Skip to main contentAccessibility help
Accessibility feedback
Press / to jump to the search box
Choose what you’re giving feedback on
  • Delete
  • See more
  • Delete
    • See more
    • Report inappropriate predictions
    Quick Settings
    Sign in
    AI Mode
    All
    Shopping
    Images
    Videos
    Short videos
    Forums
    More
    News
    Web
    Books
    Maps
    Tools

    Search Results

    Any time
    Any time
    Past hour
    Past 24 hours
    Past week
    Past month
    Past year
    Custom range...
    Custom date range
    Go
    All results
    All results
    Verbatim
    Advanced Search
    About 1,530,000 results (0.29s) 
    Ctrl+Shift+X to select

    Refine results

    • Stores
      • DigiKey
      • eBay
      • Zoro
      • L-com Global Connectivity
      See more
    • Category
      • Cable Adapters
      • Surge Protectors
      • Transducers
    • Price
      • Under $20
      • $20 - $60
      • $60 - $150
      • Over $150
      • $
        Please provide a valid price.
        $
        Please provide a valid price.
    • Sort by
      • Price: low to high
      • Price: high to low
    • Color
      • Green
      • Black
      • Blue
      • Navy Blue
      See more
    • Free shipping
      • Free shipping
    • Brand
      • Moxa
      • Eaton
      • Advantech
      • Ditek
      See more
    Failed to load more results. Please try again later.
    Male
    Female
    Nearby
    DigiKey
    On sale
    Get it today
    Cable Adapters
    Surge Protectors
    For Sale
    Transducers
    Buy
    Under $20
    Green
    eBay
    Black
    Blue
    Navy Blue
    Teal
    Zoro
    L-com Global Connectivity
    New
    Used
    Small business
    Free shipping
    Newegg.com
    RS - America
    An AI Overview is not available for this searchCan't generate an AI overview right now. Try again later.
    AI Overview
    RS232 Serial Port Photoelectric Isolation Protector ...
    Passive RS232 protectors safeguard sensitive serial communication equipment from voltage spikes, surges, and lightning without needing external power. These devices typically use Gas Discharge Tubes (GDT) and Transient Voltage Suppressors (TVS) to clamp high voltages and protect RS232 data lines (Tx, Rx, GND), often featuring DIN-rail mounting or inline DB9 connectors. 
    Key Types and Examples: 
    • Inline Surge Protectors: The APC ProtectNet PS9-DCE ($24-$30) protects 9-pin RS232 DCE devices from surge-induced damage using, says Provantage. 
    • Industrial Surge Protectors: Advantech BB-232HESP ($164) is a heavy-duty terminal block surge protector designed for industrial environments, according to RS - America. 
    • Photoelectric Isolators: These provide total electrical isolation between two ends, eliminating ground loops and protecting against up to 7,500V. Examples include the Taidacent RS232 Passive Isolator. 
    • Outdoor Lightning Arrestors: PolyPhaser offers weatherized, 4-pair RS232 surge protectors for outdoor applications, notes PolyPhaser. 
    Key Features to Consider: 
    • Protection Stage: Look for multi-stage protection (e.g., GDT, resistors, and TVS).
    • Response Time: Most offer fast response times (
      <10
      ns
      ).
    • Installation: In-line DB9/DB25 or DIN-rail mounts are common. 
    These devices are crucial for environments with high electric noise, such as industrial automation, server rooms, and telecommunications, explains this YouTube video. 
    • RS232 / RS485 / RS422 / Ethernet Surge Protectors – CommFront
      CommFront offers a variety of RS232 surge protectors. These protectors are designed for direct DIN-rail mounting and provide three...
      CommFront
    • Taidacent RS232 to RS232 Converter Passive Photoelectric Isolator ...
      * RS-232 serial port photoelectric isolation is also called serial isolator (ISOLATORS). It adopts advanced photoelectric isolatio...
      Amazon.com
    • 4 Pair RS-232 Lightning Surge Arrestor Suppressor Series
      RS-232 lightning surge suppressor series will protect your sensitive equipment from electromagnetic pulse (EMP) or other power sur...
      PolyPhaser
    • Surge Protectors - Protect your RS232 RS485 RS422 Serial ...
      Mar 29, 2018 — industrial communication systems such as RS485. and RS422 often require data transmission. between multiple devices over long dist...
      1m
      YouTube·CommfrontComm
    • Outdoor RS-232 Lightning Surge Protector - AL-D8W-12
      The Hyperlink AL-D8W-12 high performance lightning protector provides superior protection of RS-232, Sensors and External 12-volt ...
      L-com
    • Go to product viewer dialog for this item.
      APC PS9-DCE ProtectNet RS-232 Surge Suppressor
      The majority of all surge-induced damage is caused by surges and spikes traveling along unprotected data lines. These surges origi...
      Google
    • Go to product viewer dialog for this item.
      Advantech BB-232HESP | SIGNAL CONDITONER, SERIAL SURGE PROTECTOR, RS-232 TERMINAL BLOCK, BB SERIES | Signal Conditioning & Signal Converters
      SIGNAL CONDITONER, SERIAL SURGE PROTECTOR, RS-232 TERMINAL BLOCK, BB SERIES
      Google
    • Go to product viewer dialog for this item.
      Industrial 10/100 Ethernet Surge Suppressor
      The ISO-ETH-P is an industrial-grade (wide temperature range) bi-directional passive Ethernet surge suppressor. It can protect any...
      Google
    • RS232 / RS485 / RS422 / Ethernet Surge Protectors – CommFront
      CommFront offers a variety of RS232 surge protectors. These protectors are designed for direct DIN-rail mounting and provide three...
      CommFront
    • Taidacent RS232 to RS232 Converter Passive Photoelectric Isolator ...
      * RS-232 serial port photoelectric isolation is also called serial isolator (ISOLATORS). It adopts advanced photoelectric isolatio...
      Amazon.com
    • 4 Pair RS-232 Lightning Surge Arrestor Suppressor Series
      RS-232 lightning surge suppressor series will protect your sensitive equipment from electromagnetic pulse (EMP) or other power sur...
      PolyPhaser
    Show all
    AI can make mistakes, so double-check responses
    Share
    Facebook
    WhatsApp
    X
    Email
    Click to copy link
    Share link
    Link copied
    Thank you
    Your feedback helps Google improve. See our Privacy Policy.
    Share more feedback
    Report a problem
    Close
    Thank you
    Your feedback helps Google improve. See our Privacy Policy.
    Share more feedback
    Report a problem
    Close
    Thank you
    Your feedback helps Google improve. See our Privacy Policy.
    Share more feedback
    Report a problem
    Close
    Show more
    My Ad Center

