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Taiwan Semiconductor Corporation KBU806G
- Part No.:
- KBU806G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Bridge Rectifiers
- Package:
- 4-SIP, KBU
- Datasheet:
-
KBU806G.pdf
- Description:
- BRIDGE RECT 1PHASE 800V 8A KBU
- Quantity:
- Payment:
- Shipping:
Inventory:448
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Product details
Overview
KBU806G from Taiwan Semiconductor is a 8A, 800V repetitive peak reverse voltage (VRRM) standard bridge rectifier in KBU package, featuring glass-passivated junctions, 200A surge capability (IFSM), and UL Recognized File # E-326243 compliance; used in AC/DC front-end stages of industrial power adapters and LED drivers.
For engineers reviewing the KBU806G datasheet, KBU806G pinout, KBU806G application, or KBU806G equivalent, key selection criteria include VRRM rating, thermal resistance (RθJC = 3°C/W), forward voltage at 8A (≤1.1V), reverse leakage at 125°C (≤500µA), and KBU mechanical compatibility with PCB mounting torque ≤0.56 N·m.
Technical Context
The KBU806G integrates four silicon diodes in a single-phase full-wave bridge configuration with quad internal layout. Its glass-passivated junction ensures stable reverse characteristics up to 150°C junction temperature and low IR (<5µA at 25°C, <500µA at 125°C).
Thermally, it delivers RθJA = 18°C/W (free-air) and RθJC = 3°C/W, enabling direct heatsink mounting via case contact. The KBU package supports matte tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 1A whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 800 V - Maximum non-repetitive reverse voltage the device withstands without breakdown |
| IF(AV) | 8 A - Average forward current rating under specified thermal conditions |
| IFSM | 200 A - Peak non-repetitive surge current for 8.3 ms half-sine wave |
| RθJC | 3 °C/W - Thermal resistance from junction to case, critical for heatsink interface design |
| VF @ 8A | ≤1.1 V - Forward voltage drop per diode at rated DC current, directly impacts conduction loss |
| IR @ 125°C | ≤500 µA - Reverse leakage per diode at max operating junction temperature |
| I²t | 166 A²s - Fusing rating for short-duration overcurrent protection coordination |
Pinout & Package
Package: KBU - molded plastic case with 4 axial leads (AC1, AC2, +, –), UL 94V-0 rated, 7.2 g weight, polarity marked on body.
| 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; feeds bulk capacitor or downstream regulator |
| – | Negative DC Output / Common Return | DC return path; referenced to system ground or negative rail |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable IR <5 µA at 25°C and <500 µA at 125°C, improving reliability in high-temp environments |
| UL Recognition (E-326243) | Validates safety compliance for end-equipment certification in North America |
| Junction-to-case RθJC = 3°C/W | Allows direct thermal coupling to heatsink for sustained 8A operation without derating |
| Matte tin-plated leads | Ensures robust solder wetting and long-term intermetallic stability per J-STD-002 |
| RoHS Compliant | Meets EU Directive 2011/65/EU for lead-free manufacturing and environmental safety |
Applications
| Industrial Power Adapters | LED Driver Front-End |
|---|---|
Use Scenario: AC/DC conversion in 50–100W industrial wall adapters powering PLC I/O modules. IC Role / Device Role / Timing Role: Standard bridge rectifier converting 100–240V AC input to unregulated DC bus. Use Value: 800V VRRM provides 2× margin over 400V peak line voltage, ensuring robustness against transients. | Use Scenario: Rectification stage in constant-current LED drivers for street lighting. IC Role / Device Role / Timing Role: Full-wave bridge supplying bulk capacitor charging current to PFC controller input. Use Value: 200A IFSM handles inrush surges during cold-start, preventing fuse nuisance trips. |
| Switching Mode Power Supply (SMPS) | AC Motor Control Interface |
Use Scenario: Input rectification in 12V/24V offline SMPS for factory automation controllers. IC Role / Device Role / Timing Role: Primary-side AC-to-DC conversion feeding boost PFC stage. Use Value: RθJC = 3°C/W enables direct heatsink mounting, maintaining TJ <150°C at full 8A load. | Use Scenario: Auxiliary power supply rectification in 3-phase motor drive gate driver boards. IC Role / Device Role / Timing Role: Isolated auxiliary AC input rectifier powering isolated DC/DC for gate drivers. Use Value: UL Recognition simplifies system-level safety approval for industrial drives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bridge rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| GBU806 | VRRM = 800 V, IF = 8 A, same KBU footprint but GBU package has different lead spacing and body dimensions | Requires PCB pad revision due to GBU mechanical outline mismatch | Select when existing GBU-based designs need voltage upgrade from GBU804/805 |
| W08M | VRRM = 800 V, IF = 8 A, WOB package with lower RθJA (15°C/W) but no UL recognition | Not suitable for UL-certified end equipment without additional safety validation | Prefer for cost-sensitive, non-certified consumer lighting where thermal performance is prioritized |
Compared with GBU806 and W08M, the KBU806G offers UL recognition and KBU-specific mechanical compatibility for legacy adapter designs, while delivering identical electrical ratings-making it the default choice for certified industrial power supplies requiring proven safety and thermal interface.
