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    About 2,150,000 results (0.25s) 
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    An AI Overview is not available for this searchCan't generate an AI overview right now. Try again later.
    AI Overview
    A single-phase AC load Solid State Relay (SSR) is a non-contact electronic switch used to control high-voltage AC loads (
    24
    −480
    V AC
    ) using low-power input signals (
    3
    −32
    V DC
     or
    70
    −280
    V AC
    ). They offer silent, fast switching, high reliability, and long life for resistive (heaters) and inductive (motors) loads, though they require heatsinks to manage heat generated during operation. 
    Key Features and Specifications 
    • Types: Available as DC-controlled AC (DC-AC, 3-32VDC input) or AC-controlled AC (AC-AC, 70-280VAC input).
    • Load Voltage: Standard units handle
      24
      −380
      V AC
       or
      90
      −480
      V AC
      .
    • Current Ratings: Common ratings range from
      10
      A
       to
      120
      A
      .
    • Switching Method: Typically zero-crossing (turns on at
      0
      V
      ), which reduces surge current for resistive loads.
    • Isolation: Uses opto-electronic technology for input-output isolation. 
    Selection and Installation Guide 
    • Current Derating: For longevity, select an SSR with a max current rating higher than the load.
      • Resistive Loads (Heaters): Choose an SSR with a rating
        2
        −3
         times the actual load current (e.g., a
        10
        A
         load requires a
        25
        A
         or
        40
        A
         SSR).
      • Inductive Loads (Motors/Transformers): Choose an SSR with a rating
        4
        −6
         times the actual load current.
    • Heat Management: Crucial. A heat sink is necessary to prevent overheating. Apply thermal grease or a thermal pad between the SSR and the heatsink.
    • Protection: Use fuses to protect the semiconductor components from short circuits. 
    Common Applications 
    • Temperature controllers for industrial heating.
    • Industrial automation and motor control.
    • Lighting control systems.
    • Packaging and vending machinery. 
    Popular Models: SSR-25DA (
    25
    A
     DC-AC), SSR-40DA (
    40
    A
     DC-AC), SSR-40AA (
    40
    A
     AC-AC). 
    • DC-AC/AC-AC Single Phase Solid State Relay
      Dec 28, 2022 — this is an introduction to ATO singlephase solidstate relays in this video we will take a quick look at some of the available mode...
      3m
      YouTube·ATO Automation
    • TWTADE SSR Solid State Relay + Heat Sink - Amazon.com
      Model: SSR-40DD ... 1. The current on the product is the maximum load current, not the rated current. 2. On the basis of the diffe...
      Amazon.com
    • DEBLAN Single Phase Solid State Relay AC-AC SSR 10A ...
      Solid state relay ideal for automatic process control application, a must component for temperature controller and other machinery...
      Amazon.com
    • Solid State Relay Voltage AC Load Single Phase SSR DC-AC 10A ...
      Item description from the seller. See full description. Solid State Relay Voltage AC Load Single Phase SSR DC-AC 10A 25A 40A 12V 3...
      eBay
    • Din Rail Heat Sink Single Phase SSR Solid State Relay 10A 25A ...
      Product Description. Relays 10A 25A 40A 60A 80A 100A 120A Din Rail Mounted Solid State Relay SSR Single Phase DC Control AC With H...
      Amazon.com
    • Solid State Relay (SSR) Guide - Peerless Electronics
      Jul 1, 2025 — Table_title: Advantages and Disadvantages of SSRs Table_content: header: | Advantages (Pros) | Disadvantages (Cons) | row: | Advan...
      Peerless Electronics
    • Single phase AC to AC solid state relay - Finglai electric
      1. Model selection method: calculate the load current, according to load type, multiply the balance factor. Resistive load: balanc...
      Finglai
    • What is Solid State Relay | ATO SSR Overview
      Dec 8, 2022 — a solid state relay or SSR for short is an electrical switch that can be used to operate a higher voltage circuit using a low volt...
      3m
      YouTube·ATO Automation
    • DC-AC/AC-AC Single Phase Solid State Relay
      Dec 28, 2022 — this is an introduction to ATO singlephase solidstate relays in this video we will take a quick look at some of the available mode...
      3m
      YouTube·ATO Automation
    • TWTADE SSR Solid State Relay + Heat Sink - Amazon.com
      Model: SSR-40DD ... 1. The current on the product is the maximum load current, not the rated current. 2. On the basis of the diffe...
      Amazon.com
    • DEBLAN Single Phase Solid State Relay AC-AC SSR 10A ...
      Solid state relay ideal for automatic process control application, a must component for temperature controller and other machinery...
      Amazon.com
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    Web results

    DEBLAN Single Phase Solid State Relay AC-AC SSR 10A ...


