Equivalent & Substitute Parts for 3N253 Bridge Rectifier

Part Overview

The 3N253 is a single-phase bridge rectifier manufactured by onsemi, rated for 50 V peak reverse voltage and 2 A average rectified current in a 4-SIP KBPM through-hole package. This component is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility within the specified voltage and current parameters while accommodating available packaging and manufacturer options.

Key Parameters

Parameter	3N253 Specification
Diode Type	Single Phase
Voltage - Peak Reverse (Max)	50 V
Current - Average Rectified (Io)	2 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 3.14 A
Current - Reverse Leakage @ Vr	5 µA @ 50 V
Operating Temperature Range	-55°C to 150°C (TJ)
Mounting Type	Through Hole
Package / Case	4-SIP, KBPM
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the 3N253 is determined by the following critical parameters:

Voltage - Peak Reverse (Max): Must equal or exceed 50 V
Current - Average Rectified (Io): Must equal or exceed 2 A
Diode Type: Must be Single Phase
Mounting Type: Must be Through Hole
Operating Temperature Range: Must accommodate the application's thermal requirements

Substitute parts are grouped into two categories:

Category A - Direct Electrical Equivalents (50 V, 2 A): Parts with identical voltage and current ratings, suitable for direct replacement in existing designs.

Category B - Higher Voltage Rated Parts (>50 V, 2 A): Parts with voltage ratings exceeding 50 V but maintaining 2 A current rating. These are electrically compatible for 50 V applications and provide additional design margin.

Parameter Comparison

Part Number	Manufacturer	Voltage - Peak Reverse (Max)	Current - Average Rectified (Io)	Voltage - Forward (Vf) (Max) @ If	Current - Reverse Leakage @ Vr	Operating Temperature	Package / Case	Product Status
3N253	onsemi	50 V	2 A	1.1 V @ 3.14 A	5 µA @ 50 V	-55°C to 150°C	4-SIP, KBPM	Obsolete
KBP005G	Diodes Incorporated	50 V	1.5 A	1.1 V @ 1.5 A	5 µA @ 50 V	-65°C to 150°C	4-SIP, KBP	Active
KBP2005G	SMC Diode Solutions	50 V	2 A	1.1 V @ 2 A	5 µA @ 50 V	-55°C to 150°C	4-ESIP	Active
VS-2KBP005	Vishay General Semiconductor - Diodes Division	50 V	2 A	1 V @ 1 A	10 µA @ 50 V	-40°C to 150°C	4-SIP, D-44	Active
VS-2KBP02	Vishay General Semiconductor - Diodes Division	200 V	2 A	1 V @ 1 A	10 µA @ 200 V	-40°C to 150°C	4-SIP, D-44	Active
VS-2KBP04	Vishay General Semiconductor - Diodes Division	400 V	2 A	1 V @ 1 A	10 µA @ 400 V	-40°C to 150°C	4-SIP, D-44	Active
VS-2KBP06	Vishay General Semiconductor - Diodes Division	600 V	2 A	1 V @ 1 A	10 µA @ 600 V	-40°C to 150°C	4-SIP, D-44	Active
VS-2KBP08	Vishay General Semiconductor - Diodes Division	800 V	2 A	1 V @ 1 A	10 µA @ 800 V	-40°C to 150°C	4-SIP, D-44	Active
VS-2KBP10	Vishay General Semiconductor - Diodes Division	1 kV	2 A	1 V @ 1 A	10 µA @ 1000 V	-40°C to 150°C	4-SIP, D-44	Active

Engineering Selection Recommendations

Direct Replacement (50 V, 2 A Rating)

KBP2005G (SMC Diode Solutions) and VS-2KBP005 (Vishay) are direct electrical equivalents to the 3N253. Both maintain 50 V peak reverse voltage and 2 A average rectified current specifications. KBP2005G is ROHS3 compliant with REACH affected status. VS-2KBP005 is ROHS3 compliant with REACH unaffected status and offers a wider operating temperature range (-40°C to 150°C). Both parts are active products with established supply availability.

Higher Voltage Rated Alternatives (>50 V, 2 A Rating)

The VS-2KBP series (VS-2KBP02, VS-2KBP04, VS-2KBP06, VS-2KBP08, VS-2KBP10) from Vishay provides 2 A current rating across voltage ratings of 200 V, 400 V, 600 V, 800 V, and 1 kV. These parts are electrically compatible for 50 V applications and are suitable when design requirements include higher voltage margin or when higher voltage rated components are preferred for standardization across product lines. All Vishay VS-2KBP series parts are ROHS3 compliant and REACH unaffected.

Current-Limited Alternative

KBP005G (Diodes Incorporated) is rated for 50 V but with 1.5 A average rectified current, below the 3N253 specification of 2 A. This part is suitable only for applications where the actual current requirement does not exceed 1.5 A. KBP005G is ROHS3 compliant and REACH unaffected, with an extended operating temperature range (-65°C to 150°C).

Frequently Asked Questions (FAQ)

Q: Can KBP005G replace the 3N253 in all applications?

A: KBP005G is rated for 1.5 A average rectified current, while the 3N253 is rated for 2 A. KBP005G is suitable only for applications where the actual rectified current does not exceed 1.5 A. For applications requiring the full 2 A rating, use KBP2005G or VS-2KBP005.

Q: What is the difference between the 4-SIP KBPM package and the 4-SIP D-44 package?

A: Both are 4-pin single in-line packages for through-hole mounting. The KBPM designation is specific to onsemi, while D-44 is the Vishay designation. Physical compatibility depends on PCB footprint design. Verify footprint compatibility before substitution.

Q: Can I use a higher voltage rated part like VS-2KBP06 (600 V) in place of the 3N253 (50 V)?

A: Yes. Higher voltage rated bridge rectifiers are electrically compatible for lower voltage applications. The VS-2KBP06 will function correctly in a 50 V circuit and provides additional voltage margin. This substitution is valid from an electrical standpoint.

Q: Are all substitute parts RoHS compliant?

A: KBP2005G and all Vishay VS-2KBP series parts are ROHS3 compliant. KBP005G is also ROHS3 compliant. Verify RoHS compliance requirements for your specific application and region.

Q: What is the difference in reverse leakage current between the 3N253 and substitute parts?

A: The 3N253 specifies 5 µA @ 50 V reverse leakage. Vishay VS-2KBP series parts specify 10 µA at their respective voltage ratings. KBP005G and KBP2005G specify 5 µA @ 50 V, matching the 3N253. For applications sensitive to reverse leakage, KBP005G or KBP2005G are preferred.

Q: Is the 3N253 still available for purchase?

A: The 3N253 is classified as obsolete. Active substitute parts with equivalent or superior specifications are recommended for new designs and ongoing production.

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