Miniature circuit breaker (MCB), single-pole to three-pole, for DIN rail, B/C/D curves, for industrial distribution and control panels.
Tell us the reference or key specification (current, power, gauge, size), quantity and city — a technical advisor sends your quote the same business day.
The DIN-rail miniature circuit breaker (MCB) protects distribution circuits per IEC 60898-1, with standard ratings of 6 to 63 A and breaking capacities of 6 to 10 kA. Trip curve B, C or D defines at how many times rated current the instantaneous magnetic trip operates.
The industrial DIN rail circuit breaker is a modular thermal-magnetic circuit breaker used to protect branch circuits in control, distribution, automation, lighting, technical outlet and auxiliary-load panels. It mounts on DIN rail and allows circuits to be organized by poles, trip curve and function inside the panel. Its difference compared with a molded case circuit breaker is scope: the modular MCB is used on smaller-section circuits and internal distribution, while the MCCB is used as main or feeder protection. It also does not perform the same function as an SPD, because it protects against overcurrent and short circuit, not transient overvoltages. To select it, circuit current, voltage, number of poles, trip curve, required breaking capacity, load type and coordination with main protections are reviewed. TECTUL quotes it for new industrial panels, expansions, module replacement and electrical maintenance.
We dispatch to Bogotá, Medellín, Cali, Barranquilla and all of Colombia. Request a quote via WhatsApp for your DIN rail circuit breaker indicating poles, curve, current, voltage, circuit use and required quantity.
| Curve | Magnetic trip | Typical use |
|---|---|---|
| B | 3 – 5 × In | Resistive loads and long runs with low fault current |
| C | 5 – 10 × In | General loads, discharge lighting, small motors |
| D | 10 – 20 × In | High-inrush loads: transformers, motor groups |
Trip thresholds per IEC 60898-1, with preferred ratings of 6, 10, 16, 20, 25, 32, 40, 50 and 63 A and typical breaking capacity Icn of 6 or 10 kA. Industrial panels mount them on 35 mm DIN rail.
The price is quoted via WhatsApp according to poles, current, trip curve, breaking capacity, quantity and industrial line availability.
The DIN rail breaker opens on overload or short circuit. The SPD diverts transient overvoltages to ground/earth and does not replace thermal-magnetic protection.
It depends on the load type and starting behavior. For motors, transformers or electronic loads, the curve must be validated with the panel design.
Yes, it is widely used in modular control and distribution panels, as long as current, breaking capacity and number of poles match the circuit.
It snaps onto the rail, is wired with suitable terminals, terminals are tightened to the corresponding torque and the circuit is labeled before energizing.
Not without reviewing the conductor, load and protection coordination. Increasing amperage can leave the circuit without proper protection.
Curve C (5–10 times rated) for mixed loads, and curve D (10–20 times) when the connection inrush of transformers or motor groups nuisance-trips a C curve.
It is the Icn breaking capacity per IEC 60898-1: the maximum short-circuit current the breaker can interrupt. It must exceed the fault current available at the panel.
Updated: July 22, 2026
