Product Name: KCD4 Series Single-Pole Lighted Rocker Switch (3-Pin, 125V/10A Specification)

Appearance and Structural Features:

Overall Structure: This is a black single-pole rocker switch, a compact or custom version of the KCD4 series. The switch body is square with a wide black push-rod on top.

Indicator Light Design: The rocker surface features a circular blue transparent indicator light window. When the switch is on, the internal bulb (usually neon) emits blue light, providing a clear indication of the power status, making it ideal for use in dimly lit environments.

Materials and Manufacturing:

Enclosure: Made of black high-temperature resistant engineering plastic (usually nylon PA66), offering excellent insulation, flame retardancy, and mechanical strength.

Contact Pins: Three metal terminal pins are located at the bottom (plug-in type). This 3-pin design is commonly used for single-pole double-throw (SPDT) circuits or single-pole single-throw (SPST) circuits with separate indicator light circuits. The pins are sturdy and easy to solder or plug into terminals.

Functional Design (Key Features):

Electrical Specifications: According to the laser marking on the enclosure, the switch's rated parameters are:

15A 250V AC
20A 125V AC
(Note: Although your description mentions "10A," the actual product clearly indicates a higher current rating. Typically, KCD4 switches of this type can handle higher currents at 125V. It's recommended to refer to the actual product markings or use it as a higher-specification version.)

Certification Marks: Multiple international safety certification marks are clearly printed on the back of the enclosure, including TUV SUD (German Rheinland), CQC (China Quality Certification), CE (EU Certification), CB (International Electrotechnical Commission), and KC (Korean Certification). This indicates that the product complies with multiple electrical safety standards and is of reliable quality.

Model Identification: The model code "QY603-101N/B" is printed on the side for easy tracking and inventory management.

Dimension Specifications (Based on Drawing Markings):

Panel Size: Approximately 21.4mm x 15mm (This is the key dimension for mounting holes; very compact.)
Overall Height: Approximately 24.3mm (including pins).

Application Scenarios: Due to its compact size and built-in light, it's perfect for control panels with limited space.