1PC Small Round Button Key Switch — DS500 (Red, 14mm, PressOpen, Lockless SelfReset) A compact, reliable momentary pushbutton switch for control panels, DIY electronics and equipment where a simple, visible reset action is needed. The DS500 is a small round button/keyswitch style actuator that opens when pressed, does not latch, and returns to its normal position automatically. Key benefits Simple, predictable operation: pressopen action with selfreset returns the button to its original position as soon as it is released — ideal for momentary commands or safety interlocks. Spacesaving design: small round form factor fits standard 14mm panel holes to minimize panel space while remaining noticeable thanks to the red actuator. Clear, functional choice: lockless (nonlatching) construction avoids accidental staysinplace conditions and reduces maintenance for frequently used controls. Singlepiece supply: sold as 1PC for singleswitch replacements or small projects. What makes it unique DS500 model: a purposebuilt pushbutton/keyswitch style device with a presstoopen, selfreset mechanism in a compact round body. Red actuator for quick visual identification of the function or emergency/stop intent. Designed specifically for 14mm panel mounting, offering a neat, standardized fit. Key attributes Model: DS500 Quantity: 1PC Action: Pressopen (opens circuit when pressed), lockless selfreset (momentary) Shape: Small round button Mounting hole: 14mm Color: Red How it solves common problems Eliminates accidental stayson: the selfreset design prevents the switch from remaining engaged after release, which is important for momentary commands and safety circuits. Easy panel integration: standardized 14mm hole size makes panel upgrades and replacements straightforward without complex modifications. Visual clarity: red button provides an obvious control point, reducing operator confusion and speeding up response in control scenarios. Typical use cases Control panel resets or momentary stop/start commands in small machinery or equipment control boxes where a visible, reliable push action is needed. DIY electronics and hobby projects that require a compact momentary button with straightforward mounting to a 14mm panel or enclosure. Test benches, prototypes, or replacement switches for appliances and devices that use a presstoopen, nonlatching control input. Installation and compatibility notes Designed for panel mounting into a 14mm diameter hole. Verify panel thickness and clearance for secure fit before final installation. Intended as a momentary, pressopen, nonlatching switch. Confirm circuit requirements and wiring compatibility with your application before connecting. one DS500 red small round button key switch when you need a reliable, compact momentary pushbutton that fits a 14mm panel hole and resets automatically after each press.