SM4T18CAY The SM4T18CAY is a 400W bidirectional TVS diode from STMicroelectronics. It features a maximum clamping voltage of 32.5V and peak pulse current of 71A (8/20µs).
Mfr Part #:

SM4T18CAY

Available from 1 distributors
Mfr Name: STMicroelectronics
STMicroelectronics
The SM4T18CAY is a 400W bidirectional TVS diode from STMicroelectronics. It features a maximum clamping voltage of 32.5V and peak pulse current of 71A (8/20µs).
Total Stock: 20,000 pcs
$ Price Range: $0.35 - $1.53

SM4T18CAY Available from 1 distributor

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Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
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20,000 pcs
20000 pcs On Request 1 On Request On Request On Request On Request On Request

SM4T18CAY Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
AEC Qualified
Applications
Automotive Grade
Bidirectional Channels
Current
Industrial Grade
Medical Grade
Military Grade
Mounting Type
Operating Temperature
Power
Power Line Protection
SVHC Present
Supplier Device Package
Tape & Reel
Type
Voltage

SM4T18CAY Description

Short technical summary and product information.

The SM4T18CAY is a bidirectional Zener TVS diode designed for automotive applications. It provides transient voltage suppression with a maximum clamping voltage of 32.5V and a peak pulse power rating of 400W. The device can handle a peak pulse current of 71A under an 8/20µs waveform.

 

This TVS diode is surface-mountable in a DO-214AC (SMA) package, making it suitable for automated assembly. It operates over a junction temperature range of -55°C to 150°C. The bidirectional configuration allows protection for both positive and negative transients.

 

Designed for automotive use, the SM4T18CAY meets the reliability requirements of the automotive industry. It is RoHS3 compliant and has an MSL of Level 1 (unlimited). The part is manufactured by STMicroelectronics, a leading semiconductor supplier.

SM4T18CAY Quick Information

Product Type: TVS Diode
Canonical Name: SM4T18CAY TVS Diode, Bidirectional, 400W, SMA Package
Subcategory: Bidirectional TVS Diode

SM4T18CAY Compliance

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

SM4T18CAY Estimated Pricing

Qty Low High
1+ $1.53 $1.53
10+ $0.96 $0.96
100+ $0.64 $0.64
500+ $0.50 $0.50
1,000+ $0.44 $0.44
2,500+ $0.38 $0.38
5,000+ $0.35 $0.35

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

SM4T18CAY Features

  • 400W peak pulse power rating.
  • Bidirectional Zener TVS diode.
  • Maximum clamping voltage of 32.5V.
  • Peak pulse current of 71A (8/20µs).
  • Surface mount SMA (DO-214AC) package.

SM4T18CAY Applications

  • Ideal for automotive electronic systems.
  • Protects sensitive automotive circuits.
  • Used in automotive sensor modules.
  • Protects automotive control units from transients.

SM4T18CAY FAQs

7 frequently asked questions generated from this part’s specifications.
What is the clamping voltage of the SM4T18CAY?

32.5V maximum.

What is the peak pulse current rating?

71A under 8/20µs waveform.

What is the peak pulse power rating?

400W.

Is the SM4T18CAY unidirectional or bidirectional?

Bidirectional.

What package does the SM4T18CAY come in?

DO-214AC (SMA) surface mount package.

What is the operating temperature range?

-55°C to 150°C (junction temperature).

Is this TVS diode suitable for automotive applications?

Yes, it is designed for automotive applications.

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