P4SMA510C Equivalent & Substitute Parts

Part Overview

The P4SMA510C is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This bidirectional Zener diode operates with a reverse standoff voltage of 434V and provides clamping at 732.9V maximum. The part is currently listed as obsolete, making equivalent substitutes necessary for ongoing design support and procurement.

Substiute Parts

P4SMA510C

Littelfuse Inc.In Stock: 1070P4SMA510C Datasheet

Current PartRFQ

P4SMA510CA

Littelfuse Inc.In Stock: 23766P4SMA510CA Datasheet

MFR RecommendedRFQ

P4SMA510CA

Littelfuse Inc.In Stock: 23766P4SMA510CA Datasheet

MFR RecommendedRFQ

SMAJ434CA

Bourns Inc.In Stock: 879SMAJ434CA Datasheet

MFR RecommendedRFQ

SMAJP4KE510CA-TP

Micro Commercial CoIn Stock: 1146SMAJP4KE510CA-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the P4SMA510C is determined by the following critical parameters:

• Reverse Standoff Voltage: 434V (must match)
• Peak Pulse Current: 600mA (must match)
• Peak Pulse Power: 400W (must match)
• Package / Case: DO-214AC, SMA (must match)
• Mounting Type: Surface Mount (must match)
• Bidirectional Channels: 1 (must match)

The substitute parts listed below maintain these core electrical and mechanical specifications. Variations in clamping voltage (698V vs. 732.9V) and operating temperature ranges are within acceptable tolerance for general-purpose TVS applications where the primary function is transient suppression at the specified standoff and peak current levels.

Parameter Comparison

Engineering Selection Recommendations

P4SMA510CA is the primary recommended substitute. It is manufactured by Littelfuse Inc., the original manufacturer of the P4SMA510C, and maintains identical reverse standoff voltage, peak pulse current, and power specifications. The part is in active production status with substantial inventory availability (23,750 pcs). It carries ROHS3 compliance and unlimited moisture sensitivity rating, matching the original part's environmental qualifications.

SMAJ434CA from Bourns Inc. provides an alternative from an established TVS manufacturer. This part meets all critical electrical parameters and is in active production. Operating temperature range is reduced to -55°C minimum, which may require thermal evaluation for applications requiring the original -65°C lower limit. REACH status is listed as affected, requiring compliance verification for regulated markets.

SMAJP4KE510CA-TP from Micro Commercial Co offers the widest operating temperature range (-55°C ~ 175°C), providing additional thermal margin for high-temperature applications. This part is in active production with adequate inventory. RoHS and moisture sensitivity certifications are not specified in the provided data.

Frequently Asked Questions (FAQ)

Q: Can P4SMA510CA directly replace P4SMA510C in existing designs?

A: Yes. P4SMA510CA maintains identical reverse standoff voltage (434V), peak pulse current (600mA), peak pulse power (400W), and package configuration (DO-214AC SMA). The clamping voltage difference (698V vs. 732.9V) represents a 4.8% reduction, which is within typical design margins for transient suppression circuits. Both parts are manufactured by Littelfuse Inc. and carry equivalent compliance certifications.

Q: What is the significance of the clamping voltage difference between P4SMA510C and the substitute parts?

A: The P4SMA510C specifies a maximum clamping voltage of 732.9V at peak pulse current, while all substitute parts specify 698V. This 34.9V difference represents the maximum voltage the diode will clamp transients to under specified pulse conditions. For general-purpose protection applications, this variation is acceptable. Circuit designers should verify that the lower clamping voltage of 698V remains within the maximum voltage rating of protected components.

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

A: Yes. All substitute parts use DO-214AC (SMA) surface-mount packaging, ensuring mechanical and thermal compatibility with existing PCB layouts. P4SMA510CA and SMAJP4KE510CA-TP are available in Tape & Reel and Bulk packaging respectively, while SMAJ434CA is supplied in Tape & Reel format.

Q: Which substitute part should be selected for applications requiring -65°C minimum operating temperature?

A: P4SMA510CA is the only substitute that maintains the original -65°C minimum operating temperature specification. SMAJ434CA and SMAJP4KE510CA-TP specify -55°C minimum, which may be insufficient for applications requiring full military or extended temperature range operation.

Q: What compliance certifications should be verified before selecting a substitute?

A: All three substitute parts carry ROHS3 compliance. P4SMA510CA and SMAJ434CA specify MSL 1 (Unlimited) moisture sensitivity rating. SMAJ434CA is marked as REACH Affected, requiring verification of regulatory compliance for the intended market. SMAJP4KE510CA-TP does not specify RoHS or MSL certifications in the provided data and should be verified with the manufacturer before use in regulated applications.