SMF8.0AT1G Transient Voltage Suppressor Equivalent & Substitute Parts

Part Overview

The SMF8.0AT1G 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 an 8V reverse standoff voltage with a 13.6V maximum clamping voltage and 14.7A peak pulse current capability in a SOD-123FL package. The part is classified as obsolete, necessitating identification of active equivalent and substitute components that maintain electrical and mechanical compatibility for new designs or production continuity.

Substiute Parts

SMF8.0AT1G

Littelfuse Inc.In Stock: 16417SMF8.0AT1G Datasheet

Current PartRFQ

SMF8.0A

Diotec SemiconductorIn Stock: 38424SMF8.0A Datasheet

DirectRFQ

SMF6.5A

MDDIn Stock: 23240SMF6.5A Datasheet

MFR RecommendedRFQ

SMF7.0A

MDDIn Stock: 18332SMF7.0A Datasheet

MFR RecommendedRFQ

SMF7.5A

MDDIn Stock: 9125SMF7.5A Datasheet

MFR RecommendedRFQ

SMF8.0A-TP

Micro Commercial CoIn Stock: 2319SMF8.0A-TP Datasheet

DirectRFQ

SMF8V0A-E3-08

Vishay General Semiconductor - Diodes DivisionIn Stock: 5309SMF8V0A-E3-08 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMF8.0AT1G is determined by the following critical electrical parameters: reverse standoff voltage (8V nominal), breakdown voltage minimum (8.89V), maximum clamping voltage (13.6V), peak pulse current (14.7A), and peak pulse power (200W). Mechanical compatibility requires surface-mount packaging in SOD-123F or equivalent form factor. All substitute parts must maintain unidirectional operation with a single channel configuration and general-purpose application suitability.

Substitute parts are grouped into two categories:

Direct Electrical Equivalents maintain identical or near-identical electrical specifications (8V standoff, 13.6V clamp, 14.7A peak pulse) with active product status and full compliance certifications.

Voltage-Variant Alternatives provide lower voltage ratings (6.5V or 7.0V or 7.5V standoff) suitable for applications requiring reduced clamping thresholds while maintaining the 200W power rating and surface-mount package compatibility.

Parameter Comparison

Engineering Selection Recommendations

Primary Direct Equivalents: SMF8.0A (Diotec Semiconductor) and SMF8.0A-TP (Micro Commercial Co) are direct electrical equivalents with identical 8V standoff and 13.6V clamping specifications. Both are active products with ROHS3 compliance and REACH unaffected status. SMF8.0A-TP offers extended operating temperature range (-65°C ~ 175°C) compared to the original specification (-55°C ~ 150°C), providing enhanced thermal margin. SMF8V0A-E3-08 (Vishay) maintains identical electrical parameters with eSMP® series designation and DO-219AB package compatibility, suitable for applications where package footprint variation is acceptable.

Voltage-Variant Alternatives: SMF7.5A, SMF7.0A, and SMF6.5A (all MDD) provide lower voltage ratings suitable for applications requiring reduced overvoltage thresholds. These parts maintain 200W peak pulse power and surface-mount compatibility. Selection among voltage variants depends on circuit protection requirements and acceptable clamping voltage limits.

All substitute parts listed carry ROHS3 compliance and REACH unaffected status, matching the regulatory posture of the original component.

Frequently Asked Questions (FAQ)

Q: Can SMF8.0A directly replace SMF8.0AT1G in existing designs? A: Yes. SMF8.0A maintains identical reverse standoff voltage (8V), breakdown voltage (8.8V minimum), clamping voltage (13.6V), and peak pulse current (14.71A) specifications. Both use SOD-123F packaging. The operating temperature range differs slightly (-50°C ~ 150°C vs. -55°C ~ 150°C), which is acceptable for most applications.

Q: What is the difference between SMF8.0A-TP and SMF8.0A? A: SMF8.0A-TP is manufactured by Micro Commercial Co and offers an extended operating temperature range (-65°C ~ 175°C) compared to Diotec's SMF8.0A (-50°C ~ 150°C). Electrical specifications are identical. The extended temperature range provides additional thermal margin for high-temperature environments.

Q: Why would I select SMF7.5A or SMF7.0A instead of SMF8.0A? A: Lower voltage-rated variants (SMF7.5A, SMF7.0A, SMF6.5A) are selected when circuit protection requirements specify lower overvoltage thresholds. These parts clamp at lower voltages (12.9V, 12V, and 11.2V respectively) while maintaining 200W peak pulse power. Selection depends on the protected circuit's maximum allowable voltage specification.

Q: Is SMF8V0A-E3-08 compatible with SMF8.0AT1G? A: Electrically, yes. SMF8V0A-E3-08 maintains identical 8V standoff, 8.89V breakdown, and 13.6V clamping specifications. However, it uses DO-219AB (SMF) package instead of SOD-123F. PCB footprint compatibility must be verified before substitution.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts carry ROHS3 compliance and REACH unaffected status, matching the regulatory requirements of the original SMF8.0AT1G component.

Q: What is the significance of the 10/1000µs pulse specification? A: This specification defines the peak pulse current rating under a specific transient waveform: 10µs rise time and 1000µs pulse width. All listed parts maintain 14.7A or higher peak pulse current under this standard test condition, ensuring adequate transient suppression capability.