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Home > Products > Discrete Semiconductor Products > Diodes > Bridge Rectifiers

Taiwan Semiconductor Corporation GBU406-K

Name: GBU406-K
Brand: Taiwan Semiconductor Corporation
SKU: GBU406-K
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: GBU406-K

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Bridge Rectifiers

Package:: 4-ESIP, GBU

Datasheet:: GBU406-K.pdf

Description:: BRIDGE RECT 1PHASE 800V 4A GBU

Quantity:: RFQ Add To RFQ list

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Inventory:4,572

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Product details

Overview

GBU406-K from Taiwan Semiconductor is a 4A, 800V repetitive peak reverse voltage (V_RRM) standard single-phase bridge rectifier in GBU package, featuring 150A surge current capability (I_FSM), 4°C/W junction-to-case thermal resistance (R_θJC), and UL Recognized File #E-326243 - used in AC/DC front-end stages of offline SMPS.

For engineers reviewing the GBU406-K datasheet, GBU406-K pinout, GBU406-K application, or GBU406-K equivalent, key selection criteria include V_RRM = 800V, I_F = 4A, I_FSM = 150A, R_θJC = 4°C/W, and GBU package compatibility with PCB-mount high-reliability power conversion designs.

Technical Context

The GBU406-K integrates four silicon diodes in a single-phase full-wave bridge configuration, enabling AC-to-DC conversion without external interconnection. Its 800V V_RRM rating supports universal input (85–265V_AC) operation in compact adapters and lighting drivers.

Thermally optimized for through-hole mounting, it delivers 20°C/W junction-to-ambient resistance (R_θJA) under standard PCB conditions and maintains ≤1.1V forward voltage (V_F) at 4A/25°C - critical for conduction loss management in 25–65W power supplies.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	800 V - supports 560 V_RMS input, enabling use in 230V_AC mains applications with safety margin
I_F	4 A continuous average forward current - defines maximum steady-state DC output current capability
I_FSM	150 A peak surge (8.3 ms half-sine) - withstands inrush currents during cold-start of capacitive-input SMPS
R_θJC	4 °C/W - enables efficient heat transfer to heatsink or copper pour, limiting junction rise under full load
V_F	1.1 V max at 4A/25°C - determines conduction loss (P_cond ≈ 4.4 W per device at full load)
C_J	45 pF per diode at 1 MHz / 4V - impacts EMI filter design and high-frequency switching noise coupling
T_J max	150 °C - sets maximum allowable junction temperature for reliability-limited lifetime calculations

Pinout & Package

Package: GBU - molded plastic case with matte tin-plated leads, UL 94V-0 rated, 4.0 g weight, designed for through-hole PCB mounting with 0.56 N·m max torque.

Pin/Terminal	Circuit Role	Design Meaning
~AC1	AC input terminal 1	One leg of AC input; connects to live or neutral depending on board layout - not polarity-sensitive
~AC2	AC input terminal 2	Second leg of AC input; completes full-wave bridge input path with ~AC1
+DC	Positive DC output	Anode of internal upper diodes; delivers rectified positive rail to bulk capacitor or PFC stage
–DC	Negative DC output	Cathode of internal lower diodes; serves as return path and system ground reference

Key Features

Feature	Design Value
UL Recognition (File #E-326243)	Validates compliance with UL 60747-5-1 for discrete semiconductors - required for end-product safety certification
1500 V_RMS dielectric strength	Ensures isolation integrity between AC inputs and DC outputs under transient overvoltage stress (e.g., lightning surges)
RoHS & halogen-free (IEC 61249-2-21)	Meets environmental compliance mandates for commercial and industrial electronics sold in EU, China, and North America
4°C/W R_θJC	Enables direct thermal interface to chassis or heatsink - reduces need for oversized copper areas in space-constrained adapters

Applications

Switching Mode Power Supply (SMPS)	AC/DC Adapters
Use Scenario: Front-end rectification in 30–60W open-frame SMPS for industrial control modules. IC Role / Device Role / Timing Role: Single-phase bridge rectifier converting 85–265V_AC input to unregulated DC bus prior to PFC or flyback stage. Use Value: 800V V_RRM provides 2× safety margin over 230V_AC peak (325V), ensuring long-term reliability under line transients.	Use Scenario: Compact wall-mounted USB-C PD adapters with universal input range. IC Role / Device Role / Timing Role: Primary-side AC/DC conversion element in low-profile, thermally constrained enclosure. Use Value: 4°C/W R_θJC allows direct mounting to metal housing, eliminating need for thermal pads or extra airflow.
LED Lighting Drivers	Industrial Control Power Supplies
Use Scenario: Constant-voltage LED driver for outdoor signage operating in ambient temperatures up to 70°C. IC Role / Device Role / Timing Role: Input-stage rectifier feeding buck or flyback controller ICs with wide input range requirements. Use Value: 150A I_FSM handles repeated cold-start surges into large electrolytic banks without degradation.	Use Scenario: DIN-rail mounted PLC power module requiring continuous operation at 60°C ambient. IC Role / Device Role / Timing Role: Mains-fed bridge rectifier supplying isolated DC rails to microcontroller, I/O, and communication circuitry. Use Value: UL Recognition and 150°C T_J max support extended lifetime under sustained thermal stress per IEC 61800-5-1.

Switching Mode Power Supply (SMPS)

AC/DC Adapters

Use Scenario: Front-end rectification in 30–60W open-frame SMPS for industrial control modules.

IC Role / Device Role / Timing Role: Single-phase bridge rectifier converting 85–265V_AC input to unregulated DC bus prior to PFC or flyback stage.

