3N250 Bridge Rectifier Single Phase 600V 1.5A - Equivalent & Substitute Parts

Part Overview

The 3N250 is a single-phase bridge rectifier manufactured by onsemi, rated for 600V peak reverse voltage and 1.5A average rectified current in a 4-SIP KBPM through-hole package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain compatibility across voltage rating, current capacity, forward voltage characteristics, and through-hole mounting configuration.

Key Parameters

Parameter	3N250 Specification
Diode Type	Single Phase Bridge Rectifier
Voltage - Peak Reverse (Max)	600 V
Current - Average Rectified (Io)	1.5 A
Voltage - Forward (Vf) (Max) @ If	1 V @ 1 A
Current - Reverse Leakage @ Vr	5 µA @ 600 V
Operating Temperature Range	-55°C ~ 165°C (TJ)
Mounting Type	Through Hole
Package / Case	4-SIP, KBPM
Technology	Standard
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the 3N250 are evaluated based on the following critical parameters:

Voltage Rating Compatibility: Peak reverse voltage must equal or exceed 600V to maintain circuit protection and reliability
Current Rating: Average rectified current must support or exceed 1.5A application requirements
Forward Voltage Characteristics: Forward voltage drop at rated current determines power dissipation and thermal performance
Reverse Leakage: Leakage current at rated voltage indicates diode quality and long-term reliability
Mounting Configuration: Through-hole package requirement for PCB compatibility
Temperature Range: Operating temperature limits must accommodate application environment

Substitute parts are grouped into two categories:

Category A - Direct Electrical Equivalents (600V, 1.5A minimum): Parts meeting or exceeding the 3N250 electrical specifications with compatible through-hole packaging.

Category B - Higher Current Capability (600V, 2A): Parts with increased current capacity suitable for applications requiring additional margin or future design flexibility, maintaining 600V voltage rating.

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
3N250	onsemi	600 V	1.5 A	1 V @ 1 A	5 µA @ 600 V	-55°C ~ 165°C	4-SIP, KBPM	Obsolete
KBP06G	Diodes Incorporated	600 V	1.5 A	1.1 V @ 1.5 A	5 µA @ 600 V	-65°C ~ 150°C	4-SIP, KBP	Active
KBP206G	Diotec Semiconductor	600 V	1.2 A	1.1 V @ 2 A	5 µA @ 600 V	-50°C ~ 150°C	4-SIP, KBP	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

Engineering Selection Recommendations

Primary Substitute - KBP06G (Diodes Incorporated)

The KBP06G provides the closest electrical match to the 3N250 with identical 600V/1.5A ratings and equivalent reverse leakage characteristics. This part is in active production status with RoHS3 compliance. The forward voltage specification of 1.1V @ 1.5A represents a 0.1V increase compared to the 3N250, resulting in minimal additional power dissipation. The operating temperature range of -65°C to 150°C covers most industrial applications, though the upper limit is 15°C lower than the original part. This substitute is recommended for direct replacement in new designs and production transitions.

Secondary Substitute - VS-2KBP06 (Vishay General Semiconductor - Diodes Division)

The VS-2KBP06 offers increased current capacity at 2A while maintaining 600V voltage rating, providing design margin for applications with potential current growth. Forward voltage characteristics match the 3N250 specification at 1V @ 1A. This part is in active production with RoHS3 compliance and REACH compliance confirmation. The D-44 package maintains through-hole compatibility. The operating temperature range of -40°C to 150°C is suitable for standard industrial environments. This substitute is appropriate for applications requiring higher current headroom or where thermal margin is beneficial.

Alternative Substitute - KBP206G (Diotec Semiconductor)

The KBP206G maintains 600V voltage rating with 1.2A average rectified current, providing modest current margin above the 3N250 requirement. This part is in active production status. The forward voltage specification of 1.1V @ 2A indicates slightly higher power dissipation than the original part. RoHS compliance status is not applicable per manufacturer specification. This substitute is suitable for applications where component availability from Diotec is preferred or where the 1.2A rating provides adequate margin.

Frequently Asked Questions (FAQ)

Q: Can the KBP06G directly replace the 3N250 without circuit modifications?

A: Yes. The KBP06G maintains identical 600V and 1.5A electrical ratings with equivalent reverse leakage characteristics. The 0.1V increase in forward voltage drop is within typical circuit tolerance margins and does not require design changes. The 4-SIP KBP package is mechanically compatible with through-hole PCB layouts designed for the KBPM package.

Q: What is the impact of the forward voltage difference between 3N250 (1V @ 1A) and KBP06G (1.1V @ 1.5A)?

A: The 0.1V difference represents approximately 10% additional voltage drop at rated current. In a 1.5A application, this translates to approximately 0.15W additional power dissipation. This increase is typically negligible in bridge rectifier applications and does not require thermal redesign for standard industrial environments.

Q: Why is the 3N250 classified as obsolete?

A: Obsolete status indicates the manufacturer (onsemi) has discontinued production. Substitute parts from active manufacturers (Diodes Incorporated, Vishay, Diotec) provide equivalent or superior electrical performance with ongoing production support and compliance certifications.

Q: Are there voltage rating options below 600V for lower-voltage applications?

A: Yes. The VS-2KBP series includes lower voltage ratings (VS-2KBP02 at 200V, VS-2KBP04 at 400V, VS-2KBP05 at 50V) for applications not requiring 600V capability. These parts maintain the same 2A current capacity and D-44 package configuration. Selection should be based on actual circuit voltage requirements to optimize cost and thermal performance.

Q: What is the difference between the KBPM and KBP package designations?

A: Both KBPM and KBP are 4-SIP through-hole package configurations for single-phase bridge rectifiers. The designations reflect different manufacturer conventions (onsemi uses KBPM, while Diodes Incorporated and Diotec use KBP). The physical dimensions and PCB footprints are compatible for standard through-hole applications.

Q: Does the VS-2KBP06 2A rating provide advantages over the 1.5A 3N250?

A: The VS-2KBP06 2A rating provides 33% additional current capacity, offering design margin for applications with potential current growth or thermal stress reduction at nominal operating current. At 1.5A operation, the 2A-rated device operates at 75% of maximum rating, improving reliability and extending component life compared to operation at 100% rating.

Q: Are all substitute parts RoHS compliant?

A: KBP06G and VS-2KBP06 are confirmed RoHS3 compliant. KBP206G RoHS compliance status is listed as not applicable per manufacturer specification. Verify RoHS compliance requirements for your specific application before final part selection.

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