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Mininum order quantity from 1PCS 21137NA
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lead time of 21137NA is from 2 to 5 days
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60 days
60 days full quality warranty of 21137NA
1, we will give you new and original parts with factory sealed package
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Switch Contact Ratings
Switch contacts are rated with a maximum voltage and current, and there may be different ratings for AC and DC. The AC values are higher because the current falls to zero many times each second and an arc is less likely to form across the switch contacts. 21137NA APEM Components SWITCH TOGGLE
For low voltage electronics projects the voltage rating will not matter, but you may need to check the current rating. The maximum current is less for inductive loads (coils and motors) because they cause more sparking at the contacts when switched off. 21137NA APEM Components SWITCH TOGGLE
Switch Contacts
Several terms are used to describe switch contacts: 21137NA APEM Components SWITCH TOGGLE
Closed - on position, contacts conducting, there may be several on positions.
For example: the simplest on-off switch has one set of contacts (single pole) and one switching position which conducts (single throw). The switch mechanism has two positions: open (off) and closed (on), but it is called 'single throw' because only one position conducts.
Way - number of conducting positions, three or more. 21137NA APEM Components SWITCH TOGGLE
Momentary - switch returns to its normal position when released.
Open - off position, contacts not conducting. 21137NA APEM Components SWITCH TOGGLE
Pole - number of switch contact sets. 21137NA APEM Components SWITCH TOGGLE
Throw - number of conducting positions, single or double.