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Diodes Incorporated GBU406
- Part No.:
- GBU406
- Manufacturer:
- Diodes Incorporated
- Category:
- Bridge Rectifiers
- Package:
- 4-SIP, GBU
- Datasheet:
-
GBU406.pdf
- Description:
- BRIDGE RECT 1PHASE 600V 4A GBU
- Quantity:
- Payment:
- Shipping:
Inventory:8,500
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Product details
Overview
GBU406 from Diodes Incorporated is a 4.0A, 600V standard recovery bridge rectifier in GBU package, featuring 1.0V max forward voltage at 2A, 5µA max reverse leakage at 25°C, 150A non-repetitive surge rating, and UL recognition (E95060). It serves as AC-to-DC front-end rectification in offline power supplies for industrial motor drives and HVAC control boards.
For engineers reviewing the GBU406 datasheet, GBU406 pinout, GBU406 application, or GBU406 equivalent, key selection criteria include peak repetitive reverse voltage (600V), average forward current (4.0A at TC=100°C), thermal resistance (2.2°C/W), surge capability (150A @ 8.3ms), and through-hole mounting compatibility with #6 screw.
Technical Context
The GBU406 integrates four silicon diodes in a single-phase full-wave bridge configuration with glass-passivated die construction, enabling stable operation across -55°C to +150°C junction temperature range. Its 1500VRMS case dielectric strength and 93A²s I²t fusing rating support robust isolation and short-circuit withstand in mains-connected equipment.
Designed for resistive/inductive loads at 60Hz, it requires 20% current derating under capacitive loading. Thermal performance is specified with a 50mm × 50mm × 1.6mm copper heatsink, yielding 2.2°C/W junction-to-case resistance - critical for thermal design in enclosed power enclosures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 600 V - Withstands 600V peak reverse voltage without breakdown in AC line applications. |
| IF(AV) | 4.0 A at TC = +100°C - Sustains continuous 4A DC output when case temperature is held at 100°C. |
| VF Max | 1.0 V @ IF = 2A - Limits conduction loss to ≤2W per half-cycle in typical bridge operation. |
| IR Max | 5 µA @ VR = 600V, TA = +25°C - Ensures minimal standby power loss in high-impedance hold-up circuits. |
| IFSM | 150 A @ 8.3ms - Survives cold-start inrush surges common in transformer-coupled SMPS inputs. |
| RθJC | 2.2 °C/W - Enables accurate junction temperature estimation using measured case temperature. |
| CT | 80 pF @ 1MHz, VR = 4V - Contributes predictable EMI filtering behavior in snubberless designs. |
Pinout & Package
Package: GBU molded plastic case (UL 94V-0), through-hole mount, weight ≈3.7 g, polarity marked on body, designed for #6 screw mounting with max 5.0 in-lb torque.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AC1 | Input AC terminal 1 | One of two AC input nodes; connects to live/neutral side of transformer secondary or line filter. |
| AC2 | Input AC terminal 2 | Second AC input node; completes full-wave bridge input path with AC1. |
| + (Anode) | Positive DC output | Delivers rectified positive DC voltage to bulk capacitor or downstream regulator. |
| – (Cathode) | Negative DC output / return | Serves as DC common reference and return path for load current. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated die | Enhances long-term reliability and moisture resistance in humid industrial environments. |
| 1500VRMS dielectric strength | Meets reinforced insulation requirements for Class I appliances and industrial controls. |
| 150A surge rating | Supports repeated cold-start events without degradation in motor drive power stages. |
| UL Recognized (E95060) | Reduces certification effort for end-equipment safety approvals in North America. |
| Lead-free, RoHS-compliant plating | Enables compliance with environmental regulations and Pb-free soldering processes. |
Applications
| Industrial Motor Drives | HVAC Control Boards |
|---|---|
Use Scenario: Rectifying 230VAC transformer output to feed DC bus for 3-phase IGBT inverter stage. IC Role / Device Role / Timing Role: Front-end bridge rectifier providing unregulated DC input to bulk capacitor and inverter stage. Use Value: 600V VRRM ensures margin against line transients; 150A IFSM handles motor startup surges without failure. | Use Scenario: Converting 24VAC control transformer output to DC for microcontroller and relay driver circuitry. IC Role / Device Role / Timing Role: AC-to-DC conversion for low-power auxiliary supply in zone-based climate controllers. Use Value: Low 5µA IR minimizes standby current draw; UL recognition simplifies system-level safety certification. |
| AC-DC Power Adapters | LED Driver Power Supplies |
