Equivalent & Substitute Parts for KBL04/1 Bridge Rectifier

Part Overview

The KBL04/1 is a single-phase bridge rectifier manufactured by Vishay General Semiconductor - Diodes Division, rated for 400 V peak reverse voltage and 4 A average rectified current. The part is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements. Active alternatives from Comchip Technology provide direct functional replacement with improved compliance status and extended operating temperature range.

Substiute Parts

KBL04/1

Vishay General Semiconductor - Diodes DivisionIn Stock: 944KBL04/1 Datasheet

Current PartRFQ

GBU2504-G

Comchip TechnologyIn Stock: 942GBU2504-G Datasheet

MFR RecommendedRFQ

GBU404-G

Comchip TechnologyIn Stock: 990GBU404-G Datasheet

MFR RecommendedRFQ

GBU604-G

Comchip TechnologyIn Stock: 1040GBU604-G Datasheet

MFR RecommendedRFQ

GBU804-G

Comchip TechnologyIn Stock: 963GBU804-G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the KBL04/1 is determined by the following criteria:

Mandatory Parameters for Substitution:

• Diode Type: Single Phase Bridge Rectifier
• Voltage - Peak Reverse (Max): 400 V (equal or greater)
• Mounting Type: Through Hole
• Package / Case: 4-SIP form factor compatibility

Current Rating Consideration: Substitute parts are grouped by average rectified current capacity. The KBL04/1 at 4 A can be replaced by parts rated at 4 A or higher, provided all other electrical and mechanical parameters remain compatible. Higher current-rated parts operate within the same voltage class and package family.

Compliance Status: All recommended substitutes are active products with RoHS3 compliance and REACH unaffected status, addressing the obsolescence of the original KBL04/1.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent (Same Current Rating): GBU404-G is the direct functional equivalent to KBL04/1, maintaining the 4 A average rectified current rating while providing active product status and RoHS3 compliance. This part is suitable for direct replacement in existing designs without circuit modification.

Higher Current Capacity Options: GBU604-G (6 A), GBU804-G (8 A), and GBU2504-G (25 A) are suitable substitutes when circuit design permits higher current capacity. These parts maintain the 400 V voltage rating and through-hole mounting compatibility while offering increased current handling capability. Selection depends on actual circuit current requirements and thermal management considerations.

Compliance Advantage: All Comchip Technology substitutes are ROHS3 compliant and carry MSL rating of 1 (Unlimited), addressing regulatory requirements that the obsolete KBL04/1 does not meet.

Frequently Asked Questions (FAQ)

Q: Can GBU404-G directly replace KBL04/1 without circuit modification? A: Yes. GBU404-G maintains identical voltage rating (400 V), current rating (4 A), and through-hole mounting configuration. The 4-SIP package form factor is compatible with KBL footprints.

Q: What is the difference between KBL and GBU package designations? A: Both are 4-SIP through-hole bridge rectifier packages. The designation reflects manufacturer convention; electrical and mechanical compatibility is maintained across the product family.

Q: Can I use a higher current-rated part like GBU804-G instead of GBU404-G? A: Yes, provided circuit design permits. Higher current-rated parts operate within the same voltage class and package family. Circuit current requirements determine the appropriate selection.

Q: Why do substitute parts show higher reverse leakage current (10 µA vs 5 µA)? A: The specified leakage current values are within acceptable operating parameters for single-phase bridge rectifiers at 400 V. Both values meet industry standards for this component category.

Q: Are there any thermal considerations when selecting between substitute options? A: All substitutes specify operating temperature range of -55°C to 150°C (TJ). Selection should account for actual circuit thermal environment and current loading to ensure operation within specified limits.

Q: What is the significance of RoHS3 compliance on the substitute parts? A: RoHS3 compliance indicates the parts meet current environmental and hazardous substance restrictions. The obsolete KBL04/1 is RoHS non-compliant, making compliant substitutes necessary for new designs and regulated applications.