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Diodes Incorporated KBJL408-TU
- Part No.:
- KBJL408-TU
- Manufacturer:
- Diodes Incorporated
- Category:
- Bridge Rectifiers
- Package:
- 4-SIP, KBJL
- Datasheet:
-
KBJL408-TU.pdf
- Description:
- BRIDGE RECT 1PHASE 800V 4A KBJL
- Quantity:
- Payment:
- Shipping:
Inventory:8,650
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Product details
Overview
KBJL408-TU from Diodes Incorporated is a 4A standard recovery bridge rectifier with 800V maximum repetitive peak reverse voltage (VRRM), 1.0V max forward voltage at 2A, and 10µA max reverse leakage current at 25°C. It features glass-passivated die construction, molded green plastic package (UL 94V-0), and is optimized for AC/DC power conversion in compact board-level power supplies.
For engineers reviewing the KBJL408-TU datasheet, KBJL408-TU pinout, KBJL408-TU application, or KBJL408-TU equivalent, this device serves as a drop-in replacement in TV, game console, and PC power supply designs where 4A average output current, 800V blocking capability, and thermal robustness without heatsink are required.
Technical Context
The KBJL408-TU integrates four standard-recovery silicon diodes in a single-phase full-wave bridge configuration, enabling efficient AC-to-DC conversion without external interconnects. Its glass-passivated junction ensures stable reverse characteristics across temperature and long-term reliability under surge stress.
Thermal performance is defined by RθJA = 24°C/W (no heatsink) and RθJA = 11°C/W (with 35mm × 35mm × 1.7mm Cu heatsink), supporting operation from –55°C to +150°C junction temperature. Peak surge capability reaches 120A (8.3ms half-sine) at 25°C, critical for inrush handling in offline SMPS front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 800 V - Sustains 800V reverse voltage during AC line peaks in 115/230VAC inputs. |
| IF(AV) | 4 A - Delivers continuous 4A DC output current with heatsink at TC = 125°C. |
| VF Max | 1.0 V @ 2A - Limits conduction loss to ≤2W per half-cycle in full-wave rectification. |
| IR Max | 10 µA @ 25°C - Ensures minimal standby power loss in low-power standby circuits. |
| IFSM | 120 A (8.3ms) - Withstands typical AC line surge events without failure. |
| TJ Range | –55°C to +150°C - Supports operation in automotive cabin and industrial ambient environments. |
| CT | 40 pF @ 1MHz, 4V - Minimizes high-frequency noise coupling in switching power supplies. |
Pinout & Package
Package: KBJL - Molded plastic case with matte tin-plated leads (Solderable per MIL-STD-202, Method 208), UL 94V-0 rated, weight ≈2.4 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ~AC1 | AC Input Terminal 1 | One leg of AC input; connects to transformer secondary or EMI filter output. |
| ~AC2 | AC Input Terminal 2 | Second leg of AC input; completes full-wave bridge input path. |
| +DC | Positive DC Output | Full-wave rectified positive output node; feeds bulk capacitor or PFC stage. |
| –DC | Negative DC Output / Common Return | Reference return path for DC output; ties to system ground or negative rail. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivation | Stabilizes reverse leakage and breakdown behavior over temperature and lifetime. |
| High surge current rating | 120A non-repetitive surge (8.3ms) enables reliable startup in unregulated AC/DC supplies. |
| Green molding compound | Halogen- and antimony-free formulation (<900ppm Br/Cl, <1000ppm Sb) meets environmental compliance mandates. |
| UL Recognized Component | File E95060 certification confirms safety compliance for end-equipment approvals. |
| Lead-free & RoHS 3 compliant | Fully compliant with EU Directive 2015/863/EU; suitable for global commercial and industrial markets. |
Applications
| TV Power Supply | Game Console Power |
|---|---|
Use Scenario: Primary-side rectification in 115/230VAC-fed switch-mode power supplies for flat-panel TVs. IC Role / Device Role / Timing Role: Full-wave bridge rectifier converting AC line to pulsating DC for bulk capacitor charging. Use Value: 800V VRRM safely handles 230VAC line surges; 4A IF(AV) supports >65W output power with margin. | Use Scenario: Off-line AC/DC conversion in gaming console auxiliary and main power rails. IC Role / Device Role / Timing Role: Input-stage rectifier delivering unregulated DC to downstream buck or flyback controllers. Use Value: High IFSM withstands repeated cold-start inrush; green package satisfies regional eco-regulations. |
| PC ATX Power Supply | Industrial AC/DC Adapter |
Use Scenario: Rectification in ATX PSUs for +3.3V/+5V/+12V rail generation. IC Role / Device Role / Timing Role: Bulk rectifier feeding primary-side PFC or PWM controller input. Use Value: Low VF (1.0V) reduces conduction loss; UL recognition simplifies end-product safety certification. | Use Scenario: General-purpose AC/DC adapter for industrial control modules and sensors. IC Role / Device Role / Timing Role: Input bridge in isolated offline converters operating in harsh ambient conditions. Use Value: –55°C to +150°C TJ range ensures reliability in factory-floor enclosures without forced cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bridge rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| GBU8K | Same 800V VRRM, 8A IF(AV), larger GBU package (RθJA = 18°C/W w/ heatsink). | Higher current capacity suits >100W designs; requires more PCB area and thermal management. | Select when higher average current or better thermal margin is needed; not pin-compatible. |
| KBU8B | 800V VRRM, 8A IF(AV), KBU package (RθJA = 20°C/W w/ heatsink), same lead finish. | Higher surge rating (200A) and current rating support heavier-duty industrial use cases. | Choose for legacy KBU footprint compatibility and enhanced surge resilience in ruggedized systems. |
Compared with KBJL408-TU, GBU8K offers higher current but larger size and different mounting, while KBU8B provides identical voltage rating with double the current and superior surge tolerance-both require layout revision but deliver measurable thermal and reliability headroom in demanding deployments.
