5KP54C Transient Voltage Suppressor - Equivalent & Substitute Parts

Part Overview

The 5KP54C is a bidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse, designed for general-purpose overvoltage protection applications. This component features a 54V reverse standoff voltage rating and 5000W peak pulse power handling capability in a through-hole P600 axial package. The 5KP54C is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for new designs and production continuity.

Substiute Parts

5KP54C

LittelfuseIn Stock: 11215KP54C Datasheet

Current PartRFQ

5KP54CA

Littelfuse Inc.In Stock: 16845KP54CA Datasheet

DirectRFQ

15KP54CA-TP

Micro Commercial CoIn Stock: 142915KP54CA-TP Datasheet

MFR RecommendedRFQ

5KP54CE3/TR13

Microchip TechnologyIn Stock: 7865KP54CE3/TR13 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 5KP54C is determined by the following critical parameters:

• Reverse Standoff Voltage: Must be 54V (±tolerance as specified by manufacturer)
• Breakdown Voltage (Min): Must be within the 56.84V to 60V range
• Clamping Voltage: Must not exceed 96.3V to ensure circuit protection integrity
• Peak Pulse Power: Minimum 5000W; higher ratings are acceptable
• Package Type: P600 or R-6 axial through-hole packages are mechanically compatible
• Operating Temperature Range: Must support -55°C to 175°C minimum
• Bidirectional Configuration: Single-channel bidirectional operation required
• RoHS Compliance: ROHS3 Compliant status required

Substitute parts meeting these criteria are electrically and mechanically interchangeable with the 5KP54C in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

5KP54CA (Littelfuse Inc.) - Primary Active Equivalent

The 5KP54CA is the direct active successor to the 5KP54C from the same manufacturer. It maintains identical reverse standoff voltage (54V), operating temperature range (-55°C to 175°C), and peak pulse power rating (5000W). The clamping voltage is lower at 87.1V compared to the original 91.46V, providing improved transient suppression performance. This part is actively manufactured and ROHS3 compliant, making it the preferred choice for direct replacement in existing designs.

5KP54CE3/TR13 (Microchip Technology) - Alternative Active Equivalent

The 5KP54CE3/TR13 maintains all critical electrical parameters including 54V reverse standoff voltage, 60V minimum breakdown voltage, and 5000W peak pulse power. The clamping voltage is 96.3V, which is within acceptable tolerance for the application. This part is actively produced and ROHS3 compliant. The P600 package ensures mechanical compatibility with the original design. Selection of this part is appropriate when Littelfuse supply is constrained.

15KP54CA-TP (Micro Commercial Co) - Higher Power Rating Alternative

The 15KP54CA-TP provides the same 54V reverse standoff voltage and operating temperature range but offers enhanced peak pulse power handling at 15000W (3× the original rating). The clamping voltage is 87.5V. The R-6 axial package is mechanically compatible with P600 footprints in through-hole applications. This part is suitable for applications requiring additional transient energy dissipation margin. ROHS3 compliance is confirmed.

All three substitute parts are ROHS3 compliant and support the full operating temperature range of the original component.

Frequently Asked Questions (FAQ)

Q: Can the 5KP54CA be used as a direct replacement for the 5KP54C?

A: Yes. The 5KP54CA is electrically and mechanically compatible. Both parts share the same 54V reverse standoff voltage, -55°C to 175°C operating temperature range, 5000W peak pulse power rating, and P600 axial through-hole package. The 5KP54CA is the active production equivalent.

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

A: Both P600 and R-6 are axial through-hole packages formats for TVS diodes. The R-6 package used by the 15KP54CA-TP is mechanically compatible with P600 footprints in circuit board designs. Component lead spacing and hole diameter requirements should be verified against board layout specifications.

Q: Why does the 15KP54CA-TP have a higher power rating (15000W vs 5000W)?

A: The 15KP54CA-TP is designed for applications requiring greater transient energy absorption. The higher power rating provides additional margin for surge protection in demanding environments. If the original circuit design requires only 5000W dissipation, the 15KP54CA-TP will function correctly with excess capacity.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The 5KP54CA, 15KP54CA-TP, and 5KP54CE3/TR13 are all ROHS3 compliant, meeting the same environmental and regulatory requirements as the original 5KP54C.

Q: What is the significance of the clamping voltage differences between substitutes?

A: Clamping voltage determines the maximum voltage level the TVS diode will allow across the protected circuit during a transient event. The 5KP54CA (87.1V) and 15KP54CA-TP (87.5V) provide lower clamping voltages than the original 5KP54C (91.46V), offering improved protection. The 5KP54CE3/TR13 (96.3V) is slightly higher but remains within acceptable operating parameters for general-purpose applications.

Q: Can I use these substitutes in new product designs?

A: Yes. All three substitute parts are actively manufactured and ROHS3 compliant. The 5KP54CA is recommended for new designs as the direct Littelfuse equivalent. The 5KP54CE3/TR13 and 15KP54CA-TP are suitable alternatives when supply or performance requirements differ.