Siemens Miniature circuit breaker, B-curve, 1-pole, 230V, 10kA, 25A Part number 5SL4125-6

Product Overview The Siemens 5SL4125-6 is a high-performance SENTRON miniature circuit breaker designed for sensitive medium-current single-pole applications in residential, commercial, and specialized electrical installations. This 1-pole device features a 25A current rating with 230/400V operational voltage and 10kA breaking capacity, incorporating B-curve trip characteristics specifically optimized for resistive loads and sensitive electronic circuits with minimal inrush currents. The innovative 5SL4 series design includes advanced safety features such as tool-free removal capability, effective touch protection, and enhanced connectivity options, making it ideal for protecting sensitive equipment and ensuring rapid fault response in applications requiring fast trip characteristics.

Key Features

• Optimal Current Rating: 25A current capacity for medium-current sensitive applications
• High Breaking Capacity: 10kA short-circuit breaking capacity for robust fault protection
• 1-Pole Configuration: Optimized for single-pole applications with sensitive loads
• B-Curve Trip Characteristic: Fast-response protection for sensitive circuits (3-5 In trip range)
• Dual Voltage Rating: 230/400V operational capability for flexible installation requirements
• Compact Single Module: Space-efficient 1-module width design with 70mm mounting depth
• Tool-Free Release System: Revolutionary latching slide mechanism for easy removal without tools
• Enhanced Safety Features: Effective touch protection with colored switch position indicator
• Wide Conductor Range: Accommodates conductors up to 35mm² with rectangular terminals
• Current Limiting Class 3: Advanced arc energy limitation for enhanced safety

Technical Specifications

• Current Rating: 25A
• Operating Voltage: 230/400V AC
• Breaking Capacity (Icn): 10kA at 230V and 400V according to EN 60898
• Breaking Capacity (Icu): 10kA at 230V and 400V according to IEC 60947-2
• Number of Poles: 1-pole (single pole protected)
• Trip Curve: B (3-5 In)
• Frequency: 50-60 Hz
• Current Limiting Class: 3
• Modular Width: 1 module
• Mounting Depth: 70mm
• Net Weight: 0.1595 kg
• Protection Class: IP20
• Operating Temperature: -25°C to +55°C
• Overvoltage Category: 3
• Pollution Degree: 2
• Conductor Cross-Section: Up to 35mm² with pin busbars
• Country of Origin: Romania
• EAN: 4001869439266

Applications This 1-pole medium-current B-curve miniature circuit breaker is particularly suitable for:

• Medium-current lighting circuits requiring fast trip response
• Sensitive electronic equipment and semiconductor circuit protection
• Residential distribution systems with minimal inrush current requirements
• Medium-power appliances with resistive loads
• Solar panel installation protection circuits requiring sensitive response
• UPS and battery system protection
• Computer and server room electrical circuits
• Laboratory and testing equipment protection
• Medical equipment and sensitive instrumentation circuits
• High-quality lighting systems with minimal surge characteristics
• Generator and backup power system circuits
• Specialized industrial applications requiring fast fault detection

B-Curve Characteristics & Benefits

• Fast Trip Response: Trips between 3-5 times rated current for rapid fault detection
• Sensitive Load Protection: Optimized for circuits with minimal inrush current requirements
• Enhanced Equipment Safety: Faster response to fault conditions protects sensitive equipment
• Reduced Damage Risk: Quick isolation prevents damage to connected sensitive devices
• Ideal for Resistive Loads: Perfect for lighting, heating, and electronic circuits
• Generator Compatibility: Suitable for installations with limited fault current availability
• Precision Protection: Balanced sensitivity without unnecessary nuisance tripping

Advanced Design Features

• Latching Slide System: Revolutionary tool-free removal from bus-mounted assemblies with effective touch protection and latch-down option
• Rectangular Terminal Design: Enhanced cable entry capability with accommodation for pin busbars and conductors up to 35mm²
• Colored Switch Position Indicator: Easy-to-read visual indication integrated in the handle for clear operational status
• Consistent Bus Mounting: Compatible with comprehensive Siemens bus mounting concept throughout the entire range
• Accessory Compatibility: Quick and easy mounting of additional components including arc fault detection devices (AFDD), auxiliary switches, fault signal contacts, shunt trips, and undervoltage releases
• Handle Locking Capability: Provision for handle locking device to prevent unauthorized switching
• Ergonomic Design: User-friendly handle and housing contours for comfortable manual operation

Medium-Current B-Curve Application Benefits

• Optimal Sensitivity: Designed specifically for medium-current applications requiring fast trip response
• Load Compatibility: Perfect balance between protection and operational continuity for sensitive loads
• Enhanced Equipment Protection: Faster fault detection prevents damage to connected sensitive equipment
• System Reliability: Reduces the risk of equipment damage through rapid fault isolation
• Installation Flexibility: 230/400V capability provides installation versatility
• Thermal Management: Optimized design for reliable operation at 25A capacity

Safety & Installation Benefits

• Touch Protection: Integrated terminal touch protection protects installers from electrical shock during connection
• Tool-Free Maintenance: Individual devices can be removed from bus-mounted assembly without tools for easy servicing
• Enhanced Wiring Space: Larger wiring space with easily accessible and safe line connections
• Climate Resistant: Designed according to IEC standards for reliable operation in various environmental conditions
• Sealable Handle: Optional sealing capability for enhanced security applications
• Better World Product: Designed for disassembly and extended product life for environmental sustainability

Compliance & Certifications

• Standards Compliance: EN 60898-1, IEC 60947-2
• RoHS Compliance: Compliant since June 1, 2013
• WEEE Directive: Subject to take-back obligations under directive 2012/19/EU
• REACH Regulation: Contains Lead in concentrations higher than 0.1% w/w
• Export Control: AL: N / ECCN: N
• Product Class: B - Return restricted, contact Siemens partner
• Quality Certifications: CE marking, SENTRON quality standards

Product Classification

• eClass: 27-14-19-01 (versions 6-14)
• ETIM: EC000042 (versions 7-9)
• UNSPSC: 39-12-16-03
• Product Group: 3804

Download existing graphical data for this product:

• Product Datasheet
• Installation Manual
• SENTRON Product Catalog
• Technical Documentation