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This Siemens 3SB3205-0AA61 pushbutton unit includes a pushbutton actuator, a lamp holder (lamp not included), and two contact blocks. The pushbutton has a white flat surface and actuates the normally closed (NC) and normally open (NO) contacts for momentary on/off cycle operation. The contact blocks are rated at up to 230V and up to 10 amps. The pushbutton mounts through a 22.5 mm diameter control panel hole and snaps into the holder on the back side of the panel. The contact blocks snap into the holder and have wire connections. The unit has an operating temperature range of -25 to +70 degrees C and meets the Ingress Protection (IP) 65 standard for protection against dust and liquids. This pushbutton unit conforms to the European Committee for Electrotechnical Standardization (CENELEC) EN 60947-5-1 standard for control circuit devices and is suitable for momentary operation in applications such as manufacturing process control systems.
|Pushbutton type||Flat-surface white button, illuminated (lamp not included), includes BA 9s lamp holder and two contact blocks|
|Power input||Up to 230V, up to 10 amp|
|Contact type||1 NO + 1 NC|
|Wiring type||Screw-type, spring-loaded terminals|
|Mounting hole diameter||22.5 mm|
|Operating temperature range||-25 to +70 degrees C|
|Degree of protection||IP65|
|Specifications met||EN 60947-5-1|
Pushbutton switches make or break electrical connections as part of a system that controls a process, such as a manufacturing line. Indicator lights with labels or color-coded caps are used to display the current state of a process, such as "completed." The pushbutton unit is composed of a pushbutton actuator for making or breaking electrical connections, a holder for securing the actuator to a control panel and for housing a light, and one or more contact blocks for connection to electrical wiring. Contacts within a contact block can be normally open (NO) or normally closed (NC), so that pressing the button starts or stops a process. Holders accommodate a range of control panel thicknesses and may include lamps to illuminate the button. Pushbutton actuator head types include mushroom, flat-surface, raised-surface, and key-operated, and may be illuminated, color-coded, and labeled. According to the requirements of an application, actuators may operate only as long as the button is held or they may lock into position when pushed and unlock when pulled or twisted. Pushbuttons and indicator lights are used in applications such as manufacturing process controls and as emergency shutoffs in industrial workplaces.
Siemens manufactures electronic products for building automation, industrial drives, lighting, energy generation, medical equipment, and rail transportation. The company, founded in 1847 and headquartered in Munich, Germany, meets International Standards Organization (ISO) standards 14001, 9001 and TS 16949.
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