SPDT switch > 20A @ 32VDC?
I'm seeing SPDT toggles that are 20A at 125VAC Ebay 20A 125VACand some that are simultaneously rated to 21A at 14VDC DelCity 20A 125VAC But I want to switch a max of ~700W at ~30A, so maybe 23A? ...
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To suppress arcing a special switch is used.
The moniker is SNAP ACTION SWITCH.
Either rotary or on/off toggle, when the lever is moved it moves against a very noticeable springing action that resists the movement.
When the "over-center" point is reached, the switch makes a CLACK noise and pressure on the knob or toggle is relaxed.
Inside the switch the contacts move with blinding speed. Far faster than what fingers could accomplish.
Mercury is also used where arcing is a problem but the EPA goes into "nuclear attack mode" when the word "mercury" is seen. Ford, perhaps saw the light and dropped the "Mercury" model. Just kidding.
One note about solid-state DC relays -- good relays are NOT cheap. They have to have elaborate transient voltage spike protection built-in or they WILL fail in a short amount of time when operated at or near near maximum rating. They also demand a proper size heat sink and added together a solid state/relay and heat sink is quite a bit larger than a standard Bosch/Tyco relay.
The moniker is SNAP ACTION SWITCH.
Either rotary or on/off toggle, when the lever is moved it moves against a very noticeable springing action that resists the movement.
When the "over-center" point is reached, the switch makes a CLACK noise and pressure on the knob or toggle is relaxed.
Inside the switch the contacts move with blinding speed. Far faster than what fingers could accomplish.
Mercury is also used where arcing is a problem but the EPA goes into "nuclear attack mode" when the word "mercury" is seen. Ford, perhaps saw the light and dropped the "Mercury" model. Just kidding.
One note about solid-state DC relays -- good relays are NOT cheap. They have to have elaborate transient voltage spike protection built-in or they WILL fail in a short amount of time when operated at or near near maximum rating. They also demand a proper size heat sink and added together a solid state/relay and heat sink is quite a bit larger than a standard Bosch/Tyco relay.
