15KP20C Equivalent & Substitute Parts

Part Overview

The 15KP20C is a Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection applications. This component features a 20V reverse standoff voltage with a maximum clamping voltage of 36.02V at peak pulse current, rated for 15kW peak pulse power dissipation. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain functional compatibility for new designs and production continuity.

Substiute Parts

15KP20C

Littelfuse Inc.In Stock: 94715KP20C Datasheet

Current PartRFQ

5KP20CA-TP

Micro Commercial CoIn Stock: 15375KP20CA-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 15KP20C is determined by the following critical electrical and mechanical parameters:

• Voltage - Reverse Standoff (Typ): 20V
• Voltage - Breakdown (Min): minimum 20.98V
• Bidirectional Channels: 1
• Type: Zener
• Mounting Type: Through Hole
• Operating Temperature Range: -55°C ~ 175°C (TJ)
• RoHS Status: ROHS3 Compliant

The 5KP20CA-TP qualifies as a functional equivalent based on matching reverse standoff voltage (20V), breakdown voltage specification (22.2V minimum), identical bidirectional channel configuration, zener type classification, through-hole mounting, and equivalent operating temperature range. Both components maintain ROHS3 compliance and are rated for general-purpose transient voltage suppression applications.

Parameter Comparison

Engineering Selection Recommendations

The 5KP20CA-TP is an active equivalent for the obsolete 15KP20C. Both components share identical reverse standoff voltage (20V) and operating temperature specifications (-55°C ~ 175°C). The substitute maintains ROHS3 compliance and MSL Level 1 rating, ensuring regulatory and environmental compatibility.

Key differences exist in power dissipation capacity and clamping voltage. The 15KP20C is rated for 15kW peak pulse power with a maximum clamping voltage of 36.02V, while the 5KP20CA-TP is rated for 5kW peak pulse power with a maximum clamping voltage of 32.4V. These differences must be evaluated against circuit protection requirements. The 5KP20CA-TP also features a different package designation (R-6 versus P600), though both maintain axial through-hole configuration.

Selection of the 5KP20CA-TP is appropriate for applications where the 5kW power rating and 32.4V clamping voltage are sufficient for the intended transient suppression function. Applications requiring the full 15kW capacity or lower clamping voltage of the original part require alternative component evaluation.

Frequently Asked Questions (FAQ)

Q: Can the 5KP20CA-TP directly replace the 15KP20C in existing designs?

A: Direct replacement is possible only if the circuit design accommodates the 5kW power rating and 32.4V maximum clamping voltage of the 5KP20CA-TP. The lower power dissipation capacity and higher clamping voltage must be verified against circuit protection specifications.

Q: Are the package differences between P600 and R-6 significant for PCB layout?

A: Both packages are axial through-hole configurations. Physical dimensions and lead spacing may differ. PCB layout compatibility must be confirmed against the specific package drawings for each component.

Q: Do both parts meet the same regulatory compliance standards?

A: Yes. Both the 15KP20C and 5KP20CA-TP are ROHS3 compliant with MSL Level 1 rating, meeting equivalent environmental and regulatory requirements.

Q: What is the primary reason for substitution?

A: The 15KP20C is classified as obsolete. The 5KP20CA-TP is an active product from an alternative manufacturer, providing production continuity and availability for new designs and ongoing production requirements.

Q: Are there electrical performance differences that affect circuit operation?

A: Yes. The 5KP20CA-TP has a lower peak pulse power rating (5kW versus 15kW) and lower maximum clamping voltage (32.4V versus 36.02V). These parameters must be evaluated against the specific transient voltage protection requirements of the application.