KBU1004 Bridge Rectifier Equivalent & Substitute Parts

Part Overview

The KBU1004 is a single-phase bridge rectifier manufactured by GeneSiC Semiconductor, rated for 400 V peak reverse voltage and 10 A average rectified current. This component is designed for through-hole mounting applications requiring standard bridge rectification in AC-to-DC conversion circuits. The part maintains Active product status with full RoHS compliance and unlimited moisture sensitivity rating. Substitute parts are identified based on matching electrical specifications and mechanical compatibility within the bridge rectifier category.

Substiute Parts

KBU1004

GeneSiC SemiconductorIn Stock: 1515KBU1004 Datasheet

Current PartRFQ

GBU2504-G

Comchip TechnologyIn Stock: 942GBU2504-G Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the KBU1004 is determined by the following critical parameters:

Mandatory Matching Criteria:

• Diode Type: Single Phase
• Technology: Standard
• Voltage - Peak Reverse (Max): 400 V
• Mounting Type: Through Hole
• Operating Temperature Range: -55°C to 150°C (TJ)

Allowable Variation Criteria:

• Current - Average Rectified (Io): Equal to or greater than 10 A
• Voltage - Forward (Vf): Within acceptable forward voltage specifications
• Current - Reverse Leakage: Equal to or less than specified maximum
• Package / Case: Alternative through-hole bridge rectifier packages (KBU, GBU, or equivalent 4-SIP configurations)

The GBU2504-G qualifies as a substitute because it maintains identical voltage ratings, temperature range, and mounting type while providing higher current capacity (25 A versus 10 A). The forward voltage and reverse leakage specifications remain within acceptable parameters for bridge rectifier applications.

Parameter Comparison

Engineering Selection Recommendations

KBU1004 Selection Criteria:

• Applications requiring exactly 10 A average rectified current
• Space-constrained designs where current headroom is not required
• GeneSiC Semiconductor component preference or supply chain requirements
• Bulk packaging requirements

GBU2504-G Selection Criteria:

• Applications where current capacity exceeding 10 A provides design margin
• Comchip Technology component availability or supply chain optimization
• Tube packaging requirements for automated assembly processes
• ROHS3 compliance requirement (enhanced environmental standard)

Both parts maintain identical voltage ratings, temperature operating range, and through-hole mounting compatibility. Selection between KBU1004 and GBU2504-G depends on current capacity requirements, packaging format, and manufacturer availability. The GBU2504-G provides higher current capacity within the same voltage and temperature specifications.

Frequently Asked Questions (FAQ)

Q: Can GBU2504-G directly replace KBU1004 in existing PCB designs?

A: Yes, provided the PCB footprint accommodates the GBU package. Both parts use 4-SIP through-hole configuration. Verify mechanical pin spacing and hole diameter compatibility with your PCB layout before substitution.

Q: What is the difference between KBU and GBU package designations?

A: KBU and GBU are manufacturer-specific package designations for single-phase bridge rectifiers in 4-SIP through-hole format. Both packages maintain identical electrical interface and mounting type. Physical dimensions may vary slightly between manufacturers; verify PCB footprint compatibility.

Q: Why does GBU2504-G have higher current rating (25 A) than KBU1004 (10 A)?

A: Current rating differences reflect different semiconductor die designs and thermal management characteristics between manufacturers. Higher current rating does not affect compatibility; it indicates greater current capacity margin for the application.

Q: Are there compliance differences between KBU1004 and GBU2504-G?

A: KBU1004 is RoHS Compliant. GBU2504-G is ROHS3 Compliant, which represents an enhanced environmental standard. Both parts are RoHS-compliant and suitable for regulated applications. GBU2504-G meets stricter environmental requirements.

Q: What packaging format should I specify for production?

A: KBU1004 is supplied in Bulk packaging. GBU2504-G is supplied in Tube packaging. Tube packaging is standard for automated assembly processes. Bulk packaging is suitable for manual assembly or lower-volume applications. Specify packaging format based on your manufacturing process requirements.

Q: Can I use GBU2504-G in a 10 A application designed for KBU1004?

A: Yes. GBU2504-G is rated for 25 A average rectified current, which exceeds the 10 A requirement. The part will operate within its specifications in a 10 A application. No circuit modifications are required.