Availability
KBU806G is available at Aetrix Electronics and suitable for industrial power adapters, LED driver front-ends, and switching mode power supplies requiring stable component supply, long-life reliability, and UL-compliant sourcing.
Supply support for KBU806G 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 industrial, computing, and consumer markets since 1979.
The KBU series was designed specifically for high-reliability AC/DC front-end rectification in space-constrained, thermally demanding applications-emphasizing safety certification, surge resilience, and long-term solder joint integrity.
FAQ
What is the maximum junction temperature rating for KBU806G?
The KBU806G has a maximum junction temperature (TJ MAX) of +150°C, verified per absolute maximum ratings table. This allows continuous operation in high-ambient environments such as enclosed industrial enclosures or LED driver housings, provided thermal design maintains actual junction temperature below this limit using its RθJC = 3°C/W path to heatsink.
Does KBU806G meet RoHS and lead-free requirements?
Yes, KBU806G is RoHS compliant per EU Directive 2011/65/EU and features matte tin-plated leads that satisfy J-STD-002 solderability standards. No lead or other restricted substances exceed allowable thresholds, making it suitable for environmentally regulated production programs without exemption requests.
What is the forward voltage drop of KBU806G at full rated current?
The KBU806G exhibits a maximum forward voltage (VF) of 1.1 V per diode at IF = 8 A and TJ = 25°C, measured under pulsed conditions (PW = 0.3 ms). This value directly determines conduction losses in the rectifier stage and must be factored into thermal budget calculations alongside RθJC = 3°C/W.
Is KBU806G UL recognized, and what is its file number?
Yes, KBU806G is UL Recognized under File # E-326243. This certification confirms compliance with UL 60747-4 for semiconductor devices and supports end-product safety approvals in North America, including industrial adapters and lighting systems requiring third-party safety validation.
How does the KBU806G differ from KBU805G and KBU807G?
The KBU806G differs from KBU805G (600V VRRM) and KBU807G (1000V VRRM) solely in repetitive peak reverse voltage rating-800V for KBU806G-while sharing identical IF = 8 A, IFSM = 200 A, thermal resistance, package, and pinout. All share the same KBU mechanical outline and marking format (KBU80xG).
KBU806G 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):
- 800 V
- Current - Average Rectified (Io):
- 8 A
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 8 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:
- KBU
KBU806G FAQ
1.How can I place an order for KBU806G through Aetrix?
Please submit a Request for Quotation (RFQ) for KBU806G 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 KBU806G reliable?
The price and inventory of KBU806G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KBU806G is usually 5 days.
3.What payment methods are accepted for KBU806G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KBU806G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KBU806G?
KBU806G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KBU806G 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 KBU806G?
For technical support, including KBU806G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KBU806G requirements.
6.How does Aetrix verify that KBU806G is sourced from the original manufacturer or authorized distributors?
All KBU806G 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 KBU806G meets industry standards.
7.What is the process for return or replacement of KBU806G?
All KBU806G units undergo pre-shipment inspection (PSI). If there is an issue with KBU806G, 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 KBU806G part is unused and in its original packaging.
Return procedure for KBU806G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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