The Siemens SENTRON 3VA2063-5HL36-0CA0 is a 3-pole molded case circuit breaker (MCCB) rated for 63 A continuous current at ambient temperatures up to 70 °C without derating — the full 63 A holds from 40 °C through 70 °C. Breaking capacity reaches 187 kA at 240 V AC, 121 kA at 415/440 V, 75.6 kA at 500 V, and 3 kA at 690 V. The insulation voltage is rated 800 V. This is a line-protection design (not motor-protection or ground-fault), fitted with an undervoltage release (UVR) as the auxiliary release.
What the ratings mean for fit
The 63 A continuous rating is flat across the full 40–70 °C ambient range — no summer derating to track. That simplifies panel sizing: the breaker carries its nameplate current regardless of enclosure heat rise up to 70 °C. The 187 kA at 240 V is the highest interrupting rating on the voltage ladder; at common industrial distribution voltages (415/440 V) it still delivers 121 kA, which covers most transformer-fed fault levels below 2 MVA. At 690 V the rating drops to 3 kA — this breaker is not intended for 690 V distribution. The 800 V rated insulation voltage confirms it can be applied on 480/600 V class systems with adequate clearance.
Undervoltage release and integration
The integrated undervoltage release (UVR) trips the breaker when control voltage drops below a threshold — standard on this order code. No separate UVR module to purchase or wire. The breaker itself is 105 mm wide, 181 mm tall, 86 mm deep, fitting standard SENTRON panel cutouts. No communication function, no ground-fault monitoring, no trip indicator. Power loss is 7.9 W maximum at rated current.