The adjustable thermal-magnetic trip unit covers 20–100 A, letting you dial the protection to match the downstream load without swapping the breaker. That 100 A full-scale setting is the value that governs the BOM line — the breaker is rated for a 100 A circuit, not a 150 A minimum. Interrupting capacity is the headline number for SCCR coordination: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3 kA at 690 V.
The built-in communication function and the supplied basic switch (order code 3VA20105JQ320AA0) are factory-integrated, so the breaker arrives ready for status monitoring without field wiring of separate aux contacts.
Three-pole MCCB, 105 mm wide — that's a standard SENTRON mounting footprint. Maximum power loss is 16 W, so the heat load is modest for a 100 A breaker. No forced ventilation required in a typical panel; just standard thermal spacing per Siemens mounting guidelines. That covers unheated warehouses and outdoor enclosures in most climates.