SMF48A-M3-18 Equivalent & Substitute Parts

Part Overview

The SMF48A-M3-18 is a unidirectional Transient Voltage Suppressor (TVS) diode from Vishay General Semiconductor - Diodes Division, designed for general-purpose overvoltage protection applications. This surface-mount component operates in the 48V reverse standoff voltage range with a maximum clamping voltage of 77.4V and peak pulse current capability of 2.6A. The part is currently active in production with full RoHS3 compliance and unlimited moisture sensitivity rating. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and design continuity across manufacturing environments.

Substiute Parts

SMF48A-M3-18

Vishay General Semiconductor - Diodes DivisionIn Stock: 1193SMF48A-M3-18 Datasheet

Current PartRFQ

SMF48A-E3-08

Vishay General Semiconductor - Diodes DivisionIn Stock: 16557SMF48A-E3-08 Datasheet

DirectRFQ

SMF48A-TP

Micro Commercial CoIn Stock: 4786SMF48A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMF48A-M3-18 are qualified based on electrical parameter equivalence and mechanical compatibility. The critical parameters determining substitution eligibility are:

• Voltage - Reverse Standoff: 48V (nominal)
• Voltage - Breakdown (Min): 53.3V
• Voltage - Clamping (Max) @ Ipp: 77.4V
• Current - Peak Pulse (10/1000µs): 2.6A
• Power - Peak Pulse: 200W
• Type: Zener, Unidirectional
• Operating Temperature: -65°C ~ 175°C
• RoHS3 Compliance and MSL 1 rating

Two substitute parts meet these electrical specifications. The SMF48A-E3-08 from Vishay maintains identical electrical characteristics and packaging format (DO-219AB). The SMF48A-TP from Micro Commercial Co provides electrical equivalence but uses an alternative package format (SOD-123FL), requiring PCB layout verification before implementation.

Parameter Comparison

Engineering Selection Recommendations

All three parts maintain active product status with full RoHS3 compliance and MSL 1 rating, ensuring regulatory and environmental compatibility across applications.

SMF48A-E3-08 is the primary substitute option. It is manufactured by Vishay, the same supplier as the main part, and maintains identical electrical specifications and DO-219AB package format. This part requires no PCB layout modifications and provides direct functional equivalence with 16,451 units in stock.

SMF48A-TP is a secondary substitute from Micro Commercial Co. While electrical parameters are fully equivalent, the SOD-123FL package differs from the DO-219AB format of the main part. Implementation of this substitute requires verification of PCB footprint compatibility and thermal management characteristics before design release.

Frequently Asked Questions (FAQ)

Q: Can SMF48A-E3-08 be used as a direct replacement for SMF48A-M3-18?

A: Yes. Both parts are manufactured by Vishay with identical electrical specifications (48V standoff, 77.4V clamping, 2.6A peak pulse current, 200W peak power) and the same DO-219AB package format. No design modifications are required.

Q: What is the key difference between SMF48A-TP and the main part?

A: The SMF48A-TP uses a SOD-123FL package instead of DO-219AB. Electrical performance is equivalent, but PCB footprint and thermal characteristics differ. Layout verification is necessary before substitution.

Q: Are all three parts RoHS3 compliant?

A: Yes. SMF48A-M3-18, SMF48A-E3-08, and SMF48A-TP all carry ROHS3 Compliant status with MSL 1 (Unlimited) moisture sensitivity rating.

Q: What operating temperature range applies to these parts?

A: All three parts operate across -65°C to 175°C. The SMF48A-M3-18 and SMF48A-E3-08 specify this as junction temperature (TJ), while SMF48A-TP specifies ambient temperature (TA).

Q: Can these parts be used interchangeably in high-reliability applications?

A: SMF48A-E3-08 provides direct interchangeability with no design changes. SMF48A-TP requires PCB layout verification due to package differences. All parts meet the same electrical and compliance requirements for general-purpose overvoltage protection.