SMAJ400A The SMAJ400A is a 400W unidirectional TVS diode from Littelfuse Inc. It features a 648V maximum clamping voltage and is designed for surface mount in a DO-214AC (SMA) package.
Mfr Part #:

SMAJ400A

Available from 1 distributors
Mfr Name: Littelfuse Inc.
Littelfuse Inc.
The SMAJ400A is a 400W unidirectional TVS diode from Littelfuse Inc. It features a 648V maximum clamping voltage and is designed for surface mount in a DO-214AC (SMA) package.
Total Stock: 41 pcs

SMAJ400A Available from 1 distributor

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SMAJ400A Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Applications
Current
Halogen Free
Mounting Type
Operating Temperature
Power
Power Line Protection
Supplier Device Package
Tape & Reel
Type
Unidirectional Channels
Voltage

SMAJ400A Description

Short technical summary and product information.

The SMAJ400A is a unidirectional TVS (Transient Voltage Suppression) diode from Littelfuse Inc. It is designed to protect sensitive electronic circuits from voltage transients induced by lightning and other transient voltage events. With a peak pulse power rating of 400W (10/1000μs waveform) and a maximum clamping voltage of 648V, it provides robust protection for general purpose applications.

 

This TVS diode features a Zener construction and is housed in a compact DO-214AC (SMA) surface mount package, suitable for automated assembly and space-constrained PCB layouts. It operates over a wide temperature range of -65°C to 150°C, ensuring reliability in harsh environments. The device is unidirectional, with a single channel for protection.

 

The SMAJ400A is lead-free and halogen-free, and it is rated for 1 (Unlimited) moisture sensitivity level (MSL). It is ideal for use in I/O interfaces, VCC bus, and other vulnerable circuits in telecom, computer, industrial, and consumer electronics applications.

SMAJ400A Quick Information

Product Type: TVS Diode
Series: SMAJ
Canonical Name: SMAJ400A TVS Diode (Unidirectional, 400W, 648V Clamping, DO-214AC)
Subcategory: Unidirectional TVS Diode

SMAJ400A Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)
REACH Status: Non-Compliant
Lead Free: Lead-free

SMAJ400A Features

  • 400W peak pulse power capability.
  • 648V maximum clamping voltage.
  • Unidirectional single channel protection.
  • Surface mount DO-214AC package.
  • Wide operating temperature range.

SMAJ400A Applications

  • Protects I/O interfaces from voltage transients.
  • Suitable for VCC bus protection in electronics.
  • Used in telecom and industrial equipment.
  • Ideal for consumer electronics circuit protection.

SMAJ400A FAQs

6 frequently asked questions generated from this part’s specifications.
What is the clamping voltage of the SMAJ400A?

The maximum clamping voltage is 648V under a 10/1000μs waveform.

What is the peak pulse current rating?

The peak pulse current is 600mA under a 10/1000μs waveform.

What package does the SMAJ400A come in?

The SMAJ400A is available in a DO-214AC (SMA) surface mount package.

What is the operating temperature range?

-65°C to 150°C (junction temperature).

What is the peak pulse power rating?

400W at 10/1000μs waveform.

Is the SMAJ400A unidirectional?

Yes, it has 1 unidirectional channel.

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