3KP210C-B Equivalent & Substitute Parts

Part Overview

The 3KP210C-B is a Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection applications. This bidirectional zener diode features a 210V reverse standoff voltage and 366.98V maximum clamping voltage with 8.6A peak pulse current capability. The part is currently 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

3KP210C-B

Littelfuse Inc.In Stock: 8483KP210C-B Datasheet

Current PartRFQ

5KP210CA-B

Littelfuse Inc.In Stock: 11205KP210CA-B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3KP210C-B is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Voltage - Reverse Standoff (Typ): Must match 210V
• Voltage - Clamping (Max) @ Ipp: Must be equal to or lower than 366.98V to ensure adequate transient suppression
• Current - Peak Pulse (10/1000µs): Must meet or exceed 8.6A
• Power - Peak Pulse: Must support minimum 3000W (3kW)
• Bidirectional Channels: Must be 1 (single channel)
• Type: Must be Zener diode

Mechanical Compatibility Criteria:

• Mounting Type: Through Hole
• Package / Case: P600, Axial
• Operating Temperature Range: Must encompass -55°C ~ 175°C (TJ)

Compliance Requirements:

• RoHS Status: ROHS3 Compliant

The 5KP210CA-B meets all substitution criteria with enhanced performance characteristics while maintaining identical mechanical and thermal specifications.

Parameter Comparison

Engineering Selection Recommendations

The 5KP210CA-B is a direct substitute for the obsolete 3KP210C-B. Both components share identical mechanical specifications (P600 axial through-hole package), thermal operating range (-55°C ~ 175°C), and core electrical parameters (210V reverse standoff voltage, single bidirectional channel). The 5KP210CA-B maintains ROHS3 compliance and active product status, ensuring long-term availability and supply chain continuity.

The 5KP210CA-B provides enhanced performance margins with lower clamping voltage (349.5V versus 366.98V), higher peak pulse current (14.6A versus 8.6A), and greater peak pulse power (5000W versus 3000W). These characteristics ensure superior transient suppression capability while maintaining full electrical and mechanical compatibility with the original 3KP210C-B design.

Frequently Asked Questions (FAQ)

Q: Can the 5KP210CA-B directly replace the 3KP210C-B in existing designs?

A: Yes. Both components feature identical reverse standoff voltage (210V), mounting type (through-hole P600 axial), package dimensions, and operating temperature range. The 5KP210CA-B provides enhanced performance with lower clamping voltage and higher current/power ratings, making it a direct functional upgrade.

Q: What is the significance of the lower clamping voltage in the 5KP210CA-B?

A: The 5KP210CA-B clamps at 349.5V maximum compared to 366.98V for the 3KP210C-B. Lower clamping voltage provides more aggressive transient suppression, reducing voltage stress on protected circuitry. This represents an improvement in protection performance.

Q: Are there any thermal or compliance differences between these parts?

A: No. Both components operate across the identical temperature range (-55°C ~ 175°C junction temperature) and maintain ROHS3 compliance. Thermal and regulatory characteristics are equivalent.

Q: Why is the 3KP210C-B obsolete while the 5KP210CA-B remains active?

A: The 5KP series represents a newer generation of TVS diodes with improved performance specifications. Littelfuse has transitioned product lines to the 5KP series, which offers higher power dissipation and current handling while maintaining backward compatibility with legacy 3KP applications.

Q: Are the P600 axial packages physically identical?

A: Yes. Both the 3KP210C-B and 5KP210CA-B use the P600 axial through-hole package, ensuring identical PCB footprints and mechanical fit without design modifications.