC = 2.2°C/W, a 4A load generating ~4W (VF × IF ≈ 1.0V × 4A) requires ≤8.8°C temperature rise from case to junction. To maintain TJ ≤+150°C at TA = +70°C, total system RθJA must be ≤20°C/W-so heatsink + interface resistance must be ≤17.8°C/W.
Does the GBU401 have polarity markings, and how are terminals identified?
Yes-the GBU401 body is marked with "+", "–", and "~" symbols. The "+" terminal is the positive DC output, "–" is the negative DC return, and the two "~" terminals are AC inputs (interchangeable). Pin layout follows standard GBU outline: AC1–AC2–DC+–DC– in linear sequence across the package base.
GBU401 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):
- 100 V
- Current - Average Rectified (Io):
- 4 A
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 2 A
- Current - Reverse Leakage @ Vr:
- 5 µA @ 100 V
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- GBU
GBU401 FAQ
1.How can I place an order for GBU401 through Aetrix?
Please submit a Request for Quotation (RFQ) for GBU401 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 GBU401 reliable?
The price and inventory of GBU401 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for GBU401 is usually 5 days.
3.What payment methods are accepted for GBU401?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for GBU401 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for GBU401?
GBU401 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your GBU401 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 GBU401?
For technical support, including GBU401 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your GBU401 requirements.
6.How does Aetrix verify that GBU401 is sourced from the original manufacturer or authorized distributors?
All GBU401 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 GBU401 meets industry standards.
7.What is the process for return or replacement of GBU401?
All GBU401 units undergo pre-shipment inspection (PSI). If there is an issue with GBU401, 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 GBU401 part is unused and in its original packaging.
Return procedure for GBU401:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
GBU401 Tags
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