Why Choose the IMO UB10D300.5A Miniature Circuit Breaker?
The IMO UB10D300.5A is a compact 3-pole miniature circuit breaker (MCB) designed to protect three-phase electrical circuits against overloads and short circuits. Part of the IMO UB10 circuit protection range, it is suitable for industrial control systems, machinery, OEM equipment and other applications requiring reliable low-current circuit protection.
Featuring a D curve tripping characteristic, the UB10D300.5A is designed to tolerate short-duration inrush currents from inductive devices while maintaining dependable protection during genuine fault conditions. This makes it suitable for control transformers, solenoids, contactor coils and other equipment that may draw a temporary surge when energised.
With a rated current of 0.5 A, a 3-pole configuration and a 10 kA breaking capacity, the UB10D300.5A provides simultaneous protection and isolation across three conductors. Its compact DIN rail-mounted construction supports straightforward installation within distribution boards, switchboards and industrial control panels.
Key Advantages
- Dependable overload and short-circuit protection.
- 0.5 A rated current for sensitive low-current circuits.
- D curve tripping characteristic suitable for inductive loads with temporary inrush currents.
- 3-pole configuration for simultaneous three-phase protection and isolation.
- 10 kA breaking capacity for reliable fault-current interruption.
- Compact DIN rail-mounted design simplifies panel installation.
Key Features
- IMO UB10 series miniature circuit breaker.
- 0.5 A rated operational current.
- D curve instantaneous trip characteristic.
- Three-pole switching configuration.
- 10 kA short-circuit breaking capacity.
- Thermal protection against sustained overload currents.
- Magnetic protection against short-circuit faults.
- Compact construction for standard 35 mm DIN rail installation.
Reliable Protection for Low-Current Three-Phase Circuits
Miniature circuit breakers automatically disconnect electrical circuits when excessive current is detected, helping protect conductors, components and connected equipment from damage. Thermal protection responds to prolonged overload conditions, while magnetic protection provides rapid disconnection during short-circuit faults.
The D curve characteristic of the IMO UB10D300.5A allows higher temporary inrush currents than B curve or C curve breakers. This is beneficial for low-current inductive equipment such as control transformers, solenoids and electromagnetic devices that may otherwise cause nuisance tripping during start-up.
Typical Applications
- Three-phase industrial control circuits.
- Control transformers and auxiliary power circuits.
- Solenoids, contactor coils and electromagnetic devices.
- Industrial machinery and automation systems.
- OEM control panels and electrical enclosures.
- Commercial and industrial distribution boards.
