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Diodes Incorporated KBJ3506
- Part No.:
- KBJ3506
- Manufacturer:
- Diodes Incorporated
- Category:
- Bridge Rectifiers
- Package:
- 4-SIP, KBJ
- Datasheet:
-
KBJ3506.pdf
- Description:
- BRIDGE RECT 1PHASE 600V 35A KBJ
- Quantity:
- Payment:
- Shipping:
Inventory:5,922
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Product details
Overview
KBJ3506 from Diodes Incorporated is a 35A standard recovery bridge rectifier in KBJ package, rated for 600V repetitive peak reverse voltage, 1.05V max forward voltage at 17.5A, and 10µA max leakage current at 25°C. It features glass-passivated die construction, RoHS-compliant matte tin-plated leads, and is designed for high-reliability AC/DC power conversion in TV, PC, and game console power supplies.
For engineers reviewing the KBJ3506 datasheet, KBJ3506 pinout, KBJ3506 application, or KBJ3506 equivalent, this device supports high-current, medium-voltage rectification with verified thermal resistance (RθJA = 28°C/W without heatsink), IFSM = 380A surge rating, and AEC-Q200-ready manufacturing capability for automotive-adjacent power systems.
Technical Context
This single-phase full-wave bridge rectifier integrates four silicon diodes in a monolithic KBJ molded plastic package with four external terminals (AC1, AC2, +, –). Its standard recovery characteristic (trr not specified but implied by "standard recovery" classification) targets line-frequency (50/60Hz) applications where fast switching is unnecessary and cost-effective thermal performance is prioritized.
The device operates across –55°C to +150°C junction temperature, delivers 35A average forward current with heatsink at TC = +95°C, and exhibits 165pF typical junction capacitance at 1MHz/4V reverse bias - confirming suitability for low-noise, non-switching rectification rather than high-frequency PFC stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 600 V - Maximum repetitive reverse voltage the bridge withstands without breakdown during AC line peaks. |
| IF(AV) | 35 A - Average DC output current deliverable with heatsink at case temperature ≤95°C. |
| VF Max | 1.05 V @ 17.5A - Forward voltage drop per half-bridge path, defining conduction loss at rated half-load. |
| IR Max | 10 µA @ 25°C - Reverse leakage current per diode leg, critical for standby power integrity in offline SMPS inputs. |
| IFSM | 380 A - Non-repetitive surge current handling for 8.3ms half-sine, enabling robust inrush tolerance. |
| RθJA | 28 °C/W - Junction-to-ambient thermal resistance without heatsink, setting PCB copper area requirements. |
| TJ Range | –55°C to +150°C - Operational junction temperature window supporting industrial and extended-temperature environments. |
Pinout & Package
Package: KBJ - 4-terminal molded plastic housing (approx. 4.6g), UL 94V-0 rated, lead-free and halogen-free "Green" compound. Terminals: Matte tin-plated, solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AC1 | AC Input Terminal 1 | One of two alternating current input nodes; connects to live/neutral side of transformer secondary or AC line. |
| AC2 | AC Input Terminal 2 | Second AC input node; completes full-wave bridge input path with AC1. |
| + | Positive DC Output | Anode of output diode pair; delivers rectified positive DC voltage to bulk capacitor or regulator input. |
| – | Negative DC Output / Common Return | Cathode of output diode pair; serves as DC ground reference and return path for load current. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die | Enhances long-term reliability and moisture resistance under thermal cycling in humid environments. |
| UL Recognized (E95060) | Validates safety compliance for end-equipment certification in North America and globally. |
| RoHS 3 & "Green" compliant | Meets EU 2015/863/EU with Br+Cl <1500ppm and Sb <1000ppm - required for eco-design directives. |
| High surge rating (380A) | Withstands repeated cold-start inrush events in consumer power supplies without degradation. |
| Low RθJC (1°C/W) | Enables efficient heat transfer to heatsink or metal-core PCB, supporting compact thermal design. |
Applications
| TV Power Supply | PC ATX Power Supply |
|---|---|
Use Scenario: Primary-side AC/DC rectification in 100–300W off-line switch-mode power supplies for LCD/LED TVs. IC Role / Device Role / Timing Role: Full-wave bridge rectifier converting 100–240V AC mains to unregulated DC bus (~140–340V). Use Value: 35A rating and 600V VRRM ensure margin over 264VAC peak (373V), while 1.05V VF minimizes conduction loss at 15–25A typical load. | Use Scenario: Bulk rectification stage in ATX main +12V/+5V/+3.3V power distribution. IC Role / Device Role / Timing Role: High-current bridge delivering DC input to PFC controller and primary-side MOSFETs. Use Value: 380A IFSM handles transformer inrush and transient surges; RθJA = 28°C/W allows direct mounting on chassis or minimal heatsinking. |
| Game Console Power Adapter | Industrial AC-DC Module |
Use Scenario: Compact external power adapter for gaming consoles requiring 12–24V/5–10A DC output. IC Role / Device Role / Timing Role: Input rectifier feeding flyback or resonant converter operating at 50/60Hz line frequency. Use Value: KBJ package enables automated PCB assembly; glass passivation ensures reliability under variable ambient humidity and thermal stress. | Use Scenario: DIN-rail mounted AC-DC power module for PLC I/O or sensor interface power rails. IC Role / Device Role / Timing Role: Robust front-end rectifier in wide-input (85–305VAC) industrial power supplies. Use Value: –55°C to +150°C TJ range supports operation in uncontrolled enclosures; UL recognition simplifies system-level safety approval. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bridge rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| GBU15K | Same KBU/KBJ footprint, 15A rating, 1000V VRRM, VF = 1.1V @ 7.5A. | Lower current capacity limits use to ≤15A average loads; higher VRRM suits 305VAC industrial inputs. | Select when lower cost and higher voltage margin outweigh current requirement. |
| KBPC3510 | Round-body KBPC package, 35A/1000V, VF = 1.1V @ 17.5A, RθJA = 30°C/W. | Requires different PCB footprint and mounting; slightly higher VF and thermal resistance reduce efficiency vs. KBJ3506. | Choose only if legacy KBPC layout compatibility is mandatory and 1000V rating is essential. |
Compared with GBU15K and KBPC3510, KBJ3506 provides optimal balance of 35A current delivery, 600V rating for universal-input consumer designs, lowest VF (1.05V), and best thermal resistance (RθJA = 28°C/W), making it preferred for space-constrained, high-efficiency TV/PC power supplies.
