Air circuit breaker

Begin with the rated current (In) needed by the circuit, choosing from values like 6A, 10A, 16A, 20A, 25A, or 40A depending on load. Decide how many protected poles you need (1P, 2P, or 3P), and check the breaking capacity (Icn) to ensure it can interrupt a fault current safely—examples in this range go up to 4500 A or 10000 A. Finally, confirm the mounting style (DIN rail 35 mm) and voltage rating (230 V or similar) for proper installation.

The curve code (for example, C Curve or similar) indicates how quickly the breaker reacts to overcurrent. A C Curve tripping characteristic is suited for circuits with moderate inductive loads, offering a balanced response to surges. This matters because selecting the appropriate curve code helps protect wiring and devices from short circuits while avoiding nuisance trips during normal operation, ensuring reliable protection for home or commercial electrical systems.

Residential and small commercial setups typically use breakers with breaking capacities in the 6000 A range, while larger or more demanding circuits may require up to 10000 A or higher. In the presented options, you’ll see ratings such as 4500 A for some 2P units and 6000–10000 A across several 3P or higher‑pole models, reflecting different levels of fault current protection suitable for varied installations.

Look for DIN rail mounting compatibility (35 mm) and a clamping capacity of up to 25 mm² for wire connections. Check the number of poles and the enclosure’s temperature rating to ensure it fits your panel. Many units come with a plastic housing and specific torque specifications for secure terminal connections, which helps with durable, compliant installation in and around control panels.

The collection includes models from well‑known makers offering miniature circuit breakers for home, office, and light industrial use. Expect 1P, 2P, and 3P variants with various current ratings and curves such as C Curve, designed for DIN rail mounting and standard 230 V operation. This mix provides options for upgrading an existing panel or configuring a new one with reliable protection aligned to EN/IEC 60898‑1 standards.

Do not oversize the rated current beyond what your circuit requires, as this can reduce protection effectiveness and risk overheating wires. Instead, select a breaker that matches your load and provides headroom for anticipated growth, while ensuring the device can safely interrupt fault currents with the expected breaking capacity. If in doubt, consult a qualified electrician to assess your specific wiring and protection needs.