3KP7.5C Equivalent & Substitute Parts

Part Overview

The 3KP7.5C is a bidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection applications. This component features a 7.5V reverse standoff voltage with a 14.65V maximum clamping voltage and 232.6A peak pulse current capability in a through-hole P600 axial package. The 3KP7.5C is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

3KP7.5C

Littelfuse Inc.In Stock: 11283KP7.5C Datasheet

Current PartRFQ

5KP7.5CA

Littelfuse Inc.In Stock: 44295KP7.5CA Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3KP7.5C is determined by the following critical parameters:

• Voltage Rating: Reverse standoff voltage must remain 7.5V to maintain circuit protection thresholds
• Package Type: P600 axial through-hole package ensures mechanical and electrical compatibility
• Bidirectional Configuration: Single bidirectional channel requirement
• Peak Pulse Current: Substitute must support the application's transient current demands
• Clamping Voltage: Maximum clamping voltage determines overvoltage protection effectiveness
• Power Dissipation: Peak pulse power rating must be adequate for the application environment
• Temperature Range: Operating temperature specification must match or exceed -55°C ~ 175°C (TJ)
• Compliance: RoHS3 compliance and EAR99 classification must be maintained

The 5KP7.5CA qualifies as a direct substitute based on matching voltage rating, package configuration, bidirectional channel count, temperature range, and compliance certifications. The 5KP7.5CA provides enhanced electrical performance characteristics within the same mechanical footprint.

Parameter Comparison

Engineering Selection Recommendations

The 5KP7.5CA is the qualified substitute for the obsolete 3KP7.5C. Both components are manufactured by Littelfuse Inc. and maintain identical voltage ratings, package configurations, and operating temperature ranges. The 5KP7.5CA offers superior electrical performance with higher peak pulse current (395.3A versus 232.6A) and greater peak pulse power dissipation (5000W versus 3000W), providing enhanced transient protection capability within the same mechanical envelope.

The 5KP7.5CA maintains active product status, ensuring long-term availability and supply chain continuity. Both components are ROHS3 compliant and classified under EAR99, meeting regulatory and export requirements. The lower clamping voltage of the 5KP7.5CA (12.9V versus 14.65V) provides marginally improved overvoltage protection performance.

Frequently Asked Questions (FAQ)

Q: Can the 5KP7.5CA be used as a direct replacement for the 3KP7.5C?

A: Yes. Both components share identical reverse standoff voltage (7.5V), package type (P600 axial), bidirectional channel configuration, and operating temperature range (-55°C ~ 175°C). The 5KP7.5CA provides equivalent or superior electrical performance for transient voltage suppression applications.

Q: What are the key differences between these two parts?

A: The primary differences are product status and electrical performance. The 3KP7.5C is obsolete, while the 5KP7.5CA is active. The 5KP7.5CA provides higher peak pulse current (395.3A versus 232.6A) and greater power dissipation (5000W versus 3000W). The 5KP7.5CA also features a lower maximum clamping voltage (12.9V versus 14.65V).

Q: Are there any package or mounting differences?

A: No. Both components use the P600 axial through-hole package and are mounted identically on printed circuit boards. No PCB layout modifications are required for substitution.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the 3KP7.5C and 5KP7.5CA are ROHS3 compliant, classified as EAR99, and have MSL rating of 1 (Unlimited). Regulatory and environmental compliance requirements are equivalent.

Q: Why should I choose the 5KP7.5CA over the 3KP7.5C?

A: The 5KP7.5CA is the recommended choice because it is an active product with guaranteed long-term availability. The 3KP7.5C is obsolete and subject to supply discontinuation. The 5KP7.5CA also provides enhanced electrical performance characteristics suitable for demanding transient protection applications.