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IMO UB10C3005A 5A UL 489 Circuit Breaker, 3-pole, C Curve, 10kA, 480Y/277V AC
5A 3-pole miniature circuit breaker with C-curve thermo-magnetic protection, 10kA interrupting capacity, DIN-rail mounting, and UL 489 approval.
Why Choose the IMO UB10C3005A Circuit Breaker?
The IMO Precision Controls UB10C3005A is a 5A 3-pole miniature circuit breaker for three-pole machine-control and equipment branches whose load and conductor design specifies 5A protection. It is rated for 480Y/277V AC and provides UL 489 branch-circuit protection in industrial control panels, machinery, and distribution equipment when applied within its electrical ratings.
Thermo-magnetic operation combines a thermal response for sustained overloads with rapid magnetic tripping during severe faults. The C-curve characteristic is designed for correctly engineered loads with moderate inrush, while the contact-position indicator gives maintenance personnel a clear visual reference during inspection and troubleshooting.
ā” 5A Rating
Protects a correctly sized circuit rated for 5A
š 3 Poles
Provides 3-pole protection for a properly designed three-conductor AC branch
š”ļø 10kA Capacity
Offers 10kA short-circuit breaking capacity for suitable electrical systems
ā
UL 489 Approved
Approved for branch-circuit protection when selected and installed correctly
ā ļø Verify the Complete 5A 3-pole Circuit Design
Do not select this breaker from current rating alone. Confirm the 5A rating, 3-pole configuration, conductor current, load requirements, 480Y/277V AC rating, available fault current, C trip curve, ambient conditions, and applicable electrical codes before installation.
š 5A C-Curve Magnetic Trip Range
The C-curve magnetic element operates at 5ā10 times rated current. For the UB10C3005A, that corresponds to a specified instantaneous magnetic range of approximately 25ā50A. The thermal element provides overload response below severe fault levels. Always confirm coordination with normal startup current and upstream or downstream protective devices.
Key Features & Benefits
- Rated for 480Y/277V AC
- C-curve magnetic trip range of approximately 25ā50A
- Thermo-magnetic overload and short-circuit protection
- Contact-position indicator for visual status checks
- 18ā3 AWG conductor range with 2.5 Nm fastening torque
- 20,000 mechanical and 6,000 electrical operations
- UL 489, IEC 60947-2, IEC 60898-1, and RoHS compliance
Technical Specifications
| Dimensions |
4.25" Length x 2.06" Width x 2.64" Depth (108mm x 52.5mm x 67mm) |
| Rated Current |
5 Amp |
| Voltage Rating |
480Y / 277V AC |
| Number of Poles |
3 |
| Tripping Curve |
C (5-10 In) |
| Calibration Temperature |
104 F (40 C) |
| Operating Temperature |
-13 F to 131 F (-25 C to 55 C) |
| Rated Operational Frequency |
50/60 Hz |
| Short Circuit Breaking Capacity |
10kA |
| Lifespan |
20,000 Operations (Mechanical), 6000 Operations (Electrical) |
| Vibration Resistance |
+/- 1mm @ 5-25 Hz; 50 m/sĀ² @ 25-150 Hz |
| Fastening Torque |
2.5 Nm (22.2 lb/in) |
| Wire Range |
18-3 AWG |
| NEMA Rating |
NEMA 1 (IP20 - Protection from objects 12.5 mm (0.5") in diameter or greater) |
| Approvals |
UL 489, IEC 60947-2 & IEC 60898-1, RoHS Compliant |
š 3-pole Breaker Selection and Installation Overview
1. Calculate the Load: Confirm that conductor current and connected equipment are compatible with a 5A protective device.
2. Verify Pole and Voltage Requirements: Confirm that the circuit requires 3 poles and operates within the 480Y/277V AC rating.
3. Check Fault and Inrush Current: Verify the available fault current, 10kA breaking capacity, and compatibility of the C curve with normal startup demand.
4. Mount and Terminate: Install on DIN rail using conductors within the specified 18ā3 AWG range and apply the listed 2.5 Nm terminal torque.
5. Inspect Before Energizing: Verify wiring, labeling, protective-device coordination, and code compliance before commissioning.
Circuit-breaker selection and installation must be completed by qualified personnel in accordance with the equipment documentation and applicable electrical codes.
š Typical Uses for the 5A 3-pole Breaker
ā¢ Three-phase machine-control circuits
ā¢ Appropriately sized control transformers
ā¢ Small industrial equipment branches
ā¢ Three-pole AC circuits requiring a 5A breaker
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