Equivalent & Substitute Parts for 3KP6.5C

Part Overview

The 3KP6.5C is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose voltage clamping applications. This through-hole component features a 6.5V reverse standoff voltage and 11.76V maximum clamping voltage with 267.9A peak pulse current capability. The product is currently obsolete, necessitating identification of functionally equivalent alternatives to maintain design continuity and ensure component availability for repair, maintenance, and new production requirements.

Substiute Parts

3KP6.5C

Littelfuse Inc.In Stock: 11833KP6.5C Datasheet

Current PartRFQ

5KP6.5CA

Diotec SemiconductorIn Stock: 38725KP6.5CA Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3KP6.5C is determined by the following critical parameters:

• Voltage Rating Match: Reverse standoff voltage of 6.5V and breakdown voltage minimum of 6.84V establish the primary voltage class for substitution eligibility
• Package Compatibility: P600 axial through-hole package ensures mechanical and electrical compatibility with existing PCB layouts
• Clamping Voltage Performance: Maximum clamping voltage must remain within acceptable circuit protection limits
• Peak Pulse Current Capability: Minimum 267.9A peak pulse current (10/1000µs) required to handle transient events
• Thermal Operating Range: Component must operate within -55°C to 175°C junction temperature specification
• Bidirectional Configuration: Single-channel bidirectional TVS diode topology

The 5KP6.5CA from Diotec Semiconductor meets all substitution criteria, offering enhanced performance characteristics while maintaining electrical and mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The 5KP6.5CA is a direct functional substitute for the obsolete 3KP6.5C. Both components are ROHS3 compliant and designed for general-purpose transient voltage suppression applications. The 5KP6.5CA provides superior performance margins with higher peak pulse current (446A versus 267.9A) and greater peak pulse power dissipation (5000W versus 3000W), making it suitable for applications requiring enhanced transient protection. The substitute maintains identical voltage ratings and package configuration, ensuring drop-in compatibility with existing circuit designs. The 5KP6.5CA is currently in active production status with established supply availability, addressing the obsolescence of the original component.

Frequently Asked Questions (FAQ)

Q: Can the 5KP6.5CA be used as a direct replacement for the 3KP6.5C?

A: Yes. Both components share identical reverse standoff voltage (6.5V), package type (P600 axial through-hole), and bidirectional zener diode configuration. The 5KP6.5CA meets or exceeds all electrical performance requirements of the 3KP6.5C.

Q: What are the differences in clamping voltage between these parts?

A: The 3KP6.5C has a maximum clamping voltage of 11.76V, while the 5KP6.5CA clamps at 11.2V. This lower clamping voltage in the substitute provides improved circuit protection performance.

Q: Does the higher peak pulse current of the 5KP6.5CA affect circuit compatibility?

A: No. Higher peak pulse current capability (446A versus 267.9A) represents an enhancement that does not compromise circuit compatibility. The substitute can handle transient events with greater margin.

Q: Are there temperature range considerations for substitution?

A: The 5KP6.5CA operates from -50°C to 175°C, compared to the 3KP6.5C range of -55°C to 175°C. For applications requiring operation below -50°C, this difference must be evaluated against specific system requirements.

Q: What is the packaging difference between these components?

A: Both components use identical P600 axial through-hole packaging. No PCB layout modifications are required for substitution.

Q: Are both components RoHS compliant?

A: Yes. Both the 3KP6.5C and 5KP6.5CA are ROHS3 compliant, meeting environmental and regulatory requirements.