Equivalent & Substitute Parts for KBU35005-G

Part Overview

The KBU35005-G is a single-phase bridge rectifier diode manufactured by Comchip Technology, rated for 50 V peak reverse voltage and 35 A average rectified current. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design considerations. The KBU35005-G operates across a temperature range of -55°C to 150°C and is housed in a 4-SIP KBU package with through-hole mounting. ROHS3 compliance and unlimited moisture sensitivity level (MSL 1) are standard for this product category.

Key Parameters

Parameter	Value
Manufacturer Part Number	KBU35005-G
Manufacturer	Comchip Technology
Diode Type	Single Phase
Voltage - Peak Reverse (Max)	50 V
Current - Average Rectified (Io)	35 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 17.5 A
Current - Reverse Leakage @ Vr	10 µA @ 50 V
Operating Temperature Range	-55°C ~ 150°C (TJ)
Mounting Type	Through Hole
Package / Case	4-SIP, KBU
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the KBU35005-G is determined by the following critical parameters: voltage rating (50 V peak reverse), diode type (single phase), mounting type (through hole), and operating temperature range (-55°C to 150°C). Current rating is a secondary consideration; substitute parts with lower current ratings (4 A to 10 A) are functionally compatible in applications where the full 35 A capacity is not required. All substitute parts maintain the same voltage specification, technology (standard), and thermal operating range. Forward voltage characteristics and reverse leakage current remain consistent across the substitute group, ensuring electrical compatibility within the specified parameter envelope.

Parameter Comparison

Parameter	KBU35005-G	GBU10005	GBU4005	GBU4A	GBU4A-BP	GBU6005	GBU6A-BP	GBU8005	GBU8A	GBU8A-BP
Voltage - Peak Reverse (Max)	50 V	50 V	50 V	50 V	50 V	50 V	50 V	50 V	50 V	50 V
Current - Average Rectified (Io)	35 A	10 A	4 A	3 A	4 A	6 A	6 A	8 A	5.6 A	8 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 17.5 A	1.1 V @ 10 A	1.1 V @ 4 A	1 V @ 2 A	1 V @ 2 A	1.1 V @ 6 A	1 V @ 3 A	1.1 V @ 8 A	1 V @ 8 A	1 V @ 4 A
Current - Reverse Leakage @ Vr	10 µA @ 50 V	5 µA @ 50 V	5 µA @ 50 V	5 µA @ 50 V	5 µA @ 50 V	5 µA @ 50 V	5 µA @ 50 V	5 µA @ 50 V	5 µA @ 50 V	5 µA @ 50 V
Operating Temperature Range	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-50°C ~ 150°C	-55°C ~ 150°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	4-SIP, KBU	4-ESIP	4-ESIP	4-SIP, GBU	4-SIP, GBU	4-ESIP	4-SIP, GBU	4-ESIP	4-ESIP, GBU	4-SIP, GBU
Product Status	Obsolete	Active	Active	Active	Not For New Designs	Active	Not For New Designs	Active	Active	Not For New Designs
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Not specified	ROHS3 Compliant

Engineering Selection Recommendations

For new designs, select from parts with Active product status: GBU10005, GBU4005, GBU4A, GBU6005, GBU8005, or GBU8A. These components ensure long-term availability and manufacturer support. GBU10005 provides the highest current rating (10 A) among active substitutes and is suitable for applications requiring moderate current capacity. GBU8005 and GBU8A offer 8 A and 5.6 A ratings respectively, with GBU8A providing the lowest forward voltage at 1 V @ 8 A. For legacy system maintenance where the KBU35005-G must be replaced, GBU4A-BP, GBU6A-BP, and GBU8A-BP are available but marked as Not For New Designs; these are suitable only for direct replacement in existing applications. All substitute parts maintain ROHS3 compliance and unlimited moisture sensitivity level, ensuring regulatory alignment with the original component.

Frequently Asked Questions (FAQ)

Q: Can GBU10005 directly replace KBU35005-G in all applications?

A: GBU10005 is electrically compatible within the 50 V voltage specification and single-phase diode type. However, GBU10005 is rated for 10 A average rectified current compared to KBU35005-G's 35 A rating. Substitution is valid only in applications where the actual current demand does not exceed 10 A. Package differences (4-ESIP vs. 4-SIP KBU) require PCB layout verification.

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

A: Both GBU and KBU are 4-pin single-phase bridge rectifier packages with through-hole mounting. The primary difference is the physical form factor: KBU uses a 4-SIP configuration while GBU variants use either 4-SIP or 4-ESIP configurations. Electrical performance is equivalent; mechanical fit on the PCB must be verified before substitution.

Q: Why are some substitute parts marked "Not For New Designs"?

A: Parts marked "Not For New Designs" (GBU4A-BP, GBU6A-BP, GBU8A-BP) are available for legacy system support and direct replacement of existing components. These parts are suitable for maintenance and repair of installed systems but should not be selected for new product development. Active status parts are recommended for all new designs.

Q: Are all substitute parts ROHS3 compliant?

A: All substitute parts listed are ROHS3 compliant except GBU8A, for which RoHS status is not specified in the provided data. Verify RoHS compliance with the manufacturer before selecting GBU8A for applications with regulatory RoHS requirements.

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

A: KBU35005-G specifies 10 µA @ 50 V reverse leakage, while all substitute parts specify 5 µA @ 50 V. Lower reverse leakage in substitute parts indicates improved performance characteristics. This difference does not prevent substitution; it represents an enhancement in electrical performance.

Q: Can lower-rated current parts (4 A, 6 A, 8 A) be used in place of the 35 A KBU35005-G?

A: Lower-rated substitutes are valid only if the application's actual current demand is within the substitute part's rating. For example, GBU8005 (8 A) can replace KBU35005-G only in circuits drawing 8 A or less. Exceeding the substitute part's current rating will cause component failure. Verify actual circuit current requirements before substitution.

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