Equivalent & Substitute Parts for P4SMA20C

Part Overview

The P4SMA20C is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component features a 17.1V reverse standoff voltage with a 29.09V maximum clamping voltage and 14.8A peak pulse current capability in a DO-214AC (SMA) package. The P4SMA20C is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements.

Substiute Parts

P4SMA20C

Littelfuse Inc.In Stock: 844P4SMA20C Datasheet

Current PartRFQ

P4SMA20CA

Eaton - Electronics DivisionIn Stock: 5170P4SMA20CA Datasheet

DirectRFQ

P4SMA20CA

Eaton - Electronics DivisionIn Stock: 5170P4SMA20CA Datasheet

DirectRFQ

SMAJP4KE20CA-TP

Micro Commercial CoIn Stock: 894SMAJP4KE20CA-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the P4SMA20C are qualified based on the following critical parameters that must remain consistent:

• Voltage - Reverse Standoff (Typ): 17.1V
• Current - Peak Pulse (10/1000µs): 14.8A
• Power - Peak Pulse: 400W
• Mounting Type: Surface Mount
• Package / Case: DO-214AC, SMA
• Type: Zener
• Bidirectional Channels: 1

Acceptable variations within the substitute group include:

• Voltage - Clamping (Max) @ Ipp: 27.7V to 29.09V
• Voltage - Breakdown (Min): 18.05V to 19V
• Operating Temperature Range: -55°C to -65°C minimum; 150°C to 175°C maximum
• Product Status: Active substitutes preferred over obsolete

Parameter Comparison

Engineering Selection Recommendations

P4SMA20CA (Eaton - Electronics Division) is the primary substitute for the obsolete P4SMA20C. This part maintains identical reverse standoff voltage (17.1V) and peak pulse current (14.8A) specifications. The clamping voltage is 27.7V compared to the original 29.09V, representing a 4.8% reduction within acceptable design margins for general-purpose TVS applications. The P4SMA20CA carries Active product status with RoHS compliance and unlimited moisture sensitivity rating, ensuring long-term availability and regulatory compliance. Operating temperature minimum is -55°C versus the original -65°C, which is acceptable for most industrial and commercial applications.

SMAJP4KE20CA-TP (Micro Commercial Co) is an alternative substitute with identical electrical performance to the P4SMA20CA. This part offers an extended maximum operating temperature of 175°C compared to 150°C, providing additional thermal margin for high-temperature environments. The SMAJP4KE20CA-TP is supplied in bulk packaging and maintains Active product status. The package designation is DO-214AC (SMAJ) rather than standard SMA, which may require verification for PCB footprint compatibility.

Both substitute parts are electrically equivalent to the P4SMA20C within the specified parameter tolerances and are suitable for direct replacement in new designs and production applications.

Frequently Asked Questions (FAQ)

Q: Can P4SMA20CA be used as a direct replacement for P4SMA20C?

A: Yes. The P4SMA20CA maintains the critical electrical parameters: 17.1V reverse standoff voltage, 14.8A peak pulse current, and 400W peak pulse power. The clamping voltage difference (27.7V vs 29.09V) is within acceptable design margins for TVS diode applications. Both parts use identical DO-214AC (SMA) packaging.

Q: What is the difference between P4SMA20CA and SMAJP4KE20CA-TP?

A: Both parts have identical electrical specifications and are functionally equivalent. The primary differences are manufacturer (Eaton vs Micro Commercial Co), packaging format (Cut Tape & Digi-Reel vs Bulk), and maximum operating temperature (150°C vs 175°C). The SMAJP4KE20CA-TP package designation is DO-214AC (SMAJ) rather than standard SMA, requiring PCB footprint verification.

Q: Why is the P4SMA20C obsolete?

A: The P4SMA20C is classified as obsolete by Littelfuse Inc. Active substitute parts from other manufacturers provide equivalent performance and ensure continued availability for production and design requirements.

Q: Are there any compliance differences between the substitute parts?

A: The P4SMA20CA is RoHS Compliant with ROHS3 certification and carries unlimited moisture sensitivity rating (MSL 1). The SMAJP4KE20CA-TP compliance specifications are not provided in the available data. Verify compliance requirements for your specific application before selection.

Q: What is the minimum operating temperature difference between the original and substitute parts?

A: The P4SMA20C operates from -65°C minimum, while both substitute parts operate from -55°C minimum. This 10°C difference is acceptable for most commercial and industrial applications. Verify your application's minimum temperature requirement before selection.

Q: Can SMAJP4KE20CA-TP be used in place of P4SMA20CA?

A: Yes, electrically they are equivalent. However, the SMAJP4KE20CA-TP uses DO-214AC (SMAJ) packaging versus the standard SMA package. Confirm PCB footprint compatibility before substitution, as package variants may have different lead configurations or dimensions.