SMF7.5AT1G Equivalent & Substitute Parts

Part Overview

The SMF7.5AT1G 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 7.5V reverse standoff voltage with a 12.9V maximum clamping voltage and 15.5A peak pulse current capability in a SOD-123F package. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

SMF7.5AT1G

Littelfuse Inc.In Stock: 10324SMF7.5AT1G Datasheet

Current PartRFQ

SMF7.5A

MDDIn Stock: 9125SMF7.5A Datasheet

DirectRFQ

SMF6.5A

MDDIn Stock: 23240SMF6.5A Datasheet

MFR RecommendedRFQ

SMF7.0A

MDDIn Stock: 18332SMF7.0A Datasheet

MFR RecommendedRFQ

SMF8.0A

Diotec SemiconductorIn Stock: 38424SMF8.0A Datasheet

MFR RecommendedRFQ

ATV02W7V5-HF

Comchip TechnologyIn Stock: 785ATV02W7V5-HF Datasheet

DirectRFQ

SMF7.5A-TP

Micro Commercial CoIn Stock: 7336SMF7.5A-TP Datasheet

DirectRFQ

SMF7V5A-E3-08

Vishay General Semiconductor - Diodes DivisionIn Stock: 20156SMF7V5A-E3-08 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SMF7.5AT1G is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

• Voltage - Reverse Standoff (Typ): 7.5V
• Voltage - Clamping (Max) @ Ipp: 12.9V
• Current - Peak Pulse (10/1000µs): 15.5A
• Power - Peak Pulse: 200W
• Unidirectional Channels: 1
• Mounting Type: Surface Mount
• Package / Case: SOD-123F or equivalent

Direct Equivalents maintain identical electrical specifications across all critical parameters and are suitable for one-to-one replacement.

Manufacturer-Recommended Alternatives provide similar voltage protection characteristics with minor variations in peak pulse current or clamping voltage, suitable for applications where the exact electrical specifications are not critical.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (Preferred for One-to-One Replacement):

SMF7.5A, ATV02W7V5-HF, SMF7.5A-TP, and SMF7V5A-E3-08 are direct electrical equivalents with identical reverse standoff voltage (7.5V), clamping voltage (12.9V), and peak pulse current (15.5A). All are ROHS3 compliant and MSL 1 rated. Selection among these should be based on availability, packaging format (tape & reel vs. bulk), and supplier lead times. SMF7.5A-TP and SMF7V5A-E3-08 offer extended operating temperature ranges (-65°C to 175°C) compared to the original specification.

Manufacturer-Recommended Alternatives:

SMF7.0A, SMF6.5A, and SMF8.0A provide alternative voltage protection levels within the same product family. These parts maintain the 200W power rating and surface-mount form factor but operate at different reverse standoff voltages. Selection of these alternatives requires circuit-level analysis to confirm compatibility with the intended protection scheme.

All substitute parts listed are ROHS3 compliant and carry MSL 1 ratings, ensuring compatibility with standard manufacturing processes.

Frequently Asked Questions (FAQ)

Q: Can SMF7.5A be used as a direct replacement for SMF7.5AT1G?

A: Yes. SMF7.5A is a direct electrical equivalent with identical reverse standoff voltage (7.5V), clamping voltage (12.9V), peak pulse current (15.5A), and power rating (200W). Both use SOD-123F packaging and are ROHS3 compliant.

Q: What is the difference between SMF7.5A-TP and SMF7.5A?

A: Both parts are electrically identical with 7.5V reverse standoff and 12.9V clamping voltage. SMF7.5A-TP is manufactured by Micro Commercial Co and offers an extended operating temperature range of -65°C to 175°C compared to -55°C to 150°C for the MDD version.

Q: Can SMF7.0A or SMF6.5A be used instead of SMF7.5AT1G?

A: SMF7.0A and SMF6.5A operate at lower reverse standoff voltages (7V and 6.5V respectively) with correspondingly lower clamping voltages (12V and 11.2V). These parts are suitable only if the circuit design permits operation at these lower voltage thresholds.

Q: Is ATV02W7V5-HF suitable for automotive applications?

A: ATV02W7V5-HF is qualified to AEC-Q101 automotive standards and carries the automotive grade designation. It is electrically equivalent to SMF7.5AT1G and suitable for automotive applications requiring this qualification.

Q: What is the package difference between SMF7V5A-E3-08 and other substitutes?

A: SMF7V5A-E3-08 uses DO-219AB (SMF) packaging, which is mechanically equivalent to SOD-123F but may have different land pattern specifications. Verify PCB footprint compatibility before selection.

Q: Are all substitute parts available in tape & reel packaging?

A: Most substitutes are available in tape & reel (TR) packaging. Verify specific packaging availability with your supplier, as some parts may be offered in multiple packaging formats.