P4SMA350CA Equivalent & Substitute Parts

Part Overview

The P4SMA350CA is a bidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This surface-mount component operates in the DO-214AC (SMA) package and is currently in active production status. The device provides 300V reverse standoff voltage with 482V maximum clamping voltage and 900mA peak pulse current capability, delivering 400W peak pulse power dissipation. Finding equivalent and substitute parts is necessary to ensure design flexibility, manage supply chain continuity, and accommodate alternative sourcing requirements while maintaining electrical and mechanical compatibility.

Substiute Parts

P4SMA350CA

Littelfuse Inc.In Stock: 10408P4SMA350CA Datasheet

Current PartRFQ

P4SMA350CA

Eaton - Electronics DivisionIn Stock: 10366P4SMA350CA Datasheet

MFR RecommendedRFQ

P4SMA350CA

Eaton - Electronics DivisionIn Stock: 10366P4SMA350CA Datasheet

MFR RecommendedRFQ

SMAJ300CA

MeritekIn Stock: 5114SMAJ300CA Datasheet

MFR RecommendedRFQ

SMAJ300CA-TP

Micro Commercial CoIn Stock: 5979SMAJ300CA-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the P4SMA350CA is determined by strict alignment of the following critical parameters:

• Voltage - Reverse Standoff (Typ): 300V
• Voltage - Clamping (Max) @ Ipp: 482V ± tolerance
• Current - Peak Pulse (10/1000µs): 900mA ± tolerance
• Power - Peak Pulse: 400W
• Package / Case: DO-214AC, SMA
• Mounting Type: Surface Mount
• Bidirectional Channels: 1
• Type: Zener

The substitute parts identified maintain these core electrical specifications within acceptable engineering tolerances. All candidates are active-status components in the same package configuration, ensuring mechanical and thermal compatibility with the original design.

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts maintain active product status and comply with RoHS and REACH regulations, ensuring regulatory continuity. The P4SMA350CA from Eaton - Electronics Division provides the closest electrical match with identical voltage clamping (482V) and peak pulse current (900mA) specifications, making it the primary direct substitute.

The SMAJ300CA variants from Meritek and Micro Commercial Co exhibit minor deviations in peak pulse current (820mA and 800mA respectively) and clamping voltage (486V), representing acceptable alternatives within typical design margins for general-purpose transient suppression applications. The SMAJ300CA-TP offers extended operating temperature range to 175°C, providing additional thermal headroom for demanding environments.

Selection should prioritize inventory availability, lead time requirements, and application-specific thermal constraints. All candidates are surface-mount components in DO-214AC (SMA) packaging, ensuring direct PCB compatibility without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the SMAJ300CA variants be used as direct replacements for the P4SMA350CA?

A: The SMAJ300CA and SMAJ300CA-TP are functionally compatible substitutes. They maintain the same 300V reverse standoff voltage, 400W peak pulse power, and DO-214AC (SMA) package configuration. Minor variations in peak pulse current (820mA/800mA versus 900mA) and clamping voltage (486V versus 482V) fall within acceptable engineering tolerances for general-purpose overvoltage protection circuits.

Q: What is the difference between the Littelfuse P4SMA350CA and the Eaton P4SMA350CA?

A: Both parts share identical part numbers and electrical specifications (482V clamping, 900mA peak pulse current, 400W power dissipation). The primary difference is manufacturer origin. The Eaton variant operates across a slightly narrower temperature range (-55°C to 150°C versus -65°C to 150°C for Littelfuse), which may be relevant for extreme low-temperature applications.

Q: Are all substitute parts available in the same packaging?

A: Yes. All identified substitutes use the DO-214AC (SMA) surface-mount package, ensuring mechanical and thermal compatibility. Tape & Reel (TR) packaging is available for the Littelfuse P4SMA350CA, Eaton P4SMA350CA, and Micro Commercial Co SMAJ300CA-TP, supporting automated assembly processes.

Q: Which substitute offers the best thermal performance?

A: The SMAJ300CA-TP from Micro Commercial Co provides the widest operating temperature range (-55°C to 175°C), offering superior thermal margin in high-temperature environments. The standard variants operate to 150°C, suitable for most industrial and telecommunications applications.

Q: Do all substitutes meet the same compliance standards?

A: All identified parts are RoHS compliant and REACH unaffected. The Littelfuse and Meritek variants carry ROHS3 certification, while the Eaton part carries general RoHS compliance. All maintain MSL 1 (Unlimited) moisture sensitivity rating, ensuring consistent handling and storage requirements.