SMF58A-M3-18 Equivalent & Substitute Parts

Part Overview

The SMF58A-M3-18 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 a 58V reverse standoff voltage and 95V maximum clamping voltage. The part is currently in active production status and is RoHS3 compliant. Equivalent and substitute parts may be required due to inventory availability, packaging preferences, or specific application constraints while maintaining electrical and mechanical compatibility.

Substiute Parts

SMF58A-M3-18

Vishay General Semiconductor - Diodes DivisionIn Stock: 941SMF58A-M3-18 Datasheet

Current PartRFQ

SMF58A-E3-08

Vishay General Semiconductor - Diodes DivisionIn Stock: 39915SMF58A-E3-08 Datasheet

DirectRFQ

SMF58A-TP

Micro Commercial CoIn Stock: 3429SMF58A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMF58A-M3-18 are qualified based on the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Voltage - Reverse Standoff (Typ): 58V
• Voltage - Breakdown (Min): 64.4V
• Current - Peak Pulse (10/1000µs): 2.1A
• Power - Peak Pulse: 200W
• Type: Zener, Unidirectional

Mechanical Compatibility Criteria:

• Mounting Type: Surface Mount
• Applications: General Purpose
• Operating Temperature Range: -65°C ~ 175°C

Compliance Criteria:

• RoHS Status: ROHS3 Compliant
• Product Status: Active

Substitute parts must maintain identical or functionally equivalent electrical performance within the specified voltage and current parameters. Package variations are permitted when mechanical fit and thermal characteristics remain suitable for the application.

Parameter Comparison

Engineering Selection Recommendations

SMF58A-E3-08 (Direct Manufacturer Equivalent): This part is manufactured by Vishay General Semiconductor - Diodes Division and maintains identical electrical specifications to the SMF58A-M3-18. Both parts share the same DO-219AB package, eSMP® series designation, and junction temperature rating. This substitute provides direct compatibility with no design modifications required. Higher inventory availability (39,900 pcs) supports supply chain flexibility.

SMF58A-TP (Manufacturer-Recommended Substitute): This part is manufactured by Micro Commercial Co and meets the core electrical requirements with a maximum clamping voltage of 93.6V, which is within acceptable tolerance of the primary part's 95V specification. The package differs (SOD-123F versus DO-219AB), requiring PCB layout verification. Both parts maintain identical reverse standoff voltage, breakdown voltage, peak pulse current, and power dissipation ratings. All parts are ROHS3 compliant and in active production status.

Frequently Asked Questions (FAQ)

Q: Can SMF58A-E3-08 be used as a direct replacement for SMF58A-M3-18? A: Yes. Both parts are manufactured by Vishay and share identical electrical specifications, package type (DO-219AB), and operating temperature range. No circuit modifications are required.

Q: What is the key difference between SMF58A-M3-18 and SMF58A-TP? A: The primary difference is the package type: SMF58A-M3-18 uses DO-219AB while SMF58A-TP uses SOD-123F. The clamping voltage also differs slightly (95V versus 93.6V). PCB layout and footprint compatibility must be verified before substitution.

Q: Are all three parts RoHS3 compliant? A: Yes. SMF58A-M3-18, SMF58A-E3-08, and SMF58A-TP are all ROHS3 compliant with MSL rating of 1 (Unlimited).

Q: What parameters must remain constant for substitution? A: Reverse standoff voltage (58V), breakdown voltage (64.4V minimum), peak pulse current (2.1A), and power dissipation (200W) must be maintained. Operating temperature range and RoHS compliance status must also be preserved.

Q: Can SMF58A-TP be used if PCB layout uses DO-219AB footprint? A: No. SMF58A-TP uses SOD-123F package, which has different pin spacing and footprint dimensions. PCB redesign is required for this substitution.