    Amazon.com
    https://www.amazon.com › DEBLAN-Single-SSR-10A...
    Amazon.com
    https://www.amazon.com › DEBLAN-Single-SSR-10A...
    Solid state relay ideal for automatic process control application, a must component for temperature controller and other machinery control system.Read more
    30-day returns

    AC Input AC Load SSR Solid State Relay


    Maxwell-fa.com
    https://www.maxwell-fa.com › ac-input-ac-load-ssr-solid...
    Maxwell-fa.com
    https://www.maxwell-fa.com › ac-input-ac-load-ssr-solid...
    The Maxwell MS-1DD60 series is a high-performance, single-phase DC to DC solid state relay designed for reliable switching in demanding industrial applications.Read more
    Videos
    DC-AC/AC-AC Single Phase Solid State Relay
    YouTube · ATO Automation
    Dec 28, 2022
    YouTube · ATO Automation
    3:49
    ATO single-phase solid-state relays offer DC-AC and AC-AC control with zero crossing, RC absorption, and 10-120A load ratings.
    ATO Automation
    YouTube·
    Dec 29, 2022

    DC-AC/AC-AC Single Phase Solid State Relay

    YouTube·ATO Automation·Dec 29, 2022
    YouTube
    Solid State Relay (SSR) Explained | How to Wire & Use SSR ...
    Facebook · PLC Programming Tips and Tricks
    Dec 15, 2025
    Facebook · PLC Programming Tips and Tricks
    0:58
    How to use SSR - Solid State Relays
    YouTube · Saravanan AL
    Aug 1, 2024
    YouTube · Saravanan AL
    5:12
    SSR relays have no physical contact, enabling high speed & frequency. Connect 5V supply and trigger with a low-level ground signal.
    Saravanan AL
    YouTube·
    Aug 2, 2024

    How to use SSR - Solid State Relays

    YouTube·Saravanan AL·Aug 2, 2024
    YouTube
    View all

    Web results

    SSR-100AA single phase AC to AC 100A 480V solid state ...


    Finglai
    https://www.finglai.com › relays › solid-state-relays › SS...
    Finglai
    https://www.finglai.com › relays › solid-state-relays › SS...
    Model number, SSR-AA series. Rated input control voltage, 80-250VAC 50/60Hz. Rated input control current, 12mA. Pick-up voltage, 90Vac.Read more
    $5.90 · In stock
    People also ask
    What is the difference between AC SSR and DC SSR?
    An AC solid state relay is designed to control alternating current loads, while a DC solid state relay switches direct current circuits. Choosing the correct type depends on your load voltage, current requirements, and application environment.

    Solid State Relays (SSR Relays) | AC & DC Electronic Relays


    CIT Relay & Switch
    https://www.citrelay.com › product-category › solid-state
    CIT Relay & Switch
    https://www.citrelay.com › product-category › solid-state
    What is SSR in HVAC?
    Solid State Relay (SSR) A solid state relay (SSR) has no moving parts. It is a transistor activated by a small AC or DC control signal produced by the temperature controller. This type of relays can switch up to several hundred amps in less than a second.

    Solid State Relay (SSR) - Delta T


    Delta T
    https://www.deltat.com › ssr
    Delta T
    https://www.deltat.com › ssr
    Can SSR relays be used with AC and DC?
    Depending on the specific model and intended application, a solid state relay can be designed to operate with either AC or DC input signals. Common DC input voltages include 5V, 12V, and 24V, while AC input models typically operate at standard line voltages, e.g., 120V or 240V.Jul 1, 2025

    Solid State Relay (SSR) Guide - Peerless Electronics


    Peerless Electronics
    https://peerlesselectronics.com › Blog
    Peerless Electronics
    https://peerlesselectronics.com › Blog
    What is SSR in power supply?
    A Solid State Relay (SSR) is a relay that does not have a moving contact. In terms of operation, SSRs are not very different from mechanical relays that have moving contacts. SSRs, however, employ semiconductor switching elements, such as thyristors, triacs, diodes, and transistors.

