This Product Selection Guide contains information to help select products in the Thumbwheel Switches category on DigiKey.com
Thumbwheel Switches are a device that accomplishes its function using a rotary disk with the output code variations of BCD, decimal, hexadecimal, octal, resistor decade, or SPDT. Actuator types include leverwheel, pushwheel, rocker, or thumbwheel. Other characteristics are readout, number of sections, display characters/height, actuator type, contact rating, and mounting type.
SelectionCharacteristics
Output Code: Describes the pattern by which the legend on the switch face translates into electrical signals on the switch’s output connector.
Read Out: Indicates the range of values displayed on a switch face across its range of travel.
Number of Sections: The number of switch modules contained within a product as sold; the number of switches in an array.
Display Characters - Height: Indicates the vertical dimension of the digits/letters used by a device to visually display information about some quantity measured or controlled by a device.
Actuator Type: The specific design or style of the mechanism used to change the switch position.
Contact Rating @ Voltage: Typically this represents the maximum current to which a device’s contacts will meet their given specifications at a given voltage. Exceeding this current may damage the device and/or other system components.
Contact Material: The material used for switch contacts.
Contact Finish: Indicates the finish/plating material applied to the contacts of the device.
Mounting Type: Indicates how the device is attached.
Termination Style: Selection of termination style used to connect the device to a system, such as PC pin, or screw terminal.
End Caps: Indicates whether end caps used for completion of a modular assembly are included or sold separately.
Section Width: The center distance between devices when stacked together in an array.
Panel Cutout Dimensions: Refers to the measurements or dimensions of the opening or cutout in the panel.
Features: These are different capabilities or properties of the device such as a dust lens, or sealed contacts.
Operating Temperature: Recommended operating temperature, typically given in a range or as a maximum. Exceeding these temperatures may affect performance or damage the device and other system components.
ProductExamples
| MFR PART # | SMCD131AK2 |
|---|---|
| DIGIKEY PART # | 679-3541-ND |
| MANUFACTURER | APEM Inc. |
| DESCRIPTION | Thumbwheel Switch BCD 0.1A @ 40VAC/DC Panel Mount, Snap-In |
| DATASHEET | Click Here |
| MFR PART # | 302119000 |
|---|---|
| DIGIKEY PART # | CKN1187-ND |
| MANUFACTURER | C&K |
| DESCRIPTION | Thumbwheel Switch BCD 0.1A @ 120VAC/28VDC Panel Mount, Screw |
| DATASHEET | Click Here |
| MFR PART # | A7PS-206 |
|---|---|
| DIGIKEY PART # | Z11572-ND |
| MANUFACTURER | Omron Electronics Inc-EMC Div |
| DESCRIPTION | Thumbwheel Switch BCD 0.1A @ 50VAC/28VDC Panel Mount, Snap-In |
| DATASHEET | Click Here |