Siemens Circuit breaker, molded case, 3-pole, 690V, 125A

Product Overview

The Siemens 3VA1112-5EF36-0AB0 is a SENTRON 3VA1-series molded-case circuit breaker (MCCB), IEC Frame 160, designed for line and feeder protection in industrial, commercial, and building electrical distribution systems. It provides adjustable thermal-magnetic overload protection and high short-circuit breaking capacity, making it suitable for main feeders, sub-distribution boards and circuits with high prospective fault currents.

Key Features

• 3-pole molded-case circuit breaker, frame size 160
• Adjustable overload protection (Ir adjustable from 88 A to 125 A)
• High breaking capacity — Icu = 55 kA @ 415 V AC (class M)
• Adjustable short-circuit protection (Ii = 5 … 10 × In)
• Suitable for operational voltages up to 690 V AC / 500 V DC
• Front terminal, box-type connections on both sides — accommodates large conductors (up to 70 mm²)
• Long mechanical and electrical life (typical 20,000 operating cycles / 9,000 switching cycles at 380–415 V AC)
• Compact design relative to capacity — robust construction for industrial applications

Technical Specifications

• Article Number: 3VA1112-5EF36-0AB0
• Product Family: SENTRON 3VA1 molded-case circuit breakers
• Number of Poles: 3
• Frame Size: 160
• Rated Operational Current (In): 125 A (at 40 °C)
• Adjustable Overload Setting (Ir): 88 A … 125 A
• Short-Circuit Protection Setting (Ii): 5 … 10 × In
• Rated Operational Voltage (AC): up to 690 V AC
• Rated Insulation Voltage (Ui): 800 V AC
• Rated Operational Voltage (DC): up to 500 V DC
• Breaking Capacity (Icu) @ 415 V AC: 55 kA (class M)
• Breaking Capacity (Icu) @ 240 V AC: 85 kA
• Short-Circuit Making Capacity (Icm) @ 415 V AC: 121 kA
• Terminal Type / Conductor Cross-Section: Front box-type terminals, 1.5 … 70 mm² (solid/stranded conductors)
• Mechanical Service Life: approx. 20,000 switching cycles
• Electrical Endurance (AC-1, 380/415 V): approx. 9,000 cycles
• Protection Class (front): IP40
• Connection Type: Box-type front terminals on both sides
• Net Weight (approx.): 1.064 kg
• Ambient Operating Temperature Range: –25 °C … +70 °C
• Storage Temperature: –40 °C … +80 °C

Compliance & Certifications

• Compliant with IEC / EN standards for low-voltage molded-case circuit breakers
• Breaking capacity class M — suitable for circuits with high prospective short-circuit currents
• Designed for industrial, commercial, and building distribution applications

Applications

This 3VA1112-5EF36-0AB0 molded-case circuit breaker is ideal for main feeder protection, sub-distribution boards, motor feeder circuits, and general installation protection in industrial plants, commercial buildings, and large residential complexes. Its adjustable overload and short-circuit settings, high breaking capacity and robust terminals make it particularly suitable for installations with high fault current potential, heavy loads or variable load conditions, ensuring safe and reliable protection across a wide range of distribution scenarios.