This listing is for a used Siemens 3WL series air circuit breaker (ACB), model reference 3WL1 (3-pole), rated at 1600A maximum continuous current. The unit complies with IEC/EN 60947-2 and carries CE and CCC certifications. Key electrical specifications include: insulation voltage Ui = 1000V AC at 50/60Hz, impulse withstand voltage Uimp = 12kV, and operational voltage Ue up to 690V AC. Short-circuit breaking capacity Ics (=Icu) is rated at 100kA at 500V and 85kA at 690V, with short-time withstand current Icw at 0.5s equally rated at 100kA / 85kA respectively. The breaker is equipped with several auxiliary modules including a Shunt Trip (ST/F1) rated at DC 60V on terminals X6-13/X6-14, an Under Voltage Release (UVR/F3) rated at DC 60V on terminals X5-11/X5-12, a Reset coil (Reset/F7) on terminals X8-13/X8-14, and a Closing Coil (CC/Y1) rated AC 230V / DC 220V on terminals X6-7/X6-8. A motor operator (M) for AC 208-240V / DC 220-250V is fitted on terminals X5-1/X5-2. The spring mechanism indicator shows 'CHARGED'. The unit bears the plant tag '-SS3.Q3' and identity number 0004912811111155. Factory Q-Test 1, 2, and 3 passed labels are present on the rear. The breaker shows signs of use and surface soiling consistent with industrial service but appears mechanically and electrically intact with no visible damage to the housing or contacts. Suitable as a replacement or spare in industrial low-voltage switchgear panels, MCC or power distribution boards up to 1600A.