P4SMA24C Equivalent & Substitute Parts

Part Overview

The P4SMA24C is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface mount applications. This part operates with a 20.5V reverse standoff voltage and provides 34.86V clamping at peak pulse current. The P4SMA24C is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.

Substiute Parts

P4SMA24C

Littelfuse Inc.In Stock: 949P4SMA24C Datasheet

Current PartRFQ

P4SMA24CA

Eaton - Electronics DivisionIn Stock: 1265P4SMA24CA Datasheet

MFR RecommendedRFQ

P4SMA24CA

Eaton - Electronics DivisionIn Stock: 1265P4SMA24CA Datasheet

MFR RecommendedRFQ

P4SMA24CA-E3/61

Vishay General Semiconductor - Diodes DivisionIn Stock: 912P4SMA24CA-E3/61 Datasheet

MFR RecommendedRFQ

SMAJP4KE24CA-TP

Micro Commercial CoIn Stock: 928SMAJP4KE24CA-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the P4SMA24C is determined by the following critical parameters:

• Reverse standoff voltage: 20.5V (all substitutes match)
• Peak pulse current: 12.3A minimum (all substitutes meet or exceed)
• Clamping voltage: 33.2V to 34.86V range (acceptable variance for TVS diodes)
• Package: DO-214AC / SMA form factor (all substitutes use compatible packages)
• Bidirectional channels: 1 (all substitutes match)
• Type: Zener TVS diode (all substitutes match)

All listed substitute parts maintain electrical compatibility within the specified parameter tolerances for this TVS diode category.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: P4SMA24CA (Eaton - Electronics Division)

The P4SMA24CA is the manufacturer-recommended substitute with active product status. It maintains identical reverse standoff voltage (20.5V) and peak pulse current (12.3A) specifications. The clamping voltage is 33.2V, which is within acceptable tolerance for TVS diode applications. This part is RoHS compliant and available in standard tape and reel packaging.

Secondary Substitute: P4SMA24CA-E3/61 (Vishay General Semiconductor)

The P4SMA24CA-E3/61 offers active product status with identical reverse standoff voltage and operating temperature range matching the original part (-65°C ~ 150°C). Peak pulse current is rated at 12A, which is marginally lower than the original 12.3A specification. This part is ROHS3 compliant and maintains full compatibility with the DO-214AC package footprint.

Tertiary Substitute: SMAJP4KE24CA-TP (Micro Commercial Co)

The SMAJP4KE24CA-TP provides active product status with extended operating temperature range (-55°C ~ 175°C). It maintains 20.5V reverse standoff voltage and 12.3A peak pulse current. The package designation is DO-214AC (SMAJ), which is mechanically compatible with standard SMA footprints. Temperature range extension may be beneficial for high-temperature applications.

Frequently Asked Questions (FAQ)

Q: Can P4SMA24CA directly replace P4SMA24C in existing designs?

A: Yes. The P4SMA24CA maintains the critical electrical parameters: 20.5V reverse standoff voltage, 12.3A peak pulse current, and 400W peak pulse power. The clamping voltage difference (33.2V vs 34.86V) is within normal TVS diode tolerance ranges and does not affect circuit compatibility.

Q: What is the difference between the Eaton and Vishay substitute options?

A: Both maintain 20.5V standoff voltage and 400W power rating. The Eaton P4SMA24CA provides 12.3A peak pulse current, while the Vishay P4SMA24CA-E3/61 provides 12A. The Vishay part matches the original operating temperature range (-65°C ~ 150°C). Both are active products with current availability.

Q: Is the SMAJP4KE24CA-TP package compatible with SMA footprints?

A: Yes. The SMAJP4KE24CA-TP uses the DO-214AC (SMAJ) package, which is mechanically and electrically compatible with standard SMA surface mount footprints. No PCB layout modifications are required.

Q: Why is the original P4SMA24C obsolete?

A: Product obsolescence is determined by the manufacturer. Active substitute parts from Eaton, Vishay, and Micro Commercial Co provide equivalent electrical performance and are recommended for new designs and ongoing procurement.

Q: Are all substitute parts RoHS compliant?

A: The Eaton P4SMA24CA is RoHS compliant. The Vishay P4SMA24CA-E3/61 is ROHS3 compliant. RoHS compliance status for the Micro Commercial Co part is not specified in available documentation.

Q: What is the minimum peak pulse current requirement for substitution?

A: The original P4SMA24C specifies 12.3A peak pulse current. The Vishay substitute provides 12A, which is acceptable for most applications. The Eaton and Micro Commercial Co substitutes both provide 12.3A, matching the original specification exactly.