KBJ2508G Bridge Rectifier Equivalent & Substitute Parts

Part Overview

The KBJ2508G is a single-phase bridge rectifier manufactured by GeneSiC Semiconductor, rated for 800 V peak reverse voltage and 25 A average rectified current. This component is designed for Through Hole mounting in the 4-SIP KBJ package configuration. The part maintains Active product status with RoHS compliance and unlimited moisture sensitivity rating.

Substitute parts become necessary when the KBJ2508G reaches end-of-life status, inventory constraints occur, or when application requirements permit operation at lower current ratings while maintaining the same voltage class and package form factor.

Substiute Parts

KBJ2508G

GeneSiC SemiconductorIn Stock: 754KBJ2508G Datasheet

Current PartRFQ

KBJ408G

Diodes IncorporatedIn Stock: 2238KBJ408G Datasheet

SimilarRFQ

KBJ608G

Diodes IncorporatedIn Stock: 30461KBJ608G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the KBJ2508G is determined by strict adherence to the following parameters:

Mandatory Matching Parameters:

• Voltage - Peak Reverse (Max): 800 V
• Diode Type: Single Phase
• Mounting Type: Through Hole
• Package / Case: 4-SIP, KBJ
• Technology: Standard

Variable Parameters (Permits Substitution):

• Current - Average Rectified (Io): Lower ratings acceptable if application current demand does not exceed substitute part rating
• Voltage - Forward (Vf): Variations within thermal design margins
• Current - Reverse Leakage: Lower leakage acceptable
• Operating Temperature Range: Extended ranges acceptable

The KBJ408G and KBJ608G meet all mandatory matching criteria. Both parts maintain 800 V peak reverse voltage rating, single-phase configuration, Through Hole mounting, and KBJ package specification. Current ratings of 4 A and 6 A respectively are lower than the primary part's 25 A rating and are suitable only for applications with proportionally reduced current requirements.

Parameter Comparison

Engineering Selection Recommendations

KBJ408G Selection Criteria: The KBJ408G is suitable for applications requiring 4 A or less average rectified current at 800 V peak reverse voltage. This substitute maintains full voltage class compatibility and package form factor equivalence. The part carries ROHS3 compliance and REACH Unaffected status. Operating temperature range extends to -65°C to 150°C, providing broader thermal operating margins than the primary part.

KBJ608G Selection Criteria: The KBJ608G accommodates applications requiring 6 A or less average rectified current at 800 V peak reverse voltage. This substitute maintains identical voltage and package specifications. The part carries ROHS3 compliance and REACH Unaffected status. Operating temperature range extends to -65°C to 150°C, matching the KBJ408G thermal envelope.

Compliance Considerations: Both substitute parts maintain RoHS compliance through ROHS3 certification. The KBJ408G and KBJ608G both carry REACH Unaffected status, whereas the primary KBJ2508G does not specify REACH status. All three parts share EAR99 ECCN classification and identical HTSUS commodity code 8541.10.0080.

Frequently Asked Questions (FAQ)

Q: Can KBJ408G or KBJ608G replace KBJ2508G in any application?

A: No. Substitution is valid only when the application's actual average rectified current requirement does not exceed the substitute part's rating. KBJ408G supports maximum 4 A; KBJ608G supports maximum 6 A. The primary part KBJ2508G is rated for 25 A. Applications requiring current above the substitute part's rating cannot use these alternatives.

Q: Are the package dimensions identical between KBJ2508G, KBJ408G, and KBJ608G?

A: Yes. All three parts use the 4-SIP KBJ package configuration with Through Hole mounting. Physical footprint and pin layout are identical, permitting direct mechanical substitution when electrical parameters permit.

Q: What is the difference in forward voltage drop between these parts?

A: The KBJ2508G specifies 1.05 V maximum forward voltage at 12.5 A. The KBJ408G and KBJ608G both specify 1 V maximum forward voltage at their respective test currents (2 A and 3 A). Forward voltage characteristics are current-dependent; direct comparison at identical current levels is not provided in the specifications.

Q: Do the substitute parts have better temperature performance?

A: The KBJ408G and KBJ608G both operate across -65°C to 150°C, compared to the KBJ2508G range of -55°C to 125°C. The substitute parts provide extended low-temperature operation to -65°C and extended high-temperature operation to 150°C.

Q: Are there any REACH or environmental compliance differences?

A: The KBJ408G and KBJ608G both carry REACH Unaffected status. The KBJ2508G does not specify REACH status in the provided data. All three parts are RoHS compliant and carry MSL 1 (Unlimited) moisture sensitivity rating.

Q: What is the reverse leakage current difference?

A: The KBJ2508G specifies 10 µA maximum reverse leakage at 800 V. Both KBJ408G and KBJ608G specify 5 µA maximum reverse leakage at 800 V. Lower reverse leakage in the substitute parts indicates reduced minority carrier current at rated voltage.