1 pcs
Mininum order quantity from 1PCS AT442A
Mininum order value from 1USD
2 days
lead time of AT442A is from 2 to 5 days
12 hours
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60 days
60 days full quality warranty of AT442A
1, we will give you new and original parts with factory sealed package
2, Quality warranted: All products have to be passed our Quality Control before delivery.
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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. AT442A NKK Switches CAP .394"DIA BK FOR EB/M2B/MB20
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. AT442A NKK Switches CAP .394"DIA BK FOR EB/M2B/MB20
Switch Contacts
Several terms are used to describe switch contacts: AT442A NKK Switches CAP .394"DIA BK FOR EB/M2B/MB20
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. AT442A NKK Switches CAP .394"DIA BK FOR EB/M2B/MB20
Momentary - switch returns to its normal position when released.
Open - off position, contacts not conducting. AT442A NKK Switches CAP .394"DIA BK FOR EB/M2B/MB20
Pole - number of switch contact sets. AT442A NKK Switches CAP .394"DIA BK FOR EB/M2B/MB20
Throw - number of conducting positions, single or double.