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Siemens 3LD2054-1TP51 3-Pole Main Switch Disconnector

Siemens 3LD2054-1TP51 SENTRON 3-pole main switch disconnector with aux contacts.

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ManufacturerSiemens

Part number3LD2054-1TP51

Type Switch disconnector

Manufacturer Siemens

Series SENTRON 3LD

Poles 3

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Main switch function 3-pole configuration Front-mounted rotary operation Includes 1 NC and 1 NO auxiliary contacts 16A rating

Product description

The Siemens 3LD2054-1TP51 is a 3-pole SENTRON switch disconnector functioning as a main switch. It is rated for 16 A with an operating power of 7.5 kW at AC-23 A and 400 V. This unit is front-mounted and equipped with a black rotary operating mechanism, and it includes 1 NC and 1 NO auxiliary contacts with a central 22.5 mm handle mounting.

This switch disconnector is suitable for main power isolation in industrial control panels, machinery, and distribution systems where a reliable means of disconnecting power is needed. The inclusion of auxiliary contacts allows for integration into control and signaling circuits.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 3LD2054-1TP51 to support your industrial automation needs. We pride ourselves on providing quality surplus components and exceptional service.

Technical specifications

Type	Switch disconnector
Manufacturer	Siemens
Series	SENTRON 3LD
Poles	3
Rated Current (Iu)	16 A
Operating Power (AC-23A, 400V)	7.5 kW
Mounting	Front-mounted
Handle Type	Rotary
Handle Color	Black
Auxiliary Contacts	1 NC, 1 NO
Handle Mounting	Central 22.5 mm

Common applications

Industrial control panels

Machinery isolation

Power distribution

Automation systems

Motor control

Signaling circuits

Compatible systems

Industrial control systems PLC input modules Automation panels

Also known as

Siemens 3LD2054 3LD2054-1TP51 main disconnect Siemens rotary switch with aux

Replaces / compatible with

This switch disconnector can replace Siemens 3LD series main switches or other 3-pole disconnectors with similar specifications and auxiliary contact requirements. Verify compatibility.

Technical note

Expert tip

The auxiliary contacts are easily accessible for wiring, making integration into control logic straightforward. Ensure correct wiring for intended signaling or interlocking functions.

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Frequently asked questions

What are the auxiliary contacts on the 3LD2054-1TP51 used for?

The auxiliary contacts (1 NC and 1 NO) on the Siemens 3LD2054-1TP51 are typically used for remote signaling or interlocking purposes. The normally closed (NC) contact can be used in series with control circuits to indicate the switch is off, while the normally open (NO) contact can signal that the switch is on.