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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 5SY7120-7 |
| Alternative Part Number | 5SY71207 |
| Manufacturer | Siemens |
| Type | Miniature circuit breaker |
| Number of Poles | 1 |
| Tripping Characteristic Class | C |
| Rated Current (AC) | 20 A |
| Rated Voltage (AC) | 230/400 V |
| Rated Voltage (DC) | Maximum 72 V |
| Rated Breaking Capacity (AC) | 15 kA according to EN 60898 / 25 kA according to IEC 60947-2 |
| Rated Breaking Capacity (DC) | 15 kA according to IEC 60947-2 |
| Energy Limiting Class | 3 |
| Mechanical Service Life | Typical 20,000 switching cycles |
| Overvoltage Category | III |
| Degree of Pollution | 3 |
| Insulation Voltage | 440 V with multi-phase operation (AC rated value) |
| Protection Class IP | IP20 with connected conductors |
| Ambient Temperature Range | -25 °C to +55 °C during operation, -40 °C to +75 °C during storage |
| Mounting Type | Quick assembly system |
| Mounting Position | Any |
| Width | 18 mm |
| Height | 90 mm |
| Depth | 76 mm |
| Installation Depth | 70 mm |
| Net Weight | 161 g |
| Product Features | Halogen-free, sealable, silicon-free, touch protection, properties for main switches in accordance with EN 60204-1 |
| Connectable Conductor Cross-Section | Solid: 0.75 mm² to 35 mm², Stranded: 0.75 mm² to 35 mm², Finely stranded with wire end processing: 0.75 mm² to 25 mm² |
| Tightening Torque | 2.5 N·m to 3 N·m (with screw-type terminals) |
The Siemens 5SY7120-7 is a robust miniature circuit breaker designed to provide reliable overcurrent protection in a variety of applications. Engineered for quick assembly, this 1-pole circuit breaker features a C tripping characteristic, ensuring a precise response to overcurrent conditions, making it suitable for use in both commercial and industrial environments.
With a rated operational voltage of 230/400V and a rated current of 20A, the 5SY7120-7 is capable of handling a diverse range of electrical loads. Its impressive breaking capacity of 15kA according to IEC 60947-2 and EN 60898 standards, along with a 25kA breaking capacity as per IEC 60947-2, highlights its ability to safely interrupt fault currents and protect downstream equipment.
The compact design, with a width of only 18mm per pole, allows for efficient use of space within electrical distribution boards. The device's mechanical service life is rated at 20,000 cycles, indicating its durability and long-term reliability. Additionally, the circuit breaker is designed to be sealable, halogen-free, and silicon-free, which contributes to its overall safety and environmental friendliness.
The 5SY7120-7 also features a quick assembly system for ease of installation and can be mounted in any position, providing flexibility in various installation scenarios. Its ambient operating temperature range of -25°C to +55°C ensures consistent performance across a wide range of environmental conditions.
Overall, the Siemens 5SY7120-7 miniature circuit breaker is a high-quality protective device that offers a combination of performance, safety, and ease of use, making it an excellent choice for safeguarding electrical circuits in a multitude of settings.
Commonly Asked Questions
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Read more...Is Marvo a credible parts supplier?
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Read more...Have steps been taken to ensure quality control?
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Frequently Asked Questions
What is the tripping characteristic class of this circuit breaker?
The tripping characteristic class of this miniature circuit breaker is Class C, which means it is designed to trip quickly to protect circuits from overloads and short circuits.
Can this circuit breaker be used in both AC and DC applications?
Yes, this miniature circuit breaker is suitable for both AC and DC applications, providing versatility in its use across different electrical systems.
What is the rated operational voltage for this device?
The rated operational voltage for this device is 230V for single-phase operation and 400V for multi-phase operation with AC current.
What is the rated switching capacity current for this circuit breaker?
The rated switching capacity current for this circuit breaker is 15kA according to IEC 60947-2 and EN 60898 standards.
What is the mechanical service life of this circuit breaker?
The mechanical service life of this circuit breaker is typically around 20,000 switching cycles, indicating its durability and reliability over time.
Is this circuit breaker halogen-free?
Yes, this circuit breaker is halogen-free, making it an environmentally friendly choice for electrical installations.
What is the energy limiting class of this circuit breaker?
The energy limiting class of this circuit breaker is Class 3, which refers to its ability to limit the let-through energy in the event of a fault.
Can supplementary devices be installed with this circuit breaker?
Yes, supplementary devices can be installed with this circuit breaker, allowing for additional functionality and customisation according to specific requirements.
What is the insulation voltage rating for this device?
The insulation voltage rating for this device is 440V for both single-phase and multi-phase operation at AC.
What are the environmental operating conditions for this circuit breaker?
This circuit breaker can operate in ambient temperatures ranging from -25°C to +55°C and can be stored in temperatures ranging from -40°C to +75°C.
Part conditions explained
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New unsealed: The product is in its original packaging, but the packaging has been opened or unsealed. It has never been used and should be in near pristine condition.
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New unboxed: The product does not come in its original packaging, but it has never been used and is in great working condition.
Refurbished: The product has been previously used, but it has undergone a thorough refurbishment process to restore it to a like-new or functional condition. Any defects or issues have been addressed, making it suitable for reuse.
Used: The product has been previously owned and has been used. It may show signs of wear and tear but is still functional and operational. The condition may vary depending on the specific item and its usage history.
