Siemens 3VA1225-5GF42-0AA0 SENTRON 4P Molded-Case Circuit Breaker 250A 55kA

The Siemens 3VA1225-5GF42-0AA0 is a SENTRON 4-pole molded-case circuit breaker from the 3VA1 range (IEC Frame 250), rated 250 A with class M breaking capacity (Icu = 55 kA at 415 V). The TM240 thermal-magnetic overcurrent release provides line protection (LI characteristic) with adjustable overload (Ir = 175-250 A) and instantaneous short-circuit (Ii = 1250-2500 A) tripping. Includes 100% neutral conductor protection and front terminals supplied with nut keeper kit on both ends.

Technical specifications:

• Order number (MLFB): 3VA1225-5GF42-0AA0
• Manufacturer: Siemens
• Product line: SENTRON
• Product type: Molded case circuit breaker, line protection
• Family: 3VA1 IEC Frame 250
• Number of poles: 4
• Rated current (In): 250 A
• Overcurrent release: TM240 (thermal-magnetic, ATAM)
• Protection function: LI (long-time + instantaneous)
• Adjustable overload current (Ir): 175-250 A, I²t characteristic
• Adjustable short-circuit release (Ii): 1250-2500 A (5...10 x In)
• Neutral conductor protection: 100% (InN = 250 A)
• Switching capacity class: M
• Insulation voltage (Ui): 800 V
• Rated operating voltage: 690 V AC / 600 V DC
• Short-circuit breaking capacity (Icu): 85 kA @ 240V; 55 kA @ 415V; 36 kA @ 440V; 15 kA @ 500V; 10 kA @ 690V
• Service breaking capacity (Ics): 85 kA @ 240V; 55 kA @ 415V; 36 kA @ 440V; 10 kA @ 500V; 5 kA @ 690V
• Short-circuit making capacity (Icm) at 415 V: 121 kA
• Operational current vs. ambient: 250 A up to 50 °C; 243 A @ 55 °C; 230 A @ 65 °C; 223 A @ 70 °C
• Connections: Front terminals, nut keeper kit on both ends; silver-plated contact surfaces (top + bottom)
• Flat-bar conductor range: 13 x 1 mm to 25 x 8 mm
• Power loss: 57 W maximum / 19 W per pole (AC, hot operating state)
• Mechanical service life: 20,000 operating cycles
• Electrical endurance (AC-1): 8,000 cycles @ 380/415 V; 5,400 cycles @ 690 V
• IP protection: IP40 (front)
• Dimensions (H × W × D): 158 × 140 × 70 mm (6.22 × 5.51 × 2.76 in)
• Net weight: 2.078 kg
• Ambient temperature during operation: -25 to +70 °C
• Storage temperature: -40 to +80 °C
• Approvals: General Product Approval; EMC; CCS (China Classification Society); Maritime application; environmental confirmations
• Standards: IEC 60947-2
• EAN/GTIN: 4042948816004

Features and benefits:

• TM240 thermal-magnetic overcurrent release with independent adjustment of overload (Ir) and short-circuit (Ii) trip values
• 100% neutral conductor protection - suitable for circuits with high harmonic content and 4-pole switching of TN-S systems
• Silver-plated front terminals + nut keeper kit on both ends - reliable, low-resistance bar/cable connections
• Motor operator-ready: optional motor drive accessory available for remote switching
• Wide -25 to +70 °C operating range with documented derating curve
• Maritime, EMC and CCS approvals - suitable for shipboard and certified industrial applications

Applications:

• Main and feeder protection on 4-wire TN-S distribution systems up to 250 A
• Industrial sub-distribution boards requiring 100% neutral protection
• Generator and transformer outgoing protection in commercial and industrial plants
• Maritime and shipboard electrical systems requiring CCS / type-tested certification

Also known as: Siemens 3VA1225-5GF42-0AA0, SENTRON 3VA1 4P 250A MCCB, Siemens IEC Frame 250 molded-case circuit breaker, 3VA1 TM240 250A 4-pole.