Siemens SENTRON 3VA1110-6FD46-0AA0 — 100 A 4-Pole MCCB, Line Protection
The Siemens SENTRON 3VA1110-6FD46-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated for 100 A continuous current (Iu) and configured for line protection. It carries a TM210 thermal-magnetic overcurrent release. Breaking capacity is the headline: 220 kA at 240 V AC, 154 kA at 415 V, and 121 kA at 440 V. At 500 V and 690 V it still holds 17 kA. That 220 kA figure at 240 V puts it into high-fault-current territory — suitable for service-entrance or large sub-distribution boards where the available fault current exceeds 100 kA. The 4-pole construction (switching all three phases plus neutral) is required for TN-S or TT systems where the neutral is switched, or for generator paralleling applications. Rated insulation voltage is 800 V, and the maximum operational DC voltage is 600 V. The front face carries an IP40 protection class — suitable for indoor panel mounting where no water ingress is expected. Dimensions are 101.6 mm wide, 130 mm high, and 70 mm deep, fitting standard SENTRON 3VA panel cutouts and busbar systems.
Thermal Derating and Endurance
The 100 A rating holds flat from 40 °C to 50 °C ambient. Above that, derate linearly: 98 A at 55 °C, 96 A at 60 °C, 94 A at 65 °C, and 91 A at 70 °C. In a sealed, uncooled panel near other heat sources, that 91 A at 70 °C is the real-world limit — not the nameplate 100 A. Mechanical endurance is rated at 20,000 operations, which is typical for a distribution MCCB in a panel that sees infrequent switching (a few cycles per month). Maximum power loss is 25 W. That's the heat the breaker dumps into the enclosure — relevant for thermal simulation of a multi-breaker panel. Storage temperature range is -40 °C to 80 °C; operating range is -40 °C to 70 °C. The N-conductor protection is set at 50% of the phase rating, which is the standard for harmonic-rich loads (e.g., VFD-fed systems with significant triplen harmonics on the neutral).