P4SMA30C Equivalent & Substitute Parts

Part Overview

The P4SMA30C is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This component features a 25.6V reverse standoff voltage with a 43.47V maximum clamping voltage and 9.9A peak pulse current capability in a surface-mount DO-214AC (SMA) package. The part is currently listed as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and procurement.

Substiute Parts

P4SMA30C

Littelfuse Inc.In Stock: 2058P4SMA30C Datasheet

Current PartRFQ

P4SMA30CA

Eaton - Electronics DivisionIn Stock: 1270P4SMA30CA Datasheet

DirectRFQ

P4SMA30CA

Eaton - Electronics DivisionIn Stock: 1270P4SMA30CA Datasheet

DirectRFQ

SMAJP4KE30CA-TP

Micro Commercial CoIn Stock: 886SMAJP4KE30CA-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the P4SMA30C are qualified based on the following critical parameters that determine functional equivalence:

• Voltage - Reverse Standoff (Typ): 25.6V
• Voltage - Clamping (Max) @ Ipp: Within acceptable tolerance range
• Current - Peak Pulse (10/1000µs): 9.9A minimum
• Power - Peak Pulse: 400W minimum
• Package / Case: DO-214AC or SMA variants
• Mounting Type: Surface Mount
• Type: Zener diode, bidirectional, single channel

The substitute parts listed maintain these core electrical specifications while offering active product status and improved availability compared to the obsolete P4SMA30C.

Parameter Comparison

Engineering Selection Recommendations

Both P4SMA30CA (Eaton) and SMAJP4KE30CA-TP (Micro Commercial Co) are active product alternatives to the obsolete P4SMA30C. Selection between these substitutes should be based on the following factors:

P4SMA30CA (Eaton - Electronics Division): This part maintains identical reverse standoff voltage and peak pulse current specifications. The clamping voltage is 41.4V compared to the original 43.47V, representing a 4.8% reduction. Operating temperature range is -55 to 150°C. RoHS compliance is confirmed. This part is designated as a direct manufacturer substitute.

SMAJP4KE30CA-TP (Micro Commercial Co): This part also maintains the 25.6V reverse standoff voltage and 9.9A peak pulse current. The clamping voltage matches the Eaton part at 41.4V. Operating temperature range extends to 175°C maximum, providing enhanced thermal performance. REACH status is unaffected. This part is designated as a manufacturer-recommended substitute.

Both alternatives are surface-mount components in DO-214AC/SMA packages, ensuring mechanical and electrical compatibility with the original P4SMA30C footprint. Selection should account for application-specific temperature requirements and supply chain availability.

Frequently Asked Questions (FAQ)

Q: Can P4SMA30CA or SMAJP4KE30CA-TP be used as direct replacements for P4SMA30C?

A: Yes, both parts are functionally equivalent substitutes. They maintain the same reverse standoff voltage (25.6V), peak pulse current (9.9A), and package type (DO-214AC/SMA). The primary difference is the clamping voltage: P4SMA30C clamps at 43.47V maximum, while both substitutes clamp at 41.4V maximum. This 2.07V difference must be evaluated against circuit protection requirements.

Q: What is the significance of the clamping voltage difference?

A: The clamping voltage determines the maximum voltage the TVS diode will allow across the protected circuit during a transient event. The P4SMA30C clamps at 43.47V, while the substitutes clamp at 41.4V. Lower clamping voltage provides tighter protection but may affect circuit performance if the protected component requires higher voltage tolerance. Circuit validation is necessary to confirm compatibility.

Q: Are there temperature range considerations when selecting a substitute?

A: The P4SMA30C operates from -65 to 150°C. P4SMA30CA operates from -55 to 150°C, and SMAJP4KE30CA-TP operates from -55 to 175°C. If the application requires operation below -55°C, neither substitute is suitable. If operation above 150°C is required, only SMAJP4KE30CA-TP supports this range.

Q: Do the substitute parts have the same package footprint?

A: Yes. All three parts use the DO-214AC (SMA) surface-mount package, ensuring identical PCB footprint compatibility. No layout modifications are required for substitution.

Q: What is the difference between P4SMA30CA and SMAJP4KE30CA-TP?

A: Both parts have identical electrical specifications (25.6V standoff, 41.4V clamp, 9.9A peak pulse). The key differences are manufacturer (Eaton vs. Micro Commercial Co), product series designation, and operating temperature range (SMAJP4KE30CA-TP extends to 175°C). Selection depends on supply availability and thermal requirements.

Q: Are both substitutes RoHS compliant?

A: P4SMA30CA is RoHS compliant. SMAJP4KE30CA-TP has REACH Unaffected status. Both meet environmental compliance requirements for most applications, though specific regulatory requirements should be confirmed for your end application.