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Taiwan Semiconductor Corporation GBU404-K
- Part No.:
- GBU404-K
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Bridge Rectifiers
- Package:
- 4-ESIP, GBU
- Datasheet:
-
GBU404-K.pdf
- Description:
- BRIDGE RECT 1PHASE 400V 4A GBU
- Quantity:
- Payment:
- Shipping:
Inventory:2,389
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Product details
Overview
GBU404-K from Taiwan Semiconductor is a 4A, 400V standard bridge rectifier in GBU package, featuring 1500VRMS dielectric strength, 150A surge capability, and 4.0g mass. It serves as AC-to-DC conversion front-end in compact off-line power supplies.
For engineers reviewing the GBU404-K datasheet, GBU404-K pinout, GBU404-K application, or GBU404-K equivalent, key selection criteria include repetitive peak reverse voltage (400V), forward current rating (4A), thermal resistance (RθJA = 20°C/W), junction temperature range (–55°C to +150°C), and UL recognition (E-326243).
Technical Context
The GBU404-K integrates four silicon diodes in a single-phase full-wave bridge configuration with quad anode-cathode topology. Its 4A average forward current rating and 150A non-repetitive surge current support transient-heavy input stages.
Thermal performance is defined by RθJC = 4°C/W and RθJA = 20°C/W, enabling operation up to +150°C junction temperature. Dielectric isolation withstands 1500VRMS between case and terminals per UL 94V-0 molding compound.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - Maximum repetitive reverse voltage the device blocks without breakdown |
| IF | 4 A - Continuous average forward current per bridge leg at 25°C ambient |
| IFSM | 150 A - Peak non-repetitive surge current for 8.3 ms half-sine wave |
| VF @ 4A | 1.1 V max - Forward voltage drop per diode at rated current, defining conduction loss |
| RθJA | 20 °C/W - Junction-to-ambient thermal resistance, critical for heatsink sizing |
| TJ max | +150 °C - Maximum allowable junction temperature under continuous operation |
| CJ | 100 pF - Junction capacitance per diode at 1 MHz and 4 V reverse bias, affecting high-frequency noise |
Pinout & Package
Package: GBU - 4-pin, single-in-line (SIP) molded plastic case with matte tin-plated leads, UL 94V-0 rated, 4.00 g typical weight, mounting torque ≤ 0.56 N·m.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AC1 | Input AC terminal 1 | One of two alternating-current input pins; connected internally to anode of D1 and cathode of D2 |
| AC2 | Input AC terminal 2 | Second AC input pin; connected internally to cathode of D1 and anode of D2 |
| + | DC output positive | Common cathode node of D1 and D3; delivers rectified positive DC output |
| – | DC output negative | Common anode node of D2 and D4; serves as rectified negative/return path |
Key Features
| Feature | Design Value |
|---|---|
| UL Recognition | File # E-326243 - Confirms compliance with safety standards for end-equipment certification |
| Dielectric Strength | 1500 VRMS - Ensures safe isolation between AC inputs and case/mounting surface |
| Surge Rating | 150 A IFSM - Supports robust inrush current handling during cold-start of SMPS |
| RoHS & Halogen-Free | Compliant per IEC 61249-2-21 - Meets environmental requirements for global manufacturing |
| Thermal Resistance | RθJC = 4 °C/W - Enables efficient heat transfer to heatsink or PCB copper pour |
Applications
| Switching Mode Power Supply (SMPS) | AC-DC Adapters |
|---|---|
Use Scenario: Front-end rectification in 20–60W offline flyback converters with universal AC input (85–265VAC). IC Role / Device Role / Timing Role: Standard bridge rectifier converting AC line to unregulated DC bus prior to PFC or PWM controller stage. Use Value: 4A rating and 150A surge capacity accommodate startup surges and maintain reliability across wide input voltage ranges. | Use Scenario: Compact wall-mount adapters for consumer electronics requiring low-profile, cost-effective AC/DC conversion. IC Role / Device Role / Timing Role: Primary-side bridge rectifier delivering DC input to secondary-side regulation ICs like optocoupler-feedback controllers. Use Value: GBU package enables through-hole mounting on dense PCBs while maintaining 1500VRMS isolation for safety compliance. |
| LED Lighting Drivers | Industrial Control Power Supplies |
Use Scenario: Constant-voltage LED drivers in commercial downlights and panel lights operating from 120/230VAC mains. IC Role / Device Role / Timing Role: Input-stage rectifier feeding buck or buck-boost DC/DC converters powering LED strings. Use Value: 100pF junction capacitance minimizes high-frequency noise coupling into sensitive current-sense paths. | Use Scenario: Auxiliary power supplies for PLC I/O modules and motor drive control boards requiring long-term operational stability. IC Role / Device Role / Timing Role: Mains-fed bridge rectifier supplying isolated 12–24V logic rails via linear or switching regulators. Use Value: –55°C to +150°C storage/junction range ensures functionality in uncontrolled industrial enclosures with thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bridge rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| GBU4K (ON Semiconductor) | Same 4A/400V rating, but RθJA = 25°C/W; no UL file number listed | Lacks UL recognition; may require additional safety testing in certified end equipment | Select when UL compliance is not mandated and higher thermal resistance is acceptable |