Availability
KBJL408-TU is available at Aetrix Electronics and suitable for TV power, game console power, and PC power supply designs requiring stable component supply, RoHS-compliant sourcing, and UL-recognized safety certification.
Supply support for KBJL408-TU 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations worldwide.
The KBJL series belongs to Diodes' standard-recovery bridge rectifier product line, engineered for cost-effective, high-reliability AC/DC front-end conversion in consumer and industrial power supplies.
FAQ
What is the maximum operating temperature for KBJL408-TU?
The KBJL408-TU has a specified junction temperature range of –55°C to +150°C. Its thermal resistance is 24°C/W (no heatsink) and 11°C/W (with 35mm × 35mm × 1.7mm copper heatsink). Derating curves confirm 4A average current is sustainable only with heatsink at TC = 125°C; without heatsink, maximum IF(AV) drops to 2.7A at the same case temperature.
Is KBJL408-TU suitable for automotive applications?
KBJL408-TU is not AEC-Q200 qualified and lacks PPAP documentation or IATF 16949-certified manufacturing evidence in its public datasheet. While it operates across –55°C to +150°C, Diodes explicitly states that automotive-grade variants require direct engagement with their representatives for change-controlled, qualified parts-this part is intended for commercial/industrial use only.
How does the KBJL408-TU compare to KBJL406-TU and KBJL410-TU?
KBJL408-TU differs solely in maximum repetitive peak reverse voltage: 800V versus 600V (KBJL406-TU) and 1000V (KBJL410-TU). All share identical IF(AV) = 4A, VF = 1.0V @ 2A, IR = 10µA @ 25°C, package (KBJL), and thermal specs. Selection depends strictly on required blocking voltage margin for the AC line input and transient conditions.
What does the "-TU" suffix indicate in KBJL408-TU?
The "-TU" suffix denotes tube packaging: 20 pieces per plastic tube. This is Diodes Incorporated's standard carrier format for KBJL-series bridge rectifiers, distinct from tape-and-reel ("-T" or "-TR") or bulk ("-BULK") options. Tube packaging supports manual assembly and low-volume prototyping with easy handling and static-safe storage.
KBJL408-TU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 4-SIP, KBJL
- 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 V @ 2 A
- Current - Reverse Leakage @ Vr:
- 10 µA @ 800 V
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- KBJL
KBJL408-TU FAQ
1.How can I place an order for KBJL408-TU through Aetrix?
Please submit a Request for Quotation (RFQ) for KBJL408-TU 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 KBJL408-TU reliable?
The price and inventory of KBJL408-TU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KBJL408-TU is usually 5 days.
3.What payment methods are accepted for KBJL408-TU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KBJL408-TU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KBJL408-TU?
KBJL408-TU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KBJL408-TU 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 KBJL408-TU?
For technical support, including KBJL408-TU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KBJL408-TU requirements.
6.How does Aetrix verify that KBJL408-TU is sourced from the original manufacturer or authorized distributors?
All KBJL408-TU 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 KBJL408-TU meets industry standards.
7.What is the process for return or replacement of KBJL408-TU?
All KBJL408-TU units undergo pre-shipment inspection (PSI). If there is an issue with KBJL408-TU, 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 KBJL408-TU part is unused and in its original packaging.
Return procedure for KBJL408-TU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
KBJL408-TU Tags
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