Equivalent & Substitute Parts for P4SMA82A-E3/5A

Part Overview

The P4SMA82A-E3/5A is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the 70V reverse standoff range with a 113V maximum clamping voltage and 3.5A peak pulse current rating. The device is designed for general purpose transient voltage suppression applications and is currently in active production status with RoHS3 compliance and unlimited moisture sensitivity level (MSL 1).

Equivalent and substitute parts are identified when component availability is limited, supply chain disruptions occur, or design flexibility permits selection from qualified alternatives meeting the same electrical and mechanical specifications.

Substiute Parts

P4SMA82A-E3/5A

Vishay General Semiconductor - Diodes DivisionIn Stock: 833P4SMA82A-E3/5A Datasheet

Current PartRFQ

SMAJ70A

MDDIn Stock: 6118SMAJ70A Datasheet

DirectRFQ

SMAJ70A

MDDIn Stock: 6118SMAJ70A Datasheet

DirectRFQ

PTVS64VS1UR,115

Nexperia USA Inc.In Stock: 4379PTVS64VS1UR,115 Datasheet

MFR RecommendedRFQ

SMAJ70A-TR

STMicroelectronicsIn Stock: 2492SMAJ70A-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the P4SMA82A-E3/5A is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): 70V nominal range (70.1V for main part)
• Voltage - Clamping (Max) @ Ipp: 113V maximum
• Current - Peak Pulse (10/1000µs): 3.5A minimum
• Power - Peak Pulse: 400W
• Package / Case: DO-214AC (SMA) surface mount form factor
• Mounting Type: Surface mount
• RoHS Compliance: ROHS3 Compliant

Substitute parts are grouped into two categories based on electrical parameter alignment:

Category A - Direct Electrical Equivalents: Parts matching all critical voltage and current parameters within specified tolerances and maintaining identical package form factor.

Category B - Manufacturer-Recommended Alternatives: Parts recommended by original equipment manufacturers that meet core functional requirements but may exhibit variations in secondary parameters such as clamping voltage, peak pulse current, or package configuration.

Parameter Comparison

Engineering Selection Recommendations

SMAJ70A (MDD) and SMAJ70A-TR (STMicroelectronics) are direct electrical equivalents for the P4SMA82A-E3/5A in the DO-214AC (SMA) package. Both maintain the 70V reverse standoff voltage, 113V clamping voltage, and 3.5A peak pulse current specifications. The SMAJ70A-TR variant from STMicroelectronics offers an extended operating temperature range (-55°C minimum versus -50°C for MDD) and is qualified to AEC-Q101 automotive standards, making it suitable for applications requiring automotive-grade reliability.

PTVS64VS1UR,115 (Nexperia) is a manufacturer-recommended alternative with a lower reverse standoff voltage (64V) and reduced clamping voltage (103V). This part is qualified to AEC-Q101 automotive standards and features a different package form factor (SOD-123W). Selection of this alternative requires verification that the lower voltage ratings are compatible with the application circuit design.

All substitute parts maintain ROHS3 compliance, unlimited moisture sensitivity level (MSL 1), and active product status, ensuring long-term availability and regulatory alignment with the original component.

Frequently Asked Questions (FAQ)

Q: Can SMAJ70A (MDD) be used as a direct replacement for P4SMA82A-E3/5A?

A: Yes. The SMAJ70A maintains identical reverse standoff voltage (70V), clamping voltage (113V), peak pulse current (3.5A), and package form factor (DO-214AC, SMA). Both components are RoHS3 compliant and rated for surface mount assembly. The primary difference is the minimum operating temperature (-50°C for SMAJ70A versus -65°C for P4SMA82A-E3/5A).

Q: What is the difference between SMAJ70A and SMAJ70A-TR?

A: Both parts share identical electrical specifications (70V standoff, 113V clamping, 3.5A peak pulse current) and the same DO-214AC (SMA) package. The SMAJ70A-TR from STMicroelectronics extends the minimum operating temperature to -55°C and includes AEC-Q101 automotive qualification, making it suitable for automotive and high-reliability applications.

Q: Why is PTVS64VS1UR,115 listed as a substitute if it has lower voltage ratings?

A: PTVS64VS1UR,115 is designated as a manufacturer-recommended alternative by Nexperia. While it operates at a lower reverse standoff voltage (64V) and clamping voltage (103V), it maintains the same 400W peak pulse power rating and includes AEC-Q101 automotive qualification. This part is suitable only for applications where the lower voltage specifications are compatible with circuit requirements.

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

A: SMAJ70A (MDD) and SMAJ70A-TR (STMicroelectronics) are available in the DO-214AC (SMA) package, matching the original P4SMA82A-E3/5A. PTVS64VS1UR,115 (Nexperia) uses the SOD-123W package, which is a different form factor and requires PCB layout modification.

Q: Do all substitute parts meet RoHS3 compliance?

A: Yes. All listed substitute parts—SMAJ70A (MDD), SMAJ70A-TR (STMicroelectronics), and PTVS64VS1UR,115 (Nexperia)—are RoHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Q: Which substitute part is recommended for automotive applications?

A: SMAJ70A-TR (STMicroelectronics) is qualified to AEC-Q101 automotive standards and is the recommended choice for automotive-grade applications. PTVS64VS1UR,115 (Nexperia) also carries AEC-Q101 qualification but with lower voltage specifications.