Breakdown of the Technical Specs
S20R: This typically designates the physical series, frame size, or style of the housing unit (often denoting a 20A capacity or a specific 20mm round layout format).
PCLR: Represents the functional configuration. In automation hardware, this signifies Pole-Clearance configuration or a specialized Latch/Reset circuit mechanism.
12F3: This identifies the specific electrical coil voltage and design standard.
12: Dictates a 12V DC / AC power supply requirement.
F3: Indicates the classification frequency, standard frame layout, or the specific contact material configuration code.