    Web results

    Industrial 4-Wire RS422 / RS485 / RS232 Surge Protector ...


    CommFront
    https://www.commfront.com › products › industrial-4-wi...
    CommFront
    https://www.commfront.com › products › industrial-4-wi...
    The SPD-422-1 is a passive, rugged, industrial-grade, 4-wire RS422 / RS485 / RS232 surge protector that can be used to limit the voltage surges and spikes ...
    Passive RS232 protector from www.commfront.com
    $59.95 · In stock · Free delivery · 30-day returns

    COMMFRONT Industrial 4-Wire RS422 / RS485 / RS232 ...


    Amazon.com
    https://www.amazon.com › COMMFRONT-Industrial-P...
    Amazon.com
    https://www.amazon.com › COMMFRONT-Industrial-P...
    This industrial 4-wire RS422 / RS485 / RS232 surge protector features passive circuitry designs and thus requires no external power; it supports data rates up ...
    Passive RS232 protector from www.amazon.com

    Industrial RS232 Isolator - Serial RS485 Suppressor


    serialcomm.com
    https://www.serialcomm.com › serial_rs232_converters
    serialcomm.com
    https://www.serialcomm.com › serial_rs232_converters
    A high quality industrial-grade high speed bi-directional 3 wire (TX, RX, GND) opto-isolated port powered RS232 5000V isolator with 15KV ESD and 600W surge ...Read more
    $28 to $81 · Free delivery · 90-day returns

    RS-232 Surge Protector Lightning Arrestor Series


    PolyPhaser
    https://www.polyphaser.com › rs-232-surge-protector-li...
    PolyPhaser
    https://www.polyphaser.com › rs-232-surge-protector-li...
    PolyPhaser RS-232 lightning surge protector / arrestor series will protect your valuable equipment from (EMP) electro-magnetic pulse or other power surge ...Read more
    Passive RS232 protector from www.polyphaser.com

