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Siemens 3LD2504-1TP51 SENTRON 3-Pole Main Switch with Aux Contacts

Siemens SENTRON 3LD 3-pole 63A main switch with 1 NC/1 NO aux contacts.

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ManufacturerSiemens

Part number3LD2504-1TP51

Poles 3

Rated Operational Current (Iu) 63 A

Operating Power (AC-23A, 400V) 22 kW

Mounting Front-mounted

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3-pole main switch 63A current rating Front-mounted design Rotary operating mechanism Includes 1 NC and 1 NO auxiliary contacts 4-hole handle mounting

Product description

The Siemens 3LD2504-1TP51 is a SENTRON 3LD series switch disconnector, functioning as a 3-pole main switch. It has a rated operational current (Iu) of 63 A and an operating power of 22 kW at AC-23 A and 400 V. This front-mounted model features a black rotary operating mechanism, 4-hole handle mounting, and includes 1 normally closed (NC) and 1 normally open (NO) auxiliary contacts.

This switch is ideal for main power control and isolation in industrial settings, offering auxiliary contacts for status signaling or interlock circuits. Applications include motor control, control panels, and power distribution where monitoring of the switch state is necessary.

Stanlo Automation, a veteran-owned supplier of surplus industrial automation parts, offers the Siemens 3LD2504-1TP51. We provide reliable access to quality components, ensuring your automation systems remain operational and efficient.

Technical specifications

Poles	3
Rated Operational Current (Iu)	63 A
Operating Power (AC-23A, 400V)	22 kW
Mounting	Front-mounted
Operation	Rotary
Auxiliary Contacts	1 NC, 1 NO
Handle Mounting	4-hole
Color	Black

Common applications

Main power disconnect

Motor control with signaling

Industrial automation

Control panels

Power distribution

Switchgear with status feedback

Compatible systems

Industrial control panels Motor control systems Power distribution with signaling Automation systems requiring status feedback

Also known as

Siemens 3LD main switch aux 3LD2504-1TP51 disconnect Siemens 63A main switch with contacts SENTRON rotary disconnect

Replaces / compatible with

This 63A 3-pole main switch disconnector with auxiliary contacts can replace older Siemens 3LD series models or other compatible disconnectors requiring status signaling. Verify fit and function.

Technical note

Expert tip

The integrated auxiliary contacts simplify wiring for control and monitoring circuits, reducing the need for separate auxiliary contact blocks.

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Frequently asked questions

What is the purpose of the auxiliary contacts on the Siemens 3LD2504-1TP51?

The 1 NC and 1 NO auxiliary contacts on the Siemens 3LD2504-1TP51 can be used for external signaling. For example, they can indicate the switch's position (ON/OFF) to a PLC or trigger interlocks in a control system.