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Home > Products > Discrete Semiconductor Products > Diodes > Bridge Rectifiers

GeneSiC Semiconductor KBJ401G

Name: KBJ401G
Brand: GeneSiC Semiconductor
SKU: KBJ401G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: KBJ401G

Manufacturer:: GeneSiC Semiconductor

Category:: Bridge Rectifiers

Package:: 4-SIP, KBJ

Datasheet:: KBJ401G.pdf

Description:: BRIDGE RECT 1PHASE 100V 4A KBJ

Quantity:: RFQ Add To RFQ list

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Inventory:3,467

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Product details

Overview

KBJ401G from Diodes Incorporated is a 4.0A standard recovery bridge rectifier with 100V maximum repetitive peak reverse voltage (V_RRM), 1.0V forward voltage at 2.0A, and 5.0µA reverse leakage current at 25°C - used in AC/DC power supplies for industrial control panels requiring robust through-hole rectification.

For engineers reviewing the KBJ401G datasheet, KBJ401G pinout, KBJ401G application, or KBJ401G equivalent, key selection criteria include V_RRM margin for line-voltage transients, thermal resistance (5.5°C/W junction-to-case), surge rating (120A peak), and UL recognition (E95060) for safety-compliant designs.

Technical Context

This single-package, four-diode bridge integrates glass-passivated silicon junctions to deliver standardized recovery behavior suitable for 50/60Hz mains rectification. Its 1500V_RMS dielectric strength between case and terminals ensures isolation integrity in grounded-chassis systems.

The device operates across –55°C to +150°C junction temperature, with thermal performance validated using a 75mm × 75mm × 1.6mm aluminum heatsink. Reverse leakage remains ≤5.0µA at 25°C and ≤500µA at 125°C, supporting stable DC bus hold-up under elevated ambient conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	100 V - Withstands peak AC line voltage up to 100V without breakdown; sufficient for 70V RMS input applications.
I_F(AV)	4.0 A - Continuous average forward current per diode leg at T_J = 150°C with heatsink; defines steady-state power supply output capability.
V_F	1.0 V @ 2.0A - Forward conduction loss per diode pair; determines ~2.0W dissipation at full load before heatsinking.
I_FSM	120 A - Non-repetitive surge current rating for 8.3ms half-sine; supports inrush limiting during cold-start of transformer-fed supplies.
R_θJC	5.5 °C/W - Junction-to-case thermal resistance; enables thermal design using standard mounting hardware and aluminum heatsinks.
I_R	5.0 µA @ 25°C - Low reverse leakage preserves DC bus stability in high-impedance filter networks.

Pinout & Package

Package: KBJ - Molded plastic, UL 94V-0 rated, tin-plated leads, through-hole mount compatible with #6 screw, 4.6g mass.

Pin/Terminal	Circuit Role	Design Meaning
~AC1	AC Input Terminal 1	One side of AC input winding; connects to primary of step-down transformer or mains input via fuse.
~AC2	AC Input Terminal 2	Other side of AC input winding; completes full-wave bridge input path.
+DC	Positive DC Output	Anode of output diode pair; delivers rectified positive rail to bulk capacitor and regulator stage.
–DC	Negative DC Output / Common	Cathode of output diode pair; serves as circuit ground reference and return path for load current.

Key Features

Feature	Design Value
Glass passivated die construction	Enhances long-term reliability and moisture resistance in humid industrial environments without hermetic sealing.
1500V_RMS case dielectric strength	Meets reinforced insulation requirements for Class I equipment with protective earth connection.
UL Recognized Component (E95060)	Validates compliance with UL 60747-4 for discrete semiconductors, reducing end-product certification effort.
Lead-free, RoHS-compliant finish	Enables compliance with EU directives 2011/65/EU and 2015/863/EU without post-process plating or rework.

Applications

Industrial AC/DC Power Supply

Motor Control Interface Board

Use Scenario: Converts 85–264VAC input to unregulated DC bus for switch-mode power supply front-end in PLC power modules.

IC Role / Device Role / Timing Role: Bridge rectifier providing full-wave AC-to-DC conversion with minimal conduction loss and thermal derating margin.

Use Value: 4.0A average current rating and 120A surge capacity support transient-heavy loads like solenoid drivers and relay coils.

Use Scenario: Rectifies auxiliary 24VAC control power for H-bridge gate driver logic in variable-frequency drives.

IC Role / Device Role / Timing Role: Isolated AC input conditioning stage delivering clean, low-leakage DC to optocoupler bias and microcontroller LDO inputs.

Use Value: 5.0µA max reverse leakage at 25°C prevents false triggering in high-impedance enable circuits.

Building Automation HVAC Controller

Test Equipment AC Mains Adapter

Use Scenario: Provides regulated 12VDC for thermostat microcontrollers and sensor interfaces powered from 24VAC HVAC transformers.

