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US10D1040A IMO 10kA UL1077 MCB 1 pole 40A D Curve
£8.43
Why Choose the IMO US10D1040A Miniature Circuit Breaker?
The IMO US10D1040A is a compact UL1077 supplementary miniature circuit breaker (MCB) engineered to provide dependable overload and short-circuit protection for industrial control panels, OEM machinery and factory automation systems. Manufactured by IMO Precision Controls, this single-pole breaker combines reliable thermo-magnetic protection with a compact DIN rail mounted design for demanding industrial applications.
Designed for machine builders, panel manufacturers and automation engineers, the US10D1040A integrates seamlessly alongside PLCs, relays, contactors, power supplies and other industrial control components. Its slim modular construction maximises enclosure space while delivering dependable supplementary circuit protection.
Featuring a 40 A rated current, a D Curve tripping characteristic and a 10 kA short-circuit breaking capacity, the IMO US10D1040A is particularly suited to transformers, industrial power supplies, solenoids, contactor coils and other inductive loads that generate high inrush currents during start-up.
Key Advantages
- Compact UL1077 supplementary miniature circuit breaker.
- 40 A rated current for industrial control applications.
- D Curve characteristic for inductive loads with high inrush currents.
- 10 kA short-circuit breaking capacity.
- Single-pole construction saves valuable DIN rail space.
- Quick DIN rail installation and simple maintenance.
Key Features
- IMO Precision Controls US10D Series.
- Single-pole configuration.
- 40 A rated operational current.
- D Curve magnetic tripping characteristic.
- 10 kA interrupting capacity.
- UL1077 supplementary protector.
- Thermo-magnetic overload and short-circuit protection.
- Contact position indicator.
- Compact EN 60715 DIN rail mounted construction.
Reliable Protection for Industrial Automation
The IMO US10D1040A automatically disconnects the protected circuit during overload or short-circuit conditions, helping to protect conductors, electrical equipment and machinery from damage whilst reducing costly downtime. Its dependable thermo-magnetic mechanism provides reliable operation throughout demanding industrial environments.
Its D Curve operating characteristic is specifically intended for applications with high instantaneous starting currents. This makes it an excellent choice for transformer-fed circuits, industrial power supplies, contactor coils, solenoids and similar inductive equipment where nuisance tripping must be minimised.
Typical Applications
- Industrial control panels.
- OEM machinery.
- Factory automation systems.
- Transformer protection.
- Industrial power supplies.
- Contactor and relay circuits.
- PLC control systems.
- Process control and material handling equipment.
Technical Specifications
Tick the specs you need, then view products that match.
| Certification | UL 1077 | |
|---|---|---|
| Current | 40 A | |
| Phase | Single Phase | |
| Poles | 1-pole | |
| Device Type | MCB | |
| Trip Curve | D curve | |
| Breaking Capacity | 10 kA | |
| Manufacturer | IMO Precision Controls | |
| Series | US10D | |
| Model | US10D1040A | |
| Product type | Supplementary miniature circuit breaker | |
| Rated current | 40 A | |
| Number of poles | 1 | |
| Trip characteristic | D Curve (10–20 × In) | |
| Breaking capacity | 10 kA | |
| Standards | UL1077, IEC 60947-2 & IEC 60898-1 | |
| UL rated operational voltage | 277 V AC | |
| IEC rated operational voltage | 230 V AC | |
| DC rated operational voltage | 48 V DC | |
| Frequency | 50 / 60 Hz | |
| Protection rating | IP20 / NEMA 1 | |
| Mounting | EN 60715 DIN rail | |
| Operating temperature | -25°C to +55°C | |
| Mechanical life | 20,000 operations | |
| Electrical life | 6,000 operations | |
| Terminal tightening torque | 2.5 Nm | |
| Wire capacity | AWG 18–3 (0.82–26.7 mm²) | |
| Approximate weight | 0.125 kg | |
| Manufacturer part number | US10D1040A | |
| Barcode | 5056207491511 | |
| HS Code | 8536201090 | |
| Country of Manufacture | India |
Frequently Asked Questions
What is the IMO US10D1040A used for?
It provides supplementary overload and short-circuit protection for industrial control systems, OEM machinery and factory automation equipment.
What is the rated current?
The IMO US10D1040A has a rated current of 40 A.
Why choose a D Curve circuit breaker?
D Curve breakers are designed for inductive loads with high inrush currents, including transformers, solenoids, industrial power supplies and contactor coils.
What is the interrupting capacity?
The US10D1040A provides a 10 kA short-circuit breaking capacity.
Is this a UL489 branch circuit breaker?
No. The US10D1040A is a UL1077 supplementary protector intended for supplementary protection within industrial equipment and control systems.
How is the breaker installed?
The breaker clips directly onto a standard EN 60715 DIN rail inside industrial control panels and electrical enclosures.
Trusted by Industrial Professionals
IMO Precision Controls supplementary circuit breakers are trusted worldwide by panel builders, machine manufacturers and automation engineers for compact, dependable protection of industrial electrical control systems.
