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NDCU Series (Miniature Circuit Breakers / Thermal-Magnetic Protection)
The ABB NDCU-12C (64804031A) is a high-quality miniature thermal-magnetic circuit breaker designed for low-voltage electrical systems. It provides effective protection against overloads and short circuits while ensuring safety for both equipment and personnel.
The NDCU-12C is suitable for residential, commercial, and light industrial applications. Its compact modular design allows easy integration into distribution boards, control panels, and motor circuits.
This breaker offers precise tripping characteristics, visual indication of operational status, low maintenance, and long-term reliability. It complies with international safety standards and is engineered for repeated operational cycles, making it suitable for both normal and emergency conditions.
Electrical distribution boards in homes, offices, and commercial buildings.
Protection of small motors, pumps, fans, and HVAC equipment.
Light industrial and commercial control panels with low-voltage circuits.
Compact installations requiring precise thermal-magnetic protection.
Circuits needing reliable short-circuit and overload protection with visual trip indication.
Dual Protection – Combines thermal overload and magnetic short-circuit protection.
Compact Design – Saves panel space and supports modular installation.
Durable and Reliable – Long operational life with minimal maintenance.
Visual Trip Indicators – Clear display of ON/OFF and tripped status.
Standards Compliance – Meets IEC 60898 and IEC 60947-2.
Flexible Mounting – Supports DIN rail and panel mounting.
Precise Tripping – Accurate response to overload and short-circuit conditions.
Wide Applications – Suitable for residential, commercial, and light industrial environments.
| Parameter | Specification |
|---|---|
| Model | ABB NDCU-12C |
| Part Number | 64804031A |
| Rated Operational Voltage | 230/400 V AC |
| Rated Current | 12 A |
| Tripping Characteristic | Class C, thermal-magnetic |
| Number of Poles | 1 |
| Breaking Capacity | 6 kA |
| Mounting Type | DIN rail / Panel mount |
| Operating Temperature | -25°C to +60°C |
| Degree of Protection | IP20 |
| Dimensions (HxWxD) | 80 x 17.5 x 70 mm |
| Weight | 0.13 kg |
| Standards Compliance | IEC 60898 / IEC 60947-2 |
| Model | Rated Current (A) | Poles | Breaking Capacity (kA) | Weight (kg) | Dimensions (HxWxD mm) |
|---|---|---|---|---|---|
| NDCU-01C | 1 | 1 | 6 | 0.11 | 80 x 17.5 x 70 |
| NDCU-02C | 2 | 1 | 6 | 0.11 | 80 x 17.5 x 70 |
| NDCU-03C | 3 | 1 | 6 | 0.12 | 80 x 17.5 x 70 |
| NDCU-06C | 6 | 1 | 6 | 0.14 | 80 x 17.5 x 70 |
| NDCU-10C | 10 | 1 | 6 | 0.15 | 85 x 17.5 x 75 |
| Model | Rated Current (A) | Poles | Breaking Capacity (kA) | Weight (kg) | Dimensions (HxWxD mm) |
|---|---|---|---|---|---|
| Emax 2 1600 | 1600 | 3 | 100 | 58 | 440 x 220 x 200 |
| Tmax XT1 630 | 630 | 3 | 50 | 25 | 350 x 200 x 180 |
| S203 C16 | 16 | 3 | 10 | 0.25 | 85 x 52.5 x 70 |
| S201 B10 | 10 | 1 | 6 | 0.12 | 80 x 17.5 x 70 |
| S404 M32 | 32 | 4 | 10 | 0.45 | 100 x 70 x 85 |
Q1: What type of protection does NDCU-12C provide?
A1: Thermal overload and magnetic short-circuit protection for low-voltage circuits.
Q2: What is the rated current?
A2: 12 A.
Q3: How many poles does it have?
A3: 1 pole.
Q4: Can it be mounted on a DIN rail?
A4: Yes, it supports both DIN rail and panel mounting.
Q5: What is the breaking capacity?
A5: 6 kA.
Q6: Is it suitable for motor protection?
A6: Yes, for small motors, fans, pumps, and HVAC systems.
Q7: What is the operating temperature range?
A7: -25°C to +60°C.
Q8: Does it have visual status indication?
A8: Yes, ON/OFF and tripped conditions are clearly visible.
Q9: Is it compliant with international standards?
A9: Yes, IEC 60898 and IEC 60947-2.
Q10: Where is this breaker typically used?
A10: Residential, commercial, and light industrial applications requiring reliable compact thermal-magnetic protection.