KBU6G-E4/51 Equivalent & Substitute Parts

Part Overview

The KBU6G-E4/51 is a single-phase bridge rectifier manufactured by Vishay General Semiconductor - Diodes Division, rated for 400 V peak reverse voltage and 6 A average rectified current. This component is designed for through-hole mounting applications requiring standard bridge rectification in industrial and power conversion circuits. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating, making it suitable for long-term deployment in standard operating environments.

Substitute parts become necessary when inventory constraints, lead time requirements, or application-specific current demands exceed the primary part's specifications while maintaining compatibility with the circuit's voltage and thermal requirements.

Substiute Parts

KBU6G-E4/51

Vishay General Semiconductor - Diodes DivisionIn Stock: 1431KBU6G-E4/51 Datasheet

Current PartRFQ

GBU2504-G

Comchip TechnologyIn Stock: 942GBU2504-G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the KBU6G-E4/51 is determined by the following critical parameters:

• Voltage Rating: Peak reverse voltage must equal or exceed 400 V to maintain circuit protection and component reliability
• Mounting Type: Through-hole configuration is required for PCB compatibility
• Package Family: 4-SIP package format ensures mechanical and electrical interchangeability
• Compliance: RoHS3 compliance and unlimited MSL rating ensure regulatory and environmental compatibility
• Current Capacity: Average rectified current may exceed 6 A in substitute parts, provided forward voltage and thermal characteristics remain within acceptable circuit operating margins

The GBU2504-G qualifies as a manufacturer-recommended substitute based on matching voltage rating, mounting type, package family, and compliance certifications, while providing increased current capacity of 25 A.

Parameter Comparison

Engineering Selection Recommendations

Both the KBU6G-E4/51 and GBU2504-G maintain Active product status with full RoHS3 compliance and unlimited moisture sensitivity ratings, ensuring regulatory compliance and long-term availability. The GBU2504-G provides higher current capacity (25 A versus 6 A) while maintaining identical peak reverse voltage (400 V) and comparable forward voltage characteristics. Selection between these parts depends on circuit current requirements and thermal management capabilities. Both components are suitable for industrial applications requiring standard bridge rectification at 400 V.

Frequently Asked Questions (FAQ)

Q: Can the GBU2504-G replace the KBU6G-E4/51 in all applications?

A: The GBU2504-G is electrically compatible with the KBU6G-E4/51 for circuits operating at or below 6 A average rectified current. The higher current rating of the GBU2504-G does not create incompatibility at lower current levels. Both components share identical peak reverse voltage (400 V), forward voltage characteristics, and through-hole 4-SIP package configuration.

Q: What are the package differences between KBU and GBU variants?

A: Both the KBU6G-E4/51 and GBU2504-G use 4-SIP (Single In-line Package) through-hole configuration. The KBU designation refers to the Vishay package family, while GBU refers to the Comchip package family. Both are mechanically and electrically compatible for through-hole PCB mounting.

Q: Are there compliance or environmental differences between these parts?

A: Both parts maintain RoHS3 compliance, unlimited moisture sensitivity rating (MSL 1), and REACH Unaffected status. No compliance or environmental restrictions differentiate these components for standard industrial applications.

Q: How do reverse leakage currents compare?

A: The KBU6G-E4/51 specifies 5 µA reverse leakage at 400 V, while the GBU2504-G specifies 10 µA at 400 V. This difference is within acceptable parameters for standard bridge rectifier applications and does not impact circuit functionality in typical power conversion circuits.

Q: What is the temperature operating range difference?

A: The KBU6G-E4/51 operates from -50°C to 150°C, while the GBU2504-G operates from -55°C to 150°C. The GBU2504-G provides extended low-temperature capability, making it suitable for applications requiring operation below -50°C.