onsemi 3N255 Bridge Rectifier — Equivalent & Substitute Parts

Part Overview

The onsemi 3N255 is a single-phase bridge rectifier rated for 200 V peak reverse voltage and 2 A average rectified current in a 4-SIP KBPM through-hole package. This part is classified as obsolete. Due to its discontinued status, equivalent and substitute bridge rectifiers from active manufacturers are necessary for new designs and ongoing production support.

Key Parameters

Parameter	Value
Diode Type	Single Phase Bridge Rectifier
Voltage - Peak Reverse (Max)	200 V
Current - Average Rectified (Io)	2 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 3.14 A
Current - Reverse Leakage @ Vr	5 µA @ 200 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 3N255 is determined by the following electrical and mechanical parameters:

Voltage Rating: Peak reverse voltage must be 200 V or higher
Current Rating: Average rectified current must be 2 A or higher
Diode Type: Single-phase bridge rectifier only
Mounting: Through-hole configuration required
Package Compatibility: Physical form factor must accommodate 4-SIP or equivalent through-hole footprint

Substitute parts are grouped into two categories:

Category A — Direct Electrical Match (200 V, 2 A) Parts with identical voltage and current ratings, suitable for direct replacement in existing designs.

Category B — Higher Voltage Rating (200 V+, 2 A) Parts with voltage ratings exceeding 200 V but maintaining 2 A current capacity. These are electrically compatible for 200 V applications and provide additional design margin.

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
3N255	onsemi	200 V	2 A	1.1 V @ 3.14 A	5 µA @ 200 V	-55°C to 150°C	4-SIP, KBPM	Obsolete
KBP02G	Diodes Incorporated	200 V	1.5 A	1.1 V @ 1.5 A	5 µA @ 200 V	-65°C to 150°C	4-SIP, KBP	Active
KBP202G	SMC Diode Solutions	200 V	2 A	1.1 V @ 2 A	5 µA @ 200 V	-55°C to 150°C	4-ESIP	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
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

Engineering Selection Recommendations

Primary Substitutes (Direct Replacement)

KBP202G (SMC Diode Solutions) and VS-2KBP02 (Vishay) are the preferred substitutes. Both maintain the 200 V / 2 A electrical specification of the 3N255. KBP202G is ROHS3 compliant and carries active product status. VS-2KBP02 is ROHS3 compliant with active status and offers extended lower operating temperature range (-40°C vs. -55°C minimum).

Secondary Substitutes (Higher Voltage Rating)

VS-2KBP04, VS-2KBP06, VS-2KBP08, and VS-2KBP10 provide 2 A current capacity at 400 V, 600 V, 800 V, and 1 kV ratings respectively. These are electrically suitable for 200 V applications and are ROHS3 compliant with active product status. Selection depends on circuit voltage margin requirements.

Not Recommended

KBP02G (Diodes Incorporated) has a reduced current rating of 1.5 A, which is below the 2 A specification of the 3N255. VS-2KBP005 (Vishay) has a 50 V rating, which is insufficient for 200 V applications.

Frequently Asked Questions (FAQ)

Q: Can KBP02G replace the 3N255?

A: KBP02G is not recommended. While it matches the 200 V voltage rating, its 1.5 A current specification is below the 3N255's 2 A rating. Applications requiring full 2 A capacity will be undersized.

Q: What is the difference between KBP202G and VS-2KBP02?

A: Both are 200 V / 2 A bridge rectifiers with active product status and ROHS3 compliance. KBP202G uses a 4-ESIP package, while VS-2KBP02 uses a 4-SIP D-44 package. Footprint compatibility with the original KBPM package must be verified during layout review.

Q: Can I use VS-2KBP06 (600 V) instead of the 3N255 (200 V)?

A: Yes. VS-2KBP06 maintains the 2 A current rating and exceeds the 200 V voltage requirement. Higher voltage ratings provide additional design margin and are electrically compatible with 200 V circuits. Package footprint compatibility must be confirmed.

Q: What is the operating temperature difference between the 3N255 and substitute parts?

A: The 3N255 operates from -55°C to 150°C. KBP02G extends the lower limit to -65°C. Vishay VS-2KBP series parts operate from -40°C to 150°C, which is narrower at the lower end. Application temperature requirements must be verified.

Q: Are all substitute parts RoHS compliant?

A: KBP202G and all Vishay VS-2KBP series parts are ROHS3 compliant. KBP02G is also ROHS3 compliant. All listed substitutes meet current RoHS requirements.

Q: What package considerations apply to substitution?

A: The 3N255 uses a 4-SIP KBPM package. KBP202G uses 4-ESIP, and Vishay parts use 4-SIP D-44. Physical dimensions and pin spacing must be verified against PCB layout before final selection. Through-hole mounting is maintained across all substitutes.

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