| KBU404 (Shindengen) | Identical 4A/400V specs, 150A IFSM, but CJ = 85pF; RoHS compliant, no halogen-free claim | Slightly lower junction capacitance reduces EMI in high-frequency designs; halogen-free status not verified | Prefer for EMI-sensitive lighting drivers where halogen content is not regulated |
Compared with GBU4K and KBU404, the GBU404-K offers verified UL recognition, halogen-free construction, and superior thermal resistance (RθJA = 20°C/W), making it optimal for safety-critical, thermally constrained, and environmentally regulated applications.
Availability
GBU404-K is available at Aetrix Electronics and suitable for switching mode power supplies, AC-DC adapters, and LED lighting drivers requiring stable component supply, consistent parametric performance, and long-term manufacturability.
Supply support for GBU404-K 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global power electronics markets since 1979.
The GBU series bridges are designed specifically for cost-sensitive, high-volume AC/DC front-end applications demanding reliability, safety certification, and thermal efficiency in compact through-hole packages.
FAQ
What is the maximum repetitive peak reverse voltage rating for GBU404-K?
The GBU404-K has a maximum repetitive peak reverse voltage (VRRM) of 400 V. This rating defines the highest AC voltage the device can block in reverse bias without entering avalanche breakdown. It is validated per the absolute maximum ratings table in the official TSC datasheet Version E2103 and applies across the full operating temperature range.
Does GBU404-K meet UL safety standards?
Yes, the GBU404-K is UL Recognized with File # E-326243. This certification confirms compliance with UL 60747-4 for semiconductor devices and validates its dielectric strength of 1500 VRMS between terminals and case. UL recognition supports end-product safety approvals for Class II and Class I power supplies.
What is the forward voltage drop of GBU404-K at full rated current?
At 4 A forward current and 25°C junction temperature, the GBU404-K exhibits a maximum forward voltage drop (VF) of 1.1 V per diode. This value is specified under pulsed test conditions (PW = 0.3 ms) and directly impacts conduction losses and thermal design in high-efficiency power supplies.
Can GBU404-K be used in high-temperature environments?
Yes, the GBU404-K supports continuous operation up to +150°C junction temperature (TJ max) and storage from –55°C to +150°C. Its RθJC of 4°C/W enables effective heat transfer to a heatsink, making it suitable for enclosed industrial power supplies where ambient temperatures exceed 70°C.
Is GBU404-K lead-free and RoHS compliant?
Yes, the GBU404-K is RoHS compliant and halogen-free per IEC 61249-2-21. Its matte tin-plated leads meet J-STD-002 solderability requirements, and the GBU package molding compound satisfies UL 94V-0 flammability rating - all confirmed in the official TSC documentation.
GBU404-K Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- 4-ESIP, 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:
- 1.1 V @ 4 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-K FAQ
1.How can I place an order for GBU404-K through Aetrix?
Please submit a Request for Quotation (RFQ) for GBU404-K 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-K reliable?
The price and inventory of GBU404-K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for GBU404-K is usually 5 days.
3.What payment methods are accepted for GBU404-K?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for GBU404-K transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for GBU404-K?
GBU404-K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your GBU404-K 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-K?
For technical support, including GBU404-K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your GBU404-K requirements.
6.How does Aetrix verify that GBU404-K is sourced from the original manufacturer or authorized distributors?
All GBU404-K 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-K meets industry standards.
7.What is the process for return or replacement of GBU404-K?
All GBU404-K units undergo pre-shipment inspection (PSI). If there is an issue with GBU404-K, 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-K part is unused and in its original packaging.
Return procedure for GBU404-K:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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