Availability
KBJ3506 is available at Aetrix Electronics and suitable for TV power supply, PC ATX power supply, and game console adapter designs requiring stable component supply, UL-recognized safety compliance, and RoHS 3–compliant manufacturing.
Supply support for KBJ3506 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 consumer markets.
The KBJ series bridges belong to Diodes' standard recovery rectifier product line, engineered for cost-sensitive, high-volume AC/DC front-end applications where thermal robustness, safety certification, and manufacturability are prioritized over ultra-fast switching.
FAQ
What is the maximum case temperature for continuous 35A operation?
KBJ3506 delivers 35A average forward current only when mounted on an adequate heatsink and maintained at TC ≤ +95°C. Without heatsink, its derated current drops to 3.5A at TC = +125°C, as shown in Figure 1 of the datasheet. Thermal design must ensure junction temperature remains within –55°C to +150°C limits.
Is KBJ3506 suitable for high-frequency switching applications like PFC or LLC resonant converters?
No - KBJ3506 is a standard recovery bridge rectifier with no specified reverse recovery time (trr), indicating it is optimized for 50/60Hz line-frequency rectification. Its 165pF junction capacitance and lack of soft-recovery characteristics make it unsuitable for high-frequency (>20kHz) switching stages where reverse recovery losses dominate.
Does KBJ3506 meet automotive qualification standards such as AEC-Q101?
KBJ3506 itself is not AEC-Q101 qualified, but Diodes states that automotive-grade versions with AEC-Q101/200 qualification, PPAP capability, and IATF 16949 manufacturing are available upon request. Standard KBJ3506 is intended for industrial and consumer applications, not safety-critical automotive ECUs.
How does the "Green" material designation impact PCB assembly and reliability?
The "Green" designation confirms halogen- and antimony-free molding compound (<900ppm Br, <900ppm Cl, <1000ppm Sb), which eliminates corrosive halogen gas emission during soldering and improves long-term insulation resistance. This enhances reliability in humid environments and meets IPC-J-STD-020 moisture sensitivity level (MSL) requirements for reflow compatibility.
KBJ3506 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):
- 600 V
- Current - Average Rectified (Io):
- 35 A
- Voltage - Forward (Vf) (Max) @ If:
- 1.05 V @ 17.5 A
- Current - Reverse Leakage @ Vr:
- 10 µA @ 600 V
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- KBJ
KBJ3506 FAQ
1.How can I place an order for KBJ3506 through Aetrix?
Please submit a Request for Quotation (RFQ) for KBJ3506 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 KBJ3506 reliable?
The price and inventory of KBJ3506 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KBJ3506 is usually 5 days.
3.What payment methods are accepted for KBJ3506?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KBJ3506 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KBJ3506?
KBJ3506 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KBJ3506 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 KBJ3506?
For technical support, including KBJ3506 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KBJ3506 requirements.
6.How does Aetrix verify that KBJ3506 is sourced from the original manufacturer or authorized distributors?
All KBJ3506 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 KBJ3506 meets industry standards.
7.What is the process for return or replacement of KBJ3506?
All KBJ3506 units undergo pre-shipment inspection (PSI). If there is an issue with KBJ3506, 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 KBJ3506 part is unused and in its original packaging.
Return procedure for KBJ3506:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
KBJ3506 Tags
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HDS10M-13
Diodes Incorporated
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CD-MBL106S
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Diodes Incorporated
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Bourns Inc.
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Micro Commercial Co
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Micro Commercial Co
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Bourns Inc.
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Infineon Technologies
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Diodes Incorporated
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Bourns Inc.
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Diodes Incorporated
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Diodes Incorporated
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