Questions tagged [solid-state-relay]

A solid-state relay (SSR) is a switching device that accepts a small control signal to control a larger load current and/or voltage. In many ways they perform the same function as an electromechanical relay without any moving parts, they have many advantages but also some disadvantages compared to a mechanical relay.

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2answers
450 views

Can I switch 85V / 3kHz AC using this solid state relay?

I got this part, and I am wondering if I could use it to use it to switch ~85V @ 3000Hz. It's not working though, and the label on the chip says 50 Hz. Is frequency the reason it's not working? I have ...
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32 views

Multiplex Controllino (Arduino) 0-10V input using SSRs

I have to read six 0 - 10 V analog signals but I only have one 0 - 10 V input on the Controllino. I figure I could use six solid state relays and multiplex the signals. When a relay is on it'll allow ...
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39 views

SSR with AC valve don't turn off

I don't have much experience with solid state relays. I am going to describe my problem. I have a SMC AC valve (https://www.smcpneumatics.com/VF3130-4DZ1-01F.html) that I want to control with a Crydom ...
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1answer
47 views

Solid state relay

How to connect a solid-state relay to an output MOSFET, which has 2 drain pins without the ground which I am refering to the image in the attachment? https://www.mouser.de/ProductDetail/Toshiba/...
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What are the benefits of a solenoid over a relay in an electric cart?

I was looking over the wiring diagram of a Electric Golf Cart and noticed the use of a solenoid. The initial literature I found suggest that the solenoid is only engaged when the key is in the engaged ...
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1answer
54 views

How can I replace this simple switch, with an automated alternative?

I have a circuit that I'm changing that pulses current (maximum 1A) through an inductive load (a coil). A second coil is then used to detect the pulse transmitted from the first coil (a 2 coil metal ...
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1answer
59 views

Understanding the working of relay

I have to design a circuit where a momentary switch is used to control the main power of board. Since its a momentary switch I have a requirement of latching relay. Using only one switch I have ...
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2answers
42 views

How to select a relay for main power input

I will be using momentary switch to control the main power input in my design. Hence to latch the power I need to select a relay. On what basis should I select a relay since I find different types of ...
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1answer
46 views

Solid State Relay Heat Release

I want to use a SSR (AD-SSR6T25-DC-280A) to switch on and off a 24 VAC water solenoid valve. The solenoid has an in-rush current of .9A, with a 400mA holding current. I want to mount the SSR in an ...
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78 views

Somfy WT motor must not be driven by a solid-state relay or triac relay?

I came across this line in the installation / operating guidelines of a comfy (blinds) motor: The drive must not be driven by a solid-state relay or triac relay. Would there be any technical reason ...
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1answer
55 views

Solid State Relay Voltage

I have a basic solid state relay that switches an outlet on and off with a 9v input. Everything works good but I'm confused by the voltage readings I'm getting. The load side is reading 124 volts, and ...
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4answers
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What is the simplest and safest way to automatically make/break a ground to neutral bond in a mobile AC system?

I have an inverter/charger unit, with features I want, that is not typically used in an RV. It (unfortunately) does not automatically make/break a ground to neutral bond. I would like to automatically ...
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1answer
61 views

Can a solid state relay be energized from the same 120V AC source that it switches?

Can a 120V AC input / AC output solid state relay be energized with the same 120V source connected to its contacts? This can't be done with an electromechanical relay because it generates feedback and ...
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3answers
77 views

How to connect HY-M285 Solid State Relay?

I have just bought a HY-M285 SSR that I want to allow a 12V DC signal to control a 240V AC mains signal. I'm using this to let the 12V output from my amplifier switch my active sub-woofer on and off. ...
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1answer
81 views

How reliable are relay modules? [closed]

I would like to ask how reliable are these relay modules. Is it possible to use them in industrial application that will run non-stop for months? If not, what alternatives can I use? mechanical relay ...
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3answers
71 views

Is it true that single pole double throw solid state relay will not break before make?

I am trying to switch between two sources with solid state relay, which seems to be more robust than mechanical relay. But I can't find a SSR that can guarantee to be break-before-make. The ...
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1answer
105 views

single phase AC motor not starting with random SSR (blind control) when all wires are connected

I'm using 2 AQG22205 (see datasheet) to control my blinds. I can let the blinds go down when the up wire isn't connected and vice versa. But as soon as I connect both wires, the blinds won't move. I ...
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2answers
52 views

Can I use MOSFET as replacement for the SSR or EM relay?

