The Siemens 5SL4225-7RCZ24 is a high-precision 5SL4 series Miniature Circuit Breaker (MCB) engineered for effective overload and short-circuit protection in commercial, industrial, and automation control systems. Featuring a 2-pole configuration, 25A rated current, and Type C tripping characteristics, this MCB offers a reliable 10kA breaking capacity at 415V AC, ensuring robust defense against electrical faults and inductive load surges.
10kA Short-Circuit Breaking Capacity: Certified for a high breaking capacity of 10kA at 415V AC, providing superior fault interruption to safeguard wiring and connected devices.
25A Rated Current & 2-Pole Design: 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 ideal for loads with moderate inrush currents like small motors, transformers, pumps, and lighting circuits.
Modular DIN-Rail Mounting: Standard compact footprint allows quick, tool-free snap-on mounting on standard 35mm DIN rails inside distribution cabinets.
Finger-Safe IP20 Touch Protection: Terminal shrouds prevent accidental direct contact, providing safety for installers and maintenance personnel.
Industrial-Grade Quality: Built to Siemens SIRIUS/SENTRON quality standards for long mechanical and electrical service life under continuous operation.
Commercial & Industrial Sub-Distribution Boards (DBs)
Motor Control Circuits, HVAC Units & Pump Feeder Lines
OEM Machinery, Automation Cabinets & Control Panels
Commercial Facility Lighting & Power Socket Protection
Q1: How does the 25A model (5SL4225-7RCZ24) differ from the 32A and 40A models in this series?
A: All models share the same 2-pole, 10kA, Type C design; the only difference is the continuous current rating. The 25A model is calibrated to trip at lower continuous current thresholds to match lighter wire gauges and smaller load requirements.
Q2: What does "Type C" tripping characteristic mean for this MCB?
A: Type C means the trip mechanism activates instantaneously at 5 to 10 times its rated current, accommodating standard startup inrush currents without 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 snap-on installation onto standard 35mm DIN rails.
Q4: Is this breaker suitable for 415V two-phase circuits?
A: Yes, its 2-pole design and 415V AC voltage rating make it well-suited for two-phase or phase-plus-neutral line protection.
Siemens 5ST3 Series Auxiliary Switches / Fault Signal Contacts: Snap-on module for remote trip indication and status feedback to PLCs.
Siemens 5ST3 Series Shunt Trips & Undervoltage Releases: Accessories for remote automated or emergency trip activation.
Siemens 5ST3 Series Pin/Fork Busbars: Enables fast, clean, and organized power distribution across multiple MCB poles.
| Attribute | Technical Specification |
| Brand / Series | Siemens SENTRON 5SL4 |
| Product Type | Miniature Circuit Breaker (MCB) |
| Model Code / MLFB | 5SL4225-7RCZ24 |
| Number of Poles | 2-Pole |
| Rated Current ($I_n$) | 25 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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