3N246 Bridge Rectifier Single Phase 50V 1.5A - Equivalent & Substitute Parts

Part Overview

The 3N246 is a single-phase bridge rectifier manufactured by onsemi, rated for 50 V peak reverse voltage and 1.5 A average rectified current in a through-hole KBPM package. 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	3N246 Specification
Diode Type	Single Phase
Technology	Standard
Voltage - Peak Reverse (Max)	50 V
Current - Average Rectified (Io)	1.5 A
Voltage - Forward (Vf) (Max) @ If	1 V @ 1 A
Current - Reverse Leakage @ Vr	5 µA @ 50 V
Operating Temperature Range	-55°C ~ 165°C (TJ)
Mounting Type	Through Hole
Package / Case	4-SIP, KBPM
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the 3N246 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 1.5 A
Diode Type: Must be Single Phase
Technology: Must be Standard
Mounting Type: Must be Through Hole
Package / Case: Must be compatible 4-SIP variant

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

Category A - Direct Current Match (1.5 A): KBP005G maintains the exact 1.5 A rating with 50 V specification, offering the closest electrical equivalence.

Category B - Higher Current Rating (2 A): KBP2005G, VS-2KBP005, VS-2KBP02, VS-2KBP04, VS-2KBP06, VS-2KBP08, and VS-2KBP10 provide 2 A or greater current capacity. These parts are electrically compatible for applications requiring the 3N246's 1.5 A specification, as higher current ratings do not compromise circuit function in lower-current applications. Voltage ratings vary across this group (50 V to 1 kV), allowing selection based on circuit requirements.

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
3N246	onsemi	50 V	1.5 A	1 V @ 1 A	5 µA @ 50 V	-55°C ~ 165°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 ~ 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 ~ 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 ~ 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 Substitute - KBP005G (Diodes Incorporated)

KBP005G is the optimal direct replacement for the 3N246. It matches the 50 V and 1.5 A specifications exactly, maintains single-phase standard technology, and is in active production status. The part is RoHS3 compliant and REACH unaffected. The forward voltage specification (1.1 V @ 1.5 A) is marginally higher than the 3N246 (1 V @ 1 A) but remains within acceptable engineering tolerance for bridge rectifier applications. The operating temperature range (-65°C ~ 150°C) covers the 3N246's lower bound but does not extend to the 165°C maximum; thermal design review is required if the application approaches 150°C.

Secondary Substitutes - VS-2KBP Series (Vishay)

The VS-2KBP005, VS-2KBP02, VS-2KBP04, VS-2KBP06, VS-2KBP08, and VS-2KBP10 are all active, RoHS3 compliant alternatives. All feature 2 A current capacity, exceeding the 3N246's 1.5 A requirement. Voltage ratings range from 50 V to 1 kV, allowing selection based on circuit overvoltage protection requirements. The D-44 package is mechanically compatible with through-hole mounting. Operating temperature range (-40°C ~ 150°C) does not reach the 3N246's 165°C maximum. These parts are suitable when higher voltage ratings or enhanced current margin are required.

Alternative - KBP2005G (SMC Diode Solutions)

KBP2005G provides 50 V and 2 A specifications with RoHS3 compliance. The 4-ESIP package differs from the KBPM standard but maintains through-hole mounting compatibility. REACH status is affected, requiring compliance verification in regulated applications. This part is suitable for designs where REACH compliance is not a constraint.

Frequently Asked Questions (FAQ)

Q: Can KBP005G directly replace the 3N246 without circuit modification?

A: Yes. KBP005G matches the 3N246's 50 V and 1.5 A specifications and maintains single-phase standard bridge rectifier topology. Both parts use 4-SIP through-hole packages. The forward voltage difference (1.1 V vs. 1 V) is negligible in most rectifier applications. Verify that the application's maximum operating temperature does not exceed 150°C, as KBP005G's upper thermal limit is 150°C compared to the 3N246's 165°C.

Q: Why are VS-2KBP parts with higher voltage ratings (200 V, 400 V, 600 V, 800 V, 1 kV) listed as substitutes for a 50 V part?

A: Bridge rectifiers with higher voltage ratings are electrically compatible with lower-voltage applications. The 50 V specification defines the maximum reverse voltage the 3N246 can withstand; a 200 V or 600 V rated part will function correctly in a 50 V circuit. Higher voltage ratings provide additional overvoltage protection margin and are suitable when circuit transients or design margin are considerations. Current capacity (2 A) exceeds the 3N246's 1.5 A requirement, ensuring adequate performance.

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

A: Both KBPM and KBP are 4-SIP (Single In-line Package) through-hole configurations used for bridge rectifiers. The designations reflect manufacturer-specific naming conventions. Physical dimensions and pin spacing are compatible, allowing mechanical interchangeability in standard PCB layouts. Verify footprint compatibility with your specific PCB design.

Q: Is the D-44 package used by Vishay parts compatible with the 3N246's KBPM package?

A: D-44 is Vishay's designation for a 4-SIP through-hole package. While the package type is the same (4-SIP), physical dimensions may vary slightly between manufacturers. Mechanical compatibility must be verified against your PCB footprint. If your design uses a standard 4-SIP footprint, D-44 parts are typically compatible; however, consult the specific datasheet dimensions if space constraints exist.

Q: Which substitute part has the widest operating temperature range?

A: The 3N246 itself specifies -55°C ~ 165°C. Among active substitutes, KBP005G extends to -65°C on the lower bound but reaches only 150°C on the upper bound. The VS-2KBP series (VS-2KBP005, VS-2KBP02, VS-2KBP04, VS-2KBP06, VS-2KBP08, VS-2KBP10) all specify -40°C ~ 150°C. If your application requires operation above 150°C, thermal design review is necessary, as no listed substitute fully matches the 3N246's 165°C maximum.

Q: Are all substitute parts RoHS3 compliant?

A: KBP005G, KBP2005G, and all VS-2KBP parts are RoHS3 compliant. The 3N246 (obsolete) does not carry RoHS certification. If your application requires RoHS compliance, all listed active substitutes meet this requirement.

Q: What is the significance of REACH status in the substitute parts list?

A: REACH status indicates regulatory compliance under the European Union's Registration, Evaluation, Authorization and Restriction of Chemicals regulation. KBP005G and all VS-2KBP parts are either REACH unaffected or REACH compliant. KBP2005G is REACH affected, requiring additional compliance verification if the application is subject to EU regulations. For non-EU applications, REACH status is not a constraint.

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