    4-Wire RS422 / RS485 / RS232 Surge Protector (Industrial ...


    data-converters.com
    https://www.data-converters.com › ...
    data-converters.com
    https://www.data-converters.com › ...
    The SPD-422-1 is a passive, rugged, industrial-grade, 4-wire RS422 / RS485 / RS232 surge protector that can be used to limit the voltage surges and spikes ...Read more
    Passive RS232 protector from www.data-converters.com

    Outdoor RS-232 Lightning Surge Protector - AL-D8W-12


    L-com
    https://www.l-com.com › ... › LP Control Lines
    L-com
    https://www.l-com.com › ... › LP Control Lines
    The Hyperlink AL-D8W-12 high performance lightning protector provides superior protection of RS-232, Sensors and External 12-volt data lines from these ...Read more
    Passive RS232 protector from www.l-com.com
    Popular products
    • Com RS232 DB9 Port Silicone Rubber Dust Cover.
      Com RS232 DB9 Port Silicone Rubber Dust Cover
      $0.99
      modCover
      Free delivery
      Com RS232 DB9 Port Silicone Rubber Dust Cover
      $0.99
      modCover
      Free delivery
    • APC PS9-DTE ProtectNet RS232 9 Pin Surge Suppressor.
      APC PS9-DTE ProtectNet RS232 9 Pin Surge Suppressor
      $27.00
      APC by Schneider Electric       & more
      APC PS9-DTE ProtectNet RS232 9 Pin Surge Suppressor
      $27.00
      APC by Schneider Electric       & more
    • Tripp Lite Serial -232 Protector.
      Tripp Lite Serial -232 Protector
      $22.79
      camcor.com
      Tripp Lite Serial -232 Protector
      $22.79
      camcor.com
    • Tripp Lite DB9 Dataline Surge Protector.
      Tripp Lite DB9 Dataline Surge Protector
      $24.81
      DigiKey       & more
      5.0(2)
      Tripp Lite DB9 Dataline Surge Protector
      $24.81
      DigiKey       & more
      5.0(2)
    • APC PS9-DCE ProtectNet RS-232 Surge Suppressor.
      APC PS9-DCE ProtectNet RS-232 Surge Suppressor
      $27.00
      APC by Schneider Electric       & more
      APC PS9-DCE ProtectNet RS-232 Surge Suppressor
      $27.00
      APC by Schneider Electric       & more
    • VGA Port.
      VGA Port
      $0.99
      modCover       & more
      Free delivery
      VGA Port
      $0.99
      modCover       & more
      Free delivery
    • RS232 Optical Isolator DB9 Serial Port Isolation (Protect PC) - (CNC Specialty Store USA).
      RS232 Optical Isolator DB9 Serial Port Isolation (Protect PC) - (CNC Specialty Store USA)
      $28.15
      CNC Specialty Store
      RS232 Optical Isolator DB9 Serial Port Isolation (Protect PC) - (CNC Specialty Store USA)
      $28.15
      CNC Specialty Store
    • RS-232 Voltage Protector - AD-D9SP - TMB.
      RS-232 Voltage Protector - AD-D9SP - TMB
      $18.29
      American Radio Supply
      RS-232 Voltage Protector - AD-D9SP - TMB
      $18.29
      American Radio Supply
    • OONO RS232 DB9MF LED Link Tester.
      OONO RS232 DB9MF LED Link Tester
      $15.00
      czh-labs.com
      Free delivery
      OONO RS232 DB9MF LED Link Tester
      $15.00
      czh-labs.com
      Free delivery
    • LOW PRICE
      APC P232R Surge Protection Module. Low price.
      APC P232R Surge Protection Module
      $18.00Usually $24
      APC by Schneider Electric       & more
      LOW PRICE
      APC P232R Surge Protection Module
      $18.00Usually $24
      APC by Schneider Electric       & more

    Web results

    Wholesale Passive RS232 Photoelectric Isolation Protector ...


    Dtech electronics
    https://www.dtechelectronics.com › passive-rs232-photoe...
    Dtech electronics
    https://www.dtechelectronics.com › passive-rs232-photoe...
    We provide industrial converter and VGA cable. You can browse more information of Passive RS232 photoelectric isolation protector at Guangzhou Dtech ...

