MCCB 630S Frame, 500A-630A, 35kA - 3 Pole & 4 Pole | Onesto KCM1

The Onesto KCM1 630S Frame MCCB is a moulded case circuit breaker designed for mixed load protection in industrial and heavy commercial electrical installations. It is suitable for electricians, panel builders, contractors and maintenance teams who need reliable overcurrent and short-circuit protection on main distribution boards, motor control centres or heavy machinery feeders. Available in current ratings from 500A to 630A, in both 3 Pole and 4 Pole configurations, to match your circuit requirements.

• Application: Suitable for main distribution boards, motor control centres and heavy machinery feeder circuits
• Key specification: 35kA breaking capacity, 690V rated operating voltage
• Current range: 500A or 630A
• Pole configuration: Available in 3 Pole or 4 Pole
• Build quality: SABS approved to IEC 60947-2 / SANS 556-1, 630S frame

Key Features

• Moulded case construction for durability in panel and enclosure installations
• Mixed load rating suitable for a wide range of circuit types
• Rated for continuous operation at 690VAC, 50/60Hz, at 40°C ambient
• High breaking capacity suited to industrial fault-current levels
• Compatible with matching mechanical interlocks and accessories for the 630S frame range

Typical Applications

• Industrial main distribution boards
• Motor control centres
• Heavy machinery feeder protection
• Generator and genset protection circuits
• Large commercial building main protection

Technical Specifications

What's Included

• 1 x Onesto KCM1 630S Frame MCCB (as per selected current rating and pole configuration)

Please note: Enclosures, mechanical interlocks, extension connectors, shunt trips, auxiliary contacts, under-voltage trips and vari-depth handles are not included and are available separately.

Installation & Compatibility Notes

• Confirm the required current rating and number of poles before ordering.
• Confirm the breaker will be installed in a suitable enclosure rated for the 630S frame size.
• Installation must be carried out by a suitably qualified electrician in accordance with local electrical regulations.
• The 630A / 4 Pole variant is listed at 45kA breaking capacity in supplier pricing data, differing from the 35kA catalogue rating shown for other 630S variants. Please confirm the exact kA rating with Zisabo before specifying this variant for high fault-level applications.
• For remote tripping, auxiliary signalling or mechanical interlocking, order the matching accessory separately.

Warranty & Support

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

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.

Need help choosing? If you are unsure which current rating or pole configuration is correct for your board, contact Zisabo with your application details and we will assist where possible.