SMAJ18A-TR The STMicroelectronics SMAJ18A-TR is a 400W unidirectional TVS diode in a DO-214AC (SMA) package, designed for general purpose transient voltage suppression.
Mfr Part #:

SMAJ18A-TR

Available from 3 distributors
Mfr Name: STMicroelectronics
STMicroelectronics
The STMicroelectronics SMAJ18A-TR is a 400W unidirectional TVS diode in a DO-214AC (SMA) package, designed for general purpose transient voltage suppression.
Total Stock: 129,810 pcs
$ Price Range: $0.10 - $0.60

SMAJ18A-TR Available from 3 distributors

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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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85,000 pcs
85000 pcs On Request 1 On Request On Request On Request On Request On Request
Non-Authorised Inventory information
31,020 pcs
31020 pcs On Request 1 On Request On Request On Request On Request On Request
Non-Authorised Inventory information
13,790 pcs
13790 pcs On Request 1 On Request On Request 1719+ On Request On Request

SMAJ18A-TR 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

SMAJ18A-TR Description

Short technical summary and product information.

The SMAJ18A-TR from STMicroelectronics is a unidirectional transient voltage suppression (TVS) diode rated for 400W peak pulse power (8/20µs waveform). It provides a clamping voltage of 39.3V at a peak pulse current of 59A, making it suitable for protecting sensitive electronics from voltage transients. The device features a standoff voltage of 18V and is housed in a surface-mount DO-214AC (SMA) package. It operates over a temperature range of -55°C to 150°C and is designed for general purpose applications. The component offers one unidirectional channel and does not include power line protection.

SMAJ18A-TR Quick Information

Product Type: TVS Diode
Canonical Name: STMicroelectronics SMAJ18A-TR Unidirectional TVS Diode, 400W, DO-214AC (SMA)
Subcategory: Unidirectional TVS Diode

SMAJ18A-TR Compliance

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

SMAJ18A-TR Estimated Pricing

Qty Low High
1+ $0.60 $0.60
10+ $0.37 $0.37
100+ $0.23 $0.23
500+ $0.18 $0.18
1,000+ $0.15 $0.15
2,500+ $0.14 $0.14
5,000+ $0.11 $0.11
10,000+ $0.10 $0.10
25,000+ $0.10 $0.10

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

SMAJ18A-TR Features

  • 400W peak pulse power dissipation.
  • 39.3V clamping voltage at 59A.
  • Unidirectional protection for single lines.
  • Surface mount DO-214AC (SMA) package.
  • Operating temperature range -55°C to 150°C.

SMAJ18A-TR Applications

  • General purpose transient voltage suppression.
  • Ideal for protecting sensitive ICs.
  • Suitable for portable electronics.
  • Use in automotive and industrial systems.

SMAJ18A-TR FAQs

6 frequently asked questions generated from this part’s specifications.
What is the clamping voltage of the SMAJ18A-TR?

The maximum clamping voltage is 39.3V.

What is the peak pulse current rating of this TVS diode?

The maximum peak pulse current is 59A under 8/20µs test condition.

What package does the SMAJ18A-TR come in?

It is available in a DO-214AC (SMA) surface-mount package.

Is the SMAJ18A-TR unidirectional or bidirectional?

It is a unidirectional TVS diode with one channel.

Does this diode provide power line protection?

No, it does not include power line protection.

What is the operating temperature range?

The operating temperature range is -55°C to 150°C (junction).

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