Bourns has a comprehensive range of products offering surge protection against Electrostatic Discharge (ESD) and Electrical Fast Transient (EFT) events. Surge protection is extremely important in modern electronic systems particularly those with I/O data ports which are susceptible to user errors such as incorrect cables being plugged in or external ESD/EFT events which can cause complete system failure unless adequate protection is built in to these I/O ports.
Bourns has produced a PortNote® Solution flyer which addresses protection against ESD, EFT, power and surge faults on RS-485 serial ports which are commonly used in industrial electronic systems. The solution uses 2 x TBU® High-Speed Protectors, 2 x Metal Oxide Varistors (MOVs) and 1 x TVS Diode Array and allows compliance with IEC 61000-4-2 ESD Level 4 (8 kV / 15 kV), IEC 61000-4-4 EFT and IEC 61000-4-5 Surge / Lightning.
Example Circuit Design
This circuit solution provides excellent protection for both indoor and outdoor applications, it also protects against 28 VRMS and 120 VRMS power cross condition.
Key Features
The Bourns TBU® devices are low capacitance single bidirectional high-speed protection components, constructed using MOSFET semiconductor technology, and designed to protect against faults caused by short circuits, AC power cross, induction and lightning surges. The TBU® high-speed protector can be placed in the system circuit and will monitor the current with the MOSFET detection circuit triggering to provide an effective barrier behind which sensitive electronics will not be exposed to large voltages or currents during surge events.
Click here to download the TBU-CA065-300-WH
The Bourns MOV-10DxxxK Series of 10 mm radial leaded varistor devices protects against overvoltage transients such as lightning, power contact and power induction. The metal oxide varistors (MOV) offer a choice of varistor voltages and a high current handling, high energy absorption capability and fast response times to protect against transient faults up to rated limits.
Click here to download the MOV-10DxxxK datasheet
The Bourns CDSOT23-SM712 device provides ESD, EFT and Surge protection for data ports meeting IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT) and IEC 61000-4-5 (Surge) requirements. The Transient Voltage Suppressor array features 2 TVS diodes with Working Peak Reverse Voltage of 7 V or 12 V with Minimum Breakdown Voltage of 7.5 V or 13.3 V respectively. The device is offered in the industry standard compact SOT23 package.
Click here to download the CDSOT23-SM712 datasheet
Click here for more information or to buy from Anglia Live.
Click here to download the RS-485 protection PortNote® flyer
Anglia are offering customers FREE samples of the TBU®, MOV and TVS Diode arrays featured in this PortNote® from Bourns, please fill in the form below to register for your FREE samples now.
FREE samples for UK and Ireland customers only, subject to availability.
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Anglia Components has been awarded Regional Distributor of the Year in North Europe 2022 by Bourns, a leading manufacturer and supplier of electronic components.
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Bourns boast more than 50 years of Magnetic components experience, they offer a broad, proven and continually expanding portfolio of standard and semi-custom products as well as extensive capabilities for the development of fully customized components.
Anglia has been named 2020 Highest Performing Distributor - Regional Partner, Northern Europe by Bourns following an exceptional performance across a wide range of product lines including, Trimpot, Magnetics and Multifuse.