These connectors come in 15A, 30A and 45A versions. The difference is the wire size for the pins.
The Anderson Powerpole series is used extensively for Amateur Radio 12v supplies.
15A Contacts | recommended for 20-16 gauge wire | ||
30A Contacts | recommended for 14-12 gauge wire | ||
45A Contacts | recommended for 10 gauge wire |
These connectors are recommended for 12V (nominal) use only. Those requiring high-current connectors for other voltages (such as 24V or 48V systems) are urged to source physically incompatible connectors such as the Anderson SB range, to avoid any chance of connecting wrong-voltage devices together.