IC Role / Device Role / Timing Role: Compact through-hole bridge enabling PCB-level integration without external heat spreaders.

Use Value: KBJ package footprint and #6 screw mounting allow secure mechanical attachment in vibration-prone duct-mounted enclosures.

Use Scenario: Delivers isolated DC output from benchtop variac sources for calibration of multimeters and oscilloscope power rails.

IC Role / Device Role / Timing Role: Safety-rated rectification stage meeting UL E95060 requirements for test instrumentation input stages.

Use Value: 1500V_RMS dielectric strength ensures operator protection during fault conditions in lab environments.

Equivalent & Alternatives

The following parts are listed as comparable options for similar bridge rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
GBU4A	Same 100V V_RRM, 4.0A I_F(AV), but GBU package (larger footprint, higher R_θJC = 7.0°C/W)	Requires larger PCB area and more aggressive heatsinking for equivalent thermal performance	Select when legacy GBU layout compatibility is required and board space permits
DB101	Lower V_RRM (50V), same I_F(AV), smaller DO-15 package, no UL recognition	Not suitable for 100V-line applications; lacks safety certification for end-equipment compliance	Only acceptable for low-voltage DC-DC input stages where isolation and certification are not mandated

Compared with GBU4A and DB101, KBJ401G uniquely combines UL recognition, compact KBJ footprint, 5.5°C/W thermal resistance, and 100V rating - making it optimal for space-constrained, safety-certified industrial power supplies.

Availability

KBJ401G is available at Aetrix Electronics and suitable for industrial AC/DC power supplies, motor control interface boards, and building automation HVAC controllers requiring stable component supply with full traceability and long-lifecycle support.

Supply support for KBJ401G 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.

KBJ401G belongs to Diodes' standard recovery bridge rectifier product line, engineered for cost-effective, high-reliability AC/DC conversion in industrial, commercial, and infrastructure power systems.

FAQ

What is the maximum operating temperature for KBJ401G?

KBJ401G has a specified junction temperature range of –55°C to +150°C. Its thermal resistance is characterized at 5.5°C/W junction-to-case when mounted on a 75mm × 75mm × 1.6mm aluminum heatsink. Derating curves in DS21206 show usable current drops linearly above +100°C ambient if heatsink area or airflow is constrained.

Is KBJ401G suitable for automotive applications?

KBJ401G is not AEC-Q101 qualified and is not intended for automotive use. Diodes Incorporated explicitly states that automotive-grade variants require PPAP capability, IATF 16949 manufacturing, and AEC-Q100/101 qualification - none of which apply to this standard industrial bridge rectifier.

Does KBJ401G have lead-free and RoHS-compliant construction?

Yes. KBJ401G features lead-free, RoHS-compliant terminations per EU Directives 2011/65/EU and 2015/863/EU, with exemptions applied as documented by Diodes Incorporated. The molded plastic body meets UL 94V-0 flammability requirements, and all plating complies with MIL-STD-202 solderability standards.

How is polarity marked on the KBJ401G package?

Polarity is molded directly onto the plastic body: "+" and "–" symbols identify the DC output terminals, while "~" marks both AC input terminals. The physical orientation follows standard KBJ bridge layout - with AC terminals on left/right and DC terminals on top/bottom when viewed with marking side up and leads pointing downward.

KBJ401G Specifications

Product attributes: Attribute value

Manufacturer:: GeneSiC Semiconductor

Series:: -

Package/Case:: 4-SIP, KBJ

Packaging:: Bulk

Product Status:: Active

Diode Type:: Single Phase

Technology:: Standard

Voltage - Peak Reverse (Max):: 100 V

Current - Average Rectified (Io):: 4 A

Voltage - Forward (Vf) (Max) @ If:: 1.1 V @ 4 A

Current - Reverse Leakage @ Vr:: 5 µA @ 100 V

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: KBJ

KBJ401G FAQ

1.How can I place an order for KBJ401G through Aetrix?

Please submit a Request for Quotation (RFQ) for KBJ401G 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 KBJ401G reliable?

The price and inventory of KBJ401G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KBJ401G is usually 5 days.

3.What payment methods are accepted for KBJ401G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KBJ401G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for KBJ401G?

KBJ401G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your KBJ401G 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 KBJ401G?

For technical support, including KBJ401G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KBJ401G requirements.

6.How does Aetrix verify that KBJ401G is sourced from the original manufacturer or authorized distributors?

All KBJ401G 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 KBJ401G meets industry standards.

7.What is the process for return or replacement of KBJ401G?

All KBJ401G units undergo pre-shipment inspection (PSI). If there is an issue with KBJ401G, 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 KBJ401G part is unused and in its original packaging.

Return procedure for KBJ401G:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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