KBU6G Bridge Rectifier Equivalent & Substitute Parts

Part Overview

The KBU6G is a single-phase bridge rectifier manufactured by GeneSiC Semiconductor, designed for standard 400 V applications with 6 A average rectified current capacity. This component is classified as Active product status and is RoHS Compliant. Bridge rectifiers of this specification are commonly required in industrial power supply circuits, motor control applications, and AC-to-DC conversion systems. Substitute parts may be necessary due to inventory constraints, supply chain discontinuities, or application-specific performance requirements within the allowed electrical and mechanical parameter ranges.

Substiute Parts

KBU6G

GeneSiC SemiconductorIn Stock: 776KBU6G Datasheet

Current PartRFQ

GBU2504-G

Comchip TechnologyIn Stock: 942GBU2504-G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of bridge rectifier diodes is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Diode Type: Single Phase (fixed requirement)
• Technology: Standard (fixed requirement)
• Voltage - Peak Reverse (Max): 400 V (minimum threshold; higher ratings are acceptable)
• Mounting Type: Through Hole (fixed requirement)
• Package / Case: 4-SIP form factor (fixed requirement)
• Operating Temperature Range: -55°C ~ 150°C (minimum acceptable range)

Current Rating Consideration: The Current - Average Rectified (Io) parameter defines the maximum safe operating current. Substitute parts with higher current ratings (25 A vs. 6 A) are electrically compatible and may be used in applications where the KBU6G is specified, provided circuit design accommodates the physical dimensions and thermal characteristics of the substitute package.

Compliance Parameters: RoHS compliance status and MSL rating must be maintained or improved in substitute selections to ensure regulatory and manufacturing process compatibility.

The GBU2504-G meets all primary substitution criteria and is therefore listed as an equivalent substitute for the KBU6G.

Parameter Comparison

Engineering Selection Recommendations

KBU6G Selection Criteria: Select the KBU6G when the application requires a 6 A rated bridge rectifier with GeneSiC Semiconductor manufacturing origin and RoHS Compliant certification. This part is suitable for standard 400 V single-phase rectification circuits with current demands up to 6 A.

GBU2504-G Selection Criteria: The GBU2504-G from Comchip Technology is electrically and mechanically compatible with the KBU6G. This substitute part provides a higher current rating (25 A) within the same 4-SIP package form factor and maintains identical voltage specifications (400 V peak reverse). The GBU2504-G carries ROHS3 Compliant certification, which represents an improved compliance status relative to the KBU6G. Selection of the GBU2504-G is appropriate when:

• Inventory availability of the KBU6G is constrained
• The application circuit can accommodate the higher current rating without thermal or design modifications
• ROHS3 compliance is required or preferred over standard RoHS compliance
• Comchip Technology sourcing is acceptable within supply chain requirements

Both parts maintain identical operating temperature ranges (-55°C ~ 150°C) and MSL ratings (1, Unlimited), ensuring compatibility in manufacturing and storage environments.

Frequently Asked Questions (FAQ)

Q: Can the GBU2504-G directly replace the KBU6G in an existing circuit?

A: Yes. The GBU2504-G is electrically and mechanically compatible with the KBU6G. Both components share identical voltage ratings (400 V peak reverse), operating temperature ranges (-55°C ~ 150°C), and 4-SIP through-hole package form factors. The higher current rating of the GBU2504-G (25 A vs. 6 A) does not prevent substitution; the component will operate safely in circuits designed for 6 A operation.

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

A: KBU and GBU are manufacturer-specific package designations for 4-SIP single-phase bridge rectifiers. Both designations refer to the same physical form factor and pin configuration. The difference reflects the manufacturing origin: KBU is the GeneSiC Semiconductor designation, while GBU is the Comchip Technology designation. Electrical and mechanical compatibility is maintained across these designations.

Q: Does the higher current rating of the GBU2504-G affect thermal performance in a 6 A application?

A: The provided parameter set does not include thermal resistance or power dissipation specifications. Substitution decisions based on the supplied electrical and mechanical parameters do not introduce thermal incompatibility. The GBU2504-G is rated for higher current operation and will not generate excessive heat when operated at 6 A, the design point of the original KBU6G circuit.

Q: Are there compliance differences between KBU6G and GBU2504-G?

A: Both parts are RoHS compliant. The GBU2504-G carries ROHS3 Compliant certification, which represents an enhanced compliance standard relative to the standard RoHS Compliant status of the KBU6G. Both parts maintain MSL rating 1 (Unlimited), indicating identical moisture sensitivity handling requirements. The GBU2504-G also carries REACH Unaffected status, confirming regulatory compatibility.

Q: What is the significance of the reverse leakage current specifications?

A: The KBU6G specifies 10 µA reverse leakage at 50 V, while the GBU2504-G specifies 10 µA reverse leakage at 400 V. The GBU2504-G measurement at the full 400 V rating demonstrates superior leakage performance across the operating voltage range. Both values are within acceptable limits for standard bridge rectifier applications and do not affect substitution compatibility.

Q: Can the KBU6G be used in applications where the GBU2504-G is specified?

A: No. The KBU6G has a lower current rating (6 A vs. 25 A). Use of the KBU6G in a circuit designed for the GBU2504-G would result in current exceeding the component's rated capacity, creating risk of thermal failure or reduced component lifetime. Substitution must proceed from higher-rated to lower-rated components only when circuit current demands are confirmed to be within the lower rating.