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.

Filter by
Sorted by
Tagged with
0
votes
1answer
41 views

Switch LED with Solid state relay (PhotoMOS)

The SSR is a PhotoMOS AQY211EHAX rated to drive 1 amp. I seem to be shorting the output side of the SSR. Is a pull down resistor normally required on the output side or am I missing something ...
1
vote
1answer
131 views

Why does this Mosfet get Hot?

I have an IRF740 mosfet that doesn't get hot in one circuit but then gets completely hot in another identical circuit and for the life of me can not figure out why. Well the circuits aren't exactly ...
0
votes
2answers
36 views

Using a step by step relay along with a solid state relay

I have a step by step relay which is connected to a light bulb and to a manual switch. In parallel with the manual switch I put a SSR. I command the SSR to be on for 0.5 seconds, however the light ...
0
votes
1answer
29 views

Help with wiring a temperature controller and a solid state relay

I have a problem that's probably patently obvious to someone in the know but alas, that's not me. Long and short- I have a 240v heating table (aluminum table with silicone heating pads underneath) ...
0
votes
0answers
38 views

MOSFET relay as an alternative for TRIAC relay

i am using in one application TRIAC relay non cross 2 A from sharp. unfortunately i have not found this type of relay, and i want to use another relay but this relay is MOSFET relay 2A from TWOARD. ...
0
votes
1answer
68 views

Two state switch using transistor (bi-directional)

I have an existing pair of wires driving a servo motor. One of them is +12V, the other one 0V. Depending on the rotation direction of the motor, the voltage flips. I now want to put an optional ...
0
votes
0answers
80 views

How to measure ON Resistance of a Solid state relay?

I am new to use Solid state relays (SSR). For my application i am using Panasonic 'AQV252G3' relay. i want to measure ON Resistance of this relay, according to the datasheet it ranges between 0.033 ...
0
votes
1answer
49 views

Questions about an on-off control comparator circuit driving an SSR

I was doing on-off temperature control for around 40‎°C for an enclosed unit manually by switching on and off a 1100W heater(with a fan) with my hand. The accuracy is not very important roughly 40‎°C ...
0
votes
0answers
15 views

TRIAC based SSR output wiring COMPARISON

I want to use a triac based SSR (AQH-3213), I checked the datasheet wiring diagram, and it seemed simple. The problem is that its construction is the same as the triac driver optocoupler (MOC3041), ...
0
votes
0answers
55 views

Solid State Relay is giving off voltage even when turned off

I'm currently creating a circuit according to this schematics i made. I have removed some irrelevant parts for simplification sake. The SSR in question is a 861SSR210-DC-1. When 5v is applied between ...
0
votes
1answer
18 views

Esp8226 with opto mosfet switch LBA110

I want to switch AC load by LBA110 because it has NC switch pole and tiny side. I tried to read datasheet, but with my bad knowledge about electric, I can not find out how to make it work. Is it work ...
0
votes
1answer
61 views

How to improve flash time on lights controlled by solid-state relay via Arduino?

My goal is to flash lights around the house on and off to the beat of a song. When doing this with a mini LED and an arduino, it works perfectly with a "flash_time" of ~.1 seconds. This means ...
0
votes
2answers
82 views

Why SSRs for heaters?

In the context of building PID controllers for very large heater systems (ovens, kilns, etc.) nearly all the designs I encounter use an SSR to switch the load, a choice I don't understand. The power ...
0
votes
1answer
35 views

Can AC voltage phase change across an SSR?

I got an SSR (Picker PCS15-D-240A-25ZL) to control a single phase 240VAC North American circuit going to a heating element on a homebrew setup. One of the load wires goes through the SSR and the other ...
0
votes
2answers
55 views

Solid state relay Crydom D1D07 closes and remains closed

I have a Crydom D1D07 solid state relay and the control side is a +5 V DC on terminal 3 and a +3.4 V DC (don't ask) on terminal 4. When terminal 4 is switched to ground (from +3.4 V ...
0
votes
1answer
32 views

Asynchronous single phase Motor do not start

I have got from my company scrap an old Alcatel Vacuum Pump. After taking apart the pump and cleaning everything, I tried to make the motor run. Unfortunately apart a noisy 50 Hz the motor don't turn....
1
vote
0answers
54 views

Controling a Washing Machine AC Motor Using a Relay

I would like to control the motor of my washing machine using an Arduino. It's an old washing machine with a mechanical controller and an AC motor connected to a 12.5 uF run/start capacitor. According ...
0
votes
2answers
103 views

Would it be possible to use a solid state relay as a dimmer switch?

