| Subject | English | Spanish |
| comp., MS | AC/Main switch | interruptor de alimentación de CA (The overall power control for a piece of equipment, such as a device, a computer, or Surface unit) |
| el. | battery main switch | interruptor de batería |
| mech.eng. | main switch | interruptor principal |
| el. | main switching contacts | contactos principales de corte |
| mech.eng. | main switching unit | interruptor principal |