SM4T39AY Automotive TVS diode with 33V reverse standoff, 69.7V clamping, 400W peak pulse power, unidirectional, surface mount SMA package.
Mfr Part #:

SM4T39AY

Available from 1 distributors
Mfr Name: STMicroelectronics
STMicroelectronics
Automotive TVS diode with 33V reverse standoff, 69.7V clamping, 400W peak pulse power, unidirectional, surface mount SMA package.
✓ Total Stock: 20,000 pcs
$ Price Range: $0.33 - $1.46

SM4T39AY Available from 1 distributor

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

SM4T39AY 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

SM4T39AY Description

Short technical summary and product information.

The SM4T39AY is an automotive-grade unidirectional TVS diode from STMicroelectronics designed to protect sensitive electronics from voltage transients. It features a reverse standoff voltage of 33V and a maximum clamping voltage of 69.7V at 33A peak pulse current (8/20µs waveform). With a peak pulse power rating of 400W, this device is suitable for suppressing surges in automotive power lines and signal lines.

 

This TVS diode is housed in a DO-214AC (SMA) surface mount package and operates over a junction temperature range of -55°C to 150°C. It is not intended for power line protection and is optimized for unidirectional transient suppression. The SM4T39AY is RoHS3 compliant and has an MSL of 1 (unlimited).

SM4T39AY Quick Information

Product Type: TVS Diode
Series: SM4T
Canonical Name: STMicroelectronics SM4T39AY Automotive TVS Diode
Subcategory: Automotive TVS

SM4T39AY Compliance

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

SM4T39AY Estimated Pricing

Qty Low High
1+ $1.46 $1.46
10+ $0.92 $0.92
100+ $0.61 $0.61
500+ $0.48 $0.48
1,000+ $0.43 $0.43
2,500+ $0.37 $0.37
5,000+ $0.35 $0.35
10,000+ $0.35 $0.35
25,000+ $0.33 $0.33

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

SM4T39AY Features

  • Automotive-grade unidirectional TVS diode.
  • 33V reverse standoff voltage rating.
  • 69.7V maximum clamping voltage.
  • 400W peak pulse power capability.
  • Surface mount SMA (DO-214AC) package.

SM4T39AY Applications

  • Used in automotive electronic control units.
  • Protects power lines from voltage transients.
  • Suitable for signal line surge suppression.
  • Ideal for 24V automotive systems.

SM4T39AY FAQs

7 frequently asked questions generated from this part’s specifications.
What is the reverse standoff voltage of the SM4T39AY?

33V.

What is the maximum clamping voltage?

69.7V at 33A peak pulse current (8/20µs).

What is the peak pulse power rating?

400W.

What package is the SM4T39AY available in?

DO-214AC (SMA) surface mount package.

Is the SM4T39AY RoHS compliant?

RoHS3 compliant (unverified).

What is the operating temperature range?

-55°C to 150°C (junction).

How many unidirectional channels does it have?

1 unidirectional channel.

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