3N252 Bridge Rectifier Equivalent & Substitute Parts

Part Overview

The 3N252 is a single-phase bridge rectifier manufactured by onsemi, rated for 1 kV peak reverse voltage and 1.5 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 support. The 3N252 operates across a temperature range of -55°C to 165°C and is suitable for standard rectification applications requiring 1 kV voltage isolation.

Key Parameters

Parameter	Value
Diode Type	Single Phase
Technology	Standard
Voltage - Peak Reverse (Max)	1 kV
Current - Average Rectified (Io)	1.5 A
Voltage - Forward (Vf) (Max) @ If	1 V @ 1 A
Current - Reverse Leakage @ Vr	5 µA @ 1000 V
Operating Temperature Range	-55°C ~ 165°C (TJ)
Mounting Type	Through Hole
Package / Case	4-SIP, KBPM
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the 3N252 is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - Peak Reverse (Max): 1 kV minimum
Current - Average Rectified (Io): 1.5 A minimum
Diode Type: Single Phase
Technology: Standard
Mounting Type: Through Hole
Package compatibility: 4-SIP form factor

Secondary Considerations:

Operating temperature range must encompass the application requirements
Forward voltage characteristics must be compatible with circuit design
Reverse leakage current specifications must meet application demands

Substitute parts are grouped into two categories based on voltage rating alignment:

Category 1: Direct 1 kV Voltage Rating Match Parts with 1 kV peak reverse voltage rating that maintain or exceed the 1.5 A current specification.

Category 2: Voltage-Rated Alternatives Parts with voltage ratings below 1 kV (50 V, 200 V, 400 V, 600 V, 800 V) are suitable only for applications where the circuit operates at those lower voltage levels. These are not direct substitutes for 1 kV applications.

Parameter Comparison

Part Number	Manufacturer	Voltage - Peak Reverse (Max)	Current - Average Rectified (Io)	Vf (Max) @ If	Reverse Leakage @ Vr	Operating Temperature	Package / Case	Product Status
3N252	onsemi	1 kV	1.5 A	1 V @ 1 A	5 µA @ 1000 V	-55°C ~ 165°C	4-SIP, KBPM	Obsolete
KBP10G	Diodes Incorporated	1 kV	1.5 A	1.1 V @ 1.5 A	5 µA @ 1000 V	-65°C ~ 150°C	4-SIP, KBP	Active
KBP210G	Diotec Semiconductor	1 kV	1.2 A	1.1 V @ 2 A	5 µA @ 1000 V	-50°C ~ 150°C	4-SIP, KBP	Active
VS-2KBP005	Vishay General Semiconductor - Diodes Division	50 V	2 A	1 V @ 1 A	10 µA @ 50 V	-40°C ~ 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 ~ 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 ~ 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 ~ 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 ~ 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 ~ 150°C	4-SIP, D-44	Active

Engineering Selection Recommendations

Primary Substitutes (1 kV Voltage Rating):

KBP10G (Diodes Incorporated) is the most direct substitute for the 3N252. It maintains the 1 kV peak reverse voltage and 1.5 A current rating with active product status. The forward voltage specification of 1.1 V @ 1.5 A is marginally higher than the 3N252 but remains within acceptable engineering tolerances for standard rectification circuits. The operating temperature range of -65°C to 150°C covers the lower end of the 3N252 range but does not extend to the 165°C maximum. This part is suitable for applications where the upper temperature limit does not exceed 150°C.

VS-2KBP10 (Vishay General Semiconductor - Diodes Division) provides a 1 kV rated alternative with enhanced current capacity at 2 A, exceeding the 3N252 requirement. This part offers superior performance margin and active product status with RoHS3 compliance. The operating temperature range of -40°C to 150°C is narrower than the 3N252 but adequate for most industrial applications. The D-44 package differs from the KBPM package, requiring PCB layout verification.

KBP210G (Diotec Semiconductor) operates at 1 kV with 1.2 A average rectified current, which is below the 3N252 specification of 1.5 A. This part is suitable only for applications where the actual current demand does not exceed 1.2 A. The operating temperature range of -50°C to 150°C is narrower than the 3N252.

Voltage-Rated Alternatives (Below 1 kV):

VS-2KBP005, VS-2KBP02, VS-2KBP04, VS-2KBP06, and VS-2KBP08 are suitable substitutes only for applications operating at their respective voltage ratings (50 V, 200 V, 400 V, 600 V, and 800 V). These parts must not be used in circuits requiring 1 kV isolation. All Vishay VS-2KBP series parts feature RoHS3 compliance and active product status.

Compliance and Certification:

KBP10G carries RoHS3 compliance. VS-2KBP series parts (VS-2KBP005, VS-2KBP02, VS-2KBP04, VS-2KBP06, VS-2KBP08, VS-2KBP10) are RoHS3 compliant. All parts listed maintain REACH Unaffected or Vendor Undefined status. The 3N252 is REACH Unaffected.

Frequently Asked Questions (FAQ)

Q: Can KBP10G directly replace the 3N252 in all applications?

A: KBP10G is electrically compatible with the 3N252 for 1 kV applications requiring 1.5 A or less. However, the operating temperature range differs: KBP10G operates to 150°C maximum, while the 3N252 extends to 165°C. Verify that your application does not require operation above 150°C. The package form factor (KBP vs. KBPM) may differ; confirm PCB footprint compatibility.

Q: What is the difference between the KBPM and KBP packages?

A: Both are 4-SIP through-hole packages used for single-phase bridge rectifiers. The KBPM is specific to onsemi, while KBP is the industry-standard designation used by Diodes Incorporated, Diotec Semiconductor, and Vishay. Physical dimensions and pin spacing may vary; consult manufacturer datasheets for exact specifications before PCB layout.

Q: Can I use VS-2KBP10 instead of KBP10G?

A: Yes, VS-2KBP10 is electrically suitable for 1 kV applications. It provides 2 A current capacity, exceeding the 3N252 requirement of 1.5 A. The D-44 package differs from KBPM; verify PCB footprint compatibility. The operating temperature range is -40°C to 150°C, narrower than the 3N252 but adequate for most applications.

Q: Why are VS-2KBP005 through VS-2KBP08 listed if they cannot replace the 3N252?

A: These parts are listed because they are referenced in the 3N252 substitute field and represent the complete VS-2KBP series. They are suitable substitutes only for applications operating at their respective voltage ratings. Do not use these parts in 1 kV circuits.

Q: What is the significance of the forward voltage (Vf) difference between the 3N252 and KBP10G?

A: The 3N252 specifies 1 V @ 1 A, while KBP10G specifies 1.1 V @ 1.5 A. This 0.1 V difference is typical among bridge rectifier variants and generally does not affect circuit performance in standard rectification applications. Verify that your power supply design accommodates this voltage drop.

Q: Are all substitute parts RoHS compliant?

A: KBP10G is RoHS3 compliant. All Vishay VS-2KBP series parts are RoHS3 compliant. The 3N252 is obsolete and predates RoHS requirements. For new designs, RoHS3 compliant alternatives are recommended.

Q: Can I use a higher-rated current part as a substitute?

A: Yes. Parts rated for higher current (such as VS-2KBP10 at 2 A) can substitute for the 3N252 (1.5 A) in the same voltage class. The higher current rating provides additional performance margin without affecting circuit operation. Ensure the voltage rating matches or exceeds the application requirement.

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