3KP7.5CA Equivalent & Substitute Parts

Part Overview

The 3KP7.5CA is a bidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in through-hole applications. This component features a 7.5V reverse standoff voltage with a 12.9V maximum clamping voltage and 232.6A peak pulse current capability. The part is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and procurement continuity.

Substiute Parts

3KP7.5CA

Littelfuse Inc.In Stock: 7383KP7.5CA Datasheet

Current PartRFQ

5KP7.5CA

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

DirectRFQ

3KP7.5CA-TP

Micro Commercial CoIn Stock: 12373KP7.5CA-TP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 3KP7.5CA are identified based on strict electrical and mechanical compatibility criteria. The following parameters must remain constant across all substitutes:

• Voltage - Reverse Standoff (Typ): 7.5V
• Voltage - Breakdown (Min): 8.33V
• Voltage - Clamping (Max) @ Ipp: 12.9V
• Type: Zener, Bidirectional
• Operating Temperature Range: -55°C to 175°C (TJ)
• Mounting Type: Through Hole
• Applications: General Purpose

Substitutes are grouped into two categories: direct electrical equivalents with identical power ratings and enhanced-performance alternatives with higher peak pulse power capability. Package variations (P600 vs. R-6) are noted as mechanical considerations for board layout compatibility.

Parameter Comparison

Engineering Selection Recommendations

5KP7.5CA (Littelfuse Inc.): This substitute is the preferred choice for new designs and procurement. It maintains identical electrical specifications to the 3KP7.5CA while offering enhanced peak pulse power capability (5000W vs. 3000W) and is currently in active production status. The P600 package matches the original component footprint, ensuring direct board-level compatibility. ROHS3 compliance is confirmed.

3KP7.5CA-TP (Micro Commercial Co): This substitute provides electrical equivalence with identical power rating (3000W) and peak pulse current (232.6A) to the original part. Active product status ensures supply chain availability. The R-6 package represents a mechanical variation requiring board layout verification. REACH compliance is confirmed, though RoHS status is not specified in available documentation.

Frequently Asked Questions (FAQ)

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

A: Yes. The 5KP7.5CA maintains all critical electrical parameters: 7.5V reverse standoff voltage, 8.33V minimum breakdown voltage, and 12.9V maximum clamping voltage. The identical P600 package ensures mechanical compatibility. The higher power rating (5000W vs. 3000W) provides additional margin without affecting circuit operation.

Q: What is the difference between the P600 and R-6 packages?

A: Both are axial through-hole packages for bidirectional TVS diodes. The P600 and R-6 represent different physical form factors. Board layout and hole spacing must be verified when substituting between these packages.

Q: Is the 3KP7.5CA-TP suitable for applications requiring the original 3KP7.5CA specifications?

A: Yes. The 3KP7.5CA-TP provides electrical equivalence with matching voltage and current ratings. The R-6 package requires mechanical compatibility verification. Micro Commercial Co manufacturing ensures active product status and supply availability.

Q: Why is the 3KP7.5CA classified as obsolete?

A: Obsolete status indicates the part is no longer manufactured by Littelfuse Inc. The 5KP7.5CA serves as the active-production successor, offering equivalent or enhanced performance characteristics.

Q: Are all substitutes RoHS compliant?

A: The 5KP7.5CA is confirmed ROHS3 compliant. The 3KP7.5CA-TP RoHS status is not specified in available documentation and should be verified with the manufacturer if RoHS compliance is a design requirement.