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Taiwan Semiconductor Corporation KBU601G
- Part No.:
- KBU601G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Bridge Rectifiers
- Package:
- 4-SIP, KBU
- Datasheet:
-
KBU601G.pdf
- Description:
- BRIDGE RECT 1PHASE 50V 6A KBU
- Quantity:
- Payment:
- Shipping:
Inventory:9,557
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Product details
Overview
KBU601G from Taiwan Semiconductor is a 6A, 50V standard single-phase bridge rectifier in KBU package, featuring glass-passivated junctions, <1.1V forward voltage at 6A, <5µA reverse current at 25°C, and 175A surge capability - used in AC/DC front-end stages of compact switching power supplies.
For engineers reviewing the KBU601G datasheet, KBU601G pinout, KBU601G application, or KBU601G equivalent, key selection criteria include repetitive peak reverse voltage (50V), thermal resistance (RθJA = 8.6°C/W), junction temperature range (–55°C to +150°C), and UL recognition (E-326243).
Technical Context
The KBU601G integrates four silicon diodes in a single-phase full-wave bridge configuration with common-cathode and common-anode terminals. Its glass-passivated chip junction ensures stable leakage performance (<5 µA @ 25°C) and high reliability under thermal cycling.
Designed for PCB mounting with matte tin-plated leads compliant to J-STD-002, it delivers 6A average forward current with 175A non-repetitive surge rating (8.3 ms half-sine) and meets UL 94V-0 flammability requirements in its KBU molded case.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - maximum repetitive reverse voltage the device blocks without breakdown |
| IF | 6 A - continuous average forward current rating at TA = 25°C with adequate heatsinking |
| IFSM | 175 A - peak non-repetitive surge current handling for 8.3 ms half-sine waveform |
| VF @ 6A | ≤1.1 V - forward voltage drop per diode path at full rated current, directly impacting conduction loss |
| IR @ 25°C | ≤5 µA - reverse leakage per diode at rated VRRM, critical for low-power standby efficiency |
| RθJA | 8.6 °C/W - junction-to-ambient thermal resistance, defining required PCB copper area or heatsink size |
| TJ max | +150 °C - maximum allowable junction temperature, limiting operating ambient or power derating |
Pinout & Package
Package: KBU - molded plastic case with 4 axial leads (AC1, AC2, +, –), UL 94V-0 rated, 7.2 g weight, designed for through-hole PCB mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AC1 | AC input terminal 1 | One leg of AC input; connects to transformer secondary or line input |
| AC2 | AC input terminal 2 | Second leg of AC input; completes full-wave bridge input path |
| + | Positive DC output | Full-wave rectified positive output node; connects to bulk capacitor or regulator input |
| – | Negative DC output / common return | Full-wave rectified negative output node; serves as system ground reference |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables <5 µA reverse leakage at 25°C and stable performance across humidity/temperature stress |
| UL Recognized (E-326243) | Validates safety compliance for end-equipment certification in commercial power supplies |
| JESD 201 Class 1A whisker resistance | Prevents tin whisker growth on matte tin leads, ensuring long-term solder joint integrity |
| 175A surge rating (8.3 ms) | Withstands inrush currents during cold-start of SMPS without degradation or failure |
| RθJC = 3.1 °C/W | Supports efficient heat transfer to heatsink or metal-core PCB when mounted with proper torque (≤0.56 N·m) |
Applications
| LED Driver Power Stage | USB Wall Adapter Input Rectification |
|---|---|
Use Scenario: Converts 120/230 VAC mains to DC for constant-current LED driver ICs in commercial lighting fixtures. IC Role / Device Role / Timing Role: Primary AC/DC conversion element; provides isolated, ripple-filtered DC bus upstream of PFC and DC/DC stages. Use Value: Low VF (≤1.1 V) minimizes conduction loss at 6A, improving overall driver efficiency and thermal margin. | Use Scenario: Rectifies AC input in compact 5–20 W USB charging adapters with universal input (90–264 VAC). IC Role / Device Role / Timing Role: Front-end bridge rectifier feeding bulk capacitor and primary-side controller in flyback topology. Use Value: 50 V VRRM is sufficient for low-voltage output designs where peak inverse voltage remains below 40 V after damping/clamping. |
| Industrial Control Power Supply | Appliance Auxiliary Power Module |
Use Scenario: Supplies 12–24 VDC auxiliary power for PLC I/O modules, sensors, and communication interfaces. IC Role / Device Role / Timing Role: Mains-connected rectifier in unregulated linear or buck-derived auxiliary supply. Use Value: UL recognition and –55°C to +150°C operating range ensure reliability in wide-temperature industrial enclosures. | Use Scenario: Powers control logic and display subsystems in refrigerators, washing machines, and HVAC controllers. IC Role / Device Role / Timing Role: Isolated AC/DC converter input stage delivering low-noise DC to microcontroller and interface ICs. Use Value: Glass passivation and <0.1 µA typical IR reduce standby power consumption and improve long-term stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bridge rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| GBU6K | Same 6A/50V rating, GBU package (larger footprint, higher RθJA = 12°C/W) | Requires more PCB area; less thermally efficient in space-constrained designs | Choose GBU6K only if existing layout accommodates larger GBU outline and thermal budget allows |
| W04G | Lower current rating (4A), same KBU package and 50V VRRM; higher VF (1.2 V typ. @ 4A) | Suitable only for sub-4A loads; not recommended for sustained 6A operation | Select W04G only for cost-sensitive, lower-power applications where derating to ≤3.2A is acceptable |
Compared with GBU6K and W04G, the KBU601G offers optimal balance of thermal performance (RθJA = 8.6°C/W), compact KBU footprint, and verified 6A continuous capability - making it preferred for new 5–15 W SMPS designs requiring reliability and board-area efficiency.
