SMP26A-E3/85A Equivalent & Substitute Parts

Part Overview

The SMP26A-E3/85A is a unidirectional Transient Voltage Suppressor (TVS) diode from Vishay General Semiconductor - Diodes Division, designed for general-purpose overvoltage protection in surface-mount applications. This component operates with a 26V reverse standoff voltage and provides 42.1V maximum clamping voltage at peak pulse current of 9.5A, delivering 400W peak pulse power dissipation.

The SMP26A-E3/85A is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this TVS diode specification.

Substiute Parts

SMP26A-E3/85A

Vishay General Semiconductor - Diodes DivisionIn Stock: 958SMP26A-E3/85A Datasheet

Current PartRFQ

SMP26A-M3/85A

Vishay General Semiconductor - Diodes DivisionIn Stock: 12133SMP26A-M3/85A Datasheet

DirectRFQ

PTVS26VS1UR,115

Nexperia USA Inc.In Stock: 18929PTVS26VS1UR,115 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMP26A-E3/85A are identified based on electrical and mechanical parameter equivalence. The critical parameters determining substitutability are:

• Voltage - Reverse Standoff: 26V
• Voltage - Clamping (Max) @ Ipp: 42.1V
• Current - Peak Pulse (10/1000µs): 9.5A
• Power - Peak Pulse: 400W
• Operating Temperature Range: -55°C ~ 150°C
• Unidirectional Channels: 1
• Type: Zener
• RoHS Status: ROHS3 Compliant

Two substitute parts meet these electrical specifications:

SMP26A-M3/85A (Vishay General Semiconductor - Diodes Division): Identical electrical characteristics with active product status. Packaging differs as Tape & Reel (TR) versus the original's unspecified packaging.

PTVS26VS1UR,115 (Nexperia USA Inc.): Identical electrical characteristics with active product status and AEC-Q101 automotive qualification. Package format differs as SOD-123W versus the original's DO-220AA.

Parameter Comparison

Engineering Selection Recommendations

SMP26A-M3/85A is the primary substitute for direct replacement. This part maintains identical electrical specifications and the same DO-220AA package format as the original SMP26A-E3/85A. Both components are from the same manufacturer (Vishay General Semiconductor - Diodes Division) and share the TransZorb® and eSMP® series designation. The SMP26A-M3/85A holds active product status with significantly higher inventory availability (12,100 pcs), ensuring supply chain continuity. Packaging is specified as Tape & Reel (TR), which is standard for production environments.

PTVS26VS1UR,115 is an alternative substitute when package format compatibility permits. This Nexperia part delivers identical electrical performance and holds active product status with robust inventory (18,860 pcs). The component carries AEC-Q101 automotive qualification and ROHS3 compliance. The primary consideration is the package format change from DO-220AA to SOD-123W, which requires PCB layout and footprint verification before implementation.

Both substitutes maintain full electrical equivalence across all critical parameters: 26V reverse standoff voltage, 42.1V clamping voltage, 9.5A peak pulse current, and 400W peak pulse power dissipation. Both support the -55°C to 150°C operating temperature range and comply with ROHS3 and REACH requirements.

Frequently Asked Questions (FAQ)

Q: Can SMP26A-M3/85A be used as a direct replacement for SMP26A-E3/85A?

A: Yes. Both parts share identical electrical specifications, the same DO-220AA package format, and are from the same manufacturer. The primary difference is product status: SMP26A-M3/85A is active with higher inventory availability.

Q: What is the key difference between SMP26A-M3/85A and PTVS26VS1UR,115?

A: Both parts are electrically equivalent with identical voltage and current ratings. The primary difference is the package format: SMP26A-M3/85A uses DO-220AA, while PTVS26VS1UR,115 uses SOD-123W. Additionally, PTVS26VS1UR,115 carries AEC-Q101 automotive qualification and is manufactured by Nexperia rather than Vishay.

Q: Does package format affect electrical performance?

A: Package format does not affect the electrical performance specifications. However, it requires different PCB footprints and layout considerations. Verify PCB compatibility before selecting PTVS26VS1UR,115 as a substitute.

Q: Are all three parts RoHS compliant?

A: Yes. SMP26A-E3/85A, SMP26A-M3/85A, and PTVS26VS1UR,115 are all ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited).

Q: Why is SMP26A-E3/85A marked as obsolete?

A: Product obsolescence is determined by the manufacturer. SMP26A-M3/85A provides an active alternative with identical specifications and improved supply availability.

Q: Can PTVS26VS1UR,115 be used in automotive applications?

A: PTVS26VS1UR,115 carries AEC-Q101 automotive qualification, making it suitable for automotive applications. SMP26A-M3/85A does not carry this qualification.