SMAJ18A ESD Protection Diodes / TVS Diodes by Littelfuse – Fast and Reliable Surge Protection for Modern Electronics

The ESD Protection Diodes / TVS Diodes SMAJ18A by Littelfuse provide highly reliable transient voltage suppression for sensitive circuits exposed to ESD, voltage spikes, and lightning-induced surges. As a trusted device in the Circuit Protection, ESD Protection Diodes / TVS Diodes family, the SMAJ18A delivers fast response, stable clamping, and dependable performance in communication, automotive, industrial, and consumer systems.

Available now at www.xonelec.com with worldwide delivery.

Technical Specifications of SMAJ18A

• Manufacturer: Littelfuse

• Part Number: SMAJ18A

• Category: ESD Protection Diodes / TVS Diodes

• Polarity: Unidirectional

• Stand-Off Voltage: 18V

• Breakdown Voltage: ~20V

• Clamping Voltage: ~29.2V

• Peak Pulse Power: 400W

• Package: SMA (DO-214AC)

• Ultra-fast transient response (<1ps)

Key Features of SMAJ18A

• 400W surge capability for durable bold Circuit Protection

• Unidirectional protection for precise clamping

• Compact SMA package ideal for high-density PCB layouts

• Fast response time for enhanced ESD Protection Diodes / TVS Diodes performance

• Stable operation across a wide temperature range

• Littelfuse reliability ensures long service life

Applications of SMAJ18A

• Industrial automation & equipment

• RS-485, CAN, and communication lines

• Automotive electronics

• Power supply modules

• Consumer devices and IoT systems

• General-purpose Circuit Protection for sensitive IC inputs

Wiring and Connection Overview

• SMA package supports automated reflow soldering

• Correct polarity marking ensures proper placement

• Quick clamping ideal for protecting microcontrollers and communication ports

• Suitable for low- to medium-power ESD Protection Diodes / TVS Diodes applications

• Compact design supports space-limited layouts

Use Case Scenario – Protecting Industrial RS-485 Lines

Problem: RS-485 networks in industrial environments face frequent transient spikes from nearby motors and switching devices.
Solution: The SMAJ18A ESD Protection Diodes / TVS Diodes by Littelfuse provide immediate clamping and safeguard communication ICs.
Result: Improved uptime, reduced equipment failures, and strong bold Circuit Protection performance.

Download Datasheet for SMAJ18A

The complete datasheet with clamping curves and electrical parameters is available at XON Electronics.

Also Available from Other Manufacturers

Other brands offering similar ESD Protection Diodes / TVS Diodes include:

• LGE

• SMC Diode

• Changjing Electronics Technology

• ZHIDE

• TKS

• Leiditech

• Ruilongyuan

• Yenji

• Leshan

• Bourns

• And more…

These manufacturers produce a wide selection of bold Circuit Protection, ESD Protection Diodes / TVS Diodes products.

Why Buy SMAJ18A from XON Electronics?

• 100% original Littelfuse components

• Worldwide shipping to USA, India, Australia, Europe & more

• Competitive pricing for bulk orders

• Large inventory of TVS Diodes and Circuit Protection devices

• Trusted sourcing from x-on electronics

FAQs – SMAJ18A TVS Diode

Q1: What is the power rating of SMAJ18A?
400W peak pulse power.

Q2: Is it unidirectional?
Yes, SMAJ18A is a unidirectional TVS diode.

Q3: What type of circuits benefit from SMAJ18A?
Communication lines, power modules, microcontroller inputs, and industrial electronics.

Q4: What package type does it use?
SMA (DO-214AC).

Q5: Does it support fast response time?
Yes, <1 picosecond.

Conclusion

The SMAJ18A ESD Protection Diodes / TVS Diodes by Littelfuse provide robust surge suppression, precise voltage clamping, and dependable performance across industrial, automotive, telecom, and consumer applications. As part of the bold Circuit Protection, ESD Protection Diodes / TVS Diodes family, SMAJ18A is an excellent choice for safeguarding sensitive circuitry.
Order now from xon electronics.