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SM4T50AY The SM4T50AY is a unidirectional TVS diode from STMicroelectronics, designed for automotive applications. It features a 43V reverse standoff voltage and 91V clamping voltage, capable of handling 25A (8/20µs) peak pulse current.
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SM4T50AY

Available from 1 distributors
Mfr Name: STMicroelectronics
STMicroelectronics
The SM4T50AY is a unidirectional TVS diode from STMicroelectronics, designed for automotive applications. It features a 43V reverse standoff voltage and 91V clamping voltage, capable of handling 25A (8/20µs) peak pulse current.
✓ Total Stock: 5,000 pcs
$ Price Range: $0.19 - $0.21

SM4T50AY Available from 1 distributor

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Fe Components ✓
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5,000 pcs
On Request
5000 pcs On Request 1 On Request On Request On Request On Request On Request
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SM4T50AY Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
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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SM4T50AY Description

Short technical summary and product information.

The SM4T50AY is a unidirectional Zener TVS diode manufactured by STMicroelectronics, intended for automotive applications requiring transient voltage suppression. It provides circuit protection against voltage spikes and electrostatic discharge.

 

Key electrical characteristics include a reverse standoff voltage of 43V, a clamping voltage of 91V, a peak pulse current of 25A (8/20µs waveform), and a peak pulse power rating of 400W. The device operates over a junction temperature range of -55°C to 150°C.

 

The SM4T50AY is housed in a DO-214AC (SMA) surface-mount package, making it suitable for automated assembly. It is RoHS3 compliant with an MSL of 1 (unlimited) and REACH unaffected status, although these compliance statements are unverified.

 

Cross-references include DigiKey part numbers 497-11796-2-ND, 497-11796-1-ND, and 497-11796-6-ND. No datasheet is currently linked, and the manufacturer page is inaccessible.

SM4T50AY Quick Information

Product Type: TVS Diode
Canonical Name: TVS Diode, Unidirectional, 43V Reverse Standoff, 91V Clamping, DO-214AC (SMA)
Subcategory: Unidirectional TVS

SM4T50AY Compliance

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

SM4T50AY Estimated Pricing

Qty Low High
5,000+ $0.21 $0.21
10,000+ $0.19 $0.19

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

SM4T50AY Features

  • Unidirectional Zener TVS protection diode.
  • 43V reverse standoff voltage rating.
  • 91V clamping voltage capability.
  • 400W peak pulse power dissipation.
  • Automotive-grade surface mount package.

SM4T50AY Applications

  • Used in automotive electronic modules.
  • Protects sensitive circuits from voltage transients.
  • Ideal for 43V rail protection.
  • Suitable for surface mount assembly.

SM4T50AY FAQs

7 frequently asked questions generated from this part’s specifications.
What is the reverse standoff voltage?

43V.

What is the clamping voltage?

91V.

What is the peak pulse current?

25A at 8/20µs.

What is the peak pulse power?

400W.

What package does it come in?

DO-214AC (SMA).

Is it automotive rated?

Yes, its application is listed as Automotive.

What is the operating temperature range?

-55°C to 150°C junction temperature.

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