Original price was: £60.91.£45.89Current price is: £45.89.
The IMO UB10D3040A is a heavy-duty UL489 miniature circuit breaker (MCB) designed to provide reliable protection against overloads and short circuits in industrial and commercial electrical installations. Manufactured by IMO Precision Controls, this robust circuit breaker is engineered for machinery, control panels, OEM equipment and industrial power distribution where dependable branch circuit protection is essential.
Featuring a 3-pole configuration, a 40 A rated current and a D curve tripping characteristic, the UB10D3040A is ideally suited to circuits supplying motors, transformers, compressors and other inductive loads that generate high inrush currents during start-up. Its compact DIN rail mounting format enables quick installation inside industrial control panels and electrical distribution boards.
With a 10 kA short circuit breaking capacity, thermal-magnetic protection and compliance with UL489 requirements, the UB10D3040A delivers dependable fault protection in demanding industrial environments. Its durable construction and compact modular design help maximise equipment uptime while simplifying installation and maintenance.
Miniature circuit breakers automatically disconnect electrical circuits when overload or short circuit conditions occur, protecting cables, motors and connected equipment from electrical damage. The thermal-magnetic operating mechanism combines overload protection with rapid magnetic fault interruption to minimise downtime and improve electrical safety.
The IMO UB10D3040A is specifically designed for applications where equipment experiences high inrush currents during start-up. Its D curve characteristic helps prevent nuisance tripping while maintaining dependable protection against genuine electrical faults in industrial environments.
| Current | 3040 A |
|---|---|
| Phase | Three Phase |
| HS Code | 8536201090 |
| Country of Manufacture | India |
The UB10D3040A provides overload and short circuit protection for three-phase electrical circuits used in industrial machinery, automation systems and commercial electrical installations.
The IMO UB10D3040A has a rated current of 40 A.
D curve circuit breakers are designed for motors, transformers, compressors and other inductive equipment that draw higher starting currents during normal operation.
The breaker mounts directly onto a standard 35 mm DIN rail inside electrical distribution boards and industrial control panels.
The UB10D3040A provides a 10 kA short circuit breaking capacity, delivering reliable protection for demanding industrial applications.
IMO Precision Controls miniature circuit breakers are trusted by electrical engineers, panel builders and machine manufacturers for dependable circuit protection, robust construction and reliable long-term performance in industrial environments.{ "@context": "https://schema.org/", "@type": "Product", "name": "IMO UB10D3040A 10kA UL489 Miniature Circuit Breaker 3 Pole 40A D Curve", "sku": "UB10D3040A", "mpn": "UB10D3040A", "brand": { "@type": "Brand", "name": "IMO Precision Controls" }, "category": "Miniature Circuit Breakers", "description": "IMO UB10D3040A UL489 miniature circuit breaker featuring a 3 pole configuration, 40 A rated current, D curve tripping characteristic and 10 kA breaking capacity for industrial circuit protection.", "additionalProperty": [ { "@type": "PropertyValue", "name": "Rated current", "value": "40 A" }, { "@type": "PropertyValue", "name": "Number of poles", "value": "3 Pole" }, { "@type": "PropertyValue", "name": "Trip characteristic", "value": "D Curve" }, { "@type": "PropertyValue", "name": "Breaking capacity", "value": "10 kA" }, { "@type": "PropertyValue", "name": "Mounting type", "value": "DIN Rail" } ] } { "@context": "https://schema.org", "@type": "FAQPage", "inLanguage": "en-GB", "mainEntity": [ { "@type": "Question", "name": "What is the IMO UB10D3040A used for?", "acceptedAnswer": { "@type": "Answer", "text": "The UB10D3040A provides overload and short circuit protection for three-phase electrical circuits used in industrial machinery, automation systems and commercial electrical installations." } }, { "@type": "Question", "name": "What is the rated current of this circuit breaker?", "acceptedAnswer": { "@type": "Answer", "text": "The IMO UB10D3040A has a rated current of 40 A." } }, { "@type": "Question", "name": "Why does this breaker use a D curve characteristic?", "acceptedAnswer": { "@type": "Answer", "text": "D curve circuit breakers are designed for motors, transformers, compressors and other inductive equipment that draw higher starting currents during normal operation." } }, { "@type": "Question", "name": "How is the UB10D3040A installed?", "acceptedAnswer": { "@type": "Answer", "text": "The breaker mounts directly onto a standard 35 mm DIN rail inside electrical distribution boards and industrial control panels." } }, { "@type": "Question", "name": "What is the breaking capacity?", "acceptedAnswer": { "@type": "Answer", "text": "The UB10D3040A provides a 10 kA short circuit breaking capacity, delivering reliable protection for demanding industrial applications." } } ] }
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...