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SM30T21AY SM30T21AY is an automotive TVS diode from STMicroelectronics with 3000W peak pulse power and 29.2V clamping voltage. It comes in a surface mount SMC package.
Mfr Part #:

SM30T21AY

Available from 2 distributors
Mfr Name: STMicroelectronics
STMicroelectronics
SM30T21AY is an automotive TVS diode from STMicroelectronics with 3000W peak pulse power and 29.2V clamping voltage. It comes in a surface mount SMC package.
✓ Total Stock: 2,512 pcs
$ Price Range: $0.43 - $1.20

SM30T21AY Available from 2 distributors

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Fe Components ✓
Non-Authorised Inventory information
2,500 pcs
On Request
2500 pcs On Request 1 On Request On Request On Request On Request On Request
PROSOFT ELECTRONICS ✓
Non-Authorised Inventory information
12 pcs
On Request
12 pcs On Request 1 On Request On Request On Request On Request On Request
DistyParts aggregates offers from multiple distributors. Final prices, lead times and terms are subject to the distributors' discretion and may change without prior notice. DistyParts is not liable for any discrepancies.

SM30T21AY Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
AEC Qualified
Applications
Automotive Grade
Current
Mounting Type
Operating Temperature
Power
Power Line Protection
Supplier Device Package
Tape & Reel
Type
Unidirectional Channels
Voltage
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SM30T21AY Description

Short technical summary and product information.

The SM30T21AY is a unidirectional Zener TVS diode designed for automotive applications. It offers a peak pulse power dissipation of 3000W (3kW) and a clamping voltage of 29.2V, with a peak pulse current rating of 102.7A. The device is housed in a DO-214AB (SMC) surface mount package and operates over a junction temperature range of -55°C to 175°C.

 

This TVS diode is intended for transient voltage suppression in automotive electronic systems. Its high power handling and robust package make it suitable for protecting sensitive circuits from voltage spikes. The component is RoHS3 compliant and has an MSL of 1 (unlimited).

 

Key specifications include a single unidirectional channel, no power line protection feature, and a surface mount mounting type. The supplier device package is SMC.

SM30T21AY Quick Information

Product Type: TVS Diode
Series: SM30T21AY
Canonical Name: SM30T21AY Automotive TVS Diode, 3000W, 29.2V Clamping, SMC
Subcategory: Automotive TVS

SM30T21AY Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

SM30T21AY Estimated Pricing

Qty Low High
1+ $1.20 $1.20
10+ $1.07 $1.07
100+ $0.77 $0.77
500+ $0.62 $0.62
1,000+ $0.55 $0.55
2,500+ $0.50 $0.50
5,000+ $0.46 $0.46
10,000+ $0.43 $0.43

Estimated market price range - modelled values for guidance only, not live distributor offers.

SM30T21AY Features

  • Automotive Zener TVS diode for transient suppression.
  • 3000W peak pulse power dissipation capability.
  • 29.2V clamping voltage with 102.7A peak current.
  • Surface mount SMC package for automated assembly.
  • Wide operating temperature range -55°C to 175°C.

SM30T21AY Applications

  • Transient voltage suppression in automotive electronics.
  • Protection for engine control modules and sensors.
  • Surge protection in power distribution systems.
  • Overvoltage clamping in automotive infotainment systems.

SM30T21AY FAQs

6 frequently asked questions generated from this part’s specifications.
What is the clamping voltage of the SM30T21AY?

The clamping voltage is 29.2V.

What is the peak pulse power rating of the SM30T21AY?

The peak pulse power is 3000W (3kW).

What package does the SM30T21AY come in?

It comes in a DO-214AB (SMC) surface mount package.

What is the peak pulse current rating of the SM30T21AY?

The peak pulse current is 102.7A.

Is the SM30T21AY suitable for automotive applications?

Yes, it is specifically designed for automotive applications.

What is the operating temperature range of the SM30T21AY?

It operates from -55°C to 175°C (junction temperature).

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