KBJ404G Bridge Rectifier Equivalent & Substitute Parts

Part Overview

The KBJ404G is a single-phase bridge rectifier designed for standard 400 V applications with 4 A average rectified current capacity. This component is classified as Active and RoHS Compliant, serving as a fundamental power conversion element in AC-to-DC rectification circuits. The KBJ404G is manufactured by GeneSiC Semiconductor in bulk packaging with through-hole mounting configuration.

Substitute parts become necessary when the original manufacturer's stock is unavailable, when alternative packaging formats are required for assembly processes, or when design specifications allow for equivalent electrical performance from alternative manufacturers. The KBJ404G maintains consistent electrical characteristics across qualified substitute sources, enabling direct functional replacement within specified parameter tolerances.

Substiute Parts

KBJ404G

GeneSiC SemiconductorIn Stock: 1114KBJ404G Datasheet

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KBJ404G

Diodes IncorporatedIn Stock: 1018KBJ404G Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the KBJ404G is determined by strict alignment with the following electrical and mechanical parameters:

Critical Matching Parameters:

• Voltage - Peak Reverse (Max): 400 V minimum
• Current - Average Rectified (Io): 4 A minimum
• Mounting Type: Through Hole
• Package / Case: 4-SIP, KBJ form factor
• Diode Type: Single Phase
• Technology: Standard

Performance Parameters (Acceptable Variation):

• Voltage - Forward (Vf) (Max): Substitute values equal to or lower than 1.1 V @ 4 A are acceptable
• Current - Reverse Leakage @ Vr: Substitute values equal to or lower than 5 µA @ 400 V are acceptable
• Operating Temperature Range: Substitute range must encompass or exceed the application's required operating window

Compliance Parameters:

• RoHS Status: Must maintain RoHS compliance or equivalent regulatory certification
• Moisture Sensitivity Level (MSL): Level 1 (Unlimited) maintained across substitutes

The KBJ404G manufactured by Diodes Incorporated qualifies as a direct substitute based on identical electrical ratings, matching package configuration, and equivalent regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection (GeneSiC KBJ404G): Select the GeneSiC Semiconductor KBJ404G when bulk packaging is compatible with assembly processes and when the -55°C to 150°C operating range meets application requirements. This part maintains Active product status with established supply chain availability.

Substitute Selection (Diodes Incorporated KBJ404G): The Diodes Incorporated KBJ404G serves as a direct functional equivalent when tube packaging is required for automated pick-and-place assembly operations. This substitute provides an extended lower operating temperature limit (-65°C versus -55°C), which accommodates applications requiring enhanced cold-temperature performance. Both parts maintain identical peak reverse voltage and average rectified current ratings, ensuring electrical interchangeability within the specified 4-SIP, KBJ package footprint.

Compliance Considerations: Both manufacturers provide RoHS compliance certification. The Diodes Incorporated variant specifies ROHS3 compliance and includes REACH Unaffected status, providing additional regulatory documentation for applications requiring enhanced compliance verification.

Packaging Impact: Bulk packaging (GeneSiC) suits manual assembly and prototype applications. Tube packaging (Diodes Incorporated) integrates with high-volume automated assembly lines. Component selection should align with production methodology and inventory management requirements.

Frequently Asked Questions (FAQ)

Q: Can the Diodes Incorporated KBJ404G replace the GeneSiC KBJ404G in existing designs?

A: Yes. Both parts share identical electrical specifications (400 V peak reverse voltage, 4 A average rectified current) and matching 4-SIP, KBJ package geometry. Direct PCB footprint compatibility is maintained. The only differences are manufacturer source, packaging format (tube versus bulk), and extended temperature range on the Diodes Incorporated version.

Q: What is the significance of the different forward voltage specifications (1.1 V @ 4 A versus 1 V @ 2 A)?

A: These represent different measurement conditions. The GeneSiC specification measures forward voltage at full rated current (4 A), while the Diodes Incorporated specification measures at 2 A. At equivalent current levels, the Diodes Incorporated part demonstrates lower forward voltage characteristics, resulting in reduced power dissipation and improved thermal performance.

Q: Does the extended temperature range (-65°C to 150°C) of the Diodes Incorporated part provide advantages?

A: The extended lower temperature limit accommodates applications operating in cold environments. If your circuit operates only within the -55°C to 150°C range, both parts perform identically. Selection should be based on actual application temperature requirements and any cost or availability differences between manufacturers.

Q: Are there any compatibility issues with different packaging formats?

A: No electrical compatibility issues exist. Bulk and tube packaging contain identical components with identical electrical performance. Packaging selection depends on assembly process requirements: bulk packaging suits manual assembly and small-volume production, while tube packaging integrates with automated assembly equipment.

Q: What compliance certifications apply to both substitute options?

A: Both parts maintain RoHS compliance. The GeneSiC part specifies RoHS Compliant status. The Diodes Incorporated part specifies ROHS3 Compliant status and includes REACH Unaffected documentation. Both parts carry Moisture Sensitivity Level 1 (Unlimited), indicating no moisture-related handling restrictions.

Q: Can I use these parts interchangeably in high-volume production?

A: Yes, provided your assembly equipment accommodates the selected packaging format. Tube packaging (Diodes Incorporated) integrates directly with automated pick-and-place systems. Bulk packaging (GeneSiC) requires manual handling or custom feeder configuration. Electrical performance remains identical across both options.