✅ ABB Emax E1.2 Fixed Part – 1600A – 3-Pole – Withdrawable HR/HR Version – (Part No.: 1SDA073907R1) The ABB 1SDA073907R1 is the fixed part of the Emax E1.2 series withdrawable air circuit breaker, configured for 3-pole systems with a rated uninterrupted current (Iu) of 1600A. This HR/HR version offers high-reliability connection on both the primary and secondary sides, ensuring durable performance in critical power distribution networks. It is commonly integrated in main switchboards and control panels requiring fast circuit breaker withdrawal for service or replacement without system downtime. This base is compatible with E1.2 W (withdrawable) ACBs and supports seamless operation with front access and high safety standards. Technical Specifications: Part Number: 1SDA073907R1 Model: E1.2 W FP Rated Current (Iu): 1600A Poles: 3P Version: HR/HR (High Reliability, primary & secondary) Breaker Type Compatibility: Emax E1.2 Mounting: Withdrawable base in switchgear panels Application: High-reliability industrial and commercial power distribution