Why Choose the IMO UB10D1040A Miniature Circuit Breaker?
The IMO UB10D1040A is a high-performance UL 489 miniature circuit breaker (MCB) designed to protect industrial electrical installations against overloads and short circuits. Manufactured by IMO Precision Controls, this single-pole circuit breaker provides dependable thermo-magnetic overcurrent protection for machinery, automation systems, distribution equipment and electrical control panels.
As part of the established IMO UB10 miniature circuit breaker series, the UB10D1040A features a D curve tripping characteristic. Its instantaneous operating range of approximately 10 to 20 times the rated current makes it particularly suitable for circuits containing motors, transformers, solenoids and other equipment with high starting or inrush currents.
With a rated operational current of 40 A, a single-pole configuration and a 10 kA short-circuit breaking capacity, the UB10D1040A delivers reliable branch circuit protection for demanding industrial applications. Its compact DIN rail mounting format enables efficient installation within machinery cabinets, control panels and electrical distribution enclosures.
Key Advantages
- Industrial UL 489 miniature circuit breaker.
- 40 A rated operational current for branch circuit protection.
- D curve tripping characteristic for high inrush current loads.
- 10 kA short-circuit breaking capacity.
- Thermo-magnetic protection against overloads and short circuits.
- Compact DIN rail format simplifies electrical panel installation.
Key Features
- IMO UB10 miniature circuit breaker series.
- 40 A rated operational current.
- Single-pole configuration.
- D curve operating characteristic.
- 10 kA rated breaking capacity.
- Compliant with UL 489, IEC 60947-2 and IEC 60898-1.
- Contact-position indicator for convenient status identification.
- DIN rail mounting in accordance with EN 60715.
Reliable Protection for Industrial Electrical Systems
Miniature circuit breakers automatically disconnect an electrical circuit when an overload or short circuit is detected. Thermo-magnetic operation combines thermal protection against sustained excess current with rapid magnetic tripping during severe fault conditions, helping to protect wiring, machinery and connected electrical equipment.
The D curve characteristic of the IMO UB10D1040A accommodates temporary current surges generated when motors, transformers and other inductive loads are energised. This helps reduce nuisance tripping during normal equipment start-up while maintaining dependable protection against genuine electrical faults.
Typical Applications
- Industrial control panels and electrical cabinets.
- Electric motor and machinery circuits.
- Transformers, solenoids and inductive loads.
- OEM automation equipment.
- Manufacturing and production machinery.
- Industrial branch circuit protection.
