P4SMA15A-Q Equivalent & Substitute Parts

Part Overview

The P4SMA15A-Q is a unidirectional transient voltage suppressor (TVS) diode manufactured by Bourns Inc., designed for telecom applications requiring transient overvoltage protection. This surface mount component operates with a reverse standoff voltage of 12.8V and provides clamping at 21.2V maximum. The device is actively produced, AEC-Q101 qualified for automotive applications, and RoHS3 compliant. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained within the specified parameter ranges for this product category.

Substiute Parts

P4SMA15A-Q

Bourns Inc.In Stock: 753P4SMA15A-Q Datasheet

Current PartRFQ

SMAJE12AH

Eaton - Electronics DivisionIn Stock: 4921SMAJE12AH Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of TVS diodes is determined by electrical parameter compatibility within defined tolerances and mechanical interchangeability. The P4SMA15A-Q operates in the 12.8V reverse standoff class with unidirectional protection topology. Substitute parts must satisfy the following criteria:

Critical Substitution Parameters:

• Unidirectional channel configuration (1 channel)
• Reverse standoff voltage within the 12V to 12.8V range
• Clamping voltage not exceeding 21.2V at peak pulse current
• Peak pulse current capability of 19.3A or greater
• Peak pulse power rating of 400W or greater
• Surface mount package (DO-214AC / SMA form factor)
• Operating temperature range of -55°C to 150°C or broader
• Automotive grade with AEC-Q101 qualification
• RoHS3 compliance

The SMAJE12AH from Eaton - Electronics Division meets these criteria with a 12V reverse standoff voltage, 19.9V clamping voltage, and 20.1A peak pulse current capability, maintaining functional equivalence within the specified parameter envelope.

Parameter Comparison

Engineering Selection Recommendations

Both the P4SMA15A-Q and SMAJE12AH are active production components with identical automotive grade designation and AEC-Q101 qualification status. Both devices maintain RoHS3 compliance and MSL Level 1 moisture sensitivity classification. The SMAJE12AH operates at a lower reverse standoff voltage (12V versus 12.8V) and achieves a lower maximum clamping voltage (19.9V versus 21.2V), while delivering marginally higher peak pulse current (20.1A versus 19.3A). Both components share identical peak pulse power ratings of 400W and identical operating temperature ranges of -55°C to 150°C. The mechanical compatibility is confirmed through identical DO-214AC (SMA) surface mount packaging. Selection between these parts is determined by circuit-specific voltage requirements and the availability of inventory from either manufacturer.

Frequently Asked Questions (FAQ)

Q: Can SMAJE12AH directly replace P4SMA15A-Q in existing designs?

A: Direct replacement is possible when the circuit design accommodates the lower reverse standoff voltage (12V versus 12.8V) and lower clamping voltage (19.9V versus 21.2V) of the SMAJE12AH. Both devices share identical mechanical packaging (DO-214AC / SMA), surface mount configuration, and thermal operating range. Verification of circuit voltage thresholds is required before substitution.

Q: What are the key electrical differences between these parts?

A: The P4SMA15A-Q specifies a 12.8V reverse standoff voltage with 21.2V maximum clamping, while the SMAJE12AH specifies 12V reverse standoff with 19.9V maximum clamping. Peak pulse current ratings are comparable (19.3A versus 20.1A). Both devices maintain 400W peak pulse power dissipation capability.

Q: Are both parts qualified for automotive applications?

A: Both the P4SMA15A-Q and SMAJE12AH carry automotive grade designation with AEC-Q101 qualification, confirming suitability for automotive transient protection circuits.

Q: Do these parts have identical packaging and mounting requirements?

A: Both components use DO-214AC (SMA) surface mount packaging with identical mechanical dimensions and land pattern compatibility. Moisture sensitivity level is identical at MSL Level 1 (Unlimited), requiring no special handling precautions.

Q: What compliance standards apply to both parts?

A: Both devices are RoHS3 compliant and REACH unaffected. ECCN classification is EAR99 for both parts, with identical HTSUS code 8541.10.0080.