What this MCCB is and what the ratings mean for fit
The Siemens 3VA1116-4ED46-0AA0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection — the primary role is feeding a bus or a downstream distribution panel, not individual motor circuits. Its 4-pole configuration (3 phases + neutral) suits three-phase systems where the neutral needs overcurrent protection, common in North American and some IEC commercial installations. Rated 160 A continuous at 40 °C, it holds that rating up to 50 °C, then derates to 150 A at 70 °C — the thermal curve is flat across the typical panel ambient, so no headroom padding needed for most enclosures. The TM210 trip unit is a fixed thermal-magnetic type: the thermal element handles overloads (inverse-time), the magnetic element handles short-circuits (instantaneous). No electronic adjustment, no ground-fault module — it's a workhorse for standard distribution. Breaking capacity is the key fit parameter: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 500 V and 690 V. That 121 kA at 240 V is a high-interrupting rating — it handles faults right at the transformer secondary or a high-capacity bus without cascading upstream. At 690 V the 11.9 kA is modest; verify the available fault current at that voltage level before specifying.
Mounting and panel integration
The 3VA1116-4ED46-0AA0 measures 130 mm high, 101.6 mm wide, and 70 mm deep. Rated insulation voltage is 800 V, so it's rated for 690 V systems with margin. Maximum power loss is 38 W — factor that into your enclosure thermal calculation if you're stacking multiple breakers in a sealed box.