P4SMA27C Equivalent & Substitute Parts

Part Overview

The P4SMA27C is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose voltage clamping applications. This part operates with a reverse standoff voltage of 23.1V and provides clamping at 39.38V maximum. The P4SMA27C is classified as obsolete, making identification of suitable substitute components necessary for ongoing design support and procurement.

Substiute Parts

P4SMA27C

Littelfuse Inc.In Stock: 956P4SMA27C Datasheet

Current PartRFQ

P4SMA27CA

Eaton - Electronics DivisionIn Stock: 97152P4SMA27CA Datasheet

DirectRFQ

P4SMA27CA

Eaton - Electronics DivisionIn Stock: 97152P4SMA27CA Datasheet

DirectRFQ

SMAJP4KE27CA-TP

Micro Commercial CoIn Stock: 1028SMAJP4KE27CA-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P4SMA27C is determined by the following critical parameters:

• Reverse standoff voltage: 23.1V (must match)
• Peak pulse current: 10.9A (must match)
• Peak pulse power: 400W (must match)
• Bidirectional channels: 1 (must match)
• Package type: DO-214AC, SMA (must match)
• Mounting type: Surface Mount (must match)

The substitute parts identified maintain these core electrical and mechanical specifications. Variations in clamping voltage (within the range 37.5V to 39.38V) and operating temperature ranges are acceptable within the functional requirements of this component category.

Parameter Comparison

Engineering Selection Recommendations

Both P4SMA27CA (Eaton) and SMAJP4KE27CA-TP (Micro Commercial Co) are active production alternatives to the obsolete P4SMA27C.

The P4SMA27CA from Eaton is a direct manufacturer equivalent with active product status and RoHS compliance. This part maintains the same reverse standoff voltage and peak pulse specifications as the original. The clamping voltage is 37.5V, which is lower than the original 39.38V specification but remains within acceptable functional parameters for TVS diode substitution in this voltage class.

The SMAJP4KE27CA-TP from Micro Commercial Co is a manufacturer-recommended alternative with active product status. This part also maintains the critical electrical parameters and offers an extended operating temperature range to 175°C. The clamping voltage specification matches the Eaton alternative at 37.5V.

Both substitutes are suitable for applications previously served by the P4SMA27C, provided that the lower clamping voltage (37.5V versus 39.38V) is acceptable within the circuit design margins.

Frequently Asked Questions (FAQ)

Q: Can P4SMA27CA be used as a direct replacement for P4SMA27C?

A: Yes. Both parts share identical reverse standoff voltage (23.1V), peak pulse current (10.9A), peak pulse power (400W), and package specifications (DO-214AC, SMA). The P4SMA27CA has active product status and is available in volume quantities.

Q: What is the difference in clamping voltage between the original and substitutes?

A: The P4SMA27C specifies a maximum clamping voltage of 39.38V at peak pulse current. Both substitute parts (P4SMA27CA and SMAJP4KE27CA-TP) specify 37.5V maximum clamping voltage. This 1.88V difference must be evaluated within the circuit design to confirm compatibility.

Q: Are there packaging differences between these parts?

A: All three parts use the DO-214AC (SMA) package for surface mount applications. The P4SMA27CA is supplied in Tape & Reel format, while SMAJP4KE27CA-TP is supplied in Bulk packaging. Both are compatible with standard pick-and-place assembly equipment.

Q: Which substitute offers the widest operating temperature range?

A: The SMAJP4KE27CA-TP from Micro Commercial Co operates from -55°C to 175°C, providing a 25°C extension on the upper temperature limit compared to the original P4SMA27C specification of -65°C to 150°C.

Q: Are both substitutes RoHS compliant?

A: The P4SMA27CA is confirmed RoHS compliant. Compliance information for SMAJP4KE27CA-TP is not specified in the available data.