P4SMA250 Equivalent & Substitute Parts

Part Overview

The P4SMA250 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection in surface-mount applications. This component features a 214V reverse standoff voltage, 361.2V maximum clamping voltage, and 400W peak pulse power rating in a DO-214AC (SMA) package. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

P4SMA250

Littelfuse Inc.In Stock: 868P4SMA250 Datasheet

Current PartRFQ

P4SMA250A

Eaton - Electronics DivisionIn Stock: 23783P4SMA250A Datasheet

DirectRFQ

P4SMA250A

Eaton - Electronics DivisionIn Stock: 23783P4SMA250A Datasheet

DirectRFQ

P4SMA250A-M3/5A

Vishay General Semiconductor - Diodes DivisionIn Stock: 1076P4SMA250A-M3/5A Datasheet

MFR RecommendedRFQ

SMAJP4KE250A-TP

Micro Commercial CoIn Stock: 1063SMAJP4KE250A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the P4SMA250 is determined by the following critical electrical and mechanical parameters:

• Reverse standoff voltage: 214V (typical)
• Breakdown voltage minimum: 225.15V or higher
• Maximum clamping voltage: within acceptable range for circuit protection
• Peak pulse current capability: 1.2A or higher
• Peak pulse power: 400W or higher
• Package type: DO-214AC (SMA) surface mount
• Unidirectional configuration: single channel
• Operating temperature range: compatible with application requirements

The substitute parts listed maintain these core electrical specifications and package compatibility, ensuring functional equivalence in transient voltage suppression applications.

Parameter Comparison

Engineering Selection Recommendations

P4SMA250A (Eaton - Electronics Division): This direct equivalent maintains identical reverse standoff voltage (214V), peak pulse current (1.2A), and power rating (400W). The part is in active production status with RoHS compliance. The clamping voltage is 344V compared to the original 361.2V, representing a 4.8% reduction. Operating temperature range is -55°C to 150°C, which is narrower at the lower end than the original specification.

P4SMA250A-M3/5A (Vishay General Semiconductor - Diodes Division): This manufacturer-recommended substitute maintains the same reverse standoff voltage and clamping voltage specifications as the Eaton equivalent. Peak pulse current is reduced to 870mA (72.5% of original), and peak pulse power is 300W (75% of original). Operating temperature range matches the original at -65°C to 150°C. ROHS3 compliance is confirmed.

SMAJP4KE250A-TP (Micro Commercial Co): This substitute provides identical reverse standoff voltage, breakdown voltage, clamping voltage, peak pulse current (1.2A), and power rating (400W) to the original specification. Operating temperature range extends to 175°C at the upper limit. REACH compliance is confirmed as unaffected.

Selection should prioritize parts with active product status and full compliance certifications. The Eaton and Micro Commercial Co options provide the closest electrical match to the original P4SMA250 specifications.

Frequently Asked Questions (FAQ)

Q: Can P4SMA250A (Eaton) be used as a direct replacement for P4SMA250 (Littelfuse)?

A: Yes. Both parts share identical reverse standoff voltage (214V), peak pulse current (1.2A), and power rating (400W) in the same DO-214AC (SMA) package. The clamping voltage difference (344V vs 361.2V) is within acceptable tolerance for most transient suppression applications. Verify circuit requirements for the specific application.

Q: What is the difference between P4SMA250A-M3/5A and the other substitutes?

A: The Vishay part has reduced peak pulse current (870mA vs 1.2A) and reduced power rating (300W vs 400W). This makes it suitable for lower-energy transient events. All other electrical parameters remain compatible. Use this substitute only when circuit peak pulse current requirements do not exceed 870mA.

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

A: Yes. All listed substitutes use the DO-214AC (SMA) surface-mount package, ensuring mechanical and footprint compatibility with the original P4SMA250 design.

Q: What compliance certifications should I verify for my application?

A: All substitute parts are RoHS compliant. The Littelfuse original and Vishay substitute are ROHS3 compliant. Verify REACH compliance requirements for your specific end-use application and region.

Q: Does operating temperature range affect substitution suitability?

A: Operating temperature range should match or exceed your circuit's thermal requirements. The Micro Commercial Co part extends to 175°C, providing the widest range. The Eaton part has a lower minimum temperature (-55°C vs -65°C). Confirm your application's operating temperature envelope before selection.