Siemens Sentron Molded case circuit breaker, Din rail, 4-pole, 125A, 25kA Part number 3VA1112-3GE42-0AA0

Product Overview

The Siemens 3VA1112-3GE42-0AA0 is a 4-pole molded-case circuit breaker from the SENTRON 3VA1 series, IEC Frame 160, designed for line protection. It features a thermal-magnetic trip unit (TM220) with long-delayed (L) and instantaneous (I) protection, an adjustable overload setting and 100% neutral conductor protection.

Key Features

• 4-pole design for three-phase plus neutral distribution systems
• Rated operational current: 125 A at 40 °C (frame size up to 160 A)
• Breaking capacity class N (Icu up to 25 kA at 415 V)
• Adjustable overload threshold (Ir ≈ 88–125 A) and instantaneous trip setting (Ii ≈ 1,250 A)
• Front-connected terminals, suitable for flat-bar and screw connections with nut-keeper kit
• Mechanical service life: approx. 20,000 switching operations; electrical endurance: ~9,000 / 6,300 cycles (AC-1)

Technical Specifications

• Product Series: SENTRON 3VA1 Molded-Case Circuit Breakers
• Article Number: 3VA1112-3GE42-0AA0
• Number of Poles: 4 (3 phases + neutral)
• Rated Operating Current (Ie): 125 A (at 40 °C)
• Rated Insulation Voltage (Ui): 800 V
• Maximum Rated Operational Voltage (Ue): 400-690 V AC / 600 V DC
• Breaking Capacity (Icu): 36 kA at 240 V, 25 kA at 415 V, 16 kA at 440 V, 7 kA at 690 V
• Connection Type: Front terminals with nut keeper kit; suitable for flat-bar 12×1 mm to 17×6.5 mm
• Dimensions: Height 130 mm, Width 101.6 mm, Depth 70 mm
• Net Weight (Approx.): 1.286 kg
• Protection Class (Front): IP40
• Ambient Temperature (Operating): -25 °C to +70 °C

Compliance & Certifications

• Designed to IEC / EN 60947-2 standards for molded-case circuit breakers
• Breaking capacity class conforms to class N in the IEC 60947 series
• Provided with full neutral conductor protection (100%)

Applications

This circuit breaker is suited for industrial and commercial distribution installations where a higher breaking capacity is required, such as feeder circuits, motor-control centres, and switch-gear panels. Its adjustable protection settings and four-pole configuration make it ideal for systems requiring neutral conductor protection along with three-phase load isolation.