Product Overview
The Onesto KCD6 6A single-pole DC miniature circuit breaker provides overload and short-circuit protection for correctly specified direct-current circuits. Its DIN-rail format suits compatible distribution boards and control panels, with a 6kA breaking capacity and a maximum operating voltage of 250V DC.
Key Features
- 6A rated current for circuits designed around this protection rating.
- Single-pole, single-break operation interrupts one conductor of the DC circuit.
- 6kA short-circuit breaking capacity for installations with a suitable prospective fault current.
- DIN-rail mounting for installation in compatible electrical enclosures.
- Designed to protect and control DC circuits against overloads and short circuits.
Applications
- DC distribution boards and control panels requiring 6A single-pole protection.
- Domestic and industrial DC electrical installations within the specified ratings.
- Solar-related DC circuits where the system voltage, fault level, conductor size and switching arrangement meet the installation design.
Why Choose This Product?
This breaker offers a compact Onesto protection option for installers who require 6A single-pole DC circuit protection. It forms part of the KCD6 range, allowing the current rating to be selected to suit the circuit while retaining a consistent DIN-rail installation format.
Important Notes
- Installation and device selection must be completed by a qualified electrician in accordance with applicable South African wiring requirements and the manufacturer's instructions.
- A single-pole breaker interrupts only one conductor. It does not disconnect both positive and negative conductors together.
- The local catalogue lists 125/250V DC. The manufacturer's KCD6 single-pole operating rating is 250V DC maximum. The 1000V insulation rating is not permission to operate this single-pole breaker on a 1000V DC circuit.
- Observe the device's polarity, supply/load markings and wiring diagram. Select the trip characteristic to suit the load and verify it against the supplied unit's marking before installation.
- Do not substitute an AC-only breaker for this DC protection application.
- Product images illustrate the range; the current rating printed on the supplied unit will match the ordered version.
Technical Specifications
| Specification | Detail |
|---|---|
| Brand | Onesto |
| Model Range | KCD6 |
| Supplier Product Code | GL1CDC1006 |
| Product Type | DC miniature circuit breaker (MCB) |
| Rated Current | 6A |
| Poles | 1P / single pole |
| Breaks | 1 / single break |
| Voltage Rating | 125/250V DC (local catalogue); 250V DC maximum operating voltage for 1P |
| Short-Circuit Breaking Capacity | 6kA |
| Rated Insulation Voltage | 1000V |
| Rated Impulse Withstand Voltage | 6kV |
| Mounting | DIN rail |
| Standard | IEC 60947-2 |
Important:
All solar products, power systems, water heating and gas products and their components must be installed by appropriately qualified personnel. All installations must adhere to local wiring regulations and standards. Sustainable Online will not be held liable for any product malfunctions as a result of incorrectly installed systems.

