STMicroelectronics SM30T

SM30T variants from STMicroelectronics

Variants

Mfr

STMicroelectronics

Lifecycle

Active

SM30T Overview

What changes between part numbers, and what to check before you lock the BOM — TVS Diodes.

Key Features

Lifecycle mix: ActiveConfirm lifecycle on the exact MPN, not just the base number prefix.
28 distinct suffix patternsExamples: 10AY, 12AY, 12CAY, 15AY, 15CAY (+23 more). Decode suffix meaning in the ordering notes under the variant table.

Target Applications

TVS Diodes — design-in and field replacement
BOM scrub where only the base prefix is known but suffix is TBD
Second-source checks when the original MPN is constrained

Ordering Variants

Compare 28 SM30T part numbers by package, electrical parameters, lifecycle, and availability. Use RFQ for stock and lead-time confirmation.

Part Number	Description	Manufacturer	Lifecycle	RoHS	Availability	Action
SM30T10AY	Automotive 3000 W TVS in SMC	STMicroelectronics	Active	Compliant	In Stock	RFQ
SM30T12AY	Automotive 3000 W TVS in SMC	STMicroelectronics	Active	Compliant	In Stock	RFQ
SM30T12CAY	Automotive 3000 W TVS in SMC	STMicroelectronics	Active	Compliant	In Stock	RFQ
SM30T15AY	Automotive 3000 W TVS in SMC	STMicroelectronics	Active	Compliant	In Stock	RFQ
SM30T15CAY	Automotive 3000 W TVS in SMC	STMicroelectronics	Active	Compliant	In Stock	RFQ
SM30T18AY	3kW Unidirectional TVS Diode, 15V Working Voltage, DO-214AB	STMicroelectronics	Active	Compliant	In Stock	RFQ
SM30T18CAY	3kW Bidirectional TVS Diode, 18.5V Breakdown, SMC, 15V Working	STMicroelectronics	Active	Compliant	In Stock	RFQ
SM30T19AY	Automotive 3000 W TVS in SMC	STMicroelectronics	Active	Compliant	In Stock	RFQ
SM30T19CAY	Automotive 3000 W TVS in SMC	STMicroelectronics	Active	Compliant	In Stock	RFQ
SM30T21AY	3kW Unidirectional TVS Diode, 26V Working Voltage, DO-214AB	STMicroelectronics	Active	Compliant	In Stock	RFQ
SM30T21CAY	3kW Bidirectional TVS Diode, 18V Working Voltage, DO-214AB	STMicroelectronics	Active	Compliant	In Stock	RFQ
SM30T23AY	3kW Unidirectional TVS Diode, 20V Working Voltage, DO-214AB	STMicroelectronics	Active	Compliant	In Stock	RFQ
SM30T23CAY	3kW Bidirectional TVS Diode, 20V Working, DO-214AB, SM	STMicroelectronics	Active	Compliant	In Stock	RFQ
SM30T26CAY	3kW Bidirectional TVS Diode, 22V Working Voltage, SMC Package	STMicroelectronics	Active	Compliant	In Stock	RFQ
SM30T28AY	3000W Unidirectional TVS Diode, 24V, DO-214AB, 150°C	STMicroelectronics	Active	Compliant	In Stock	RFQ
SM30T30AY	3kW Unidirectional TVS Diode, 26V Working Voltage, SMC	STMicroelectronics	Active	Compliant	In Stock	RFQ
SM30T30CAY	Automotive 3000 W TVS in SMC	STMicroelectronics	Active	Compliant	In Stock	RFQ
SM30T33CAY	3kW Bidirectional TVS Diode, 28V Working, 31.1-34.3V Breakdown, SMC	STMicroelectronics	Active	Compliant	In Stock	RFQ
SM30T35CAY	30V Bidirectional TVS Diode, 3kW, SMC, AEC-Q101	STMicroelectronics	Active	Compliant	In Stock	RFQ
SM30T39AY	3kW TVS Diode, 33V Reverse Standoff, SMC, Unidirectional	STMicroelectronics	Active	Compliant	In Stock	RFQ

Ordering Code Differences

How suffixes on SM30T map to package, grade, and reel options.

How to Choose the Right SM30T TVS Diodes

📦

Match the footprint first

Pull the exact package drawing for your MPN — base-number swaps fail most often at the footprint, not the schematic.

⚡

Electrical headroom

Compare voltage and current columns in the variant table. For SM30T, a suffix with lower voltage or current rating will not survive the same circuit without recalculation.

🌡️

Temp grade letter matters

Commercial (0–70 °C) and industrial (−40–85 °C+) suffixes look similar in the prefix — confirm ambient + self-heating, not just the first page of the datasheet.

🔢

Copy the full MPN

Do not BOM only "SM30T" — include the full suffix (e.g. 10AY, 12AY, 12CAY). RFQ with reel/tube preference and required date code.

Technical Specifications

Core parameters for SM30T product family

Identity

Base Model

SM30T

Manufacturer

STMicroelectronics

Listed Variants

Variant Parameters

Lifecycle Status

Active

RoHS Status

Compliant

Source SM30T with Octatronics

Request stock confirmation, lead time, date code, and pricing for all 28 ordering variants from STMicroelectronics. Our team supports active, EOL, and hard-to-find component sourcing.

Original manufacturer parts with traceability options
BOM upload and multi-line RFQ support
Package, grade, and compliance verification

Request Quote View STMicroelectronics Browse all base models →

Frequently Asked Questions

Common technical questions about the SM30T product family.

Is SM30T a single part I can order, or a family prefix?

SM30T is a base / family code from STMicroelectronics. You order a full MPN such as SM30T10AY, SM30T12AY, SM30T12CAY. The variant table lists 28 orderable lines with different suffixes.

What do the suffix letters on SM30T part numbers mean?

Listed suffix fragments include: 10AY, 12AY, 12CAY, 15AY, 15CAY, 18AY. Typically they encode package (see Package column), temperature grade, and tape/reel option. Always decode on the STMicroelectronics datasheet ordering guide — do not guess from pattern alone.

What is the lifecycle status of SM30T variants?

Lifecycle values in our listing: Active. Status is per MPN suffix — one variant can be Active while another is NRND. Check PCN for your exact suffix before multi-year commitments.

What should I send for an RFQ on SM30T?

Full manufacturer MPN (not just SM30T), quantity, needed date code, reel vs tube, and any compliance docs (CoC, RoHS, conflict minerals). If you only know the base prefix, include a photo of the existing label or reel.