    RS232 / RS485 / RS422 / Ethernet Surge Protectors


    CommFront
    https://www.commfront.com › collections › rs232-rs485-...
    CommFront
    https://www.commfront.com › collections › rs232-rs485-...
    Our passive, rugged, industrial-grade RS232 / RS485 / RS422 / Ethernet surge protectors are designed for direct industrial DIN-rail mounting.Read more
    More products
    • RS232 to RS232 Photoelectric Isolator Converter Serial Port Protector Lightning Arrester.
      RS232 to RS232 Photoelectric Isolator Converter Serial Port Protector Lightning Arrester
      $9.45
      eBay       & more
      5.0(4)
      RS232 to RS232 Photoelectric Isolator Converter Serial Port Protector Lightning Arrester
      $9.45
      eBay       & more
      5.0(4)
    • 5% OFF
      Ditek DTK-DB9RS232 Serial Port Surge Protector. 5% OFF.
      Ditek DTK-DB9RS232 Serial Port Surge Protector
      $52.73$56
      JMAC Supply
      5% OFF
      Ditek DTK-DB9RS232 Serial Port Surge Protector
      $52.73$56
      JMAC Supply
    • DB9 Serial RS232 Port Saver, Male to Female.
      DB9 Serial RS232 Port Saver, Male to Female
      $10.25
      KVM Switches Online
      DB9 Serial RS232 Port Saver, Male to Female
      $10.25
      KVM Switches Online
    • DFRobot DFR0734 RS232 CONNECTOR EXPANSION SHIELD.
      DFRobot DFR0734 RS232 CONNECTOR EXPANSION SHIELD
      $19.90
      DigiKey
      DFRobot DFR0734 RS232 CONNECTOR EXPANSION SHIELD
      $19.90
      DigiKey
    • Philmore RS-232 Surge Arrestor.
      Philmore RS-232 Surge Arrestor
      $14.59
      Altex Electronics       & more
      Philmore RS-232 Surge Arrestor
      $14.59
      Altex Electronics       & more
    • L-Com / Infinite Electronics AL-D8W-12 Outdoor RS-232 Lightning Surge Protector.
      L-Com / Infinite Electronics AL-D8W-12 Outdoor RS-232 Lightning Surge Protector
      $137.99
      L-com Global Connectivity       & more
      L-Com / Infinite Electronics AL-D8W-12 Outdoor RS-232 Lightning Surge Protector
      $137.99
      L-com Global Connectivity       & more
    • RS232 Surge Protector Male/Female.
      RS232 Surge Protector Male/Female
      $11.99
      eBay - dockguys
      Free delivery
      RS232 Surge Protector Male/Female
      $11.99
      eBay - dockguys
      Free delivery
    • Moxa ISD-1230-T Surge Protector.
      Moxa ISD-1230-T Surge Protector
      $257.30
      RS - America       & more
      Moxa ISD-1230-T Surge Protector
      $257.30
      RS - America       & more
    • RS232 Optical Isolation Transceiver (Protect your PC or Equipment).
      RS232 Optical Isolation Transceiver (Protect your PC or Equipment)
      $14.95
      PLC Trainer and Cables
      Free delivery by Tue
      RS232 Optical Isolation Transceiver (Protect your PC or Equipment)
      $14.95
      PLC Trainer and Cables
      Free delivery by Tue
    • DB9 F-M Slimline Serial Port Protector.
      DB9 F-M Slimline Serial Port Protector
      $1.95
      PCCables.com Inc,
      Free delivery on $500+
      DB9 F-M Slimline Serial Port Protector
      $1.95
      PCCables.com Inc,
      Free delivery on $500+

    Web results

    RS-232 Crossover, and Protection against shorting two ...