I wanted to make a smart switch with a dimmer using an arduino and a solid state relay. I was wondering if this would be possible and if their would be any problems if I tried to do so. Also, the ...
0
votes
1answer
139 views

Circuit Board Design…Getting Rid Of A Relay and Adding a Choke and Capacitor Filter?

simulate this circuit – Schematic created using CircuitLab Figure 1. Original Schematic Is there any way to get rid of the relay in this circuit? And would it be wise to add in a power ...
0
votes
0answers
40 views

Usuing P_channel mosfet to make o normally closed switch

Hi, I am trying to implement a normally closed switch. In the shown circuit: Vcc = 16..60V (Vcc>>Vz) The characteristics of the P-mos are: Vth = -1V Rdson = 0,055ohm The circuit works correctly: in ...
1
vote
1answer
76 views

Sizing Flyback Diode

I'm working on a project to run a 12 volt 12 amp DC gearmotor via PWM output from a controller. I am using a Crydom solid state relay to power and motor and trying to figure out what diode is correct ...
2
votes
2answers
53 views

Creepage on SMT DIP package with an NC pin

I'm having trouble understanding how the CPC1972GSTR can have the specs it does. Here's the datasheet. In particular, it has a blocking voltage spec of 800V, but if you look at the recommended ...
0
votes
1answer
114 views

Sequentially driving multiple stepper motors with 1 driver and 1 controller

I am trying to control multiple stepper motors sequentially (only one at a time) with one controller, one driver a multiplexer and a dedicated "relay" circuit (shown in red). The idea is instead of ...
1
vote
0answers
81 views

What does Low level and High level mean on a Solid State Relay

I wand to control some 220V lights with 12V but don't want the noise of s normal relay. So I saw these SSR but do not understand what Low level and High level mean. Is high level normally closed or ...
-1
votes
1answer
48 views

Connecting a space heater through an Arduino-controlled relay

I'm considering connecting a space heater to a relay such as this: http://www.handsontec.com/dataspecs/2Ch-relay.pdf The goal is to control it remotely using a GSM data connection. The relay is ...
2
votes
1answer
57 views

Digital pin connected to SS relay: voltage is 2V across control inputs when digital pin is supplying 5V

I have a digital pin, from an ED-008, with 0/5V outputs. However, when I connect the pin to the control inputs of a solid state relay, I only see 0/2V at the relay inputs; the relay requires 3.5V to ...
2
votes
1answer
138 views

SSRs influenced by physical proximity?

This is part of a two-head EVSE. The two solid-state relays are used to drive contactors that supply high current power to the vehicles. I used to use a MOC3040 based triac circuit for this job, but ...
0
votes
0answers
43 views

Using only one channel of 3-phase SSR

Is it possible to use 3-phase SSR for driving a single phase heater? The other two channels would be simply not connected. Is this going yo work as a single phase SSR? The particular model of the SSR ...
1
vote
1answer
101 views

Solid state relay (SSR40) behaves weird

I'm trying to connect a Solid state relay using Arduino Nano. I have a push button on the circuit when press, turn on a water pump (1.5hp). I was able to make the circuit and code for the push button ...
0
votes
0answers
24 views

Optocoupler or transistor.. which is good for high load relays using Arduino

I'm a newbie or a beginner with electronic stuffs. I'm trying to switch on/off a 1.5hp water pump using Arduino. I've got a 40 amps solid state relay in which the coil voltage is 12-36v. So for that I'...
3
votes
3answers
145 views

Protecting against a SSR failing closed

In a project I'd like to control a heating circuit with an SSR, and I'd need a contingency plan for when the SSR fails closed, and the microcontroller cannot turn off the heating element, which would ...
0
votes
1answer
48 views

Protection for Solid State Relay.. Advice please

Please excuse me if this question is not appropriate for this site.. I wish to switch a Pool Pump using a Solid State Relay.. The pump is rated at 10Amps, 240 Volts AC. Allowing for a safety margin, I ...
0
votes
1answer
80 views

Relay or SSR for electrical heating from tado smart thermostat?

