The Siemens 5SL4240-7RCZ24 is a high-performance 5SL4 series Miniature Circuit Breaker (MCB) engineered for dependable overload and short-circuit protection in commercial and industrial electrical distribution networks. Featuring a 2-pole construction, 40A rated current, and Type C tripping characteristics, this MCB delivers a high 10kA breaking capacity at 415V AC, making it ideal for handling moderate inductive load inrushes and high fault levels.
10kA Short-Circuit Breaking Capacity: Certified for a high breaking capacity of 10kA at 415V AC, providing superior fault protection for equipment and wiring.
40A Rated Current & 2-Pole Design: Protects both phases or phase-and-neutral conductors in 2-pole AC electrical circuits.
Type C Tripping Characteristic: Operates at 5 to 10 times rated current ( to ), making it perfect for inductive loads with moderate inrush currents like small motors, transformers, and LED lighting banks.
Compact DIN-Rail Mounting: Standard modular width designed for effortless, snap-on installation onto standard 35mm DIN rails inside distribution boards.
Finger-Safe Touch Protection: Features IP20 touch-proof terminals to safeguard technicians from accidental electrical contact during maintenance.
High Operational Endurance: Manufactured to Siemens quality standards for long mechanical and electrical service life in demanding environments.
Commercial & Industrial Distribution Boards (DBs)
Inductive Loads, HVAC Control Circuits & Pump Starters
Motor Feeder Protection & Automation Control Panels
Commercial Buildings, OEM Machinery & Power Outlets
Q1: What does "Type C" tripping characteristic mean for the Siemens 5SL4240-7RCZ24 MCB?
A: Type C characteristic means the breaker trips instantaneously between 5 to 10 times its rated current. It is designed to accommodate moderate switching inrushes from motors, transformers, and industrial lighting without nuisance tripping.
Q2: What is the short-circuit breaking capacity of this MCB?
A: It is rated at 10kA at 415V AC, making it suitable for main distribution panels and sub-panels exposed to high potential fault currents.
Q3: How many poles does the 5SL4240-7RCZ24 feature, and what is its rated current?
A: This model is a 2-Pole circuit breaker with a rated current capacity of 40A.
Q4: Can this MCB be mounted on a standard DIN rail?
A: Yes, it features a standard modular footprint designed for fast, snap-on mounting on standard 35mm DIN rails.
Siemens 5ST3 Series Auxiliary Switches & Fault Signal Contacts: Snap-on accessories for remote indication of MCB trip status to PLCs or alarm indicators.
Siemens 5ST3 Series Shunt Trips & Undervoltage Releases: Allows emergency remote tripping of the 5SL4 MCB.
Siemens Busbar Systems (5ST3 Series): Pin and fork-type busbars for quick, clean, and safe parallel wiring across multiple MCB poles.
| Parameter | Value |
|---|---|
| Product Type | Miniature Circuit Breaker (MCB) |
| Series | SENTRON 5SL4 |
| Model | 5SL4240-7RCZ24 |
| Rated Voltage | 415 V AC (India variant) |
| Rated DC Voltage | 72 V DC |
| Number of Poles | 2-Pole (2P) |
| Rated Current (In) | 40 A |
| Tripping Characteristic | Type C |
| Breaking Capacity (Icu) | 10 kA |
| Mounting Type | DIN Rail |
| Terminal Type | Screw terminal |
| IP Rating | IP20 |
| Mechanical Service Life | 10,000 operating cycles (typical) |
| Overvoltage Category | III |
| Degree of Pollution | 3 |
| Width | ~36 mm (2 modules × ~18mm) |
| Height | ~90 mm |
| Depth | ~90 mm |
| Standards/Approvals | CE, VDE |
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