Opto 22 480D45-12 DC Control Solid State Relay, Transient Proof, 480 VAC, 45 Amp, 4000 V Optical Isolation, 1/2 Cycle Maximum Turn-On/Off Time, 25 - 65 Hz Operating Frequency: Electronic Relays: Industrial & Scientific. Opto 22 480D45-12 DC Control Solid State Relay, Transient Proof, 480 VAC, 45 Amp, 4000 V Optical Isolation, 1/2 Cycle Maximum Turn-On/Off Time, 25 - 65 Hz Operating Frequency: Electronic Relays: Industrial & Scientific. This 480D4- 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 480 VAC and a current rating of 4 amp. It has zero-voltage switching to reduce arcing and to extend the life of the device, with a maximum / cycle turn on/off time. It is transient-proof for protection against voltage spikes and 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.。Specifications，Relay terminals：Screw，Coil type：AC，Resistance：,000 ohm，Optical isolation input to output：4,000V，Input voltage：480 VAC，Current rating：4 amp，Signal pick-up voltage： VDC，Signal drop-out voltage： VDC，Thermal resistance：.67 C/W，Operating temperature：-40 to +00 degrees C，Dimensions*：7 x .44. x 4. mm (H x W x D)，Standards met：UL (Underwriter's Laboratories)。CSA (Canadian Standards Association)。CE (European Conformity)。RoHS (Restriction of Hazardous Substances)，。*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 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 974, is headquartered in Temecula, CA.。 。 。 。
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