Siemens Fault signal contact, 1NO + 1NC

Product Overview The Siemens 5ST3020-0HG is a high-performance SENTRON fault signal contact featuring 1 normally open (NO) + 1 normally closed (NC) contact configuration, specifically engineered for miniature circuit breakers according to UL 489 standard. This auxiliary device provides reliable fault signaling capabilities for electrical protection systems, operating at rated voltages up to 480V AC/DC with exceptional electrical endurance of 6,000 operating cycles. The compact design enables universal retrofitting with all additional components while ensuring user-friendly installation and reliable safety during operation.

Key Features

• Dual Contact Configuration: Features both 1 NO and 1 NC contacts for versatile fault signaling applications
• UL 489 Compliance: Designed specifically for miniature circuit breakers meeting UL 489 standards
• High Voltage Rating: Operates reliably at 480V rated value with AC/DC compatibility (minimum 12V)
• Universal Compatibility: Compatible with 5SL, 5SY, 5SP series MCBs and RCBO 5SU1, FI 5SV devices
• Compact Modular Design: Single module width (9mm) for space-efficient installation
• Easy Installation: User-friendly connection technology with screw terminals for 0.5-2.5 mm² conductors
• High Electrical Endurance: Typically 6,000 operating cycles for long-term reliability
• IP20 Protection: Suitable for standard electrical enclosure applications

Technical Specifications

• Operating Voltage: 480V rated value (AC/DC minimum 12V)
• Insulation Voltage: 440V rated value
• Surge Voltage Resistance: 4kV rated value
• Contact Configuration: 1 NO + 1 NC
• Electrical Endurance: 6,000 operating cycles (typical)
• Conductor Cross-Section: 0.5-2.5 mm² (AWG 24-12)
• Tightening Torque: 1 N·m maximum
• Dimensions: 110 x 9 x 70 mm (H x W x D)
• Modular Width: 1 unit
• Net Weight: 0.080 kg
• Protection Class: IP20
• Country of Origin: India
• EAN: 4001869402246

Applications This fault signal contact is particularly suitable for:

• Miniature circuit breaker fault indication systems
• Industrial control panel applications
• Building automation and monitoring systems
• Motor control center installations
• Distribution board fault signaling
• Process control and safety systems
• Infrastructure protection applications
• Remote monitoring and alarm systems
• Electrical maintenance and diagnostic systems
• Power distribution fault detection

Compliance & Certifications

• Standards Compliance: IEC/EN60947-5-1, IEC/EN62019, UL489
• RoHS Compliance: Compliant since January 1, 2009
• WEEE Directive: Subject to take-back obligations under directive 2012/19/EU
• REACH Regulation: Currently no SVHC substances identified above 0.1% w/w threshold
• Export Control: AL: N / ECCN: EAR99
• Product Class: B - Return restricted, contact Siemens partner
• Environmental Product Declaration: Available with 4.19 kg CO2 equivalent total

Product Classification

• eClass: 27-14-35-02 (versions 6-14)
• ETIM: EC001286 (versions 7-9)
• UNSPSC: 39-12-15-22
• Product Group: 5507

Download existing graphical data for this product:

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