3KP210-B Equivalent & Substitute Parts

Part Overview

The 3KP210-B is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse, designed for general-purpose transient voltage protection applications. This component features a 210V reverse standoff voltage rating and a 366.98V maximum clamping voltage with 8.6A peak pulse current capability in a through-hole P600 axial package.

The 3KP210-B is classified as obsolete. Identifying suitable substitute components ensures design continuity and maintains supply chain reliability for applications requiring equivalent transient voltage suppression performance.

Substiute Parts

3KP210-B

LittelfuseIn Stock: 9273KP210-B Datasheet

Current PartRFQ

5KP210A-B

Littelfuse Inc.In Stock: 8925KP210A-B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3KP210-B is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): 210V
• Voltage - Clamping (Max) @ Ipp: Must be compatible with circuit protection requirements
• Current - Peak Pulse (10/1000µs): Must meet or exceed application demands
• Power - Peak Pulse: Must support transient energy dissipation
• Mounting Type: Through Hole
• Package / Case: P600, Axial
• Operating Temperature Range: -55°C ~ 175°C (TJ)

The 5KP210A-B qualifies as a direct substitute based on matching reverse standoff voltage (210V), identical mounting type (Through Hole), identical package (P600, Axial), and identical operating temperature range. The 5KP210A-B provides enhanced performance with higher peak pulse current (14.6A) and greater peak pulse power (5000W), making it suitable for applications requiring equal or greater transient protection capability.

Parameter Comparison

Engineering Selection Recommendations

The 5KP210A-B is the primary substitute for the obsolete 3KP210-B. Both components share identical reverse standoff voltage, mounting type, package configuration, and operating temperature range. The 5KP210A-B maintains active product status with ROHS3 compliance, ensuring continued availability and regulatory alignment.

The 5KP210A-B provides superior transient energy handling with 14.6A peak pulse current and 5000W peak pulse power compared to the 3KP210-B specifications of 8.6A and 3000W respectively. The clamping voltage of the 5KP210A-B (349.5V) is lower than the 3KP210-B (366.98V), resulting in improved voltage regulation during transient events.

Selection of the 5KP210A-B is appropriate for applications where the 3KP210-B was originally specified, with the understanding that enhanced performance characteristics provide additional design margin.

Frequently Asked Questions (FAQ)

Q: Can the 5KP210A-B directly replace the 3KP210-B in existing designs?

A: Yes. Both components share identical reverse standoff voltage (210V), mounting type (Through Hole), package (P600, Axial), and operating temperature range (-55°C ~ 175°C). The 5KP210A-B provides enhanced performance with higher peak pulse current and power ratings.

Q: What is the significance of the different clamping voltages between these parts?

A: The 3KP210-B has a maximum clamping voltage of 366.98V, while the 5KP210A-B is rated at 349.5V. The lower clamping voltage of the 5KP210A-B provides more effective voltage suppression during transient events, which is beneficial for circuit protection.

Q: Are both components RoHS compliant?

A: Yes. Both the 3KP210-B and 5KP210A-B are ROHS3 compliant, meeting environmental and regulatory requirements for electronic component manufacturing.

Q: Why is the 3KP210-B classified as obsolete?

A: The 3KP210-B has reached end-of-life status. The 5KP210A-B remains in active production and serves as the recommended substitute for new designs and component replacement.

Q: Are there any package or pinout differences between these components?

A: No. Both components use the P600 axial through-hole package with identical mechanical and electrical interface characteristics.