The Siemens 3VA2063-7HL46-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for 63 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed in a warm cabinet. It carries an ETU320 electronic trip unit, which gives you adjustable overload and short-circuit protection curves rather than fixed thermal-magnetic. Four poles handle three-phase plus neutral or a second protected phase, depending on your distribution scheme.
Breaking capacity and selectivity
Breaking capacity is the headline number here — 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 3 kA at 690 V. That 330 kA at 240 V tells you this breaker is sized for high-fault installations like large transformer secondaries or service entrances where the available fault current is serious. The drop to 3 kA at 690 V means it's not your go-to for 690 V distribution unless the fault current is very low — check your SCCR study before specifying.
Trip unit and protection
The ETU320 is an electronic trip unit — that means you get adjustable long-time pickup and delay, short-time pickup and delay, and instantaneous settings, plus ground-fault capability if the breaker is fitted with the right accessory (this one ships without ground-fault monitoring, per the evidence). The 63 A rated continuous current holds steady through the whole -25 °C to 70 °C operating range, so you don't have to derate for a hot summer day in a non-climate-controlled panel.
Mounting and dimensions
The breaker measures 140 mm wide, 181 mm high, and 86 mm deep. That 86 mm depth is the dimension you need to check against your enclosure depth — it's not a deep MCCB, so it fits most standard distribution panels without a deep-can extension. Four-pole width at 140 mm means it takes up the same rail space as two standard single-pole breakers side by side. IP40 on the front is typical for indoor panel mounting; no special sealing needed for dry environments.