    Technical Explanation for Solid-state Relays


    Technical Explanation for Solid-state Relays
    https://www.ia.omron.com › guide › ssr_tg_e_9_3
    Technical Explanation for Solid-state Relays
    https://www.ia.omron.com › guide › ssr_tg_e_9_3

    Web results

    Solid state relay SSR-120AA, 120A 70-280V AC to AC


    ATO.com
    https://www.ato.com › ... › Relays › Solid State Relays
    ATO.com
    https://www.ato.com › ... › Relays › Solid State Relays
    Affordable price single phase solid state relay SSR-120AA, load current rating up to 120A, zero cross switching type, AC control AC,70-280V AC input voltage ...
    $77.69 · In stock · Free delivery · 30-day returns

    Solid State Relay (SSR) Guide


    Peerless Electronics
    https://peerlesselectronics.com › Blog
    Peerless Electronics
    https://peerlesselectronics.com › Blog
    Jul 1, 2025 — AC vs DC SSR ... On the output, or load, side, connect the terminal labeled T1 (sometimes marked “load”) to one side of the AC-powered device.Read more
    Discussions and forums
    SSR output for AC inductive loads
    Reddit · 
    r/PLC
     · 10+ comments
     · 2 years ago
    SSR output for AC inductive loads
    Reddit · 
    r/PLC
     · 10+ comments
     · 2 years ago
    My TI one leaked so bad it kept a Sonalert on at low volume continuously. The Fanuc ones died with fairly low frequency switching of GE IEC ...  More
    zero crossing - Using a solid state relay, NC type to control an AC load
    Electronics Stack Exchange · 
    3 answers
     · 1 year ago
    zero crossing - Using a solid state relay, NC type to control an AC load
    Electronics Stack Exchange · 
    3 answers
     · 1 year ago
    This type of SSRs with back-to back MOSFETs can switch both DC and AC. This type of relay ...  More
    Top answer · 3 votes · a year ago
    90mA at 25VAC isn't a whole lot of power; I suspect the reason you aren't finding zero-crossing ...  More
    2 votes · a year ago
    Thyristor type zero-crossing devices wait until the voltage across them is less than some relatively ...  More
    2 votes · a year ago
    Can a soft switching SSR with an AC load work without a snubber?
    Electronics Stack Exchange · 
    1 year ago
    Can a soft switching SSR with an AC load work without a snubber?
    Electronics Stack Exchange · 
    1 year ago
    I'm trying to design a general purpose solid state relay for a variety of AC resistive and inductive loads namely heaters, motors and solenoids.  More
    See more

    Web results

    Need help wiring an AC solid state relay : r/electrical


    Reddit · r/electrical
    10+ comments · 2 years ago
    Reddit · r/electrical
    10+ comments · 2 years ago
    It uses 2 blower motors for the dust collectors. They are 120v and about 8 amps each under load. I thought using a solid state relay on each of ...Read more

    Solid State Relay Voltage AC Load Single Phase SSR DC- ...


    eBay
    https://www.ebay.com › ... › Relays › Solid State Relays
    eBay
    https://www.ebay.com › ... › Relays › Solid State Relays
    Solid State Relay Voltage AC Load Single Phase SSR DC-AC 10A 25A 40A 12V 3-32V ; Brand. Unbranded ; Input voltage · 3-32VDC(fixed current) 13mA &12V ; Output load ...Read more
    $23.53 to $26.15 · In stock · $7.95 delivery

    Solid State Relay Types: How to Choose the Right SSR for ...


    lorentzzi.com
    https://lorentzzi.com › News
    lorentzzi.com
    https://lorentzzi.com › News
    Mar 18, 2025 — DC to AC SSRs use a DC input of 3-32 V to control AC loads, while AC to AC SSRs employ an AC input of 70-280 V for the same purpose.Read more
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