MCCB 1250H Frame Electronic Trip, 800A-1250A, 65kA - 3 Pole & 4 Pole | Onesto KCM5

The Onesto KCM5 1250H Frame Electronic Trip MCCB uses an electronic trip unit instead of adjustable thermal-magnetic, giving a single wide current-adjustment range that spans from 800A to 1250A in one breaker — covering what would otherwise need both the 1000H and 1250H adjustable thermal frames. It is suitable for electricians, panel builders, contractors and maintenance teams who want one high-current breaker for large industrial or main incoming supply installations. Available in both 3 Pole and 4 Pole configurations.

• Application: Suitable for main incoming supply boards and large industrial plant protection
• Key specification: Electronic trip unit, adjustable across 800-1250A in a single breaker, 65kA Icu, 690V rated operating voltage
• Pole configuration: Available in 3 Pole or 4 Pole
• Build quality: SABS approved to IEC 60947-2 / SANS 556-1, 1250H frame

Key Features

• Electronic trip unit covers the full 800-1250A range in one breaker, replacing the need to choose between separate 1000H and 1250H adjustable thermal frames
• Moulded case construction for durability in panel and enclosure installations
• Rated for continuous operation at 690VAC, 50/60Hz
• Largest and widest-range breaker in the KCM5 range

Typical Applications

• Main incoming supply protection
• Large industrial plant and machinery protection
• Generator and genset protection circuits
• Installations where a single wide-range breaker is preferred over stocking multiple frame sizes

Technical Specifications

What's Included

• 1 x Onesto KCM5 1250H Frame Electronic Trip MCCB (as per selected pole configuration)

Please note: Enclosures and accessories are not included and are available separately.

Installation & Compatibility Notes

• Confirm the required number of poles before ordering.
• Confirm the breaker will be installed in a suitable enclosure rated for the 1250H frame size.
• Installation must be carried out by a suitably qualified electrician in accordance with local electrical regulations.
• Confirm incoming supply fault-level requirements before specifying, given the high current involved.

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 whether the adjustable thermal or electronic trip version is right for your installation, contact Zisabo with your application details and we will assist where possible.