Equivalent & Substitute Parts for P4SMA15C

Part Overview

The P4SMA15C 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 12.8V reverse standoff voltage with a 22.26V maximum clamping voltage and 19.3A peak pulse current capability in a DO-214AC (SMA) package.

The P4SMA15C is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for systems utilizing this component.

Substiute Parts

P4SMA15C

Littelfuse Inc.In Stock: 835P4SMA15C Datasheet

Current PartRFQ

P4SMA15CA

Eaton - Electronics DivisionIn Stock: 6002P4SMA15CA Datasheet

DirectRFQ

P4SMA15CA

Eaton - Electronics DivisionIn Stock: 6002P4SMA15CA Datasheet

DirectRFQ

SMAJP4KE15CA-TP

Micro Commercial CoIn Stock: 966SMAJP4KE15CA-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the P4SMA15C are qualified based on the following critical parameters:

• Voltage - Reverse Standoff (Typ): 12.8V
• Voltage - Clamping (Max) @ Ipp: Within acceptable range (21.2V to 22.26V)
• Current - Peak Pulse (10/1000µs): 19.3A
• Power - Peak Pulse: 400W
• Package / Case: DO-214AC or SMA variants
• Mounting Type: Surface Mount
• Type: Zener
• Bidirectional Channels: 1

The substitute parts listed maintain electrical equivalence across these parameters while accommodating minor variations in clamping voltage and operating temperature ranges. All substitutes are available in compatible surface-mount packages suitable for direct board-level replacement.

Parameter Comparison

Engineering Selection Recommendations

P4SMA15CA (Eaton - Electronics Division) is the primary direct substitute. This part maintains identical reverse standoff voltage (12.8V) and peak pulse current (19.3A) specifications. The clamping voltage is 21.2V, which is within the functional range of the original P4SMA15C at 22.26V. The P4SMA15CA is actively manufactured and available in high inventory (5911 pcs), ensuring supply chain continuity. It carries RoHS compliance certification and is packaged in Tape & Reel format for automated assembly. The operating temperature range is -55 to 150°C, which covers the majority of industrial applications, though it does not extend to the lower -65°C limit of the original part.

SMAJP4KE15CA-TP (Micro Commercial Co) is the manufacturer-recommended alternative. This part meets all critical electrical parameters: 12.8V reverse standoff, 19.3A peak pulse current, and 400W peak pulse power. The clamping voltage is 21.2V. The SMAJP4KE15CA-TP offers an extended upper operating temperature range of -55 to 175°C, providing additional thermal margin for high-temperature applications. This part is actively produced with 916 pcs in stock and is REACH compliant. The package designation is DO-214AC (SMAJ), which is mechanically and electrically compatible with the original SMA footprint.

Selection between these substitutes should be based on supply availability, packaging requirements (Tape & Reel vs. Bulk), and specific operating temperature constraints of the target application.

Frequently Asked Questions (FAQ)

Q: Can P4SMA15CA be used as a direct replacement for P4SMA15C?

A: Yes. Both parts share identical reverse standoff voltage (12.8V) and peak pulse current (19.3A) specifications. The clamping voltage difference (21.2V vs. 22.26V) represents a 4.7% reduction, which is within acceptable tolerance for most general-purpose overvoltage protection circuits. Verify that your circuit design accommodates the lower clamping voltage before implementation.

Q: What is the difference between the SMA and SMAJ package designations?

A: Both SMA and SMAJ are DO-214AC package variants used for surface-mount TVS diodes. They are mechanically and electrically compatible and share the same footprint. The SMAJ designation is used by certain manufacturers as an internal classification. Either package can be used interchangeably on the same PCB layout.

Q: Why does the P4SMA15CA have a lower operating temperature minimum (-55°C vs. -65°C)?

A: The P4SMA15CA is specified for -55 to 150°C operation, while the original P4SMA15C extends to -65°C. If your application requires operation below -55°C, the SMAJP4KE15CA-TP, which also operates to -55°C minimum, is equally suitable. Verify your circuit's actual minimum operating temperature requirement before selecting a substitute.

Q: Are all substitute parts RoHS compliant?

A: The P4SMA15CA is RoHS compliant. The SMAJP4KE15CA-TP is REACH compliant. Both meet current environmental and regulatory standards for electronic components. Confirm compliance requirements with your procurement or quality assurance department.

Q: What packaging formats are available for these substitutes?

A: The P4SMA15CA is supplied in Tape & Reel (TR) format, suitable for automated pick-and-place assembly. The SMAJP4KE15CA-TP is supplied in Bulk format. Select based on your manufacturing process requirements and assembly equipment capabilities.

Q: Can I mix P4SMA15C, P4SMA15CA, and SMAJP4KE15CA-TP in the same production run?

A: Yes, provided your circuit design and PCB layout accommodate the electrical and mechanical specifications of all three parts. All three are surface-mount components with compatible footprints. However, for consistency and traceability, it is recommended to standardize on a single part number per production batch.