SM15T24A-M3/9AT Equivalent & Substitute Parts

Part Overview

The SM15T24A-M3/9AT is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the DO-214AB (SMCJ) package and is designed for general-purpose transient voltage suppression applications. 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 supply chain continuity for this critical protection component.

Substiute Parts

SM15T24A-M3/9AT

Vishay General Semiconductor - Diodes DivisionIn Stock: 963SM15T24A-M3/9AT Datasheet

Current PartRFQ

1.5SMC24A

Taiwan Semiconductor CorporationIn Stock: 124621.5SMC24A Datasheet

MFR RecommendedRFQ

TPSMC24A

Littelfuse Inc.In Stock: 1960TPSMC24A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SM15T24A-M3/9AT is determined by strict electrical and mechanical parameter matching within the TVS diode category. The following parameters define acceptable substitutes:

• Voltage - Reverse Standoff (Typ): 20.5V
• Voltage - Breakdown (Min): 22.8V
• Voltage - Clamping (Max) @ Ipp: 33.2V
• Power - Peak Pulse: 1500W (1.5kW)
• Package / Case: DO-214AB, SMC
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant

The identified substitute parts maintain these critical electrical specifications and package compatibility, ensuring functional equivalence in circuit protection applications. Current - Peak Pulse values may vary within acceptable design margins (45A to 47A range) while maintaining the same power dissipation rating.

Parameter Comparison

Engineering Selection Recommendations

All three parts maintain active production status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Selection between the SM15T24A-M3/9AT and its substitutes should be based on the following factors:

The SM15T24A-M3/9AT offers the widest operating temperature range (-65°C to 150°C), making it suitable for applications requiring extended low-temperature performance.

The 1.5SMC24A from Taiwan Semiconductor Corporation provides higher peak pulse current capability (47A) while maintaining identical voltage specifications and power rating, with availability of 12,400 pieces in stock.

The TPSMC24A from Littelfuse Inc. includes AEC-Q101 automotive qualification and is suitable for automotive-grade applications requiring formal qualification documentation. Peak pulse current is 45.8A with standard industrial temperature range (-55°C to 150°C).

All three parts are electrically interchangeable for general-purpose transient voltage suppression in the 20.5V standoff voltage class with 1500W peak pulse power rating.

Frequently Asked Questions (FAQ)

Q: Can the 1.5SMC24A replace the SM15T24A-M3/9AT in all applications?

A: The 1.5SMC24A is electrically equivalent for transient voltage suppression function. The primary difference is the operating temperature minimum of -55°C versus -65°C for the SM15T24A-M3/9AT. Applications operating below -55°C require the Vishay part.

Q: What is the significance of the different peak pulse current ratings (45A, 47A, 45.8A)?

A: All three parts maintain the same 1500W peak pulse power rating and identical voltage specifications. The current variations reflect different manufacturer design approaches within the same power class and are functionally equivalent for circuit protection purposes.

Q: Is the TPSMC24A suitable for automotive applications?

A: The TPSMC24A carries AEC-Q101 automotive qualification, making it appropriate for automotive-grade designs. The SM15T24A-M3/9AT and 1.5SMC24A do not carry automotive qualification and should not be used in automotive applications requiring formal qualification documentation.

Q: Are all three parts available in the same package?

A: Yes. All three parts use the DO-214AB (SMC) surface mount package with identical mechanical and electrical interface characteristics, enabling direct PCB footprint compatibility.

Q: What compliance certifications apply to all substitute parts?

A: All three parts are RoHS3 compliant, REACH unaffected, and carry ECCN EAR99 classification. All maintain unlimited moisture sensitivity rating (MSL 1).