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Diodes Incorporated KBJ15L08
- Part No.:
- KBJ15L08
- Manufacturer:
- Diodes Incorporated
- Category:
- Bridge Rectifiers
- Package:
- 4-SIP, KBJ
- Datasheet:
-
KBJ15L08.pdf
- Description:
- BRIDGE RECT 1PHASE 800V 15A KBJ
- Quantity:
- Payment:
- Shipping:
Inventory:5,353
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Product details
Overview
KBJ15L08 from Diodes Incorporated is a 15A, 800V glass-passivated single-phase bridge rectifier in KBJ package, featuring 0.9V max forward voltage at 7.5A and 10µA max reverse leakage at 800V/25°C, designed for high-efficiency AC-DC conversion in industrial power supplies and motor drive front-ends.
For engineers reviewing the KBJ15L08 datasheet, KBJ15L08 pinout, KBJ15L08 application, or KBJ15L08 equivalent, key selection criteria include peak repetitive reverse voltage (800V), average forward current with heatsink (15A), thermal resistance junction-to-case (1.5°C/W), low VF performance, and UL recognition for safety-critical board-level integration.
Technical Context
The KBJ15L08 integrates four silicon diodes in a single-phase full-wave bridge configuration with glass-passivated junctions for enhanced reliability under transient stress. Its 200A non-repetitive surge rating (8.3ms half-sine) supports inrush current handling in offline SMPS inputs.
Thermal design relies on direct case-to-heatsink conduction (RθJC = 1.5°C/W with 200mm × 200mm × 5mm Al plate), enabling stable 15A operation at TC = +125°C - critical for compact, convection-cooled industrial power modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 800 V - Withstands peak line voltage up to 565V RMS (e.g., 400VAC three-phase rectified input) |
| IF(AV) | 15 A @ TC = +125°C with heatsink - Sustains continuous output current in thermally constrained enclosures |
| VF Max | 0.90 V @ IF = 7.5A, TJ = +25°C - Reduces conduction loss by ~15% vs. standard 1.1V bridges at same current |
| IR Max | 10 µA @ VR = 800V, TJ = +25°C - Ensures minimal standby power loss in energy-sensitive applications |
| IFS M | 200 A (8.3ms) - Handles cold-start surges in 120/240VAC systems without degradation |
| RθJC | 1.5 °C/W - Enables precise thermal modeling when mounted to standardized aluminum heatsinks |
| Junction Cap. | 165 pF @ 4V, 1MHz - Limits high-frequency noise coupling in EMI-sensitive switch-mode inputs |
Pinout & Package
Package: KBJ - 4-terminal molded plastic housing (UL 94V-0), 4.6g mass, matte tin-plated leads solderable per MIL-STD-202 Method 208, 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 filter output |
| ~ (AC2) | AC Input Terminal 2 | Second leg of AC input; completes full-wave bridge input path |
| + (DC+) | Positive DC Output | Rectified anode-side output node; feeds bulk capacitor or PFC stage |
| – (DC–) | Negative DC Output | Rectified cathode-side return path; common reference for downstream regulation |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die construction | Prevents moisture-induced junction degradation and improves long-term reliability in humid environments |
| Low forward voltage (0.9V) | Reduces power dissipation by ≥1.5W at 7.5A vs. legacy 1.1V bridges, easing thermal management |
| UL Recognized (E95060) | Validates compliance with UL 60747-4 for end-equipment safety certification without additional component testing |
| Lead-free & Halogen-free | Meets RoHS 3 and automotive "Green" standards (<900ppm Br/Cl, <1000ppm Sb) for global supply chain compliance |
| Optimized for PCB mounting | Flat base and lead geometry support automated placement and wave soldering with minimal tombstoning risk |
Applications
| Industrial AC-DC Power Supplies | Motor Drive Front-End Rectifiers |
|---|---|
Use Scenario: 3-phase 400VAC input rectification feeding 3-level NPC inverters in servo drives. IC Role / Device Role / Timing Role: Primary uncontrolled rectifier converting AC line to stable DC bus voltage. Use Value: 800V VRRM safely accommodates line transients and regeneration spikes up to 1.2× nominal voltage. | Use Scenario: Single-phase 230VAC input in HVAC blower control modules with integrated PFC. IC Role / Device Role / Timing Role: Input-stage bridge supplying bulk capacitor for boost PFC controller IC. Use Value: 0.9V VF minimizes conduction loss before PFC stage, improving overall system efficiency by 0.8–1.2%. |
| LED Streetlight Power Supplies | Uninterruptible Power Supply (UPS) Inputs |
Use Scenario: Outdoor-rated 150W LED driver operating in ambient temperatures up to +70°C. IC Role / Device Role / Timing Role: Line-frequency rectifier preceding flyback or LLC converter stage. Use Value: 15A IF(AV) rating with heatsink enables derated operation at full load across extended temperature range. | Use Scenario: Online double-conversion UPS accepting 208/240VAC utility input with battery backup. IC Role / Device Role / Timing Role: Main AC input rectifier charging DC link capacitors during normal operation. Use Value: 200A IFSM withstands repeated generator start-up surges and grid fault recovery events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bridge rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| GBU15J (ON Semiconductor) | Same 800V VRRM, 15A IF(AV), but VF = 1.05V @ 7.5A; RθJC = 2.0°C/W | Higher conduction loss and thermal resistance reduce margin in space-constrained designs | Acceptable where thermal headroom exceeds 10°C or cost sensitivity outweighs efficiency gain |
| KBPC1508 (Comchip) | Identical 800V/15A rating, VF = 0.95V, but not UL recognized and lacks halogen-free certification | Not suitable for safety-certified end equipment requiring UL E95060 or RoHS 3 compliance | Only for cost-driven, non-certified consumer-grade applications with relaxed environmental requirements |
Compared with GBU15J and KBPC1508, the KBJ15L08 delivers lower conduction loss, superior thermal performance, and certified safety/environmental compliance - making it the preferred choice for industrial, medical, and regulated lighting applications demanding reliability and regulatory alignment.
