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US10C300.5A IMO 10kA UL1077 MCB 3 pole 0.5A C Curve
£25.20
Why Choose the IMO US10C300.5A UL1077 Miniature Circuit Breaker?
The IMO US10C300.5A is a compact UL1077 supplementary miniature circuit breaker designed to protect sensitive industrial control circuits against overload and short-circuit conditions. Manufactured by IMO Precision Controls, this three-pole protective device is suitable for control panels, OEM machinery and automation equipment requiring dependable low-current circuit protection.
Featuring a C curve tripping characteristic, the US10C300.5A can accommodate moderate start-up and inrush currents while providing effective thermal-magnetic protection. This makes it well suited to sensitive three-phase control circuits, instrumentation, small transformers, control power supplies and other low-current industrial loads.
With a 0.5 A rated current, 3-pole configuration and 10 kA short-circuit breaking capacity, the IMO US10C300.5A provides simultaneous protection and isolation across three conductors. Its modular DIN rail-mounted construction enables straightforward installation within machinery enclosures and industrial electrical cabinets.
Key Advantages
- Compact UL1077 supplementary circuit protector.
- 0.5 A rated current for sensitive low-current circuits.
- 3-pole configuration for simultaneous three-phase protection and isolation.
- C curve tripping characteristic suitable for moderate inrush currents.
- 10 kA short-circuit breaking capacity.
- Quick and convenient DIN rail installation.
Key Features
- IMO Precision Controls US10 Series.
- Compliant with UL1077, IEC 60947-2 and IEC 60898-1.
- 0.5 A rated operational current.
- 3-pole construction.
- C curve operating characteristic.
- 10 kA rated breaking capacity.
- Thermal-magnetic overcurrent protection.
- Contact position indicator.
- DIN rail mountable and RoHS compliant.
Sensitive Three-Pole Circuit Protection
The IMO US10C300.5A automatically disconnects the protected circuit when excessive current is detected. Its thermal element responds to sustained overload conditions, while the magnetic trip mechanism rapidly interrupts higher-current short circuits. This dual-action protection helps reduce the risk of damage to sensitive control equipment, wiring and connected electrical components.
As a UL1077 supplementary protector, the US10C300.5A is designed for installation within equipment where appropriate branch-circuit protection is already provided. Its low 0.5 A rating makes it particularly suitable for auxiliary circuits, instrumentation and sensitive control applications requiring three-pole disconnection.
Typical Applications
- Industrial control panels.
- Three-phase control and monitoring circuits.
- Instrumentation and measurement equipment.
- Small transformer protection.
- Control power supplies.
- OEM machinery and automation systems.
- Process control and auxiliary circuits.
Technical Specifications
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| Certification | UL 1077 | |
|---|---|---|
| Current | 0.5 A | |
| Phase | Three Phase | |
| Poles | 3-pole | |
| Device Type | MCB | |
| Trip Curve | C curve | |
| Breaking Capacity | 10 kA | |
| Manufacturer | IMO Precision Controls | |
| Series | US10 | |
| Model | US10C300.5A | |
| Product type | Supplementary miniature circuit breaker | |
| Rated current | 0.5 A | |
| Number of poles | 3 | |
| Trip characteristic | C Curve, 5–10 × rated current | |
| Short-circuit breaking capacity | 10 kA | |
| UL rated operational voltage | Up to 480Y/277 V AC | |
| IEC rated operational voltage | Up to 415 V AC | |
| Rated frequency | 50 / 60 Hz | |
| Calibration temperature | 40°C | |
| Operating mechanism | Thermal-magnetic | |
| Mechanical lifetime | 20,000 operations | |
| Electrical lifetime | 6,000 operations | |
| Operating temperature | -25°C to +55°C | |
| Fastening torque | 2.5 Nm | |
| Wire range | AWG 18–3 / 0.82–26.7 mm² | |
| Mounting | DIN rail EN 60715 | |
| Protection degree | NEMA 1 / IP20 | |
| Pollution degree | 3 | |
| Approximate weight | 0.37 kg | |
| Standards | UL1077, IEC 60947-2 and IEC 60898-1 | |
| HS Code | 8536201090 | |
| Country of Manufacture | India |
Frequently Asked Questions
What is the IMO US10C300.5A used for?
The US10C300.5A provides supplementary overload and short-circuit protection for sensitive three-pole control circuits in industrial panels, machinery and automation equipment.
What is the current rating of the US10C300.5A?
The IMO US10C300.5A has a rated operational current of 0.5 A.
How many poles does this circuit breaker have?
The US10C300.5A has a 3-pole configuration, allowing three conductors to be protected and disconnected simultaneously.
What does the C curve characteristic mean?
The C curve magnetic trip operates at approximately five to ten times the rated current, allowing moderate inrush currents while maintaining dependable overload and short-circuit protection.
What voltage can the US10C300.5A support?
The three-pole breaker is rated for up to 480Y/277 V AC under UL specifications and up to 415 V AC under IEC specifications.
How is the IMO US10C300.5A installed?
The breaker mounts onto a standard EN 60715 DIN rail inside an electrical control panel or machinery enclosure.
Trusted by Industrial Panel Builders
IMO Precision Controls circuit protection products are used by panel builders, OEM manufacturers, machine builders and automation engineers seeking compact, dependable and straightforward electrical protection solutions.