I am trying to look for a solution that can help me in turning ON/OFF my 24VDC, 2A LED load. So as per the application needs I may have to turn ON/OFF this load 30 times max per day. So it is a DC ...
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0answers
35 views

Voltage rating of capacitor for SSR controlling motor (blinds) 275AC (630DC) V rating? or 600V(ac)?

I need an RC snubber to protect my SSRs that control my blinds (reversible motor). I've read a lot about which capacitor I should use (my SSR spec sheet even states to use a voltage between 400 and ...
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1answer
187 views

Dual control an output with a MCU's GPIO and a capacitive touch button (TTP223)

I am a newbie in this electronic world and English is not my first language, please be sorry for any inconvenience I may create. It was a long story for me to come up with this writing, let get a bit ...
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1answer
35 views

Bi-directional High Side Load Switch Design

I want to design a high side load switch which can allow or block DC current in either direction based on a 3.3V input. Some considerations: The 3.3V rail is potentially created as a result of power ...
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3answers
82 views

Relay being switched on even though voltage not applied?

Introduction Firstly, I was not sure if the Home Improvement SE was appropriate for this or here, so if in wrong place I can post there instead. So, what I am trying to do should be very simple to ...
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1answer
57 views

Easiest way to (quietly) drive a 2W 120VAC load (piezo air pump) from MCU-controlled 3V/5V/12V?

I'm trying to drive this piezoelectric air pump that requires 1.5W and runs on 120VAC 60Hz wall power. This will be controlled by a MCU/CPU of some kind (Raspberry Pi in this instance), so the control ...
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1answer
45 views

Is a SSR designed for AC power fundamentally different from one for DC power

A solid state relay can switch between high and low resistance with no moving parts. The control signal is a small (~10V) DC voltage. By this logic, I assumed that a SSR can switch either AC or DC ...
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1answer
87 views

Is there a simple IC for disconnecting a power source?

I'm looking to create a simple circuit to connect/disconnect a power storage capacitor to/from a larger circuit. In the model railroading world, we use capacitors as "keep-alives" to keep ...
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1answer
69 views

Effects of double snubber for TRIAC on SSR?

I'm designing a PCB where an MCU has to command a TRIAC to drive a coil, when googling an schematic for an SSR, I came across 2 snubber designs, and while researching them this question: Triac snubber:...
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1answer
45 views

Solid-state version of a uniselector (rotary relay)

What would be the circuit equivalent be of a uniselector, aka rotary relay, aka stepping relay? Uniselectors were commonly used for phone switch boards (and thus why we used to hear individual pulses)...
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1answer
89 views

Solid State Relay for Large Inductive Load

I have an old, transformer-based welding machine, which is rated to draw about 70A at 240V, at full output. It uses an electro-mechanical relay (contactor) to energize the main power transformer, and ...
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2answers
52 views

Controlling 32 solenoid valves from a single BeagleBone Black

I am trying to control 32 solenoid valves from a single BeagleBone Black. My EE skills are not up to par for this task, but I am learning. In this system, at most one solenoid will be active at any ...
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2answers
121 views

SSR controllable by independent touch button (TTP223) and I/O for Micro-controller

I am looking to solve the following problem. I want to drive an optocoupler, which will drive a triac, and I want the following to hold. I can toggle the state of the optocoupler input via a ...
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1answer
43 views

Voltage rating of snubber circuit

I am referring a solid state relay circuit from here. The circuit given is below Well I'm new to this, so dam confused with voltage rating of resistance and capacitance of snubber circuit. what would ...
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3answers
90 views

Safety of immersion water heater

I would like to build a sous-vide circularor, using a PID-controlled immersion heater. I've read that as the product wears out, there might be some electricity leakages, so I would like to make the ...
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1answer
158 views

Solid State Relay using photovoltaic MOSFET driver

I am in the process of creating a High power Mosfet based SSR. The idea is using a photovoltaic MOSFET driver such as VO1263 (SIlabs have similar IC but it uses CMOS coupling to create the isolated ...
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23 views

