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- NAMC-11C W/O
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- Sweden
- 90 x 54 x 78 mm
- 0.45kg
- 64008757/64008757-P
- Xiamen, China
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Product Overview: ABB NAMC-11C W/O / 64008757 / 64008757-P
Brand
Series
NAMC Series (Motor Protection Circuit Breaker)
Product Description
The ABB NAMC-11C W/O (64008757 / 64008757-P) is a high-quality motor protection circuit breaker specifically designed to safeguard low-voltage motors against overloads, short circuits, and phase failure. The “W/O” designation indicates it is delivered without auxiliary contacts, providing a streamlined solution for installations that do not require remote signaling.
The device combines thermal and magnetic protection for precise tripping under overload conditions while responding instantly to short-circuit events. Its compact and robust design allows it to be integrated seamlessly into industrial, commercial, or residential motor control panels. The NAMC-11C W/O ensures both motor safety and operational reliability while being simple to install and operate.
Applications
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Motor protection for pumps, fans, compressors, and conveyors.
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Low-voltage motor control panels in industrial production lines.
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HVAC systems in commercial and residential buildings.
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Small and medium-sized machinery requiring overload and short-circuit protection.
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Renewable energy systems, including solar and wind-driven motor applications.
Product Advantages
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Reliable Motor Protection – Ensures both thermal and magnetic protection to prevent motor damage.
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Compact Design – Saves space in control cabinets and simplifies panel layout.
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Durable Construction – Designed for repeated operations with long-term reliability.
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Manual Operation Capability – Allows easy manual disconnection for maintenance purposes.
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Flexible Current Settings – Adjustable to suit a range of motor sizes and operating conditions.
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Easy Installation – Supports DIN rail mounting or direct panel installation.
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Clear Visual Indication – Provides clear ON/OFF status for rapid diagnostics.
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Standards Compliance – Conforms to international low-voltage motor protection standards.
Technical Parameters
| Parameter | Specification |
|---|---|
| Model | ABB NAMC-11C W/O |
| Part Number | 64008757 / 64008757-P |
| Rated Operational Voltage | 690 V AC |
| Rated Current | 1–10 A |
| Tripping Characteristic | Class C, thermal-magnetic |
| Number of Poles | 3 |
| Breaking Capacity | 10 kA |
| Mounting Type | DIN rail / Panel mount |
| Operating Temperature | -25°C to +60°C |
| Degree of Protection | IP20 |
| Dimensions (HxWxD) | 90 x 54 x 78 mm |
| Weight | 0.45 kg |
| Auxiliary Contacts | Not included (W/O version) |
| Standards Compliance | IEC 60947-2 / IEC 60947-4-1 |
Recommended Related Models in NAMC Series
| Model | Rated Current (A) | Poles | Breaking Capacity (kA) | Weight (kg) | Dimensions (HxWxD mm) |
|---|---|---|---|---|---|
| NAMC-6C | 0.5–6 | 3 | 6 | 0.30 | 85 x 50 x 75 |
| NAMC-16C | 10–16 | 3 | 10 | 0.50 | 100 x 60 x 80 |
| NAMC-20C | 16–20 | 3 | 10 | 0.55 | 105 x 60 x 85 |
| NAMC-32C | 25–32 | 3 | 10 | 0.70 | 115 x 70 x 90 |
| NAMC-40C | 32–40 | 3 | 10 | 0.75 | 120 x 75 x 95 |
Recommended Popular ABB Models
| 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 |
FAQ (10 Questions)
Q1: What does “W/O” mean in the NAMC-11C W/O model?
A1: It means the unit is delivered without auxiliary contacts.
Q2: What is the rated current for this device?
A2: The current range is adjustable from 1 to 10 A.
Q3: How many poles does this breaker have?
A3: It has 3 poles.
Q4: Can it be mounted on a DIN rail?
A4: Yes, it supports both DIN rail and panel mounting.
Q5: What types of motor protection does it provide?
A5: Thermal protection for overloads and magnetic protection for short circuits.
Q6: Is it suitable for HVAC motor systems?
A6: Yes, it is widely used for small and medium-sized motors including HVAC systems.
Q7: What is the maximum breaking capacity?
A7: The breaking capacity is 10 kA.
Q8: What is the operating temperature range?
A8: -25°C to +60°C.
Q9: Does it have visual status indication?
A9: Yes, it clearly indicates ON/OFF and trip status.
Q10: Does this model comply with international standards?
A10: Yes, it conforms to IEC 60947-2 and IEC 60947-4-1 standards.