The Siemens 3VA1180-3EF42-0AA0-ZD00 is a 4-pole IEC frame 160 molded case circuit breaker rated for line protection. Its headline number is the 25 kA breaking capacity at 415 V (class N) — that's the fault current it can safely interrupt without welding its contacts or venting plasma into the panel. For a 415 V distribution board feeding motor control centers or lighting, that rating covers most downstream faults up to that level, so you don't cascade the trip upstream to the main breaker. The thermal-magnetic trip unit is a TM240 with ATAM (adjustable thermal, adjustable magnetic). Overload protection (Ir) is adjustable from 56 A to 80 A, and short-circuit protection (Ii) from 5 to 10 times In (400 A to 800 A). That range lets you dial in the trip curve for a specific load — say a 75 A continuous conveyor motor — without swapping the breaker body. The N conductor is unprotected on this variant, meaning the neutral pole is a switched-only pass-through with no overload or short-circuit sensing. That's standard for a 4-pole breaker feeding a balanced three-phase load where the neutral carries only imbalance current. The nut keeper kit is included for secure terminal tightening — a small detail that saves time during panel build.
Sourcing and lifecycle
Pricing and availability are confirmed at quote time against an RFQ. The -ZD00 suffix indicates a special OEM configuration for DC Power in China — that means the breaker carries a custom marking or accessory kit, not a different electrical rating. If your BOM calls for the standard 3VA1180-3EF42-0AA0 without the suffix, verify the OEM-specific differences before substituting.