3KP210A-B Equivalent & Substitute Parts

Part Overview

The 3KP210A-B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse, designed for general-purpose transient voltage protection applications. This component features a 210V reverse standoff voltage with a maximum clamping voltage of 349.5V at peak pulse current. The part is classified as obsolete, making identification of suitable substitute components essential for ongoing system maintenance and new design implementations where equivalent protection characteristics are required.

Substiute Parts

3KP210A-B

LittelfuseIn Stock: 11553KP210A-B Datasheet

Current PartRFQ

5KP210A-B

Littelfuse Inc.In Stock: 8925KP210A-B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3KP210A-B is determined by strict alignment of electrical and mechanical parameters. The primary substitute identified is the 5KP210A-B, which maintains identical voltage specifications (210V reverse standoff, 233V breakdown minimum, 349.5V maximum clamping voltage) and mechanical compatibility (P600 axial through-hole package). The key differentiator is the peak pulse current rating: the 5KP210A-B provides 14.6A compared to the 3KP210A-B's 8.6A, resulting in a higher peak pulse power rating of 5000W versus 3000W. Both components operate across the same temperature range (-55°C to 175°C) and maintain ROHS3 compliance. The 5KP210A-B is classified as Active product status, ensuring continued availability and support.

Parameter Comparison

Engineering Selection Recommendations

The 5KP210A-B is the direct substitute for the obsolete 3KP210A-B. Both components share identical voltage protection characteristics and mechanical form factor, ensuring drop-in compatibility in existing circuit designs. The 5KP210A-B's higher peak pulse current and power ratings (14.6A and 5000W respectively) provide enhanced transient suppression capability without compromising the voltage protection profile. The Active product status of the 5KP210A-B ensures long-term availability and manufacturing support. Both components maintain ROHS3 compliance, satisfying regulatory requirements for new designs and legacy system replacements.

Frequently Asked Questions (FAQ)

Q: Can the 5KP210A-B directly replace the 3KP210A-B in existing applications?

A: Yes. Both components feature identical voltage specifications (210V reverse standoff, 349.5V maximum clamping voltage) and the same P600 axial through-hole package. The 5KP210A-B's higher current and power ratings provide equivalent or superior performance in the same physical footprint.

Q: What is the primary difference between the 3KP210A-B and 5KP210A-B?

A: The 5KP210A-B provides higher peak pulse current (14.6A versus 8.6A) and peak pulse power (5000W versus 3000W). Voltage protection characteristics remain identical across both components.

Q: Why is the 3KP210A-B classified as obsolete?

A: The 3KP210A-B has been discontinued by Littelfuse. The 5KP210A-B series represents the current active product line for equivalent voltage protection in the 210V class.

Q: Are there any compliance differences between the two parts?

A: Both components are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited). No compliance barriers exist for substitution.

Q: What mounting considerations apply to substitution?

A: Both the 3KP210A-B and 5KP210A-B use identical P600 axial through-hole packaging. No PCB layout or mounting modifications are required for substitution.