KBU6B Bridge Rectifier Single Phase 100V 6A Equivalent & Substitute Parts

Part Overview

The KBU6B is a single-phase bridge rectifier manufactured by onsemi, rated for 100V peak reverse voltage and 6A average rectified current. This component is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. The KBU6B operates across a wide temperature range of -55°C to 150°C and is housed in a 4-SIP through-hole package configuration.

Key Parameters

Parameter	Value
Diode Type	Single Phase
Technology	Standard
Voltage - Peak Reverse (Max)	100 V
Current - Average Rectified (Io)	6 A
Voltage - Forward (Vf) (Max) @ If	1 V @ 6 A
Current - Reverse Leakage @ Vr	5 µA @ 100 V
Operating Temperature	-55°C ~ 150°C (TJ)
Mounting Type	Through Hole
Package / Case	4-SIP

Substitute Part Grouping Explanation

Substitution for the KBU6B is determined by the following critical parameters: single-phase diode type, standard technology, 100V peak reverse voltage rating, through-hole mounting, and 4-SIP package configuration. The average rectified current rating of 6A establishes the primary selection criterion for direct equivalents.

Substitute parts are grouped into two categories:

Direct Equivalent: Parts with identical electrical specifications (100V, 6A) and compatible package footprints.

Similar Equivalents: Parts with the same voltage rating (100V) and through-hole 4-SIP mounting but with different current ratings (4A to 8A). These are suitable for applications where the load current requirement is lower than or equal to the substitute part's rating.

Parameter Comparison

Part Number	Manufacturer	Voltage - Peak Reverse (Max)	Current - Average Rectified (Io)	Voltage - Forward (Vf) (Max) @ If	Current - Reverse Leakage @ Vr	Operating Temperature	Package / Case	Product Status
KBU6B	onsemi	100 V	6 A	1 V @ 6 A	5 µA @ 100 V	-55°C ~ 150°C	4-SIP, KBU	Obsolete
GBU6B	onsemi	100 V	6 A	1 V @ 6 A	5 µA @ 100 V	-55°C ~ 150°C	4-SIP, GBU	Not For New Designs
GBU601-G	Comchip Technology	100 V	6 A	1 V @ 3 A	10 µA @ 100 V	-55°C ~ 150°C	4-SIP, GBU	Active
GBU801-G	Comchip Technology	100 V	8 A	1 V @ 4 A	5 µA @ 100 V	-55°C ~ 150°C	4-SIP, GBU	Active
GBU401-G	Comchip Technology	100 V	4 A	1 V @ 2 A	10 µA @ 100 V	-55°C ~ 150°C	4-SIP, GBU	Active
GBU2501-G	Comchip Technology	100 V	4.2 A	1 V @ 12.5 A	10 µA @ 50 V	-55°C ~ 150°C	4-SIP, GBU	Active

Engineering Selection Recommendations

GBU6B (onsemi): Provides parametric equivalence to KBU6B with identical electrical specifications and temperature range. However, this part is classified as "Not For New Designs," limiting its suitability for new product development despite its availability.

GBU601-G (Comchip Technology): Offers direct electrical equivalence at 100V and 6A with active product status. This part is suitable for direct replacement in applications requiring the full 6A rating. RoHS3 compliance and active status make this the preferred choice for new designs.

GBU801-G (Comchip Technology): Rated for 8A at 100V with active product status and RoHS3 compliance. This part is suitable for applications where the load current does not exceed 6A, as the higher current rating provides design margin. The reverse leakage specification matches the original KBU6B.

GBU401-G (Comchip Technology): Rated for 4A at 100V with active product status. This part is suitable only for applications where the required load current does not exceed 4A.

GBU2501-G (Comchip Technology): Rated for 4.2A at 100V with active product status. This part is suitable only for applications where the required load current does not exceed 4.2A.

Selection should prioritize parts with active product status and RoHS3 compliance for new designs. Current rating must meet or exceed the application requirement.

Frequently Asked Questions (FAQ)

Q: Can GBU6B replace KBU6B directly? A: GBU6B provides identical electrical specifications and temperature range. However, it is classified as "Not For New Designs." For new product development, GBU601-G is the recommended alternative.

Q: What is the difference between KBU and GBU package designations? A: Both KBU and GBU are 4-SIP through-hole package configurations. The package designation reflects the manufacturer's internal naming convention. Both are mechanically and electrically compatible for this application.

Q: Can I use GBU801-G in place of KBU6B? A: Yes. GBU801-G is rated for 8A at 100V, which exceeds the KBU6B's 6A requirement. It is suitable for applications where the load current does not exceed 6A. The higher current rating provides additional design margin.

Q: Can I use GBU401-G or GBU2501-G in place of KBU6B? A: These parts are rated for 4A and 4.2A respectively. They are suitable only if your application requires 4A or less. Using an undersized current rating may result in excessive heat generation and reduced component life.

Q: What compliance certifications should I verify? A: For new designs, prioritize parts with RoHS3 compliance and active product status. All listed substitute parts meet REACH requirements and carry EAR99 export classification.

Q: Are there any thermal considerations when selecting a substitute? A: All listed parts operate across the same temperature range (-55°C to 150°C). Forward voltage drop and reverse leakage specifications vary slightly between manufacturers. Verify thermal performance in your specific application circuit.

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