KBU6D Bridge Rectifier Equivalent & Substitute Parts

Part Overview

The KBU6D is a single-phase bridge rectifier manufactured by onsemi, rated for 200 V peak reverse voltage and 6 A average rectified current. This component is classified as obsolete, making substitute parts necessary for new designs and ongoing production requirements. The KBU6D operates across a temperature range of -55°C to 150°C and is packaged in a 4-SIP KBU through-hole configuration. Equivalent and substitute parts maintain the same electrical performance envelope while offering active product status and improved availability.

Key Parameters

Parameter	Value
Diode Type	Single Phase
Technology	Standard
Voltage - Peak Reverse (Max)	200 V
Current - Average Rectified (Io)	6 A
Voltage - Forward (Vf) (Max) @ If	1 V @ 6 A
Current - Reverse Leakage @ Vr	5 µA @ 200 V
Operating Temperature	-55°C ~ 150°C (TJ)
Mounting Type	Through Hole
Package / Case	4-SIP, KBU
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the KBU6D are selected based on the following critical parameters:

Voltage - Peak Reverse (Max): 200 V (exact match required)
Diode Type: Single Phase (exact match required)
Technology: Standard (exact match required)
Operating Temperature: -55°C ~ 150°C (exact match required)
Mounting Type: Through Hole (exact match required)
Current - Average Rectified (Io): 6 A (primary rating; parts with 4 A to 8 A are functionally compatible within design margins)

The GBU series from Comchip Technology and Vishay General Semiconductor meet these criteria. All substitute parts maintain 200 V peak reverse voltage, single-phase bridge rectifier topology, standard technology, and identical temperature operating range. Package variants (GBU vs. KBU) are mechanically and electrically interchangeable in 4-SIP through-hole applications. Current ratings vary within the substitute group to accommodate different application requirements while maintaining voltage and thermal specifications.

Parameter Comparison

Parameter	KBU6D (onsemi)	GBU6D-E3/45 (Vishay)	GBU2502-G (Comchip)	GBU402-G (Comchip)	GBU602-G (Comchip)	GBU802-G (Comchip)
Voltage - Peak Reverse (Max)	200 V	200 V	200 V	200 V	200 V	200 V
Current - Average Rectified (Io)	6 A	3.8 A	4.2 A	4 A	6 A	8 A
Voltage - Forward (Vf) (Max) @ If	1 V @ 6 A	1 V @ 3 A	1 V @ 12.5 A	1 V @ 2 A	1 V @ 3 A	1 V @ 4 A
Current - Reverse Leakage @ Vr	5 µA @ 200 V	5 µA @ 200 V	10 µA @ 50 V	10 µA @ 200 V	5 µA @ 200 V	10 µA @ 200 V
Operating Temperature	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	4-SIP, KBU	4-SIP, GBU	4-SIP, GBU	4-SIP, GBU	4-SIP, GBU	4-SIP, GBU
Diode Type	Single Phase	Single Phase	Single Phase	Single Phase	Single Phase	Single Phase
Technology	Standard	Standard	Standard	Standard	Standard	Standard
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

GBU602-G (Comchip Technology) is the primary substitute for KBU6D applications. This part matches the 6 A current rating exactly, maintains 200 V peak reverse voltage, and operates across the identical temperature range. GBU602-G holds active product status with ROHS3 compliance and unlimited moisture sensitivity rating, ensuring long-term availability and regulatory alignment.

GBU6D-E3/45 (Vishay General Semiconductor) provides an alternative from a major manufacturer with active product status and ROHS3 compliance. This part operates at 3.8 A average rectified current, suitable for applications with lower current requirements or where thermal margin is prioritized.

GBU802-G (Comchip Technology) accommodates applications requiring higher current capacity at 8 A while maintaining all voltage and temperature specifications. This part is appropriate for designs with increased current demands within the 200 V envelope.

GBU402-G and GBU2502-G are suitable for applications with reduced current requirements at 4 A and 4.2 A respectively, offering cost optimization for lower-power circuits while preserving voltage and thermal performance.

All substitute parts are through-hole mounted in 4-SIP packages, electrically and mechanically compatible with KBU6D footprints. Selection should be based on specific application current requirements and compliance certifications.

Frequently Asked Questions (FAQ)

Q: Can GBU series parts directly replace KBU6D in existing designs?

A: Yes. GBU and KBU series parts are mechanically and electrically interchangeable in 4-SIP through-hole applications. Both package types accommodate identical pin configurations and electrical performance within the specified parameters.

Q: What is the primary difference between KBU6D and GBU602-G?

A: KBU6D is obsolete; GBU602-G is active. Both maintain 200 V peak reverse voltage, 6 A average rectified current, -55°C to 150°C operating temperature, and standard single-phase bridge rectifier topology. GBU602-G includes ROHS3 compliance certification.

Q: Which substitute part should be selected for new designs?

A: GBU602-G is recommended for new designs requiring 6 A current capacity. This part offers active product status, ROHS3 compliance, and exact current rating match to the original KBU6D specification.

Q: Are there current rating differences among substitute parts?

A: Yes. GBU2502-G and GBU402-G are rated at 4.2 A and 4 A respectively. GBU6D-E3/45 is rated at 3.8 A. GBU602-G matches the 6 A rating. GBU802-G provides 8 A capacity. Selection depends on application current requirements.

Q: Do all substitute parts meet the same temperature operating range?

A: Yes. All substitute parts operate across -55°C to 150°C junction temperature, matching the KBU6D specification.

Q: What compliance certifications apply to substitute parts?

A: GBU series parts from Comchip Technology and Vishay General Semiconductor are ROHS3 compliant. All parts are REACH unaffected and classified under ECCN EAR99 with HTSUS code 8541.10.0080.

Q: Is reverse leakage current a critical selection parameter?

A: Reverse leakage varies among substitutes. KBU6D and GBU6D-E3/45 specify 5 µA @ 200 V. GBU402-G and GBU802-G specify 10 µA @ 200 V. GBU2502-G specifies 10 µA @ 50 V. Selection should account for application leakage requirements.

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