SM4T68AY Unidirectional TVS diode with 58V reverse stand-off voltage, 121V clamping, and 400W peak pulse power in a surface-mount SMA package.
Mfr Part #:

SM4T68AY

Available from 1 distributors
Mfr Name: STMicroelectronics
STMicroelectronics
Unidirectional TVS diode with 58V reverse stand-off voltage, 121V clamping, and 400W peak pulse power in a surface-mount SMA package.
Total Stock: 25,000 pcs
$ Price Range: $0.35 - $1.49

SM4T68AY 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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25,000 pcs
25000 pcs On Request 1 On Request On Request On Request On Request On Request

SM4T68AY 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
Reverse Stand-off Voltage
Supplier Device Package
Tape & Reel
Type
Unidirectional Channels
Voltage

SM4T68AY Description

Short technical summary and product information.

The SM4T68AY is a unidirectional Zener TVS diode from STMicroelectronics designed for overvoltage protection in automotive applications. It features a reverse stand-off voltage of 58 V and a clamping voltage of 121 V, providing robust protection against transient voltage spikes.

 

With a peak pulse power rating of 400 W and a peak pulse current of 19 A (8/20 µs), this device is suitable for suppressing high-energy transients. The operating junction temperature range is -55°C to 150°C, ensuring reliable performance in harsh environments.

 

The SM4T68AY is housed in a DO-214AC (SMA) surface-mount package, making it ideal for automated assembly and space-constrained designs. It is RoHS3 compliant and REACH unaffected, with an MSL of Level 1 for unlimited floor life.

SM4T68AY Quick Information

Product Type: TVS Diode
Canonical Name: SM4T68AY TVS Diode, 58V Reverse Stand-off, 121V Clamping, SMA
Subcategory: Unidirectional TVS

SM4T68AY Compliance

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

SM4T68AY Estimated Pricing

Qty Low High
1+ $1.49 $1.49
10+ $0.94 $0.94
100+ $0.62 $0.62
500+ $0.49 $0.49
1,000+ $0.43 $0.43
2,500+ $0.40 $0.40
5,000+ $0.35 $0.35

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

SM4T68AY Features

  • 58V reverse stand-off voltage rating.
  • 121V clamping voltage at 19A.
  • 400W peak pulse power capability.
  • Unidirectional Zener TVS protection.
  • Surface-mount DO-214AC SMA package.

SM4T68AY Applications

  • Automotive transient voltage suppression applications.
  • Protects sensitive electronics from voltage spikes.
  • Suitable for surface-mount PCB assembly.
  • Ideal for 58V nominal voltage rails.

SM4T68AY FAQs

7 frequently asked questions generated from this part’s specifications.
What is the reverse stand-off voltage of the SM4T68AY?

58 V.

What is the clamping voltage?

121 V.

What is the peak pulse current rating?

19 A (8/20 µs).

What package is the SM4T68AY available in?

DO-214AC (SMA) surface-mount package.

What is the operating temperature range?

-55°C to 150°C (junction).

Is the SM4T68AY unidirectional?

Yes, it has 1 unidirectional channel.

What is the peak pulse power rating?

400 W.

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