    Electrical Engineering Stack Exchange
    https://electronics.stackexchange.com › questions › rs-2...
    Electrical Engineering Stack Exchange
    https://electronics.stackexchange.com › questions › rs-2...
    Feb 4, 2022 — I'm in the process of designing a USB to RS-232 converter for communication with some existing boards, and I ran into two problems. First Question I need ...
    4 answers  ·  Top answer: The switching cannot happen with passive components. A relay or analog mux chip are active. ...
    Discussions and forums
    How to protect RS232 RX/TX lines from overvoltage/overcurrent, not from ...
    EEVblog · 
    2 years ago
    How to protect RS232 RX/TX lines from overvoltage/overcurrent, not from ...
    EEVblog · 
    2 years ago
    Both lines have continuous protection but the 330R resistor will get hot, and a 5W part is a bit crazy so the fuse is worth putting in. You ...  More
    Which RS232 Protection Circuit is Better: RS232_Protect_1 or ...
    Physics Forums · 
    14 years ago
    Which RS232 Protection Circuit is Better: RS232_Protect_1 or ...
    Physics Forums · 
    14 years ago
    I have attached two different schematics of circuits that I thought would be capable of protecting RS232 signals.  More
    See more
    More products
    • Apc Rs-232 Dce Serial Port Protector - Ps25-dce.
      Apc Rs-232 Dce Serial Port Protector - Ps25-dce
      $16.95Pre-owned
      eBay - software-to-go
      Free delivery
      Apc Rs-232 Dce Serial Port Protector - Ps25-dce
      $16.95Pre-owned
      eBay - software-to-go
      Free delivery
    • RS-232 / RS422 In-Line Surge Protector.
      RS-232 / RS422 In-Line Surge Protector
      $85.00
      B-TEK Scales
      RS-232 / RS422 In-Line Surge Protector
      $85.00
      B-TEK Scales
    • RS232 to RS485 Converter.
      RS232 to RS485 Converter
      $52.60
      Newegg.com - Fany
      Free delivery
      RS232 to RS485 Converter
      $52.60
      Newegg.com - Fany
      Free delivery
    • 1PC Port Powered RS232 To RS232 Serial Port Optic Electric Isolator Protect PC RS232.
      1PC Port Powered RS232 To RS232 Serial Port Optic Electric Isolator Protect PC RS232
      $32.35
      Newegg.com - Hetai
      Free delivery
      1PC Port Powered RS232 To RS232 Serial Port Optic Electric Isolator Protect PC RS232
      $32.35
      Newegg.com - Hetai
      Free delivery
    • Rs232 Serial Port Surge Protector Db25 Male/female.
      Rs232 Serial Port Surge Protector Db25 Male/female
      $7.99
      eBay - cwc-group
      Rs232 Serial Port Surge Protector Db25 Male/female
      $7.99
      eBay - cwc-group
    • TP232 RS-232 Surge Protector – Triple-Stage Serial Protection.
      TP232 RS-232 Surge Protector – Triple-Stage Serial Protection
      $228.00
      SellEton Scales
      Free delivery
      TP232 RS-232 Surge Protector – Triple-Stage Serial Protection
      $228.00
      SellEton Scales
      Free delivery
    • 3onedata Technology Isolation Protector Model 2321 Rs-232.
      3onedata Technology Isolation Protector Model 2321 Rs-232
      $49.50
      eBay
      Free delivery
      3onedata Technology Isolation Protector Model 2321 Rs-232
      $49.50
      eBay
      Free delivery
    • RS232 Optical Isolator.
      RS232 Optical Isolator
      $13.36
      eBay - suhu23_6       & more
      RS232 Optical Isolator
      $13.36
      eBay - suhu23_6       & more
    • UT-211 RS-232 Serial Port Optoelectronics Isolator.
      UT-211 RS-232 Serial Port Optoelectronics Isolator
      $31.59
      Newegg.com - heimakeji
      Free delivery
      UT-211 RS-232 Serial Port Optoelectronics Isolator
      $31.59
      Newegg.com - heimakeji
      Free delivery
    • Port Powered RS232 to RS232 Serial Port Optic Electric Isolator.
      Port Powered RS232 to RS232 Serial Port Optic Electric Isolator
      $23.04
      Newegg.com - Fany
      Free delivery
      Port Powered RS232 to RS232 Serial Port Optic Electric Isolator
      $23.04
      Newegg.com - Fany
      Free delivery
    People also search for
    Passive rs232 protector adapter
    Passive rs232 protector amazon
    Modbus surge protection
    USB to RS232 / RS485 Converter
    Ethernet to RS232 Converter
    Industrial RS232/RS485 to Ethernet Converter
    Serialcomm usb iso 485
    RS422 Repeater

    Page Navigation

    12345678910Next

    Footer Links

    Metro Vancouver, British Columbia, Canada
     - Based on your past activity
     - 
    Update location
    Can't update your location
    Learn more
    Updating location...
    HelpSend feedbackPrivacyTerms
    Google apps