SMF7.0AT1G Equivalent & Substitute Parts

Part Overview

The SMF7.0AT1G is a unidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component features a 7V reverse standoff voltage with a 12V maximum clamping voltage and 16.7A peak pulse current capability in a SOD-123FL package. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

SMF7.0AT1G

Littelfuse Inc.In Stock: 10223SMF7.0AT1G Datasheet

Current PartRFQ

SMF7.0A

MDDIn Stock: 18332SMF7.0A Datasheet

DirectRFQ

SMF7.0A-T13

Littelfuse Inc.In Stock: 1072SMF7.0A-T13 Datasheet

DirectRFQ

SMF6.5A

MDDIn Stock: 23240SMF6.5A Datasheet

MFR RecommendedRFQ

SMF7.5A

MDDIn Stock: 9125SMF7.5A Datasheet

MFR RecommendedRFQ

SMF8.0A

Diotec SemiconductorIn Stock: 38424SMF8.0A Datasheet

MFR RecommendedRFQ

SMF7.0A-TP

Micro Commercial CoIn Stock: 755SMF7.0A-TP Datasheet

DirectRFQ

SMF7V0A-E3-08

Vishay General Semiconductor - Diodes DivisionIn Stock: 39817SMF7V0A-E3-08 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SMF7.0AT1G is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

• Reverse standoff voltage: 7V (±tolerance acceptable within application requirements)
• Clamping voltage: 12V maximum at peak pulse current
• Peak pulse current: 16.7A minimum
• Power dissipation: 200W peak pulse
• Package compatibility: SOD-123F or equivalent surface-mount form factor
• Unidirectional operation: Single channel
• Type: Zener diode

Substitution Categories:

Direct Equivalents maintain identical electrical specifications and package form, differing only in manufacturer or packaging configuration (tape & reel vs. bulk).

Manufacturer-Recommended Alternatives provide comparable voltage and current ratings with minor parameter variations acceptable for general-purpose protection applications. These parts maintain the same power rating and operating temperature range compatibility.

Package Variants use alternative surface-mount packages (DO-219AB) that are mechanically compatible with SOD-123F footprints in most PCB designs.

Parameter Comparison

Engineering Selection Recommendations

Preferred Direct Substitutes:

SMF7.0A-T13 (Littelfuse Inc.) and SMF7.0A (MDD) are the primary substitutes, maintaining identical electrical specifications and SOD-123F packaging. Both are active products with full RoHS3 compliance and MSL 1 rating, ensuring long-term availability and regulatory compliance equivalent to the original SMF7.0AT1G.

SMF7.0A-TP (Micro Commercial Co) provides identical electrical performance with extended operating temperature range (-65°C to 175°C) and is suitable for applications requiring broader thermal performance margins.

SMF7V0A-E3-08 (Vishay General Semiconductor) offers identical electrical specifications with extended temperature range and uses the DO-219AB package, which is mechanically compatible with SOD-123F footprints. This part is available in high volume and carries active product status.

Alternative Substitutes with Parameter Variance:

SMF6.5A and SMF7.5A are manufacturer-recommended alternatives with voltage ratings bracketing the original specification. SMF6.5A provides lower standoff voltage (6.5V) with higher peak pulse current (17.9A), while SMF7.5A provides higher standoff voltage (7.5V) with lower peak pulse current (15.5A). Both maintain 200W power rating and SOD-123F packaging. Selection depends on specific circuit protection requirements.

SMF8.0A (Diotec Semiconductor) represents a higher voltage alternative (8V standoff, 13.6V clamping) with reduced peak pulse current (14.71A). This part is suitable only where circuit design tolerates higher clamping voltage.

Compliance Considerations:

All recommended substitutes maintain RoHS3 compliance and MSL 1 rating. SMF8.0A carries undefined REACH status and non-applicable RoHS designation; verify compliance requirements before selection for regulated applications.

Frequently Asked Questions (FAQ)

Q: Can SMF7.0A directly replace SMF7.0AT1G without PCB modification?

A: Yes. SMF7.0A and SMF7.0A-T13 are direct electrical and mechanical equivalents in SOD-123F packaging. No PCB layout changes are required. The primary difference is product status (active vs. obsolete) and packaging configuration (tape & reel vs. bulk).

Q: What is the difference between SMF7.0A-T13 and SMF7.0A-TP?

A: Both maintain identical electrical specifications (7V standoff, 12V clamping, 16.7A peak pulse). SMF7.0A-TP offers extended operating temperature range (-65°C to 175°C vs. -55°C to 150°C) and is supplied in bulk packaging. Selection depends on thermal requirements and packaging preferences.

Q: Can SMF7V0A-E3-08 be used as a direct replacement?

A: SMF7V0A-E3-08 provides identical electrical performance but uses DO-219AB packaging instead of SOD-123F. The footprints are mechanically compatible in most PCB designs. Verify PCB layout compatibility before substitution. This part offers extended temperature range (-65°C to 175°C) and higher inventory availability.

Q: When should SMF6.5A or SMF7.5A be selected instead of direct equivalents?

A: SMF6.5A and SMF7.5A are manufacturer-recommended alternatives for applications where voltage tolerance permits. SMF6.5A (6.5V standoff) provides higher current handling (17.9A) for circuits tolerating lower clamping voltage. SMF7.5A (7.5V standoff) provides higher voltage margin for circuits tolerating lower current capacity (15.5A). Consult circuit protection requirements before selection.

Q: Is SMF8.0A suitable for SMF7.0AT1G applications?

A: SMF8.0A is not recommended as a direct substitute. The higher standoff voltage (8V vs. 7V) and clamping voltage (13.6V vs. 12V) may exceed circuit protection thresholds. Use only where circuit design specifically accommodates higher voltage clamping.

Q: What packaging options are available for SMF7.0 equivalent parts?

A: Primary packaging is SOD-123F (SMF7.0A, SMF7.0A-T13, SMF7.0A-TP, SMF6.5A, SMF7.5A, SMF8.0A). Alternative packaging is DO-219AB (SMF7V0A-E3-08), which is mechanially compatible with SOD-123F PCB footprints. Verify PCB design compatibility before selecting alternative packages.

Q: Are all substitute parts RoHS3 compliant?

A: SMF7.0A, SMF7.0A-T13, SMF7.0A-TP, SMF6.5A, SMF7.5A, and SMF7V0A-E3-08 are RoHS3 compliant. SMF8.0A carries non-applicable RoHS designation. Verify compliance documentation for regulated applications.