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Diodes Incorporated KBJ604G
- Part No.:
- KBJ604G
- Manufacturer:
- Diodes Incorporated
- Category:
- Bridge Rectifiers
- Package:
- 4-SIP, KBJ
- Datasheet:
-
KBJ604G.pdf
- Description:
- BRIDGE RECT 1PHASE 400V 6A KBJ
- Quantity:
- Payment:
- Shipping:
Inventory:4,519
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Product details
Overview
KBJ604G from Diodes Incorporated is a 6.0A standard recovery bridge rectifier in KBJ package, rated for 400V peak repetitive reverse voltage (VRRM), 1.0V forward voltage at 3A, and 5.0µA reverse leakage at 25°C. It delivers 170A non-repetitive surge current capability and is designed for AC/DC front-end conversion in industrial power supplies and motor control circuits.
For engineers reviewing the KBJ604G datasheet, KBJ604G pinout, KBJ604G application, or KBJ604G equivalent, key selection criteria include VRRM derating for capacitive loads, thermal resistance (1.5°C/W junction-to-case), mounting torque limit (5.0 in-lbs), and UL recognition (E95060) for safety-critical board-level designs.
Technical Context
This single-phase, full-wave bridge rectifier integrates four silicon diodes in a common cathode/anode configuration with glass-passivated die construction. Its 400V VRRM rating supports 280V RMS input operation, and it is specified for 6.0A average output current at TC = +110°C with 20% derating required for capacitive loads.
The device exhibits 80pF typical total capacitance per element at 1MHz/4V reverse bias and maintains 500µA max reverse leakage at +125°C. Its 120A²s I²t fusing rating enables robust short-circuit withstand under 8.3ms half-sine surges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - Maximum peak reverse voltage before breakdown; defines safe AC input range for 280V RMS systems. |
| IO | 6.0 A - Average rectified output current at TC = +110°C; requires heatsinking above ambient derating thresholds. |
| VF @ 3A | 1.0 V - Forward voltage drop per diode element; determines conduction loss (3W total at 3A full-wave). |
| IR @ 25°C | 5.0 µA - Reverse leakage current at rated DC blocking voltage; ensures low standby power loss. |
| IFSM | 170 A - Non-repetitive surge current for 8.3ms half-sine; supports inrush current handling in transformer-fed supplies. |
| RθJC | 1.5 °C/W - Junction-to-case thermal resistance; mandates mechanical mounting to aluminum heatsink (75×75×1.6mm) for thermal management. |
Pinout & Package
Package: KBJ molded plastic case (UL 94V-0), through-hole mountable with #6 screw, 4.3g weight, bright tin-plated leads solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ~ (AC1) | AC Input Terminal 1 | One of two AC input nodes; connects to secondary winding or line input in full-wave bridge configuration. |
| ~ (AC2) | AC Input Terminal 2 | Second AC input node; polarity-insensitive for standard bridge operation. |
| + (DC+) | Positive DC Output | Full-wave rectified positive output; ties to bulk capacitor anode or downstream regulator input. |
| – (DC–) | Negative DC Output / Common Return | Full-wave rectified negative output; serves as system ground reference or return path for load current. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated die | Enhances long-term reliability and moisture resistance in humid or contaminated environments. |
| 2500VRMS dielectric strength | Ensures isolation integrity between AC inputs and DC outputs under high-voltage transients. |
| UL Recognized Component (E95060) | Validates compliance with safety standards for end-equipment certification in North America. |
| Lead-free & RoHS compliant | Meets EU Directive 2015/863/EU requirements; eliminates hazardous substances in PCB assembly. |
Applications
| Industrial Power Supply | Motor Drive Front-End |
|---|---|
Use Scenario: AC/DC conversion stage in 30–100W industrial switch-mode power supplies with universal input (85–265VAC). IC Role / Device Role / Timing Role: Full-wave bridge rectifier converting mains AC to pulsating DC prior to bulk capacitor filtering. Use Value: 6.0A IO rating and 170A IFSM support sustained load current and startup inrush without thermal runaway. | Use Scenario: Rectification of transformer-isolated AC supply feeding H-bridge gate drivers in 3-phase BLDC motor controllers. IC Role / Device Role / Timing Role: Isolated DC bus generation with low VF and stable IR across temperature for consistent driver biasing. Use Value: 1.0V VF at 3A minimizes conduction loss in compact enclosed enclosures where airflow is limited. |
| LED Driver Input Stage | Appliance Control Board |