Use Scenario: Input rectification in 36W open-frame power supply for industrial instrumentation. IC Role / Device Role / Timing Role: Primary-side bridge rectifier feeding bulk capacitor and flyback controller IC. Use Value: 4.0A IF(AV) supports continuous operation at full load; 2.2°C/W RθJC enables compact heatsinking. | Use Scenario: Rectifying 120VAC line input in constant-current LED driver for street lighting. IC Role / Device Role / Timing Role: Mains-connected bridge rectifier delivering DC to PFC and LED current regulation stage. Use Value: 80pF CT contributes predictable high-frequency noise profile for EMI filter design. |
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 600V VRRM, 4.0A IF(AV), but VF = 1.1V max @ 2A; slightly higher conduction loss. | Identical pinout and package; suitable for drop-in replacement where 0.1V VF increase is acceptable. | Select if sourcing diversification is required and thermal margin allows 0.1V higher VF. |
| KBU406 (Comchip) | 600V VRRM, 4.0A IF(AV), VF = 1.05V max @ 2A; IR = 10µA max @ 25°C - double GBU406's leakage. | Same GBU package and pinout; higher IR may impact efficiency in low-power standby modes. | Prefer for cost-sensitive designs where 5µA vs. 10µA leakage is not critical. |
Compared with GBU406, GBU4J trades 0.1V higher forward voltage for alternate supply chain access, while KBU406 offers lower cost but doubles reverse leakage - making GBU406 optimal for thermally constrained or ultra-low-standby applications.
Availability
GBU406 is available at Aetrix Electronics and suitable for industrial motor drives, HVAC control boards, AC-DC power adapters, and LED driver power supplies requiring stable component supply and long-term manufacturability.
Supply support for GBU406 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 the Americas.
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 infrastructure power systems.
FAQ
What is the maximum allowable case temperature for continuous operation?
The GBU406 supports continuous operation up to +100°C case temperature, delivering its rated 4.0A average forward current under that condition. Exceeding this temperature requires derating per Figure 1 in the datasheet, where current drops linearly to zero at +150°C case temperature.
Can GBU406 be used in capacitive-input filter configurations?
Yes, but with 20% reduction in average forward current rating - limiting IF(AV) to 3.2A at TC = +100°C. This derating accounts for higher peak currents drawn by capacitor-input filters, which increase thermal stress and reduce reliability if ignored.
Is GBU406 qualified for automotive applications?
No - GBU406 is not AEC-Q101 qualified. Diodes states that automotive-grade versions require specific change control, PPAP capability, and IATF 16949 manufacturing; users must contact Diodes directly for such variants, as GBU406 is intended for industrial/commercial use only.
What is the recommended PCB footprint and mounting torque?
The GBU406 uses a standard GBU outline with 5.0 in-lb maximum mounting torque for #6 screws. PCB footprint should accommodate lead spacing per datasheet dimensions (e.g., A = 21.8–22.3 mm, J = 17.5–18.0 mm); copper pad area must support 50 mm × 50 mm heatsinking for full 4.0A rating.
GBU406 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):
- 600 V
- Current - Average Rectified (Io):
- 4 A
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 2 A
- Current - Reverse Leakage @ Vr:
- 5 µA @ 600 V
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- GBU
GBU406 FAQ
1.How can I place an order for GBU406 through Aetrix?
Please submit a Request for Quotation (RFQ) for GBU406 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 GBU406 reliable?
The price and inventory of GBU406 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for GBU406 is usually 5 days.
3.What payment methods are accepted for GBU406?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for GBU406 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for GBU406?
GBU406 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your GBU406 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 GBU406?
For technical support, including GBU406 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your GBU406 requirements.
6.How does Aetrix verify that GBU406 is sourced from the original manufacturer or authorized distributors?
All GBU406 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 GBU406 meets industry standards.
7.What is the process for return or replacement of GBU406?
All GBU406 units undergo pre-shipment inspection (PSI). If there is an issue with GBU406, 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 GBU406 part is unused and in its original packaging.
Return procedure for GBU406:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
GBU406 Tags
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