Siemens E43B070U Three-Phase Contactor

Siemens ED43B070 three‑pole molded‑case circuit breaker (MCCB) delivers robust overload and short‑circuit protection for three‑phase feeders. Rated for 480 V AC and continuous current up to 70 A, it provides 18 kA interrupting capacity at 480 V, making it suitable for moderate‑power industrial circuits and motor feeds. This ED4 series device is designed for bolt‑on mounting in compatible panels and is offered with load‑side lug terminals for secure, high‑current connections. The unit incorporates thermal‑magnetic trip elements with long‑time and instantaneous trip functions to rapidly clear faults while limiting nuisance trips. In typical installation environments, the ED43B070 supports a wide ambient temperature range, from −25°C to 75°C, and is rated for standard industrial switching duties. Common applications include protection of three‑phase distribution feeders, motor starters, and machine‑control circuits in industrial or commercial settings. The ED43B070 is cataloged within Siemens’ Sentron ED4 family of MCCBs and is represented by distributors such as DigiKey, Grainger, and Rexel in current inventories.