Use Value: 800V V_RRM provides 2× safety margin over 230V_AC peak (325V), ensuring long-term reliability under line transients.

Use Scenario: Compact wall-mounted USB-C PD adapters with universal input range.

IC Role / Device Role / Timing Role: Primary-side AC/DC conversion element in low-profile, thermally constrained enclosure.

Use Value: 4°C/W R_θJC allows direct mounting to metal housing, eliminating need for thermal pads or extra airflow.

LED Lighting Drivers

Industrial Control Power Supplies

Use Scenario: Constant-voltage LED driver for outdoor signage operating in ambient temperatures up to 70°C.

IC Role / Device Role / Timing Role: Input-stage rectifier feeding buck or flyback controller ICs with wide input range requirements.

Use Value: 150A I_FSM handles repeated cold-start surges into large electrolytic banks without degradation.

Use Scenario: DIN-rail mounted PLC power module requiring continuous operation at 60°C ambient.

IC Role / Device Role / Timing Role: Mains-fed bridge rectifier supplying isolated DC rails to microcontroller, I/O, and communication circuitry.

Use Value: UL Recognition and 150°C T_J max support extended lifetime under sustained thermal stress per IEC 61800-5-1.

Equivalent & Alternatives

The following parts are listed as comparable options for similar bridge rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
GBU406	No "-K" suffix; RoHS-compliant but not explicitly halogen-free per IEC 61249-2-21	Same electrical specs and package; suitable where halogen-free requirement is not enforced	Select GBU406-K when compliance with halogen-free standards is mandatory for final product certification
GBU806	8A rating (vs. 4A), same 800V V_RRM, larger GBU-8 package footprint	Higher current capacity supports >60W designs; requires PCB layout revision due to larger body and lead spacing	Choose GBU806 only when thermal headroom or future power scalability justifies re-layout and cost increase

Compared with GBU406-K, GBU406 offers identical performance without halogen-free assurance, while GBU806 trades pin-compatible fit for doubled current rating and non-interchangeable mechanical dimensions - making GBU406-K optimal for certified, space-constrained 4A applications.

Availability

GBU406-K is available at Aetrix Electronics and suitable for switching mode power supplies, AC/DC adapters, and LED lighting drivers requiring stable component supply, UL recognition, and halogen-free compliance.

Supply support for GBU406-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, automotive, and industrial markets since 1979.

The GBU406-K belongs to TSC's standard bridge rectifier product line, engineered for high-reliability AC/DC conversion in cost-sensitive, thermally demanding power supply applications - emphasizing safety certification, surge robustness, and environmental compliance.

FAQ

What is the peak repetitive reverse voltage rating of the GBU406-K?

The GBU406-K has a peak repetitive reverse voltage (V_RRM) rating of 800 V. This value is explicitly defined in the Absolute Maximum Ratings table for the GBU406-K variant and distinguishes it from GBU404-K (400 V), GBU405-K (600 V), and GBU407-K (1000 V). It ensures safe operation under worst-case AC line transients in 230V_AC systems.

Does the GBU406-K meet halogen-free requirements?

Yes, the GBU406-K is halogen-free in accordance with IEC 61249-2-21. This specification is stated in the FEATURES section of the official Taiwan Semiconductor datasheet (Version E2103) and confirmed in the Ordering Information note. The "-K" suffix denotes both RoHS compliance and halogen-free molding compound - a requirement for many export-oriented lighting and industrial products.

What is the forward voltage drop of the GBU406-K at rated current?

The GBU406-K exhibits a maximum forward voltage (V_F) of 1.1 V at 4 A and 25°C, per the Electrical Specifications table. This value applies per diode within the bridge; total conduction loss across the device is approximately twice this value under full-load conduction paths. The datasheet specifies this limit under pulse test conditions (PW = 0.3 ms).

Is the GBU406-K UL recognized?

Yes, the GBU406-K is UL Recognized under File #E-326243. This recognition is explicitly listed in the FEATURES section and applies to the entire GBU404-K through GBU407-K family. It certifies compliance with UL 60747-5-1 for discrete semiconductors, supporting end-equipment safety approvals without additional component-level testing.

What is the thermal resistance from junction to case for the GBU406-K?

The junction-to-case thermal resistance (R_θJC) of the GBU406-K is 4°C/W, as specified in the Thermal Performance table. This low value reflects efficient internal thermal conduction from the silicon die to the outer case surface, enabling effective heat transfer to an external heatsink or PCB copper area - critical for maintaining T_J ≤ 150°C in continuous 4A operation.

GBU406-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):: 800 V

Current - Average Rectified (Io):: 4 A

Voltage - Forward (Vf) (Max) @ If:: 1.1 V @ 4 A

Current - Reverse Leakage @ Vr:: 5 µA @ 800 V

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: GBU

GBU406-K FAQ

1.How can I place an order for GBU406-K through Aetrix?

Please submit a Request for Quotation (RFQ) for GBU406-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 GBU406-K reliable?

The price and inventory of GBU406-K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for GBU406-K is usually 5 days.

3.What payment methods are accepted for GBU406-K?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for GBU406-K transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for GBU406-K?

GBU406-K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your GBU406-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 GBU406-K?

For technical support, including GBU406-K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your GBU406-K requirements.

6.How does Aetrix verify that GBU406-K is sourced from the original manufacturer or authorized distributors?

All GBU406-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 GBU406-K meets industry standards.

7.What is the process for return or replacement of GBU406-K?

All GBU406-K units undergo pre-shipment inspection (PSI). If there is an issue with GBU406-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 GBU406-K part is unused and in its original packaging.

Return procedure for GBU406-K:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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