SMBJ18CA ESD Protection Diodes / TVS Diodes by Littelfuse – High-Power Bidirectional Surge Suppression for Electronic Circuit Protection

The ESD Protection Diodes / TVS Diodes SMBJ18CA by Littelfuse are robust, fast-acting transient suppression components designed to safeguard sensitive electronics from harmful voltage spikes, lightning surges, electrostatic discharge, and switching transients. As a key member of the Circuit Protection, ESD Protection Diodes / TVS Diodes family, the SMBJ18CA provides reliable bidirectional protection with exceptional surge handling capability.

Available now at www.xonelec.com for global delivery.

Technical Specifications of SMBJ18CA

• Manufacturer: Littelfuse

• Part Number: SMBJ18CA

• Category: Circuit Protection, ESD Protection Diodes / TVS Diodes

• Polarity: Bidirectional

• Working Voltage (VWM): 18V

• Breakdown Voltage: 20V–22.1V

• Clamping Voltage: ~29.2V

• Peak Pulse Power: 600W

• Package Type: SMB (DO-214AA)

• Response Time: <1 picosecond

This device offers rugged and dependable transient suppression for demanding applications.

Key Features of SMBJ18CA

• 600W peak pulse surge capability

• Bidirectional protection ideal for AC and alternating signal applications

• Ultra-fast response time for maximum suppression efficiency

• Low leakage and low dynamic resistance

• Compact SMB package optimized for SMT designs

• Designed for rugged Circuit Protection environments and ESD Protection Diodes / TVS Diodes applications

These attributes make it one of the most commonly used Littelfuse TVS devices in the industry.

Applications of SMBJ18CA

The SMBJ18CA ESD Protection Diodes / TVS Diodes by Littelfuse are widely used in:

• Industrial control electronics

• Automotive ECUs, sensors, and in-vehicle communication lines

• Telecom interfaces (Ethernet, CAN, RS-485, LIN)

• Consumer electronics & smart appliances

• Switching power supplies & DC power rails

• Microcontroller and IC input protection

It is an essential component for robust Circuit Protection in harsh electrical environments.

Wiring and Connection Overview

• Bidirectional TVS structure

• SMB (DO-214AA) SMT package

• Ideal for automated high-density PCB assemblies

Perfect for use in fast-response ESD Protection Diodes / TVS Diodes designs where space and reliability matter.

Use Case Scenario: Industrial Communication Line Protection

Problem: An industrial RS-485 communication line suffered frequent surge damage during high-load switching.
Solution: Engineers used the SMBJ18CA TVS Diode by Littelfuse on each communication node.
Result: Overvoltage failures were eliminated, improving equipment uptime dramatically.

This shows how the SMBJ18CA strengthens communication reliability in Circuit Protection systems.

Download Datasheet for SMBJ18CA

You can download the complete SMBJ18CA datasheet from XON Electronics for electrical curves and detailed specifications.

Also Available from Other Manufacturers

Equivalent ESD Protection Diodes / TVS Diodes are also available from:

SMC Diode

PROSEMI

Yenji

Taiwan Semiconductor

ON Semiconductor

Bourns

Kyocera AVX

Semtech

etc.

These alternatives provide flexibility for designers looking for drop-in replacements.

Why Buy SMBJ18CA from XON Electronics?

• Trusted global supplier of Circuit Protection components

• Fast delivery across USA, India, Australia, Europe & other countries

• Guaranteed authentic Littelfuse components

• Competitive pricing with support for bulk orders

• Reliable sourcing for critical and hard-to-find electronic parts

Order online now at www.xonelec.com.

FAQs – SMBJ18CA TVS Diodes

Q1: Is SMBJ18CA bidirectional?
Yes, suitable for AC and alternating signal protection.

Q2: What is the peak pulse power rating?
600W.

Q3: Can it protect microcontroller I/O pins?
Yes, ideal for ESD and surge suppression.

Q4: What package does it use?
SMB (DO-214AA).

Q5: Is it suitable for communication interfaces?
Yes, ideal for CAN, RS-485, Ethernet, and similar interfaces.

Conclusion

The SMBJ18CA ESD Protection Diodes / TVS Diodes by Littelfuse offer reliable, high-power surge suppression with fast clamping response and long-term durability. As part of the Circuit Protection, ESD Protection Diodes / TVS Diodes family, it is a top choice for industrial, automotive, telecom, and consumer electronics applications requiring robust transient protection.

Order the SMBJ18CA today from www.xonelec.com.