My Inquiry
My Account
Taiwan Semiconductor Corporation GBU401
- Part No.:
- GBU401
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Bridge Rectifiers
- Package:
- 4-ESIP, GBU
- Datasheet:
-
GBU401.pdf
- Description:
- BRIDGE RECT 1PHASE 50V 4A GBU
- Quantity:
- Payment:
- Shipping:
Inventory:2,263
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
GBU401 from Taiwan Semiconductor is a 4A, 50V standard bridge rectifier in GBU package, featuring 1500VRMS dielectric strength, 150A surge rating (8.3ms), and AEC-Q101 qualification option. It serves as the AC-to-DC front-end in compact offline power supplies for consumer adapters and LED lighting.
For engineers reviewing the GBU401 datasheet, GBU401 pinout, GBU401 application, or GBU401 equivalent, key selection factors include its 50V repetitive peak reverse voltage, 4A average forward current, thermal resistance (RθJA = 20°C/W), and UL recognition (E-326243).
Technical Context
The GBU401 integrates four silicon diodes in a single-phase full-wave bridge configuration with common-cathode and common-anode terminals. Its quad-diode layout enables direct AC input rectification without external interconnects, supporting PCB-mount designs requiring high surge immunity and low-profile packaging.
Thermally, it delivers RθJC = 4°C/W to the case and RθJA = 20°C/W in free-air conditions, enabling operation up to 150°C junction temperature. Reverse leakage remains ≤5µA at 25°C and ≤500µA at 125°C under rated VRRM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - Maximum repetitive reverse voltage per diode; defines minimum AC input isolation rating |
| IF | 4 A - Continuous average forward current; sets maximum DC output capability in SMPS front-ends |
| IFSM (8.3ms) | 150 A - Non-repetitive surge current; determines robustness against line transients and inrush |
| VF @ 4A | 1.1 V - Forward voltage drop at full load; directly impacts conduction loss and thermal design |
| RθJA | 20 °C/W - Junction-to-ambient thermal resistance; defines required heatsinking for 4A continuous operation |
| Dielectric Strength | 1500 VRMS - Case insulation rating; satisfies reinforced isolation requirements in Class II adapters |
| UL File # | E-326243 - Certified component status for safety compliance in end-equipment approvals |
Pinout & Package
Package: GBU - molded plastic case with matte tin-plated leads, UL 94V-0 rated, 4.0g weight, polarity marked on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AC1 | AC Input Terminal 1 | One leg of AC input; connects to live/neutral side of transformer secondary or line filter |
| AC2 | AC Input Terminal 2 | Second leg of AC input; completes full-wave bridge input path |
| + (Anode Common) | Positive DC Output | Full-wave rectified positive rail; feeds bulk capacitor in offline converters |
| – (Cathode Common) | Negative DC Output | Full-wave rectified return path; referenced to system ground or negative rail |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified version available | Enables use in automotive cabin electronics where reliability and temperature cycling are critical |
| 1500VRMS dielectric strength | Meets reinforced insulation requirements for double-insulated consumer power supplies |
| 150A surge rating (8.3ms) | Withstands IEC 61000-4-5 line surges without failure in adapter and lighting applications |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and global environmental directives for PCB assembly |
| UL Recognized (E-326243) | Reduces certification effort for end products targeting North American safety standards |
Applications
| Adapter Power Supplies | LED Lighting Drivers |
|---|---|
Use Scenario: Wall-mounted AC/DC adapters for consumer electronics (e.g., routers, monitors, audio gear) operating from 90–264VAC input. IC Role / Device Role / Timing Role: Bridge rectifier converting AC mains to pulsating DC before bulk capacitance and PWM controller stage. Use Value: 4A rating supports up to ~40W output; 1500VRMS isolation ensures safety compliance without additional creepage/clearance. | Use Scenario: Constant-current LED drivers in commercial downlights and streetlight modules with universal AC input. IC Role / Device Role / Timing Role: Front-end rectification stage feeding PFC or flyback controller; handles high ambient temperatures near LEDs. Use Value: 150°C max junction temperature and 20°C/W RθJA allow operation in thermally constrained enclosures without forced cooling. |
| Industrial Control Power | Appliance Auxiliary Supplies |
Use Scenario: Low-power auxiliary supplies in PLC I/O modules and motor drives, where reliability across wide temperature ranges is essential. IC Role / Device Role / Timing Role: Isolated AC input rectification for control logic and sensor bias rails. Use Value: AEC-Q101-qualified variant (GBU401H) provides proven reliability for extended field life in harsh industrial environments. | Use Scenario: Standby and main power conversion in white goods (refrigerators, washing machines) with variable line conditions. IC Role / Device Role / Timing Role: Primary rectifier in dual-output SMPS delivering both 5V standby and 12V/24V main rails. Use Value: 150A surge rating absorbs repeated inrush currents from compressor and pump startup cycles. |
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/50V rating, but RθJA = 25°C/W; no AEC-Q101 option; UL file E157230 | Lacks automotive qualification; slightly higher thermal resistance limits power density | Preferred for cost-sensitive industrial adapters where AEC-Q101 is not required |
| KBU4A (Shindengen) | 4A/50V, RθJA = 22°C/W, 1000VRMS dielectric, UL file E117050 | Higher dielectric rating allows tighter PCB spacing; no AEC-Q101 variant available | Selected when enhanced isolation margin or legacy footprint compatibility is prioritized over automotive qualification |
Compared with GBU401, GBU4K offers lower cost but reduced thermal performance and no automotive qualification, while KBU4A provides superior isolation margin but lacks AEC-Q101 support-making GBU401 the optimal choice for automotive-adjacent or safety-critical adapter designs requiring both robust surge handling and qualification traceability.