Increase Autopilot drive motor capacity with SSR's and maybe an arduino

I have a Raymarine X5 wheel pilot on my boat. It is simple enough, it uses a small motor to drive a belt that turns the wheel. It has a controller called an ACU (in my case an ACU-100) to take course ...
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45 views

Three phase solid state control switch

I want to get three phase input to an output when all the phases are available. If I have lines, L1, L2, L3 and like to have one of the output with any one of those phases. If any of the phase is ...
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3answers
109 views

Using a MOSFET as a relay in mains-powered circuits

I am currently planning a small project where I use a Raspberry Pi as a smart home server to switch loads (mainly door openers & lights). The usual way would be to use a mechanical relay with ...
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1answer
68 views

One way relay (manual reset )? [duplicate]

What I mean by one way relay is manually reset it to run again. What I need it for: I want a pump to run when a relay is on(manually turned on), when there is no power the relay trips and stays like ...
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1answer
34 views

Can a 3 phase solid state relay be used instead of 3 single phase relays?

Apologies if this is similar to another question, but I did look before posting. I am trying to understand what exactly differentiates a 3-phase relay from a 1-phase relay. I am controlling three 1-...
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0answers
27 views

Solid-state AC load switching for both line and neutral wires

The common TRIAC circuits for switching AC loads cut only one wire (line). I need to cut both (line and neutral). Is there a configuration to achieve this? Even most encapsulated solid-state relays ...
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1answer
81 views

Solid State Relay/High Voltage Switch unacceptable transient behavior

I am using a whole array of IXYS CPC7524 high-voltage switches in one of my designs. Although the design of this specific switch is not made explicit, its characteristics and other products in the ...
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1answer
57 views

MOC3041 TRIAC Dimming Circuit

Details: I try to build the single TRIAC circuit for ON/OFF, Dimmer(600W AC Light), and AC fan Speed Control. I trying this the first time. Problem: I using MOC3041 to control the TRIAC ON/OFF it ...
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2answers
48 views

How would I power a circuit and charge its battery simultaneously?

I have a circuit powered by a rechargeable battery. When a USB cable is plugged in, I want the battery to charge through a separate charging circuit and for the main circuit to be powered through the ...
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2answers
143 views

Difference between a DC SSR (solid state relay) and AC SSR

I am trying to understand the difference between a DC and AC solid state relay. For electromechanical relays, I notice that they are often rated for some VAC load and a smaller DC load. Solid state ...
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1answer
32 views

Solid State Relay in NC configuration

Is it possible to build an SSR relay circuit for controlling 240VAC (using TRIAC and other components) with NC configuration? The idea is to keep the AC circuit closed, even when there are failures in ...
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1answer
52 views

Turning a circuit off using a 240v signal

I have a home-built controller for a HERMS brewing system (Heat Exchanging Recirculating Mash System). The purpose of this controller is to drive liquid (wort) from a large mashing vessel (a cooler ...
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8answers
406 views

Transformer makes an audible noise with SSR but does not make it without SSR

I have a large transformer (see below) that I wanted to switch on/off from a digital platform using a solid state relay. The equipment works without any issue and makes no noise when the solid state ...
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0answers
29 views

110VAC 1-HP 10A motor VS 50-60A SSR

I'd like to build a circuit to control a 1-HP 10A motor. To switch it on and off I was thinking of using a SSR since I could pair it with a microcontroller. I've never used one before but thought I'...
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1answer
113 views

DC output of DC-controlled SSR does not turn off in simple circuit

The following simple circuit turns a LED ON/OFF. It includes: DC power supply 12V (EDR-120-12) SSR (rated for DC input and output, DR10D12, datasheet) LED, 400mA, 2.85V forward (L2-MLN1-S, datasheet) ...
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0answers
41 views

How do I control two 240v water pumps with float switches connected to one outlet pipe so that only one pump is switched on at a time

The pumps are in two different 1m deep wells that collect rain water to stop flooding they have float switches but because they use the same discharge pipe if both pumps tried to pump at the same time ...
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1answer
23 views

Panasonic PhotoMOS Relay with AC Load

I’m looking at the Panasonic 600V 40mA relay AQW216A (https://www.mouser.com/ProductDetail/Panasonic-Industrial-Devices/AQW216A?qs=QVBMgXxBiLwcjOQSSsoh0w%3D%3D) for a dual Voltmeter/Ohmmeter circuit. ...

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