Telergon Switch disconnector, size 0, 3-pole, 125A Part number S5-01253PS0

Product Overview

The S5-01253PS0 is a 125A, 3-pole AC switch-disconnector with terminal mounting designed for on-load switching applications up to 1000V. Engineered with high-performance materials and advanced contact technology, this Size 0 unit delivers reliable circuit isolation and control for demanding industrial and commercial power distribution systems. The device features a compact design that enables safe manual operation in diverse environmental conditions while providing robust breaking and making capabilities.

Key Features:

• High Breaking Capacity: Rated breaking current up to 8 times the operational current with ability to establish and support short circuit currents up to 100kA for enhanced protection
• Advanced Contact Technology: Self-cleaning blade-type contacts with pre-arc zones and silver alloy coating ensure long-term, fault-free energy transmission and extended electromechanical life
• Extreme Environment Performance: Engineered for uninterrupted duties in extreme tropic and polar conditions, as well as polluted industrial environments with excellent thermal stability
• Quick-Make Quick-Break Mechanism: Independent switching action through accumulation of elastic potential energy provides high-speed contact operation for enhanced safety
• High-Quality Insulation: Sandwich-type body constructed from self-extinguishing materials delivering excellent electrical insulation, low smoke emission, and high resistance to electromechanical stress
• Terminal Connection Type: Lug terminal configuration accommodates both flexible and solid conductors up to 95mm² for versatile installation options
• Compact Footprint: Size 0 design with space-efficient dimensions enables installation in confined panel spaces while maintaining full operational capability
• Manual Operation: Direct handle or external panel handle options available for ergonomic control and safe switching operation

Technical Specifications:

• Article Number: S5-01253PS0
• Rated Operational Current: 125A
• Rated Insulation Voltage: 1000V AC
• Poles: 3-Pole configuration
• Connection Type: Terminal (Lug)
• Cable Capacity: 95mm² (flexible and solid conductors)
• Operating Temperature: Up to 65°C ambient
• Dimensions: 129 x 122 x 77mm
• Colour: Grey
• Size Classification: Size 0
• Operational Frequency: 50/60Hz
• Mounting Type: Base mounting with fixed screws to enclosure

Compatible Accessories:

• Auxiliary Contacts: D5LAU01 (1NO + 1NC) for Size 0-4 units, 16A resistive/4A inductive load at 250VAC
• Protective Shroud: DS-CU01 (125-200A terminal shroud kit)
• Direct Handle: S5000 40-250A direct handle kit for manual operation
• Panel Handle: S5000 40A-250A external panel handle for door-mounted control
• Extension Shafts: S5000/L/F L=250mm and S5/L/F/M11 L=387mm for extended reach applications
• Safety Lock Device: Key lock device for securing handle in OFF position (or ON position upon request)
• Bridging Links: Connection bridges for parallel configurations

Compliance & Certifications:

• IEC 60947-3 (Low-voltage switchgear and controlgear)
• EN standards compliance
• Environmental requirements compliant with self-extinguishing materials and low smoke emission properties

Applications:

Ideal for power distribution panels requiring isolation and on-load switching, motor control centers as main switches, HVAC systems, UPS installations, power factor correction equipment, low-voltage switchboards, transformer output isolation, generator set distribution, machinery control and local safety isolation, building section power distribution, factory area power control, photovoltaic inverter switching, and general industrial process equipment requiring reliable circuit isolation and control in harsh or polluted environments.