SMAJ12A ESD Protection Diodes / TVS Diodes by Littelfuse
Introduction
The SMAJ12A by Littelfuse is a high-performance unidirectional ESD Protection Diode / TVS Diode designed to protect sensitive circuits from voltage spikes, electrostatic discharge, and transient surges. Widely used in modern electronics, this device offers exceptional reliability in Circuit Protection applications across industrial, automotive, telecom, and consumer sectors.
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Technical Specifications
Electrical Parameters
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Manufacturer: Littelfuse
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Part Number: SMAJ12A
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Device Type: ESD Protection Diodes / TVS Diodes
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Reverse Stand-Off Voltage (VR): 12V
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Breakdown Voltage (VBR): 13.3V – 14.7V
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Clamping Voltage: 19.9V
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Peak Pulse Current: 12.5A
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Peak Pulse Power: 400W
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Package: DO-214AC (SMA)
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Category: Circuit Protection, Surge Suppression, TVS Diodes
The SMAJ12A ensures consistent and durable protection against harmful transient events.
Key Features
Why the SMAJ12A Stands Out
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Fast clamping for superior surge suppression
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Compact SMA surface-mount package
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Excellent ESD immunity for high-reliability designs
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Stable performance across wide temperature ranges
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Ideal for Circuit Protection in telecom and industrial systems
Its reliability makes it one of the most trusted ESD Protection Diodes / TVS Diodes in the Littelfuse range.
Applications
Where SMAJ12A Is Used
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Industrial controllers and PLC systems
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Automotive modules and sensor electronics
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Telecom and data communication interfaces
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Consumer electronics and smart devices
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DC power rails and low-voltage circuits
The SMAJ12A ensures long-term Circuit Protection, even under harsh transient conditions.
Wiring and Connection Overview
Typical Installation
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Place the SMAJ12A across the protected line (signal or DC rail)
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Ensure correct polarity for unidirectional protection
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Ideal for high-speed and low-voltage PCB layouts
This configuration helps ensure fast and reliable ESD suppression.
Use Case Scenario
Practical Example
A communication hardware manufacturer required reliable surge protection for their outdoor network interface modules. Their previous devices failed frequently due to repetitive ESD strikes. Upgrading to the SMAJ12A by Littelfuse provided higher robustness and faster clamping, ensuring stable ESD Protection Diode / TVS Diode operation and reducing service downtime.
Download Datasheet
You can download the full Littelfuse SMAJ12A datasheet from
www.xonelec.com for electrical curves, derating graphs, and mechanical drawings.
Also Available from Other Manufacturers
Equivalent ESD Protection Diodes / TVS Diodes and Circuit Protection parts are also available from:
Why Buy from XON Electronics?
Your Trusted Global Distributor
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Wide range of original Littelfuse components
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Fast global delivery to USA, India, Australia, Europe & more
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Bulk pricing for OEMs and manufacturers
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Secure online ordering
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Technical support for part selection and sourcing
Buy the SMAJ12A or explore thousands of Circuit Protection devices at
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FAQs – SMAJ12A Littelfuse TVS Diode
Q1. What type of protection does the SMAJ12A offer?
It provides surge suppression and ESD protection for sensitive electronic circuits.
Q2. Is SMAJ12A unidirectional or bidirectional?
The SMAJ12A is a unidirectional TVS diode.
Q3. What is its power rating?
It supports up to 400W peak pulse power.
Q4. What category does it belong to?
It falls under Circuit Protection and ESD Protection Diodes / TVS Diodes.
Q5. Where can I buy it?
You can buy it globally from www.xonelec.com.
Conclusion
The SMAJ12A by Littelfuse is a robust and efficient ESD Protection Diode / TVS Diode, offering fast clamping capabilities and strong protection for low-voltage circuits. Its compact design and high surge performance make it a preferred choice in demanding Circuit Protection applications across telecom, industrial, and automotive segments. Now available at www.xonelec.com with worldwide delivery to USA, India, Australia, Europe, and other regions.