The Siemens 5SL4220-7RCZ24 is a high-reliability 5SL4 series Miniature Circuit Breaker (MCB) engineered for effective overload and short-circuit protection in industrial, commercial, and automation control panels. Featuring a 2-pole configuration, 20A rated current, and Type C tripping characteristics, this MCB provides a strong 10kA breaking capacity at 415V AC, making it ideal for protecting lower-ampere feeder lines, inductive control circuits, and equipment.
10kA Short-Circuit Breaking Capacity: Certified for a high short-circuit breaking capacity of 10kA at 415V AC, protecting cables and machinery from severe electrical faults.
20A Rated Current & 2-Pole Design: Safely protects both phases or phase-and-neutral conductors in 2-pole AC electrical distribution networks.
Type C Tripping Characteristic: Operates instantaneously at 5 to 10 times rated current ($5 \times I_n$ to $10 \times I_n$), making it well-suited for inductive loads with moderate inrush surges like small motors, transformers, and solenoid valves.
Modular DIN-Rail Mounting: Compact standard footprint for easy, tool-free snap-on mounting on standard 35mm DIN rails.
Finger-Safe IP20 Touch Protection: Shrouded terminals prevent accidental direct contact, prioritizing installer and technician safety.
Industrial-Grade Reliability: Manufactured to Siemens SIRIUS/SENTRON quality standards for long mechanical and electrical service life under continuous operation.
Industrial Automation Control Cabinets & PLC Feeder Lines
Small Motor Control Circuits, Solenoid Valves & Pump Starters
Commercial & Residential Sub-Distribution Boards (DBs)
OEM Machinery, Power Outlets & Lighting Feeder Circuits
Q1: How does the 20A model (5SL4220-7RCZ24) differ from higher current models like the 25A or 32A in this series?
A: All models share the same 2-pole, 10kA, Type C design framework; the difference lies in the continuous current rating. The 20A model is calibrated for smaller loads and thinner cable protection compared to 25A or 32A units.
Q2: What does "Type C" tripping characteristic mean for this MCB?
A: Type C characteristic means the breaker trips instantaneously at 5 to 10 times its rated current, accommodating standard startup inrush currents without unwanted nuisance tripping.
Q3: Can this MCB be installed on a standard 35mm DIN rail?
A: Yes, it features a standardized modular housing designed for quick, tool-free snap-on mounting on standard 35mm DIN rails.
Q4: Is this breaker suitable for 415V two-phase or phase-and-neutral circuits?
A: Yes, its 2-pole construction and 415V AC rating make it suitable for two-phase or phase-plus-neutral line protection.
Siemens 5ST3 Series Auxiliary Switches / Fault Signal Contacts: Snap-on accessories for remote trip status signaling and PLC alarm feedback.
Siemens 5ST3 Series Shunt Trips & Undervoltage Releases: Accessories enabling automated or remote emergency trip activation.
Siemens 5ST3 Series Pin/Fork Busbars: Busbar systems for quick, organized power distribution across multiple MCB modules.
| Attribute | Technical Specification |
| Brand / Series | Siemens SENTRON 5SL4 |
| Product Type | Miniature Circuit Breaker (MCB) |
| Model Code / MLFB | 5SL4220-7RCZ24 |
| Number of Poles | 2-Pole |
| Rated Current ($I_n$) | 20 A |
| Tripping Characteristic | Type C ($5 \times I_n$ to $10 \times I_n$) |
| Rated Operational Voltage ($U_e$) | 415 V AC |
| Short-Circuit Breaking Capacity | 10 kA at 415 V AC |
| Supply Frequency | 50 / 60 Hz |
| Mounting Type | Standard 35 mm DIN Rail |
| Terminal Type | Screw Terminals (Finger-safe IP20) |
| Standards Compliance | IEC / EN 60898-1, IEC / EN 60947-2 |
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