P4SMA24 Equivalent & Substitute Parts

Part Overview

The P4SMA24 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component features a 20.5V reverse standoff voltage with a 34.86V maximum clamping voltage and 12.3A peak pulse current capability in a DO-214AC (SMA) package. The P4SMA24 is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements.

Substiute Parts

P4SMA24

Littelfuse Inc.In Stock: 771P4SMA24 Datasheet

Current PartRFQ

P4SMA24A

Eaton - Electronics DivisionIn Stock: 34930P4SMA24A Datasheet

MFR RecommendedRFQ

P4SMA24A

Eaton - Electronics DivisionIn Stock: 34930P4SMA24A Datasheet

MFR RecommendedRFQ

P4SMA24A-M3/5A

Vishay General Semiconductor - Diodes DivisionIn Stock: 1104P4SMA24A-M3/5A Datasheet

MFR RecommendedRFQ

SMAJP4KE24A-TP

Micro Commercial CoIn Stock: 764SMAJP4KE24A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P4SMA24 is determined by strict equivalence in the following electrical and mechanical parameters:

• Voltage - Reverse Standoff (Typ): 20.5V
• Voltage - Clamping (Max) @ Ipp: Must not exceed 34.86V
• Current - Peak Pulse (10/1000µs): 12.3A minimum
• Power - Peak Pulse: 400W
• Package / Case: DO-214AC, SMA
• Mounting Type: Surface Mount
• Type: Zener, Unidirectional

All substitute parts listed maintain these core electrical specifications and physical form factor, ensuring direct functional compatibility in circuit applications designed for the P4SMA24.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts maintain active product status, ensuring long-term availability and supply chain stability compared to the obsolete P4SMA24. The P4SMA24A from Eaton and SMAJP4KE24A-TP from Micro Commercial Co provide identical peak pulse current ratings (12.3A) and are recommended for applications requiring exact electrical performance matching. The P4SMA24A-M3/5A from Vishay offers a marginally reduced peak pulse current (12A) but maintains all other critical electrical parameters and extends the upper operating temperature to 150°C, matching the original specification.

For applications with strict temperature requirements below -55°C, the P4SMA24A-M3/5A from Vishay is the appropriate selection, as it maintains the original -65°C lower operating limit. All substitute parts are RoHS compliant or ROHS3 compliant, meeting modern environmental and regulatory requirements. Inventory availability is highest for the P4SMA24A from Eaton (34,825 pcs), providing supply security for production volumes.

Frequently Asked Questions (FAQ)

Q: Can the P4SMA24A from Eaton be used as a direct replacement for the P4SMA24?

A: Yes. The P4SMA24A maintains identical reverse standoff voltage (20.5V), peak pulse current (12.3A), and power dissipation (400W). The clamping voltage is 33.2V compared to 34.86V on the original, which is within acceptable substitution parameters. Both use the DO-214AC (SMA) package with identical pinout and mounting requirements.

Q: What is the difference between the P4SMA24A-M3/5A and other substitutes?

A: The P4SMA24A-M3/5A from Vishay has a peak pulse current rating of 12A versus 12.3A for other substitutes. It maintains the original -65°C lower operating temperature limit. The clamping voltage is 33.2V. This part is suitable for applications where the lower temperature range is critical.

Q: Are all substitute parts available in the same packaging?

A: All substitute parts use the DO-214AC (SMA) surface-mount package. The P4SMA24A from Eaton is supplied in Tape & Reel (TR) packaging, the P4SMA24A-M3/5A from Vishay is supplied in Tape & Reel (TR) packaging, and the SMAJP4KE24A-TP from Micro Commercial Co is supplied in Bulk packaging. Packaging format does not affect electrical or mechanical compatibility.

Q: Which substitute part has the best long-term availability?

A: The P4SMA24A from Eaton has the highest current inventory (34,825 pcs) and active product status, indicating strong supply chain support and long-term availability for production requirements.

Q: Do all substitutes meet RoHS compliance requirements?

A: The P4SMA24A from Eaton is RoHS Compliant. The P4SMA24A-M3/5A from Vishay is ROHS3 Compliant. Both meet modern environmental standards. RoHS compliance status for the SMAJP4KE24A-TP from Micro Commercial Co is not specified in the provided data.