The S826 micro switch is a versatile micro switch for medium and low power ranges. As a changeover switch, it can open one circuit and close another circuit with one operation. The mechanical positive opening ensures reliable opening.
The S926 has an identical design to the S826 with a polyetherimide (PEI) housing. The dimensions, switch mechanism and electrical characteristics of both switches are identical. Compared to polycarbonate housing in S826, PEI is significantly more resistant to extreme temperatures, aggressive chemicals and shocks.
Watch this video explaining it
SPST stands for “single-pole single-throw” and SPDT stands for “single-pole double-throw.” These abbreviations are often used for electrical switches, relays and microswitches.
Relays are classified by number of poles and number of throws. The “poles” of a micro switch, for example, are the terminals common to each path the current can take. Any position where a ‘pole’ can be connected is called a ‘throw’. The relays are also set as NO or NC. Read more here about what NO and NC means.
SPST is the most common form and has a ‘pole’ and a ‘throw’. Like a regular light switch at home. It is illustrated as follows:
The SPDT has a double throw and is illustrated as follows:
SPDT is good as a feedback signal as you can get both normal mode and mirrored mode from e.g.. a high voltage contactor. This always shows if the circuit is complete and the position of the main contactor when one pole is NO and the other NC. Both cannot be activated at the same time but follow the “break before make” concept.
NO = Normally Open, NC = Normally Closed. This describes the state of a contactor when the voltage in the system is off. Normally open (NO) is mostly used in electrical systems where, for safety reasons, you want to be sure that the contactor opens when the power is cut in the system in case of a power failure. Normally Closed (NC) is often used when you want to be sure that the contactor closes a circuit in the event of a voltage drop, such as a power failure. to drain the system of energy to earth.
Read more about our DC contactors for both high and low voltage here.