onsemi 3N259 Bridge Rectifier - Equivalent & Substitute Parts

Part Overview

The onsemi 3N259 is a single-phase bridge rectifier rated for 1 kV peak reverse voltage and 2 A average rectified current, housed in a 4-SIP KBPM package for through-hole mounting. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating available packaging options.

Key Parameters

Parameter	Value
Diode Type	Single Phase
Voltage - Peak Reverse (Max)	1 kV
Current - Average Rectified (Io)	2 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 3.14 A
Current - Reverse Leakage @ Vr	5 µA @ 1000 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 eligibility for the 3N259 is determined by the following critical parameters:

Voltage - Peak Reverse (Max): Must equal or exceed 1 kV
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

Parts are grouped into two categories based on these criteria:

Category A - Full Electrical Equivalents (1 kV, 2 A): Parts meeting all primary electrical specifications with active product status and modern compliance certifications.

Category B - Voltage-Reduced Alternatives (50 V to 800 V, 2 A): Parts with lower peak reverse voltage ratings suitable only for applications operating below 1 kV. These are not direct substitutes for 1 kV applications.

Parameter Comparison

Manufacturer 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	RoHS Status
3N259	onsemi	1 kV	2 A	1.1 V @ 3.14 A	5 µA @ 1000 V	-55°C to 150°C	4-SIP, KBPM	Obsolete	Not specified
KBP10G	Diodes Incorporated	1 kV	1.5 A	1.1 V @ 1.5 A	5 µA @ 1000 V	-65°C to 150°C	4-SIP, KBP	Active	ROHS3 Compliant
KBP210G	Diotec Semiconductor	1 kV	1.2 A	1.1 V @ 2 A	5 µA @ 1000 V	-50°C to 150°C	4-SIP, KBP	Active	Not applicable
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	ROHS3 Compliant
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	ROHS3 Compliant
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	ROHS3 Compliant
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	ROHS3 Compliant
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	ROHS3 Compliant
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	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitute - Full Electrical Equivalence:

VS-2KBP10 (Vishay General Semiconductor - Diodes Division) is the recommended primary substitute. It matches the 3N259 across all critical electrical parameters: 1 kV peak reverse voltage and 2 A average rectified current. The part is active, ROHS3 compliant, and available in high inventory. The D-44 package is mechanically compatible with through-hole mounting applications. Operating temperature range (-40°C to 150°C) covers the upper portion of the 3N259 specification.

Secondary Substitutes - Reduced Current Rating:

KBP10G (Diodes Incorporated) and KBP210G (Diotec Semiconductor) both maintain 1 kV voltage rating but have reduced current ratings of 1.5 A and 1.2 A respectively. These are suitable only for applications where the actual load current does not exceed their rated values. Both parts are active and available.

Voltage-Reduced Alternatives:

VS-2KBP08, VS-2KBP06, VS-2KBP04, and VS-2KBP02 maintain the 2 A current rating but operate at reduced voltage levels (800 V, 600 V, 400 V, and 200 V respectively). These parts are suitable only for applications operating below their respective voltage ratings and are not direct substitutes for 1 kV applications.

Frequently Asked Questions (FAQ)

Q: Can KBP10G replace the 3N259 in all applications?

A: KBP10G maintains the 1 kV voltage rating but has a reduced current rating of 1.5 A versus the 3N259's 2 A. It is suitable only for applications where the actual average rectified current does not exceed 1.5 A. Verify your circuit's current requirements before selection.

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

A: Both are 4-SIP through-hole packages. The KBPM is the onsemi designation, while KBP is the industry-standard designation used by Diodes Incorporated, Diotec Semiconductor, and Vishay. They are mechanically compatible for through-hole PCB mounting.

Q: Why is VS-2KBP10 recommended over KBP10G?

A: VS-2KBP10 matches the 3N259's 2 A current rating exactly, whereas KBP10G is rated for 1.5 A. For applications requiring the full 2 A capacity, VS-2KBP10 is the appropriate choice. Both are active products with modern compliance certifications.

Q: Can I use VS-2KBP08 or lower voltage-rated parts as substitutes?

A: No. These parts have peak reverse voltage ratings below 1 kV and are not suitable for 1 kV applications. Using an undersized voltage-rated component risks component failure and circuit damage. Select only parts rated for 1 kV or higher.

Q: What compliance certifications should I verify for my application?

A: The 3N259 does not specify RoHS status. Recommended substitutes VS-2KBP10, KBP10G, and KBP210G all carry ROHS3 compliance or equivalent certifications. Verify that your application requirements align with the selected part's compliance profile before final selection.

Q: Are there any thermal considerations when substituting?

A: The 3N259 operates from -55°C to 150°C. Recommended substitutes operate from -40°C to -65°C minimum. Verify that your application's minimum operating temperature does not fall below the substitute part's lower limit. For applications requiring -55°C operation, confirm the substitute's suitability or consider design modifications.

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