Siemens 3VA5112-4EC31-0AA0 Molded-Case Circuit Breaker 3P 125A 25kA

The Siemens 3VA5112-4EC31-0AA0 is a 3-pole SENTRON molded-case circuit breaker from the 3VA5 UL Frame 125 series, rated 125 A at 40 °C. It uses a TM230 thermal-magnetic overcurrent release with LI protection: overload trip (Ir) permanently fixed at 125 A and short-circuit trip (Ii) adjustable from 625 to 1250 A (5-10 x In). Breaking capacity is 25 kA at 480 V per UL 489 and 55 kA at 240 V per IEC 60947 class S.

Technical specifications:

• MLFB: 3VA5112-4EC31-0AA0
• Manufacturer: Siemens
• Product line: SENTRON
• Product type: Molded-case circuit breaker (UL file: SEAS)
• Poles: 3
• Rated current (In): 125 A at 40 °C
• Overcurrent release: TM230, LI protection
• Overload setting (Ir): 125 A permanently set
• Short-circuit setting (Ii): 625-1250 A (5-10 x In)
• Rated operating voltage: 690 V AC / 500 V DC
• Rated insulation voltage: 800 V
• Breaking capacity UL 489: 65 kA at 240 V / 25 kA at 480 V / 14 kA at 600Y/347 V
• Breaking capacity IEC 60947 (Icu, class S): 55 kA at 240 V / 36 kA at 415 V / 5 kA at 690 V
• HACR type (UL 489): Yes
• IP rating: IP40 (front)
• Operating temperature: -25 °C to 70 °C
• Dimensions (W x H x D): 76.2 mm x 140 mm x 76.5 mm
• Weight: 968 g
• Mechanical service life: 20,000 operating cycles
• Connection: Without (no lugs)
• Optional accessory: Motor drive

Features and benefits:

• Permanently fixed overload at 125 A with adjustable short-circuit trip from 625 to 1250 A eliminates field setting errors on overload
• IEC 60947 class S breaking capacity with Icu of 55 kA at 240 V and 36 kA at 415 V for high fault-level installations
• HACR-rated per UL 489 for heating, air conditioning, and refrigeration loads
• Wide operating temperature range of -25 °C to 70 °C suits demanding industrial environments
• Optional motor drive accessory enables remote or automated switching without field rewiring

Applications:

• System and feeder protection in 480 V industrial distribution boards and panelboards
• Branch circuit protection in commercial and industrial HVAC systems (HACR-rated)
• Main circuit breaker in motor control centers and switchgear rated up to 690 V AC
• Protection of cable runs and busbars in DC networks up to 500 V

Compliant with IEC 60947 and UL 489. Part of the Siemens SENTRON range.

Also known as: Siemens 3VA5112-4EC31-0AA0, Siemens SENTRON 3VA5 Frame 125 MCCB 3-pole 125A.