Siemens 3LD2103-1TP51 Disconnector Switch

Siemens SENTRON 3LD2103-1TP51 is a three-pole switch disconnector designed for front-mounted isolation in low-voltage panels. It has a continuous current rating (Iu) of 25 A and can interrupt up to 9.5 kW at 400 V AC-23, making it suitable as a main disconnect or safety switch in industrial control schemes. The rotary operating mechanism is paired with a black, front-mounted handle and four-bolt mounting, and the unit carries an IP65 rating from the front for dust and water ingress protection. Each 3LD2103-1TP51 provides 1 normally closed (NC) and 1 normally open (NO) auxiliary contact, enabling basic signaling and control interlocks alongside power isolation. This model is part of the SENTRON 3LD family of switch disconnectors, optimized for compact 3-pole installations where reliable isolation and straightforward installation are required. Use cases include deploying as the main power switch in distribution panels, safety isolation during maintenance, or as a control-access switch in machinery enclosures, offering robust performance in 400 V systems with up to 25 A continuous current and consistent, code-compliant isolation in everyday industrial use.