Single-pole ON-OFF-ON two-position switch electro base KN3(C)-103, 10A 125V / 6A 250V AC

Single-pole ON-OFF-ON two-position switch electro base KN3(C)-103 is a compact panel-mount selector designed for simple electrical control. The mechanical two-position selector provides a centre off and two selectable on states, rated for switching small loads: 10 A at 125 V AC and 6 A at 250 V AC. The unit features screw terminals for secure wiring and a footprint suitable for DIY, appliance repair, and basic industrial control panels.

Advantages

The KN3(C)-103 combines a small footprint with clear mechanical action and a centre-off position that prevents accidental feed. Screw terminal connections offer straightforward installation and reliable contact retention for routine maintenance or field repairs. Ratings for both 125 V AC and 250 V AC cover common low-voltage control circuits and lighting loads within the specified amperage limits.

Suitable for

• Control circuits in small machines and equipment
• Switching lighting circuits within the rated current
• DIY electrical projects and appliance repairs
• Basic panel-mount installations and prototyping

When it may not be suitable

This switch is intended for low-power AC switching within its specified ratings. It is not designed for high-current mains loads, inductive motor starting currents, or applications requiring switching of safety-critical circuits where certified multi-pole disconnects or contactors are needed. For continuous heavy-duty switching or environments with significant vibration, consult a product rated for higher current and ruggedized mounting.

Key specifications

• Contact configuration: single-pole, two-position with centre off
• Rated current: 10 A at 125 V AC; 6 A at 250 V AC
• Actuation: mechanical selector with tactile detents
• Mounting: panel-mount design
• Terminals: screw-type wire connections
• Typical applications: low-voltage control and lighting switching

How to use

Mount the switch in a suitable panel cutout and secure it according to the panel thickness and retention method. Connect conductors to the screw terminals, ensuring correct wire stripping length and torque on the terminal screws for solid contact. Use the centre-off position to isolate the circuit between the two on states; move the lever to either on position to route power to the chosen output. Verify connections and perform a functional test with the intended load while observing the rated current and voltage limits.

What to consider before purchase

• Ensure the rated current and voltage match the intended circuit (10 A @ 125 V AC; 6 A @ 250 V AC)
• Confirm single-pole switching is sufficient for your application and safety requirements
• Check panel cutout dimensions and mounting compatibility
• Consider wire gauge and terminal screw size for reliable connections

Usage recommendations

Use the switch within its rated electrical limits, avoid switching highly inductive or motor loads without appropriate protection, and perform installation with power disconnected. For repeated or high-frequency switching, consider a device with higher mechanical endurance or a dedicated relay to extend service life.