Original price was: £20.34.£15.32Current price is: £15.32.
The IMO UB10D1003A is a compact UL 489 miniature circuit breaker (MCB) designed to protect industrial control circuits, machinery and electrical installations against overloads and short circuits. Part of the established IMO UB10 series, this single-pole circuit breaker provides dependable branch circuit protection for low-current electrical applications.
Featuring a D curve tripping characteristic, the UB10D1003A is suitable for circuits supplying transformers, power supplies, solenoids, contactors and other inductive equipment with high temporary inrush currents. Its thermo-magnetic operating mechanism provides reliable fault disconnection while helping to prevent nuisance tripping during normal equipment energisation.
With a 3 A rated current, a single-pole configuration and a 10 kA short-circuit breaking capacity, the IMO UB10D1003A is ideal for protecting control and auxiliary circuits. Its DIN rail mounted construction supports straightforward installation inside industrial control panels, electrical enclosures and machinery cabinets.
Miniature circuit breakers automatically disconnect a circuit when an overload or short circuit occurs, helping to protect conductors, machinery and connected components from electrical damage. This supports safer operation, reduces the possibility of prolonged equipment faults and simplifies circuit restoration after the cause of a trip has been corrected.
The D curve response of the IMO UB10D1003A permits temporary current peaks of approximately 10 to 20 times its rated current before instantaneous magnetic tripping. This makes it particularly suitable for correctly designed circuits containing equipment with substantial start-up or energisation currents.
| Current | 1003 A |
|---|---|
| Phase | Single Phase |
| HS Code | 8536201090 |
| Country of Manufacture | India |
It is used to protect 3 A industrial control, auxiliary and equipment circuits against overloads and short circuits.
The IMO UB10D1003A has a rated operational current of 3 A.
The D curve instantaneous trip range is approximately 10 to 20 times the breaker's rated current, making it suitable for correctly designed circuits with high temporary inrush currents.
The UB10D1003A has a rated short-circuit breaking capacity of 10 kA.
Its rated operational voltages include 277 V AC under UL, 230 V AC under IEC and 48 V DC for a single-pole installation.
It is designed for mounting on a standard DIN rail inside an appropriate electrical control panel or enclosure.
IMO circuit protection products provide electrical engineers, automation specialists and OEM machine builders with dependable solutions for protecting industrial control circuits, machinery and electrical installations.{ "@context": "https://schema.org/", "@type": "Product", "name": "IMO UB10D1003A 3A 1 Pole D Curve Miniature Circuit Breaker", "sku": "UB10D1003A", "mpn": "UB10D1003A", "brand": { "@type": "Brand", "name": "IMO" }, "manufacturer": { "@type": "Organization", "name": "IMO Precision Controls" }, "category": "Miniature Circuit Breakers", "description": "IMO UB10D1003A UL 489 miniature circuit breaker with a 3 A rated current, single-pole configuration, D curve tripping characteristic and 10 kA short-circuit breaking capacity.", "additionalProperty": [ { "@type": "PropertyValue", "name": "Rated operational current", "value": "3 A" }, { "@type": "PropertyValue", "name": "Number of poles", "value": "1" }, { "@type": "PropertyValue", "name": "Tripping curve", "value": "D curve, 10–20 × rated current" }, { "@type": "PropertyValue", "name": "Short-circuit breaking capacity", "value": "10 kA" }, { "@type": "PropertyValue", "name": "UL AC rated voltage", "value": "277 V AC" }, { "@type": "PropertyValue", "name": "IEC AC rated voltage", "value": "230 V AC" }, { "@type": "PropertyValue", "name": "DC rated voltage", "value": "48 V DC" }, { "@type": "PropertyValue", "name": "Mounting type", "value": "DIN rail" }, { "@type": "PropertyValue", "name": "Standards", "value": "UL 489, IEC 60947-2 and IEC 60898-1" } ] } { "@context": "https://schema.org", "@type": "FAQPage", "inLanguage": "en-GB", "mainEntity": [ { "@type": "Question", "name": "What is the IMO UB10D1003A used for?", "acceptedAnswer": { "@type": "Answer", "text": "It is used to protect 3 A industrial control, auxiliary and equipment circuits against overloads and short circuits." } }, { "@type": "Question", "name": "What is the current rating of the UB10D1003A?", "acceptedAnswer": { "@type": "Answer", "text": "The IMO UB10D1003A has a rated operational current of 3 A." } }, { "@type": "Question", "name": "What does the D curve characteristic mean?", "acceptedAnswer": { "@type": "Answer", "text": "The D curve instantaneous trip range is approximately 10 to 20 times the breaker's rated current, making it suitable for correctly designed circuits with high temporary inrush currents." } }, { "@type": "Question", "name": "What is the short-circuit breaking capacity?", "acceptedAnswer": { "@type": "Answer", "text": "The UB10D1003A has a rated short-circuit breaking capacity of 10 kA." } }, { "@type": "Question", "name": "Which voltage ratings does this circuit breaker support?", "acceptedAnswer": { "@type": "Answer", "text": "Its rated operational voltages include 277 V AC under UL, 230 V AC under IEC and 48 V DC for a single-pole installation." } }, { "@type": "Question", "name": "How is the IMO UB10D1003A installed?", "acceptedAnswer": { "@type": "Answer", "text": "It is designed for mounting on a standard DIN rail inside an appropriate electrical control panel or enclosure." } } ] }
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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...