SENTRON 3VA1120-6GD46-0AA0 — 20 A 4-Pole MCCB with TM210 Release
The Siemens SENTRON 3VA1120-6GD46-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated at 20 A continuous current, built around the TM210 thermal-magnetic release for line protection in distribution panels and motor branch circuits. Its interrupting capacity reaches 220 kA at 240 V AC, 154 kA at 415 V, and 121 kA at 440 V — figures that cover most industrial fault-current scenarios downstream of a transformer or generator main. At 690 V the rating drops to 17 kA, and the same 17 kA applies at 500 V, so for 690 V applications verify the available fault current stays within that ceiling. The TM210 release has an adjustable short-circuit pickup up to 320 A (li max), giving flexibility to coordinate with downstream breakers or motor starters without changing the breaker frame.
Thermal Performance and Derating
The 3VA1120-6GD46-0AA0 carries its full 20 A rating from 45 °C through 55 °C ambient without derating — a solid margin for typical panel environments. Above 55 °C, the current rating steps down to 19 A at 60 °C, 65 °C, and 70 °C, so a panel running near its upper thermal limit loses only 1 A of headroom. Maximum power loss is 12 W at rated load — modest enough that forced ventilation is rarely needed in a standard enclosure.
Integration and Mounting
The breaker occupies a 101.6 mm wide, 130 mm tall, 70 mm deep footprint — standard for a 4-pole SENTRON 3VA frame — and mounts directly onto a DIN rail or panel-mount adapter. Front-face protection is IP40, suitable for enclosed distribution boards; the N-conductor is protected at 100 % rating, meaning the neutral pole is fully rated rather than switched-only. An optional motor drive accessory (Product Extension / Optional / Motor Drive: Yes) allows remote motorized operation for automated or inaccessible panels.
Electrical Ratings and Compliance
Rated insulation voltage is 800 V AC; maximum operational voltage on DC circuits is 600 V, so the breaker can serve DC bus or battery-bank applications within that limit. Operating ambient range spans -25 °C to +70 °C, with storage from -40 °C to +80 °C — the storage ceiling matters for warehouses or unheated staging areas. No communication function is built in; this is a standalone line-protection breaker, not a metering or trip-unit-communicating variant.