I have a Tado smart thermostat system to switch my electrical underfloor heating. It offers a simple NO or NC switch. This is rated at up to 6A. (Aside: Tado is not a good company. They provide no ...
0
votes
2answers
237 views

Solid state relay does not reset

I replaced some old electromechanical relays by those solid state relays from Wieland to improve the switch speed of my system but I can't manage to switch off the solid-state relay. Here is the ...
1
vote
1answer
62 views

Nodemcu responds badly to power swing

I'm using NODEMCU and SSR modules to turn on / off the lamps with WiFi. Nodemcu uses I = 80mA and V = 5v as its input current and voltage (Vin pin). It worked without any problems with a single lamp ...
0
votes
0answers
13 views

SSR connection between converter and generator in wind systems.

Can I use the solid-state relay to connect the generator and converter? I want to disconnect the converter and generator at fault conditions of grid. I wonder if SSR can work well under discrete ...
1
vote
0answers
39 views

The best type of electronic switch to control the signal coming from a pickup coil on a motorcycle

So, my motorcycle has an ignition system that's not really secure, all someone has to do is pull the ground wire going to the ignition coil and anyone can start it up. The only other way to stop it is ...
1
vote
1answer
60 views

How can I determine the voltage the resistive load in this relay?

I am hoping someone can help me understand something. I'm an engineering student trying to analyze this circuit, but am finding myself not understanding and going in circles somewhat. I've searched as ...
1
vote
0answers
160 views

esp32 resets when relay switches from ON state to OFF state

When I switch a 12v relay from ON to OFF using esp32 then the ESP is restarted. Also it happens only when there is an AC load. I control 12V relay with a transistor. This is my relay How to solve ...
0
votes
2answers
93 views

Protecting a relay/SSR when driving AC window cover motor

I'm having trouble switching an AC motor. Relays spark and glue contacts, and SSRs start to flicker and not pass the full input after a while. The motor has 3 terminals for 230VAC mains. One is ...
-2
votes
4answers
76 views

How to find max load limit in datasheet?

I have а datasheet but I don't understand: how to find max load limit in datasheet? Can I use this SSR to switch the load (12V DC), and what current can I count on? Thanks.
0
votes
2answers
107 views

Software controlled variable voltage AC supply with SSR relays

I have an autotransformer like this one : I would like to control it with an arduino solid state relay like this one: What would happens if I wire every output of the transformer together to the ...
0
votes
2answers
171 views

Do I need to limit logic current into this SSR

This Opto22 OAC5 (datasheet link below) relay has a logic input current of 12mA. I am building a transformer/rectifier to feed the logic switch. Can I just connect the power to the input or does it ...
0
votes
0answers
98 views

Achieving minimum load current for a zero crossing SSR relay for weak loads

I'm trying to achieve the minimum load current for this AC SSR which is 50mA. My previous question revealed that zero crossing SSRs need minimum load current operate. I didn't want to ask many ...
0
votes
1answer
36 views

Circuit to a/b switch like a relay would. So an analog or digital signal can be turned on or off or routed

I need to build an arduino-based switcher / router for a multi-arcade to route controls to different game boards, and also switch 2 vga inputs into one output. Without introducing any lag also. 3 ...
0
votes
2answers
81 views

A question about using optocoupler instead of FET for longer signal wires

After my previous question I had concluded to use the following circuitry to operate this solid state relay: But now I found out that, from the micro-controller(Arduino UNO) digital output pin to the ...
1
vote
2answers
82 views

How to size these resistors for the MOSFET gate or are they redundant for this case?

I want to control this solid state relay through a 0/5V digital output. The digital output should not draw more than 10mA so I will use this FET transistor. 12V DC power supply is used to switch the ...
1
vote
1answer
285 views

Electronically connecting/disconnecting device from a CAN bus

What I'm trying to do can be best described by the following circuit based on an electromechanical relay: simulate this circuit – Schematic created using CircuitLab However, is there a simpler ...
0
votes
2answers
119 views

Component values

Can somebody clarify the following points for the MOC3041 sample circuit given at their datasheet: What are the wattages of resistors at the HOT side What is the difference between 360Ω and just 330 ...
1
vote
1answer
97 views

Replace a relay with an analog switch

I'm trying to replace a relay with a SPDT cmos analog switch MAX4678 for switching a sine wave, The switch is powered with dual power supply +5/-5 and +5 to its V_logic pin. This is what i got in ...