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5SU1646-7FP20
RCBO, 6 kA, 4P Type A, 300mA, C-Char, In: 20A Un: 400V Energy limiting class 1: check for normative use limitations
- Stock status:
- Call for availability
- Manufacturer:
- Siemens
- Product code:
- 5SU1646-7FP20
Main documents
- Product datasheet
- Instruction sheet
- Catalogue
Related products
| Product | |
| Article Number (Market Facing Number) | 5SU1646-7FP20 |
| Product Description | RCBO, 6 kA, 4P Type A, 300mA, C-Char, In: 20A Un: 400V Energy limiting class 1: check for normative use limitations |
| Product family | Not available |
| Product Lifecycle (PLM) | PM300:Active Product |
| Price data | |
| Region Specific PriceGroup / Headquarter Price Group | 13F / 1BC |
| List Price | Show prices |
| Customer Price | Show prices |
| Surcharge for Raw Materials | None |
| Metal Factor | None |
| Additional Product Information | ||
| EAN | 4001869578316 | |
| UPC | Not available | |
| Commodity Code | 85362010 | |
| LKZ_FDB/ CatalogID | LV10 | |
| Product Group | 5516 | |
| Group Code | P310 | |
| Country of origin | Portugal | |
| Compliance with the substance restrictions according to RoHS directive | Since: 13.03.2013 | |
| Product class | B: return restricted, please contact your Siemens partner/contact | |
| WEEE (2012/19/EU) Take-Back Obligation | Yes | |
| REACH Art. 33 Duty to inform according to the current list of candidates | ||
| SCIP number | Not available | |
Product Description
5SU1646-7FP20
The Siemens 5SU1646-7FP20 is a 4-pole RCBO (Residual Current Circuit Breaker with Overcurrent protection) designed for comprehensive circuit protection, combining both residual current (earth leakage) and overcurrent (overload and short-circuit) protection in a single device. This model is particularly well-suited for three-phase systems that require a high level of operational reliability and safety.
With a C-curve tripping characteristic, it is ideal for applications with moderate inrush currents, such as inductive loads (e.g., motors, transformers). The Type A residual current protection ensures detection of both AC and pulsating DC leakage currents.
Key Features and Specification
- Rated Current (In): 20 A
- Rated Operating Voltage (Un): 400 V AC
- Breaking Capacity: 6 kA
- Poles: 4 (3-phase + Neutral)
- Tripping Curve: C-Characteristic (moderate inrush current tolerance)
- Residual Current Type: Type A
- Rated Residual Current: 300 mA
- Energy Limiting Class: 1(Note: check for normative use limitations as per standards)
- Mounting: DIN Rail
- Function: Earth leakage + Overcurrent protection in one device
Technical Information
- Number: 5SU1646-7FP20
- EAN: 4001869578316
- Commodity Code: 85362010
- Catalog ID: LV10
- Product Group: 5516
- Group Code: P310
- Lifecycle Status: PM300 – Active Product
Applications
- Ideal for commercial, industrial, and utility installations
- Provides protection for three-phase systems with neutral, such as motor circuits, HVAC units, or industrial machines
- The 300 mA sensitivity is especially useful for fire protection and equipment safety, though not for direct personal protection
- Suitable where both earth fault protection and overcurrent protection are required in a single module
Note on Energy Limiting Class 1:
This RCBO belongs to energy limiting class 1, which may involve restrictions under certain norms and standards. It is recommended to review normative guidelines for correct application and installation in regulated environments.
Summary:
The Siemens 5SU1646-7FP20 is a robust and compact solution for advanced protection of 3-phase circuits. With a C-curve, 20A rating, and 300mA residual current detection, it ensures high safety levels for equipment and installation infrastructure, while remaining compliant and reliable in diverse operational settings.
Frequently Asked Questions
What is the rule for installing an SPD?
✅ SPD (Surge Protection Device) connections should be as short as possible to minimize the voltage protection level (Up). The total length of connections to the network and earth should not exceed 50 cm to ensure effective surge protection.
How to Set Up a Surge Protector?
1.Turn off power at the circuit breaker.
2. Remove the old outlet.
3. Connect wires to the new surge-protected outlet per the manufacturer’s instructions.
4. Secure the outlet in the box and replace the cover plate.
5. Restore power and test the outlet.
What is the use of RCCB in Siemens?
✅ Siemens Residual Current Circuit Breakers (RCCBs) protect against electric shock by detecting leakage currents. If the leakage exceeds a set limit, the RCCB immediately disconnects the circuit, ensuring safety from direct or indirect contact with live components.
Where is an RCBO used?
✅ RCBOs (Residual Current Circuit Breakers with Overcurrent protection) are commonly used in various residential, commercial, and industrial applications. Typical use cases include power distribution boards, emergency lighting circuits, HVAC (Heating, Ventilation, and Air Conditioning) systems, socket outlets, and swimming pool equipment. RCBOs are ideal for protecting individual circuits where both earth fault and overcurrent protection are required.
Where to Install RCCB?
✅ RCCBs should be installed in the distribution board (DB box) or circuit breaker panel to protect against current leakages caused by faulty wiring, ageing insulation, or defective appliances.
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