3KP180CA Equivalent & Substitute Parts

Part Overview

The 3KP180CA is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose voltage protection applications. This component features a 180V reverse standoff voltage rating with a 289V maximum clamping voltage and 10.4A peak pulse current capability in a through-hole P600 axial package. The product is currently obsolete, making identification of suitable substitute components essential for ongoing system maintenance and new design implementations where this specification remains applicable.

Substiute Parts

3KP180CA

Littelfuse Inc.In Stock: 11223KP180CA Datasheet

Current PartRFQ

5KP180CA

Littelfuse Inc.In Stock: 28165KP180CA Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3KP180CA is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Voltage - Reverse Standoff (Typ): 180V
• Voltage - Breakdown (Min): 200V
• Package / Case: P600, Axial
• Mounting Type: Through Hole
• Type: Zener (Bidirectional, 1 Channel)

Allowable Parameter Variations:

• Voltage - Clamping (Max) @ Ipp: May increase (higher clamping voltage provides improved transient suppression)
• Current - Peak Pulse (10/1000µs): May increase (higher current rating provides enhanced surge handling capability)
• Power - Peak Pulse: May increase (higher power dissipation capability)
• Product Status: Active status preferred for long-term availability

The 5KP180CA qualifies as a direct substitute based on matching the core electrical voltage specifications, identical package configuration, and compatible thermal operating range.

Parameter Comparison

Engineering Selection Recommendations

The 5KP180CA is the qualified substitute for the obsolete 3KP180CA. Both components maintain identical voltage specifications (180V reverse standoff, 200V minimum breakdown) and package configuration (P600 axial through-hole). The 5KP180CA provides enhanced performance characteristics with 17.5A peak pulse current versus 10.4A and 5000W peak pulse power versus 3000W, representing a direct upgrade path.

The 5KP180CA carries Active product status, ensuring continued availability and supply chain reliability. Both components are ROHS3 compliant and operate across the identical temperature range (-55°C to 175°C junction temperature), confirming thermal compatibility. The substitute part is suitable for direct replacement in existing designs or new implementations requiring 180V TVS diode protection.

Frequently Asked Questions (FAQ)

Q: Can the 5KP180CA directly replace the 3KP180CA in existing circuits?

A: Yes. The 5KP180CA maintains the same reverse standoff voltage (180V), breakdown voltage (200V), and P600 axial package configuration. The enhanced current and power ratings provide equivalent or improved performance in the same physical footprint.

Q: What is the significance of the higher current rating (17.5A vs 10.4A) in the 5KP180CA?

A: The increased peak pulse current capability allows the 5KP180CA to handle larger transient surge events while maintaining the same clamping voltage performance. This represents an enhancement over the original specification.

Q: Are there packaging differences between these components?

A: Both the 3KP180CA and 5KP180CA use identical P600 axial through-hole packaging. No PCB layout or mechanical modifications are required for substitution.

Q: Why is the 3KP180CA obsolete?

A: The 3KP180CA has been discontinued by Littelfuse Inc. The 5KP180CA series represents the current active product line for this voltage class and performance tier.

Q: Do both parts meet the same compliance standards?

A: Yes. Both components are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, confirming equivalent environmental and regulatory compliance.

Q: What is the difference in clamping voltage between the two parts?

A: The 3KP180CA clamps at a maximum of 289V, while the 5KP180CA clamps at 292V. This 3V difference is within normal manufacturing tolerance variation for TVS diodes and does not affect circuit compatibility.