What this part is and what it does
The Siemens SENTRON 3VA1010-3ED46-0AA0 is a 4-pole molded case circuit breaker (MCCB) designed for line protection, with a TM210 thermal-magnetic overcurrent release. At 40 °C it carries 100 A continuous, derating to 91 A at 70 °C. Breaking capacity hits 75.6 kA at 240 V AC, 52.5 kA at 415 V, and holds 7.5 kA up to 690 V — solid fault-clearing headroom for most industrial distribution panels.
What the ratings mean for your panel
The 100 A rating at 40 °C is the continuous current you can pull through the breaker without nuisance tripping. Above 55 °C you lose about 2 A per 5 °C rise — at 70 °C it's 91 A, so if your panel runs hot, size the load accordingly. The 75.6 kA interrupting rating at 240 V tells you this breaker can safely clear a fault up to that level without welding contacts or venting arc gas — critical for high-fault utility feeds. The 4-pole design lets you switch all three phases plus neutral in a single unit, common in North American 480Y/277 V or European TN systems.
Panel integration and environment
The breaker measures 101.6 mm wide, 130 mm tall, 70 mm deep — fits standard panel-mount cutouts for 4-pole MCCBs. Front face carries IP40 protection (tools and fingers won't reach live parts), but the body is not sealed against washdown — keep it inside a cabinet. Storage range from -40 °C to 80 °C; operating range -25 °C to 70 °C. Maximum power dissipation is 25 W, so factor that into enclosure thermal calculations.