Availability
KBJ15L08 is available at Aetrix Electronics and suitable for industrial AC-DC power supplies, motor drive front-end rectifiers, and LED streetlight power supplies requiring stable component supply, long-lifecycle assurance, and traceable sourcing.
Supply support for KBJ15L08 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, specializing in high-reliability power management, signal integrity, and protection solutions for industrial, computing, and automotive markets.
The KBJ series bridges belong to Diodes' high-current rectifier product line, engineered for robust AC-DC conversion in thermally demanding, safety-critical power systems where efficiency, longevity, and regulatory compliance are mandatory.
FAQ
What is the maximum allowable case temperature for continuous 15A operation?
The KBJ15L08 sustains 15A average forward current only when case temperature (TC) is maintained at or below +125°C, as specified in its derating curve. Operation above this temperature requires proportional current reduction - e.g., 10A at TC = +140°C - to prevent thermal runaway and ensure 10-year reliability.
Does the KBJ15L08 require forced-air cooling in typical applications?
No forced air is required if mounted to a 200mm × 200mm × 5mm aluminum heatsink, achieving RθJA = 6°C/W. In natural convection with minimal copper area, heatsinking remains essential - the device reaches thermal limit at ~3.9A without heatsink, per its derating curve.
Is the KBJ15L08 suitable for use in AEC-Q200 qualified automotive power modules?
The KBJ15L08 itself is not AEC-Q200 qualified; Diodes states that automotive-grade variants require explicit PPAP capability and IATF 16949 manufacturing - contact Diodes directly for AEC-compliant equivalents like the KBJ15L08-AQ, which undergoes additional qualification testing and change control.
How does the 165pF junction capacitance affect EMI performance in switch-mode power supplies?
At 165pF, the KBJ15L08 contributes measurable high-frequency displacement current during reverse recovery, potentially increasing common-mode noise. Layout best practices - such as minimizing loop area between bridge output and bulk capacitor, and using RC snubbers - are recommended to suppress EMI peaks above 30MHz in Class B-compliant designs.
KBJ15L08 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 4-SIP, KBJ
- Packaging:
- Bulk
- Product Status:
- Active
- Diode Type:
- Single Phase
- Technology:
- Standard
- Voltage - Peak Reverse (Max):
- 800 V
- Current - Average Rectified (Io):
- 15 A
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 7.5 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:
- KBJ
KBJ15L08 FAQ
1.How can I place an order for KBJ15L08 through Aetrix?
Please submit a Request for Quotation (RFQ) for KBJ15L08 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 KBJ15L08 reliable?
The price and inventory of KBJ15L08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KBJ15L08 is usually 5 days.
3.What payment methods are accepted for KBJ15L08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KBJ15L08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KBJ15L08?
KBJ15L08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KBJ15L08 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 KBJ15L08?
For technical support, including KBJ15L08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KBJ15L08 requirements.
6.How does Aetrix verify that KBJ15L08 is sourced from the original manufacturer or authorized distributors?
All KBJ15L08 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 KBJ15L08 meets industry standards.
7.What is the process for return or replacement of KBJ15L08?
All KBJ15L08 units undergo pre-shipment inspection (PSI). If there is an issue with KBJ15L08, 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 KBJ15L08 part is unused and in its original packaging.
Return procedure for KBJ15L08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
KBJ15L08 Tags
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HDS10M-13
Diodes Incorporated
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