SM30T28AY The SM30T28AY is an automotive-grade unidirectional TVS diode from STMicroelectronics with 24V reverse standoff voltage, 38.9V clamping voltage, and 3kW peak pulse power capability in a surface-mount SMC package.
Mfr Part #:

SM30T28AY

Available from 3 distributors
Mfr Name: STMicroelectronics
STMicroelectronics
The SM30T28AY is an automotive-grade unidirectional TVS diode from STMicroelectronics with 24V reverse standoff voltage, 38.9V clamping voltage, and 3kW peak pulse power capability in a surface-mount SMC package.
Total Stock: 16,000 pcs
$ Price Range: $0.53 - $1.91

SM30T28AY Available from 3 distributors

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10,000 pcs
10000 pcs On Request 1 On Request On Request On Request On Request 2026-02-16 21:33:16
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5,000 pcs
5000 pcs On Request 1 On Request On Request On Request On Request On Request
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1,000 pcs
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SM30T28AY Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Applications
Current
Mounting Type
Operating Temperature
Power
Power Line Protection
Supplier Device Package
Tape & Reel
Type
Unidirectional Channels
Voltage
Voltage - Breakdown (Min)
Voltage - Reverse Standoff (Typ)

SM30T28AY Description

Short technical summary and product information.

The SM30T28AY is a unidirectional transient voltage suppression (TVS) diode designed for automotive applications. It features a reverse standoff voltage of 24V and a minimum breakdown voltage of 26.7V. The device can clamp transient voltages up to 38.9V at a peak pulse current of 77.1A (10/1000µs waveform), with a peak pulse power rating of 3000W (3kW). It is not intended for power line protection. The SM30T28AY is housed in a DO-214AB (SMC) surface-mount package and operates over a junction temperature range of -55°C to 175°C. This component is suitable for protecting sensitive electronics in automotive environments from voltage transients.

SM30T28AY Quick Information

Product Type: TVS Diode
Canonical Name: SM30T28AY - Automotive TVS Diode, 24V Reverse Standoff, 3kW Peak Pulse Power, SMC Package
Subcategory: Unidirectional TVS Diode

SM30T28AY Compliance

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

SM30T28AY Estimated Pricing

Qty Low High
1+ $1.91 $1.91
10+ $1.25 $1.25
100+ $0.86 $0.86
500+ $0.73 $0.73
1,000+ $0.67 $0.67
2,500+ $0.61 $0.61
5,000+ $0.54 $0.54
10,000+ $0.53 $0.53

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

SM30T28AY Features

  • Automotive-grade unidirectional TVS diode.
  • 24V reverse standoff voltage rating.
  • 3kW peak pulse power capability.
  • Surface-mount SMC package.
  • Wide operating temperature range -55°C to 175°C.

SM30T28AY Applications

  • Protects automotive electronics from voltage transients.
  • Used in engine control unit power lines.
  • Suitable for sensor and actuator protection.
  • Ideal for 24V automotive systems.

SM30T28AY FAQs

7 frequently asked questions generated from this part’s specifications.
What is the reverse standoff voltage of the SM30T28AY?

24V typical.

What is the breakdown voltage of the SM30T28AY?

Minimum 26.7V.

What is the clamping voltage of the SM30T28AY?

Maximum 38.9V at 77.1A peak pulse current.

What is the peak pulse current rating of the SM30T28AY?

77.1A (10/1000µs waveform).

What package does the SM30T28AY come in?

DO-214AB (SMC) surface-mount package.

What is the peak pulse power rating of the SM30T28AY?

3000W (3kW) for 10/1000µs waveform.

What is the operating temperature range of the SM30T28AY?

-55°C to 175°C (junction temperature).

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