Murrelektronik Miniature Circuit Breakers (MCB)
Murrelektronik Circuit Breakers for Industrial Control
When you build automation panels for real plants, you learn quickly that not all breakers behave the same. Some trip too early, others weld shut after a few cycles. Murrelektronik circuit breakers stand out because they’re designed specifically for industrial control — compact, DIN-rail mounted, rated for both AC and DC, and built to survive vibration and thermal stress that would kill standard devices.
The range covers single- and multi-pole breakers from 0.5 A to 32 A with breaking capacities up to 10 kA. You’ll see both thermal-magnetic versions for classic 230/400 V AC systems and electronic models for 24 V DC control circuits. All conform to EN 60947-2 and UL 1077, meaning you can use them anywhere from European machinery lines to exported OEM panels.
Murrelektronik Overcurrent Protection for 24 V DC Circuits
For DC systems, Murrelektronik’s electronic breakers — better known as MICO modules — changed the game. Instead of knocking out an entire feed when one channel overloads, MICO isolates only that branch. Each channel is adjustable, typically 1–10 A, with visual and remote indicators so maintenance teams know exactly where the fault sits. Once the overload clears, it resets automatically.
That’s the sort of engineering that keeps production running. No melted fuses, no full-system reboot after a single sensor short. MICO Pro and Classic models link directly to Murrelektronik power supplies with plug-in bus connectors, which keeps wiring short and documentation simple.
Thermal-Magnetic Breakers for Main Power Distribution
Mechanical breakers still have their place, especially for incoming supply and motor protection. Murrelektronik thermal-magnetic breakers come in standard B, C and D trip curves, covering everything from light control loads to motor-start peaks. The terminals accept 2.5 – 6 mm² conductors, screw torque holds even after years of service, and the toggles remain firm — no wobble, no accidental half-positions.
In mixed-voltage cabinets you often see both types side by side: electronic MICO units on the 24 V rails, thermal breakers on the mains. Same footprint, same rail, unified labeling. That’s how professional panel wiring should look.
Installation Notes from the Field
Mounting is the usual 35 mm DIN profile. Clearance between units is minimal, so you can stack multiple poles tight without overheating. Each module includes a clear trip indicator and optional auxiliary contact for remote feedback. Typical ambient range: –25 °C to +60 °C. Breakers meet CE, UL, CSA and EAC markings for global supply.
A detail that technicians mention: Murrelektronik’s screws are captive — you can’t drop them inside the panel when tightening. Small touch, big relief on a night shift.
Why Engineers Keep Choosing Murrelektronik
Every shop has that one brand they trust for protection gear. For many, this is it. The breakers behave predictably; the tolerances don’t drift with age. You don’t get nuisance trips on inductive loads or random failures under heat. And if a unit ever needs replacing, the catalog number still exists five years later — no discontinued surprises.
Reliable circuit protection isn’t glamorous, but it’s what keeps automation alive. Murrelektronik’s breakers deliver that kind of quiet reliability day after day.
Wholesale Supply via Bank of Lamps
Bank of Lamps supplies the complete Murrelektronik breaker lineup across Europe — from classic thermal-magnetic models to MICO electronic modules for 24 V DC systems. All products are stocked in our Latvian warehouse with full EAN/MPN traceability for integrators and OEMs.
Why Choose Bank of Lamps
- Individual B2B pricing matched to your project scale
- Dedicated account manager familiar with protection devices
- Real-time stock visibility across our and partner warehouses
- Rapid quotation turnaround (usually within one hour)
- Ordering by EAN/MPN list for accuracy and speed
- Regularly updated downloadable price lists
- Transparent lead-time tracking from factory to dispatch
- Access to complete purchase history for repeat orders