Use Scenario: Input rectification in constant-current LED drivers for commercial lighting fixtures operating from 230VAC mains. IC Role / Device Role / Timing Role: Primary-side AC-to-DC conversion feeding buck or flyback controller ICs. Use Value: 400V VRRM provides 20% margin over 230VAC peak (325V), ensuring reliable operation during line surges. | Use Scenario: Embedded power conversion on white-goods control boards (e.g., washing machine mainboard) with 115/230VAC input. IC Role / Device Role / Timing Role: General-purpose bridge rectifier supplying logic and relay power rails after fuse and EMI filter. Use Value: UL E95060 recognition simplifies end-product safety certification and reduces test overhead. |
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 400V VRRM, 4A IO rating; smaller GBU package with higher RθJC (2.5°C/W). | Limited to lower continuous current; requires larger heatsink area for 6A operation. | Select when footprint space is constrained and average load current remains ≤4A. |
| KBPC604 (Shindengen) | Identical 400V/6A rating, but KBPC package has higher mounting torque tolerance (7.0 in-lbs vs. 5.0). | Better mechanical retention in high-vibration environments (e.g., HVAC blowers). | Prefer for automotive-adjacent or industrial equipment subject to mechanical shock. |
Compared with GBU4K and KBPC604, KBJ604G offers optimal balance of current rating, thermal performance (1.5°C/W), and UL safety recognition-making it preferred for certified industrial power supplies where both thermal headroom and regulatory compliance are critical.
Availability
KBJ604G is available at Aetrix Electronics and suitable for industrial power supplies, motor drive front-ends, and appliance control boards requiring stable component supply and long-term manufacturability.
Supply support for KBJ604G 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 across Asia, Europe, and North America.
The KBJ series belongs to Diodes' standard recovery bridge rectifier product line, engineered for cost-effective, high-reliability AC/DC conversion in general-purpose industrial and consumer power applications.
FAQ
What is the maximum recommended mounting torque for KBJ604G?
The KBJ604G datasheet specifies a maximum mounting torque of 5.0 in-lbs when securing the device via #6 screw. Exceeding this value risks cracking the molded plastic package or damaging internal wire bonds, potentially causing premature failure or increased thermal resistance due to poor case-to-heatsink contact.
Does KBJ604G require derating for capacitive-load applications?
Yes-Diodes specifies a 20% current derating for capacitive loads. At TC = +110°C, the 6.0A IO rating must be reduced to 4.8A to prevent overheating caused by high peak charging currents into bulk electrolytic capacitors, which increase RMS current stress beyond resistive or inductive load conditions.
Is KBJ604G qualified for automotive use under AEC-Q101?
No-KBJ604G is not AEC-Q101 qualified. The datasheet explicitly states that automotive-grade variants require specific change control, PPAP capability, and IATF 16949 manufacturing; standard KBJ604G is intended for industrial and commercial applications only.
What is the thermal resistance from junction to case (RθJC) for KBJ604G?
KBJ604G has a typical RθJC of 1.5°C/W per element, measured with the device mounted on a 75mm × 75mm × 1.6mm aluminum plate heatsink. This value assumes proper mechanical clamping and thermal interface material; actual system RθJA will depend on board layout, airflow, and heatsink design.
KBJ604G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 4-SIP, KBJ
- Packaging:
- Tube
- Product Status:
- Active
- Diode Type:
- Single Phase
- Technology:
- Standard
- Voltage - Peak Reverse (Max):
- 400 V
- Current - Average Rectified (Io):
- 6 A
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 3 A
- Current - Reverse Leakage @ Vr:
- 5 µA @ 400 V
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- KBJ
KBJ604G FAQ
1.How can I place an order for KBJ604G through Aetrix?
Please submit a Request for Quotation (RFQ) for KBJ604G 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 KBJ604G reliable?
The price and inventory of KBJ604G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KBJ604G is usually 5 days.
3.What payment methods are accepted for KBJ604G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KBJ604G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KBJ604G?
KBJ604G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KBJ604G 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 KBJ604G?
For technical support, including KBJ604G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KBJ604G requirements.
6.How does Aetrix verify that KBJ604G is sourced from the original manufacturer or authorized distributors?
All KBJ604G 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 KBJ604G meets industry standards.
7.What is the process for return or replacement of KBJ604G?
All KBJ604G units undergo pre-shipment inspection (PSI). If there is an issue with KBJ604G, 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 KBJ604G part is unused and in its original packaging.
Return procedure for KBJ604G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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