Availability
KBU601G is available at Aetrix Electronics and suitable for switching mode power supplies, USB wall adapters, and industrial control power modules requiring stable component supply and UL-recognized rectification.
Supply support for KBU601G 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 and protection markets since 1979.
The KBU601G belongs to TSC's standard bridge rectifier product line, engineered for high-volume, cost-sensitive AC/DC conversion in consumer, industrial, and lighting applications where reliability, safety certification, and thermal robustness are essential.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) for KBU601G?
The KBU601G has a maximum repetitive peak reverse voltage (VRRM) of 50 V. This rating defines the highest reverse voltage the device can block continuously without breakdown under normal operating conditions. It is specifically assigned to the KBU601G variant within the KBU601G–KBU607G family, where "01" denotes the 50 V grade. Exceeding this voltage risks irreversible avalanche failure.
Does KBU601G meet RoHS and UL safety requirements?
Yes, the KBU601G is RoHS compliant and UL Recognized under File # E-326243. Its molding compound meets UL 94V-0 flammability rating, and its matte tin-plated leads comply with J-STD-002 solderability and JESD 201 Class 1A whisker resistance standards. These certifications are confirmed in Taiwan Semiconductor's official documentation for the KBU601G–KBU607G series.
What is the forward voltage drop (VF) of KBU601G at full rated current?
At 6 A forward current and junction temperature of 25°C, the KBU601G exhibits a maximum forward voltage drop of 1.1 V per diode path. This value is specified in the Electrical Specifications table and directly impacts conduction losses in the rectifier stage. Pulse testing conditions (PW = 0.3 ms) apply per the datasheet note.
Can KBU601G replace KBU602G in a 100 V circuit?
No, KBU601G must not replace KBU602G in a 100 V circuit. The KBU601G is rated for 50 V VRRM, while KBU602G is rated for 100 V. Using KBU601G in a 100 V application risks reverse-biased breakdown, catastrophic failure, and potential safety hazards. Always match the VRRM rating to the circuit's peak inverse voltage requirement.
What is the thermal resistance from junction to ambient (RθJA) for KBU601G?
The junction-to-ambient thermal resistance (RθJA) for KBU601G is 8.6 °C/W under standard test conditions (free-air, no heatsink). This value assumes the device is mounted on a PCB with minimum copper area per JEDEC standards. Actual RθJA will improve with added copper pour or external heatsinking, and must be considered during thermal design of the KBU601G application.
KBU601G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- 4-SIP, KBU
- Packaging:
- Tray
- Product Status:
- Active
- Diode Type:
- Single Phase
- Technology:
- Standard
- Voltage - Peak Reverse (Max):
- 50 V
- Current - Average Rectified (Io):
- 6 A
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 6 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:
- KBU
KBU601G FAQ
1.How can I place an order for KBU601G through Aetrix?
Please submit a Request for Quotation (RFQ) for KBU601G 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 KBU601G reliable?
The price and inventory of KBU601G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KBU601G is usually 5 days.
3.What payment methods are accepted for KBU601G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KBU601G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KBU601G?
KBU601G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KBU601G 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 KBU601G?
For technical support, including KBU601G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KBU601G requirements.
6.How does Aetrix verify that KBU601G is sourced from the original manufacturer or authorized distributors?
All KBU601G 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 KBU601G meets industry standards.
7.What is the process for return or replacement of KBU601G?
All KBU601G units undergo pre-shipment inspection (PSI). If there is an issue with KBU601G, 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 KBU601G part is unused and in its original packaging.
Return procedure for KBU601G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
KBU601G Tags
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