SM15T15A-M3/9AT Equivalent & Substitute Parts

Part Overview

The SM15T15A-M3/9AT is a unidirectional transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This component operates as a Zener-type TVS device in the DO-214AB (SMC) surface mount package, designed for general-purpose transient voltage protection applications. The device is currently in active product status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Equivalent and substitute parts are identified based on matching electrical performance parameters and mechanical compatibility within the TVS diode category.

Substiute Parts

SM15T15A-M3/9AT

Vishay General Semiconductor - Diodes DivisionIn Stock: 869SM15T15A-M3/9AT Datasheet

Current PartRFQ

1.5SMC15A

Good-Ark SemiconductorIn Stock: 80821.5SMC15A Datasheet

MFR RecommendedRFQ

1.5SMC15A

Good-Ark SemiconductorIn Stock: 80821.5SMC15A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SM15T15A-M3/9AT are identified based on the following critical electrical and mechanical parameters:

• Voltage Rating Match: Reverse standoff voltage of 12.8V, breakdown voltage minimum of 14.3V, and clamping voltage maximum of 21.2V
• Current Handling: Peak pulse current of 70.8A to 71A at 10/1000µs pulse width
• Power Dissipation: 1500W peak pulse power rating
• Package Compatibility: DO-214AB (SMC) surface mount package
• Device Type: Unidirectional Zener TVS diode with single channel configuration
• Compliance: RoHS3 compliance and MSL 1 rating

The 1.5SMC15A from Good-Ark Semiconductor meets all substitution criteria within the allowed parameter tolerances for this product category.

Parameter Comparison

Engineering Selection Recommendations

The 1.5SMC15A from Good-Ark Semiconductor is a direct substitute for the SM15T15A-M3/9AT. Both components are active products with full RoHS3 compliance and identical moisture sensitivity ratings. The electrical parameters match exactly across all critical specifications: voltage ratings, clamping characteristics, and power dissipation. Peak pulse current differs by 0.2A (70.8A versus 71A), which is within acceptable tolerance for TVS diode applications. Both devices use identical DO-214AB (SMC) surface mount packaging, ensuring mechanical and thermal compatibility in PCB assembly processes. Selection between these parts may be based on availability, lead time, or supply chain requirements, as both meet the specified electrical and compliance criteria.

Frequently Asked Questions (FAQ)

Q: Can the 1.5SMC15A replace the SM15T15A-M3/9AT in existing designs?

A: Yes. The 1.5SMC15A meets all electrical parameter requirements and uses the same DO-214AB (SMC) package. No circuit modifications or PCB layout changes are required.

Q: What is the significance of the peak pulse current difference (71A vs 70.8A)?

A: The 0.2A difference is within normal manufacturing tolerance for TVS diodes and does not affect functional performance in transient voltage suppression applications.

Q: Are there any temperature range considerations when substituting?

A: The SM15T15A-M3/9AT operates from -65°C to 150°C, while the 1.5SMC15A operates from -55°C to 150°C. For applications requiring operation below -55°C, the original part must be retained.

Q: Do both parts have the same compliance certifications?

A: Yes. Both the SM15T15A-M3/9AT and 1.5SMC15A are RoHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited) moisture sensitivity ratings.

Q: Is PCB footprint compatibility guaranteed?

A: Yes. Both components use the DO-214AB (SMC) surface mount package with identical mechanical dimensions and pin configuration.