Siemens ED43B070 Three-Phase Circuit Breaker 480 VAC

Siemens ED43B070 is a three-pole molded‑case circuit breaker in the ED4 family, rated for 480 VAC operation and 70 A. It provides short‑circuit protection with an 18 kA interrupting capacity at 480 V and uses a thermal‑magnetic trip to safeguard downstream equipment in three‑phase power systems. This 70‑amp, 3P device is designed for use as either a main or feeder protection device in industrial panels and switchgear that distribute 480 VAC power. Variants such as ED43B070BP and ED43B070L illustrate common termination options (bolt‑on and load‑side lug), so confirm the exact configuration for your enclosure. As part of Siemens’ low‑voltage molded‑case lineup, ED43B070 delivers reliable overcurrent protection in commercial and light industrial applications, with the standard ED frame footprint and mounting used in compatible Siemens panels. For installations in hotter environments or where higher fault currents are anticipated, the 18 kAIC rating at 480 V provides a robust safety margin for feeders feeding motors and drives, contactors, and other three‑phase loads. Verify termination style, panel compatibility, and regional catalog codes to ensure you select the correct version for your installation.