Siemens Miniature circuit breaker, B-curve, 1-pole, 230V, 10kA, 20A

Product Overview The Siemens 5SL4120-6 is a high-performance SENTRON miniature circuit breaker designed for sensitive single-pole applications in residential, commercial, and specialized electrical installations. This 1-pole device features a 20A 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 and reliable overcurrent protection.

Key Features

• Standard Current Rating: 20A current capacity for common single-pole 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: 20A
• 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: 0.161 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: 4001869439259

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

• Standard lighting circuits requiring fast trip response
• Sensitive electronic equipment and semiconductor circuit protection
• Residential distribution systems with minimal inrush current requirements
• Standard appliances with resistive loads
• Solar panel installation protection circuits
• UPS and battery system protection
• Computer and IT equipment circuits
• Laboratory and testing equipment protection
• Medical equipment and sensitive instrumentation circuits
• Standard commercial lighting systems
• Generator and backup power system circuits
• Residential socket outlet protection with sensitive loads
• Educational facility electrical circuits requiring enhanced protection

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
• Standard Application Focus: Perfect current rating for common residential and commercial needs

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

Standard B-Curve Application Benefits

• Optimal Sensitivity: Designed specifically for standard 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
• Standard Rating: 20A capacity ideal for most common electrical protection requirements
• Cost-Effective Protection: Optimal solution for standard applications requiring sensitive trip characteristics

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