Sell Hella Relay 24V ( 5 Pin ) 20A best price
5
6
ratings
15
sold
MYR 10
Brand | Hella |
---|---|
Ships from | Kuala Lumpur |
Product Description
Functional principle
Relays are basically electrically operated switches which use an electromagnet to move a switching mechanism by
switching one or more contacts. They are used where one or more load circuits need to be switched on or off by
means of a control signal. Characteristic of the electromechanical relay is the complete (galvanic) isolation
between the control and controlled circuits.
Make relays
Make relays are used to close an electric circuit between a power source and one or more electrical loads, i.e. the
loads are switched on. Relays are operated by means of switches, pulse generators or control devices. Typical
vehicle applications are headlights, auxiliary lights and fog lights, horns, heaters, air conditioner systems, etc.
Change-over relays
Change-over relays switch the load circuit over from one electrical load to another. These relays can be operated
by a dashboard switch, for example. Change-over relays are used for switch applications with two stages/speeds
such as heated rear windows or fan motors etc.
How change-over relays work
A change-over relay operates on the same principle as a make relay. The only difference is that the armature is
connected to a second (alternative) output (87a) when released. As soon as the control circuit is active, the
armature is pulled in, opens the break contact (87a) and switches over to the make contact (87). A change-over
relay can be used as either a make or a break relay. By design, the switching current of the make contact is always
higher than that of the break contact.
Rated voltage
12 V: for passenger cars, agricultural and construction machinery etc.
24 V: for commercial vehicles, buses, municipal vehicles etc.