A micro relay is a smaller version of the more popular standard relay and are used when space is at a premium.
Note, a standard relay is also sometimes referred to as a 'Mini Relay'.
Micro relays are more compact than the standard size and are an ideal choice when you need to save space - for example in an ATM fuse box set up with mini fuses.
They have a smaller rectangular shape compared to the square cubed shape of the standard relay.
Micro automotive relays use a different terminal number identification system compared to standard mini relays.
See the list below for micro relay terminal numbering:
1: (4.8mm) Coil
2: (4.8mm) Coil
3: (6.3mm) Common Connection to Terminals
4: (4.8mm) Normally Closed (NC)
5: (6.3mm) Normally Open (NO)