De Dietrich 95325362 bipolar momentary switch

This is a De Dietrich bipolar momentary switch, catalogue article 336.559.005, with manufacturer codes 95325362 and 336.559.005. It is listed under the plugs and connectors category, though it is a switch rather than a connector. A momentary switch returns to its normal position as soon as the operator releases it; bipolar means it simultaneously switches two electrical circuits, typically both poles of a supply or two independent signal lines. In heating systems, such switches are used as lockout reset buttons on burner controls, manual mode selectors, or test switches that must not remain in the operated state. When selecting a replacement momentary switch, the key parameters are the contact rating (voltage and current), the number of poles (here, bipolar), the action (push-to-make or push-to-break, usually normally open), the actuator style (e.g., flush, raised, or key-operated), and the termination type (screw, spade, or solder). The mounting dimensions and panel cut-out must also match the switch being replaced. Because the switch is part of the control circuit, any mismatch in these parameters can cause unreliable operation or failure to reset the burner control. Always verify that the new switch has the same pole configuration and contact function as the original, and that its electrical rating is at least equal to the circuit it serves. A poor or incorrect switch may reproduce symptoms of a control fault, such as intermittent lockouts or failure to start.