Miniature Circuit Breaker 1A-100A, 3kA & 6kA, 1-4 Pole | Onesto KC3E & KC6 DIN Rail MCB

The Onesto KC3E and KC6 miniature circuit breakers (MCBs) protect final circuits and distribution boards against overload and short circuit. They are suitable for electricians, panel builders and maintenance teams working on domestic, commercial and light industrial installations, and are available from 1A to 100A in single, double, triple and four pole versions.

• Application: Overload and short-circuit protection on DIN rail distribution boards
• Breaking capacity: 3kA (KC3E) and 6kA (KC6 / KC6-KU), plus a 4.5kA single pole option
• Current range: 1A to 63A, with 80A and 100A in the KC6-125 frame
• Poles: 1, 2, 3 and 4 pole versions
• Standards: Rated 240/415V, 50/60Hz, SABS IEC 60947-2 and VC8036 (per MCE)

Key Features

• Two breaking capacity options, so you can match the breaker to the fault level at the board
• Full current range from 1A to 100A in one listing, so lighting, plug, geyser and sub-board circuits can be sourced together
• Single to four pole versions for single-phase and three-phase boards
• Standard DIN rail mounting, compatible with Onesto and MCE distribution boards
• Accessories such as auxiliary contacts and shunt trips are available separately for the Onesto range

Typical Applications

• Domestic distribution boards
• Lighting, plug and appliance circuit protection
• Sub-board and ready-board protection
• Commercial and light industrial installations
• Panel building and board upgrades

Technical Specifications

What’s Included

• 1 x Onesto miniature circuit breaker in the breaking capacity, current rating and pole configuration selected

Please note: Installation fittings, electrical protection, cartridges, control boxes, cables, unions, brackets, or accessories are not included unless specifically listed above.

Installation & Compatibility Notes

• Select the breaker rating to suit the cable size and the load it protects. The breaker must never be rated higher than the cable can carry.
• Confirm the breaking capacity (3kA or 6kA) is suitable for the prospective fault level at your board.
• Check the pole count against your supply: single pole for single-phase circuits, three or four pole for three-phase boards.
• Confirm your board accepts standard DIN rail breakers before ordering.
• Installation should be carried out by a suitably qualified person, with a Certificate of Compliance issued where required.

Warranty & Support

Zisabo supplies quality plumbing, pump, filtration and electrical products with practical support to help customers choose the correct item for their application. If you are unsure whether this product is suitable, contact us before ordering and our team will assist where possible.

This product is supplied with the applicable manufacturer or supplier warranty, subject to correct installation, correct application, and warranty terms.

Need help choosing? If you are unsure whether this product is suitable for your system, contact Zisabo with your application details, required current rating, number of poles and the fault level at your board, and we will assist where possible.