SMP11A-E3/85A Equivalent & Substitute Parts

Part Overview

The SMP11A-E3/85A is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This component is designed for general-purpose transient voltage protection applications, featuring an 11V reverse standoff voltage and 18.2V maximum clamping voltage. The part is currently classified as obsolete, making identification of equivalent and substitute components essential for ongoing design support and procurement.

Substiute Parts

SMP11A-E3/85A

Vishay General Semiconductor - Diodes DivisionIn Stock: 774SMP11A-E3/85A Datasheet

Current PartRFQ

SMP11A-M3/85A

Vishay General Semiconductor - Diodes DivisionIn Stock: 12347SMP11A-M3/85A Datasheet

DirectRFQ

PTVS11VS1UR,115

Nexperia USA Inc.In Stock: 18874PTVS11VS1UR,115 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SMP11A-E3/85A is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff: 11V (Typ)
• Voltage - Clamping (Max) @ Ipp: 18.2V
• Current - Peak Pulse: 22A
• Power - Peak Pulse: 400W
• Operating Temperature Range: -55°C ~ 150°C
• Unidirectional Channels: 1
• Type: Zener

Substitute parts must maintain identical electrical performance within these specifications. Package differences are permitted when mechanical compatibility with the circuit board layout can be accommodated.

Parameter Comparison

Engineering Selection Recommendations

SMP11A-M3/85A is the direct equivalent substitute from Vishay General Semiconductor - Diodes Division. This part maintains identical electrical specifications and package configuration (DO-220AA) to the obsolete SMP11A-E3/85A. The primary distinction is product status: SMP11A-M3/85A is active with significantly higher inventory availability (12,300 pcs vs. 705 pcs). This part is suitable for direct replacement without circuit board redesign.

PTVS11VS1UR,115 is a manufacturer-recommended alternative from Nexperia USA Inc. This part maintains all critical electrical parameters but uses a different surface-mount package (SOD-123W instead of DO-220AA). This substitute requires circuit board layout modification to accommodate the different package footprint. PTVS11VS1UR,115 carries AEC-Q101 automotive qualification, providing additional compliance documentation for applications requiring automotive-grade components. Both parts are ROHS3 compliant and carry identical moisture sensitivity ratings.

Frequently Asked Questions (FAQ)

Q: Can SMP11A-M3/85A be used as a direct replacement for SMP11A-E3/85A?

A: Yes. SMP11A-M3/85A is electrically and mechanically identical to SMP11A-E3/85A. Both use the DO-220AA package and maintain the same voltage, current, and power specifications. The only difference is product status and packaging format (Tape & Reel for SMP11A-M3/85A).

Q: What is the primary difference between SMP11A-M3/85A and PTVS11VS1UR,115?

A: The electrical specifications are identical. The primary difference is the package type: SMP11A-M3/85A uses DO-220AA, while PTVS11VS1UR,115 uses SOD-123W. This package difference requires circuit board layout modification for PTVS11VS1UR,115 substitution.

Q: Can PTVS11VS1UR,115 be used without circuit board redesign?

A: No. PTVS11VS1UR,115 uses a different surface-mount package (SOD-123W) than the original SMP11A-E3/85A (DO-220AA). Circuit board layout modification is required to accommodate the different footprint.

Q: Are all three parts RoHS compliant?

A: Yes. SMP11A-E3/85A, SMP11A-M3/85A, and PTVS11VS1UR,115 are all ROHS3 compliant.

Q: What is the operating temperature range for these TVS diodes?

A: All three parts operate across -55°C to 150°C. SMP11A-E3/85A and SMP11A-M3/85A specify this as junction temperature (TJ), while PTVS11VS1UR,115 specifies ambient temperature (TA).