3KP10A-B Transient Voltage Suppressor Equivalent & Substitute Parts

Part Overview

The 3KP10A-B is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This component features a 10V reverse standoff voltage with 17V maximum clamping voltage and 176.5A peak pulse current capability in a through-hole P600 axial package. The product is currently obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

3KP10A-B

Littelfuse Inc.In Stock: 8183KP10A-B Datasheet

Current PartRFQ

5KP10A-B

Littelfuse Inc.In Stock: 7405KP10A-B Datasheet

DirectRFQ

3KP10A-TP

Micro Commercial CoIn Stock: 9253KP10A-TP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3KP10A-B is determined by strict equivalence across the following critical electrical and mechanical parameters:

• Voltage - Reverse Standoff (Typ): 10V
• Voltage - Breakdown (Min): 11.1V
• Voltage - Clamping (Max) @ Ipp: 17V
• Operating Temperature: -55°C ~ 175°C (TJ)
• Mounting Type: Through Hole
• Unidirectional Channels: 1
• Type: Zener

Substitute parts must maintain identical voltage specifications and thermal operating range. Peak pulse current and power ratings may vary provided the substitute meets or exceeds the original specification. Package variations (P600 vs. R-6) are acceptable when mechanical fit permits board-level integration.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts maintain electrical equivalence with the 3KP10A-B across all critical voltage and thermal parameters.

5KP10A-B (Littelfuse Inc.): This substitute is manufactured by the original equipment supplier and carries Active product status. It provides enhanced peak pulse current (300A) and power dissipation (5000W) compared to the original specification, offering improved margin for transient protection. The component maintains identical package geometry (P600, Axial) and ROHS3 compliance certification. This option is recommended for applications requiring direct mechanical and electrical compatibility with minimal design modification.

3KP10A-TP (Micro Commercial Co): This substitute maintains exact electrical specifications matching the original part (176.5A peak pulse current, 3000W power dissipation) and thermal operating range. The component uses an R-6 axial package variant instead of P600, requiring verification of mechanical fit within the target application. Product status is Active with REACH compliance documented. This option is suitable for applications where package footprint variation is acceptable.

Frequently Asked Questions (FAQ)

Q: Can 5KP10A-B be used as a direct replacement for 3KP10A-B?

A: Yes. The 5KP10A-B maintains identical voltage specifications (10V standoff, 17V clamping) and operating temperature range (-55°C to 175°C). The identical P600 axial package permits direct mechanical substitution. The higher peak pulse current (300A vs. 176.5A) and power rating (5000W vs. 3000W) provide additional protection margin without compromising circuit function.

Q: What is the difference between P600 and R-6 packages?

A: Both are through-hole axial packages for TVS diodes. P600 and R-6 represent different package designations with potentially different physical dimensions. Mechanical fit verification is required when substituting between these package types to ensure compatibility with existing PCB layouts and component spacing.

Q: Are all substitute parts ROHS3 compliant?

A: The 5KP10A-B is explicitly ROHS3 compliant. The 3KP10A-TP RoHS status is not specified in the provided data. Compliance verification should be obtained from the manufacturer if ROHS3 certification is a system requirement.

Q: Can substitute parts be used interchangeably in the same circuit?

A: Yes, provided the application circuit can accommodate the package variant. Both substitutes maintain the critical electrical parameters (voltage standoff, breakdown voltage, clamping voltage, and operating temperature) that determine TVS diode function in overvoltage protection circuits. Peak pulse current and power rating differences do not prevent interchangeability; they represent performance enhancements.

Q: What should be verified before implementing a substitute part?

A: Verify mechanical fit of the package variant within the PCB layout, confirm compliance certifications meet system requirements, and validate that the substitute part is available in required quantities and lead times for production schedules.