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This Opto 22 240A45 solid state relay provides faster response time than an electromechanical relay and resists vibration. The panel mount requires the use of a thermal interface material such as a pad or compound (not included) placed between the back of the relay and the conductive panel or heat sink and is attached with screws (not included). On the front of the relay, four terminal screws attach control and load wires. The diode has an optical isolation of 4,000 VAC, and the device has a voltage rating of 240 VAC and a current rating of 45 amp. It has zero-voltage switching to reduce arcing and to extend the life of the device, with a maximum 1/2 cycle turn on/off time. It also has a built-in snubber for preventing arcing across contacts. This solid state relay is suitable for use in industrial process control applications such as temperature control, motors, lamps, solenoids, valves, and transformers, among others.
SpecificationsRelay terminalsScrewCoil typeACResistance33 kohmOptical isolation input to output4,000VInput Voltage240 VACCurrent rating45 ampSignal pick-up voltage85 VACSignal drop-out voltage10 VACThermal resistance0.67 C/WOperating temperature-40 to +100 degrees CDimensions*57 x .44.5 x 24.6 mm (H x W x D)Standards metUL (Underwriter's Laboratories)CSA (Canadian Standards Association)
CE (European Conformity)
*H is height, the vertical distance from the lowest to highest point; W is width, the horizontal distance from left to right; D is depth, the horizontal distance from front to back.
Relay switches (also called an electrical relay or an electrical relay switch) use a small amount of power to control a larger source of power connected to electrical devices such as car motors, computers, and lighting installations. A basic relay switch has a control circuit with an electromagnetic coil and a load circuit with contacts and a lever. When current flows into the relay switch, it moves through the coil and a magnetic field is created, which causes the lever in the load circuit to move between contacts, either turning the device on or off. In a normally open (NO) relay switch, when power is supplied to the relay, the load circuit is closed and the power source connected to the relay is turned on. In a normally closed (NC) relay switch, when power is supplied to the relay, the load circuit is open and the power source connected to the relay is turned off. In other types of relay switches, non-moving parts such as transistors or semiconductors can be used as the control circuit to operate the switching mechanism. Relay switches can be controlled with an external switch, such as a light switch, or they can be connected to an automatically switched power source, such as a car ignition. One relay can operate multiple switches, and multiple relays can be operated with a single switch, with each relay operating independently from the other relays in the system.
Opto 22 manufactures controllers for automating equipment, input/output (I/O) systems, solid-state relays, and software products that link electric, mechanical, and electronic devices to networks and computers. The company, founded in 1974, is headquartered in Temecula, CA.
James R.
Reviewed in the United States on July 2, 2021
Has been working now for a couple of weeks in my 2.5 ton freezer compressor. 60 amp locked rotor current, 12 amp run current, 240v ac. Mounted with thermal compound to a piece of aluminum. Shows one volt RMS drop when switched on. Pressure switch contacts last much longer by operating the relay instead of the full compressor load.
Geezee
Reviewed in the United States on June 5, 2021
I used this to replace a 50A relay for an older heat press, Hix Basix B-400. It does not come with a thermal paste so ensure you have it on hand before replacing your older SSR. Overall, solid product and I would recommend this product since it carries a lifetime warranty from the manufacturer.
Robert Scott Jr.
Reviewed in the United States on December 8, 2021
Direct replacement part so no problem there. Arrived in good condition within the time specified. It's fixed!
Jay Fame
Reviewed in the United States on September 2, 2017
I love it, and I replace it myself... Now my heat press is just like New.
Customer
Reviewed in the United States on June 17, 2017
I have no problem with the product since I returned it, but I have since gotten twice a reminder to return it otherwise I will be charged again. Once they apologized for the automatic reminder and now it happens again. Just annoying to deal with them.
Ashley
Reviewed in the United States on August 8, 2015
This product came in protecting packaging and it works flawlessly! It fixed my heat press and I couldn't be happier! Definitely worth the money!
tara rogers
Reviewed in the United States on July 28, 2015
Worked perfectly for my heat press
Christopher Bart
Reviewed in the United States on February 24, 2012
I needed to control a group of CFLs, and found that a conventional relay quickly burned out. The surge current for CFLs can be a big multiple of the running current, and this device has what is called zero-crossing turn-on. What it means is that it greatly reduces the turn-on surge by waiting until the sine wave crosses zero and then turns on. The curve of the sine wave reduces the spike generated.
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