Equivalent & Substitute Parts for 3KBP04M-E4/51

Part Overview

The 3KBP04M-E4/51 is a single-phase bridge rectifier manufactured by Vishay General Semiconductor - Diodes Division, rated for 400 V peak reverse voltage and 3 A average rectified current. This component is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements. The part is housed in a 4-SIP KBPM package and is suitable for through-hole mounting applications requiring standard rectification technology.

Key Parameters

Parameter	Value
Diode Type	Single Phase
Technology	Standard
Voltage - Peak Reverse (Max)	400 V
Current - Average Rectified (Io)	3 A
Voltage - Forward (Vf) (Max)	1.05 V @ 3 A
Current - Reverse Leakage @ Vr	5 µA @ 400 V
Operating Temperature Range	-55°C ~ 150°C (TJ)
Mounting Type	Through Hole
Package / Case	4-SIP, KBPM
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 3KBP04M-E4/51 is determined by the following critical parameters:

Voltage Rating: Peak reverse voltage must be 400 V or higher
Current Rating: Average rectified current must meet or exceed 3 A
Diode Type: Single-phase bridge rectifier configuration
Technology: Standard rectification technology
Mounting: Through-hole package compatibility
Reverse Leakage: Maximum 5 µA @ 400 V
Temperature Range: Operating range must encompass -55°C to 150°C

The substitute parts listed below satisfy these electrical and mechanical requirements within the allowed parameter tolerances for bridge rectifier diodes.

Parameter Comparison

Parameter	3KBP04M-E4/51	GBL04-E3/51	KBP04G	KBP204G
Manufacturer	Vishay General Semiconductor	Vishay General Semiconductor	Diodes Incorporated	SMC Diode Solutions
Diode Type	Single Phase	Single Phase	Single Phase	Single Phase
Voltage - Peak Reverse (Max)	400 V	400 V	400 V	400 V
Current - Average Rectified (Io)	3 A	3 A	1.5 A	2 A
Voltage - Forward (Vf) (Max)	1.05 V @ 3 A	1.1 V @ 4 A	1.1 V @ 1.5 A	1.1 V @ 2 A
Current - Reverse Leakage @ Vr	5 µA @ 400 V	5 µA @ 400 V	5 µA @ 400 V	5 µA @ 400 V
Operating Temperature Range	-55°C ~ 150°C	-55°C ~ 150°C	-65°C ~ 150°C	-55°C ~ 150°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	4-SIP, KBPM	4-SIP, GBL	4-SIP, KBP	4-ESIP, KBP
Product Status	Obsolete	Discontinued at DiGi Electronics	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

GBL04-E3/51 (Vishay General Semiconductor): This part maintains identical voltage and current ratings to the 3KBP04M-E4/51 with matching temperature range and RoHS3 compliance. The GBL package variant provides direct functional equivalence. However, this part is discontinued at DiGi Electronics, limiting long-term availability.

KBP04G (Diodes Incorporated): This active product offers 400 V peak reverse voltage with ROHS3 compliance and an extended lower temperature operating range (-65°C vs. -55°C). The current rating is 1.5 A, which is below the 3 A requirement of the original part. This substitute is suitable only for applications where the actual load current does not exceed 1.5 A.

KBP204G (SMC Diode Solutions): This active product provides 400 V peak reverse voltage and 2 A average rectified current with ROHS3 compliance. The current rating of 2 A falls short of the original 3 A specification. This substitute is suitable only for applications where the actual load current does not exceed 2 A. REACH status is affected for this part.

For applications requiring the full 3 A current capacity, GBL04-E3/51 is the only direct equivalent. For reduced-current applications, KBP204G (2 A) or KBP04G (1.5 A) may be considered based on actual circuit requirements and availability constraints.

Frequently Asked Questions (FAQ)

Q: Can KBP04G or KBP204G be used as direct replacements for the 3KBP04M-E4/51?

A: No. Both KBP04G (1.5 A) and KBP204G (2 A) have lower current ratings than the original 3 A specification. They are suitable only if your circuit operates at or below their respective current ratings. For full 3 A operation, use GBL04-E3/51.

Q: What is the difference between the KBPM, GBL, and KBP package variants?

A: All three are 4-SIP through-hole packages with identical electrical pin configurations for single-phase bridge rectifiers. The package designation reflects the manufacturer's naming convention. Physical dimensions may vary slightly; verify PCB footprint compatibility before substitution.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitutes (GBL04-E3/51, KBP04G, and KBP204G) are ROHS3 compliant. KBP204G has affected REACH status; verify compliance requirements for your application.

Q: Why is the 3KBP04M-E4/51 marked as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. Equivalent parts from other manufacturers or variant packages (such as GBL04-E3/51) are available to fulfill the same functional role in new designs.

Q: What is the temperature operating range difference between substitutes?

A: The 3KBP04M-E4/51 and most substitutes operate from -55°C to 150°C. KBP04G extends the lower limit to -65°C, providing a wider temperature range for applications requiring enhanced cold-temperature performance.

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