P4SMA82A-Q Equivalent & Substitute Parts

Part Overview

The P4SMA82A-Q is an active-status transient voltage suppressor (TVS) diode manufactured by Bourns Inc., designed for telecom applications requiring transient protection. This unidirectional zener diode operates with a reverse standoff voltage of 70.1V and provides clamping at 113V with a peak pulse current rating of 3.6A. The device is packaged in DO-214AC (SMA) surface mount format and meets automotive-grade AEC-Q101 qualification standards. Substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity while maintaining equivalent electrical and mechanical performance.

Substiute Parts

P4SMA82A-Q

Bourns Inc.In Stock: 965P4SMA82A-Q Datasheet

Current PartRFQ

SMAJE70AH

Eaton - Electronics DivisionIn Stock: 10893SMAJE70AH Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the P4SMA82A-Q are identified based on strict equivalence across the following critical parameters:

• Voltage Rating: Reverse standoff voltage within 70V to 70.1V range; breakdown voltage minimum 77.8V to 77.9V; clamping voltage at 113V
• Current Handling: Peak pulse current of 3.6A at 10/1000µs pulse width
• Power Dissipation: Peak pulse power of 400W
• Package Compatibility: DO-214AC / SMA surface mount format
• Thermal Performance: Operating temperature range -55°C to 150°C (TJ)
• Compliance & Certification: Automotive grade, AEC-Q101 qualified, ROHS3 compliant, REACH unaffected
• Functional Type: Unidirectional zener TVS diode with single channel
• Application Domain: Telecom transient protection

The SMAJE70AH from Eaton - Electronics Division meets all substitution criteria and is classified as an equivalent part.

Parameter Comparison

Engineering Selection Recommendations

Both the P4SMA82A-Q and SMAJE70AH are active-status products with identical electrical performance specifications and automotive-grade AEC-Q101 certification. Selection between these parts is based on the following engineering considerations:

P4SMA82A-Q (Bourns Inc.)

• Primary choice when Bourns supply chain or specific manufacturer qualification is required
• Current inventory: 923 pieces

SMAJE70AH (Eaton - Electronics Division)

• Equivalent substitute with identical electrical and thermal characteristics
• Suitable for applications where Eaton component qualification is acceptable
• Higher current inventory availability: 10,808 pieces
• Recommended for procurement flexibility and supply chain redundancy

Both parts satisfy automotive-grade requirements, maintain compliance with ROHS3 and REACH regulations, and operate across the full -55°C to 150°C temperature range. The MSL rating of 1 (Unlimited) for both parts indicates no moisture sensitivity constraints during storage or handling.

Frequently Asked Questions (FAQ)

Q: Can SMAJE70AH be used as a direct replacement for P4SMA82A-Q in production assemblies?

A: Yes. The SMAJE70AH meets all electrical, thermal, and mechanical specifications of the P4SMA82A-Q. Both devices are AEC-Q101 qualified, automotive-grade, and operate identically across the specified voltage and current ranges. Pin-to-pin compatibility and package dimensions are identical (DO-214AC / SMA).

Q: Are there differences in voltage ratings between these parts?

A: The reverse standoff voltages differ by 0.1V (70.1V vs. 70V), and breakdown voltages differ by 0.1V (77.9V vs. 77.8V). These variations fall within normal manufacturing tolerances for TVS diodes and do not affect functional equivalence in telecom transient protection applications.

Q: Do both parts have the same moisture sensitivity classification?

A: Yes. Both the P4SMA82A-Q and SMAJE70AH carry MSL rating 1 (Unlimited), indicating no moisture sensitivity constraints. Standard handling and storage procedures apply to both parts.

Q: What is the significance of AEC-Q101 qualification for these parts?

A: AEC-Q101 qualification certifies that both devices meet automotive industry reliability and quality standards. This qualification applies to both the Bourns and Eaton parts, confirming suitability for automotive and high-reliability telecom applications.

Q: Can these parts be used interchangeably in existing designs without circuit modification?

A: Yes. Identical clamping voltage (113V), peak pulse current (3.6A), and power dissipation (400W) specifications ensure functional interchangeability. No circuit redesign or component layout changes are required.

Q: What is the difference in available inventory between these parts?

A: P4SMA82A-Q has 923 pieces in stock, while SMAJE70AH has 10,808 pieces available. The higher inventory of the Eaton part supports extended production runs and supply chain continuity.

Q: Are there any compliance or regulatory differences between these parts?

A: Both parts are ROHS3 compliant and REACH unaffected. No regulatory or compliance barriers exist to substitution.