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Siemens 3LD2003-1TP51 3-Pole Main Switch, 1NC+1NO, 16A

Siemens 3LD2003-1TP51 3-Pole Main Switch with Aux Contacts

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ManufacturerSiemens

Part number3LD2003-1TP51

Series SENTRON 3LD

Poles 3

Rated Current (Iu) 16 A

Operating Power (AC-23A 400V) 7.5 kW

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Main switch function with auxiliary contacts 3-pole configuration 16A current rating 7.5kW power capacity 1 NC + 1 NO auxiliary contacts Front-mounted rotary operation

Product description

The Siemens 3LD2003-1TP51 is a SENTRON series 3-pole switch disconnector functioning as a main switch, equipped with auxiliary contacts. It has a rated operational current (Iu) of 16 A and an operating power of 7.5 kW at AC-23 A and 400 V. This model features 1 Normally Closed (NC) and 1 Normally Open (NO) auxiliary contact, with a black front-mounted rotary operating mechanism and 4-hole handle mounting.

This switch disconnector provides both main circuit isolation and integrated auxiliary contacts for signaling or control purposes. It is ideal for applications requiring simultaneous disconnection of the main power and activation of control or monitoring circuits.

Stanlo Automation, a veteran-owned distributor, offers this versatile Siemens switch disconnector. Enhance your control panel's functionality and safety with this integrated solution, readily available from our stock.

Technical specifications

Series	SENTRON 3LD
Poles	3
Rated Current (Iu)	16 A
Operating Power (AC-23A 400V)	7.5 kW
Auxiliary Contacts	1 NC, 1 NO
Mounting	Front-mounted
Operation	Rotary, Black Handle, 4-hole

Common applications

Control panels

Automation systems

Machine control

Status monitoring

Load isolation with signaling

Building automation

Compatible systems

Siemens Switch Disconnector Systems

Also known as

Siemens 3LD2003-1TP51 Siemens 16A main switch with aux SENTRON switch disconnector 1NC 1NO Rotary switch 3LD2003 auxiliary

Replaces / compatible with

This switch disconnector serves as a main isolating switch and provides integrated auxiliary contacts for signaling or interlock functions in control systems.

Technical note

Expert tip

Ensure the auxiliary contacts are properly wired to external control circuits before energizing the main power circuit to prevent unintended operations.

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Frequently asked questions

What type of auxiliary contacts are included with the Siemens 3LD2003-1TP51 switch disconnector?

The Siemens 3LD2003-1TP51 switch disconnector is equipped with one Normally Closed (NC) and one Normally Open (NO) auxiliary contact. These contacts can be wired for various control and signaling purposes within an automation system.