Availability
GBU401 is available at Aetrix Electronics and suitable for adapter power supplies, LED lighting drivers, and industrial control power systems requiring stable component supply, long-term lifecycle assurance, 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
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 GBU series was designed specifically for high-reliability, high-surge AC/DC front-end rectification in space-constrained offline power supplies-emphasizing thermal efficiency, safety certification readiness, and automotive-grade variants.
FAQ
What is the maximum junction temperature specification for GBU401?
The GBU401 has a maximum junction temperature (TJ) of +150°C, verified per absolute maximum ratings. This allows reliable operation in high-ambient environments such as enclosed LED drivers or industrial control cabinets. Derating curves confirm usable current capacity down to 0A at 150°C ambient when mounted on standard FR-4 PCBs without heatsinking. The GBU401 maintains specified electrical performance within this range.
Does GBU401 support automotive applications?
Yes-the GBU401H variant is AEC-Q101 qualified and explicitly listed in TSC's documentation for automotive cabin electronics. While the base GBU401 is not qualified, its thermal and surge specifications (150A IFSM, 150°C TJ) align with automotive auxiliary supply requirements. For production automotive use, only GBU401H should be selected to meet qualification mandates.
What is the forward voltage drop of GBU401 at rated current?
The GBU401 exhibits a maximum forward voltage drop (VF) of 1.1 V at 4A and 25°C junction temperature, per electrical specifications. At 2A, VF is ≤1.0 V. These values are measured under pulsed conditions (0.3ms PW) and define conduction losses that directly impact thermal design and efficiency in 40W-class power supplies.
How is polarity marked on the GBU401 package?
The GBU401 uses standardized bridge rectifier polarity marking: the cathode common terminal (–) is indicated by a white band or "+" symbol adjacent to the positive (+) terminal on the top surface of the GBU package. The AC1 and AC2 terminals are unmarked but positioned symmetrically opposite the DC output pins. Polarity follows industry-standard GBU outline diagrams in TSC's datasheet revision M2103.
What packaging options are available for GBU401?
The GBU401 is supplied in tube packaging with 20 units per tube, as specified in the ordering information. No tape-and-reel or bulk options are documented for this part number. The GBU401H (AEC-Q101 qualified version) shares identical packaging. Tube format supports manual and semi-automated PCB assembly processes typical for medium-volume power supply manufacturing.
GBU401 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):
- 50 V
- Current - Average Rectified (Io):
- 4 A
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 4 A
- Current - Reverse Leakage @ Vr:
- 5 µA @ 50 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
-
HDS10M-13
Diodes Incorporated
-
CD-MBL106S
Bourns Inc.
-
MB10S-13
Diodes Incorporated
-
CD-MBL206SL
Bourns Inc.
-
MB4S-TP
Micro Commercial Co
-
MB6S-TP
Micro Commercial Co
-
CD-MBL210S
Bourns Inc.
-
BAS3007ARPPE6327HTSA1
Infineon Technologies
-
DF02M
Diodes Incorporated
-
CD-MBL210SL
Bourns Inc.
-
DF04M
Diodes Incorporated
-
DF01M
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
