15KP54C-B Equivalent & Substitute Parts

Part Overview

The 15KP54C-B is a Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose voltage clamping applications. This component features a 54V reverse standoff voltage with a maximum clamping voltage of 91.88V 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 electrical and mechanical compatibility for continued system support and new designs.

Substiute Parts

15KP54C-B

Littelfuse Inc.In Stock: 118215KP54C-B Datasheet

Current PartRFQ

15KP54CA-TP

Micro Commercial CoIn Stock: 142915KP54CA-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 15KP54C-B is determined by strict equivalence across the following critical electrical and mechanical parameters:

• Voltage - Reverse Standoff (Typ): 54V
• Voltage - Clamping (Max) @ Ipp: Maximum allowable variance within application tolerance
• Power - Peak Pulse: 15000W (15kW)
• Bidirectional Channels: 1
• Mounting Type: Through Hole
• Operating Temperature Range: -55°C ~ 175°C (TJ)
• RoHS Status: ROHS3 Compliant

The substitute part 15KP54CA-TP, manufactured by Micro Commercial Co, meets these core electrical requirements with a 54V reverse standoff voltage and 15kW peak pulse power rating. The clamping voltage of 87.5V is within acceptable operational parameters for general-purpose TVS applications. Both parts maintain identical temperature operating ranges and RoHS3 compliance. Package differences (P600 vs. R-6 axial) are mechanical considerations that must be evaluated for board layout compatibility.

Parameter Comparison

Engineering Selection Recommendations

The 15KP54CA-TP is the manufacturer-recommended substitute for the obsolete 15KP54C-B. Both components are ROHS3 compliant and maintain identical operating temperature ranges (-55°C ~ 175°C), ensuring regulatory and thermal compatibility. The substitute part carries active product status, providing assured long-term availability and supply chain continuity.

The electrical parameters align within acceptable tolerances for general-purpose TVS applications. The clamping voltage differential (87.5V vs. 91.88V) represents a 4.8% reduction, which is within typical design margins for transient suppression circuits. Both parts deliver equivalent 15kW peak pulse power dissipation and maintain the same reverse standoff voltage specification of 54V.

The primary consideration is mechanical package compatibility. The P600 axial package of the original part differs from the R-6 axial package of the substitute. Board layout, lead spacing, and mechanical mounting must be verified to ensure physical fit within the application.

Frequently Asked Questions (FAQ)

Q: Can the 15KP54CA-TP directly replace the 15KP54C-B without circuit modification?

A: Electrical substitution is valid based on matching reverse standoff voltage (54V), peak pulse power (15kW), and operating temperature range. However, the package change from P600 to R-6 axial requires mechanical verification. Board layout, lead hole spacing, and mounting clearances must be confirmed before implementation.

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

A: The 15KP54C-B specifies a maximum clamping voltage of 91.88V, while the 15KP54CA-TP specifies 87.5V. This 4.8% difference falls within typical design tolerances for general-purpose TVS applications. The lower clamping voltage of the substitute may provide marginally improved transient suppression performance in some circuits.

Q: Are both parts RoHS compliant?

A: Yes. Both the 15KP54C-B and 15KP54CA-TP are ROHS3 compliant, meeting current environmental and regulatory requirements for electronic component manufacturing and use.

Q: Why is the original part listed as obsolete?

A: The 15KP54C-B is classified as obsolete by Littelfuse Inc., indicating discontinued production. The 15KP54CA-TP, manufactured by Micro Commercial Co, is an active product with ongoing availability, making it the appropriate choice for new designs and component replenishment.

Q: What packaging format should I specify when ordering the substitute?

A: The 15KP54CA-TP is supplied in Cut Tape (CT) packaging. Verify that your procurement and assembly processes accommodate this packaging format, or confirm alternative packaging availability with your supplier.