The Siemens 3LD2804-0TK53 Main Control and Emergency Stop Switch is a premium industrial switch disconnector designed to provide safe isolation, emergency shutdown functionality, and dependable power control in demanding electrical installations. As part of the highly trusted Siemens SENTRON 3LD2 Series, this emergency switching-off switch combines robust engineering, high operational reliability, and advanced safety features, making it an ideal solution for industrial control panels, power distribution systems, OEM machinery, and automation applications.
The 3LD2804-0TK53 is specifically configured as a 3-pole emergency stop switch with a rated operational current of 125A and an operational power rating of 45 kW at AC-23A, 400V. Designed for front mounting, it features a red/yellow rotary operating mechanism that provides clear visual identification during normal operation and emergency shutdown situations. This makes the switch highly suitable for safety-critical applications where rapid isolation of electrical equipment is essential.
One of the key advantages of the Siemens 3LD2804-0TK53 is its dedicated EMERGENCY-OFF functionality. During maintenance procedures, equipment servicing, or unexpected operational conditions, the switch enables immediate disconnection of electrical circuits, helping protect personnel, machinery, and electrical infrastructure. Siemens confirms that this model is suitable for use as an emergency-off switch, safety switch, maintenance switch, main switch, and switch disconnector.
The switch incorporates a front-mounted rotary operating mechanism with a short rotary knob and a highly visible red/yellow handle. This design improves operator safety by providing quick identification and easy operation, even in high-pressure emergency situations. The switch position is clearly indicated through a manual ON/OFF status display, ensuring enhanced visibility during operation.
A significant benefit of the 3LD2804-0TK53 Emergency Stop Switch is its rugged environmental protection. Siemens specifies an IP65 protection rating on the front, providing excellent resistance against dust, moisture, and industrial contaminants. Additionally, the switch meets NEMA 1, 3R, 4X, and 12 protection standards, making it suitable for harsh industrial environments and outdoor installations where reliability is critical.
The Siemens SENTRON 3LD2 Series is engineered for long-term durability. The 3LD2804-0TK53 offers a mechanical service life of up to 100,000 operating cycles, ensuring dependable operation over many years of industrial use. Its robust construction supports reliable switching performance under frequent operation and demanding electrical loads.
With a rated insulation voltage of 690V AC, surge voltage resistance of 6 kV, and a short-time withstand current of 2000A for 1 second, the switch provides excellent electrical endurance and protection against fault conditions. The unit also supports a conditional short-circuit current of 20 kA when protected by a suitable gG fuse, enhancing system safety and reliability.
Typical applications include:
The switch can also be locked in the OFF position, supporting lockout/tagout (LOTO) procedures and improving workplace safety during maintenance activities.
At SB Smart (SBSmart.in), we supply genuine Siemens electrical and industrial automation products that meet the highest standards of safety, performance, and reliability. The Siemens 3LD2804-0TK53 Emergency Stop Switch available from SB Smart ensures authentic Siemens quality and dependable operation for critical industrial applications.
Whether you are designing a new control panel, upgrading an electrical distribution system, or implementing a reliable emergency isolation solution, the Siemens 3LD2804-0TK53 delivers the safety, durability, and operational confidence expected from Siemens SENTRON products.
| Specification | Details |
|---|---|
| Product Name | Main Control & Emergency Stop Switch |
| Part Number | 3LD2804-0TK53 |
| SKU | 3LD2804-0TK53 |
| Brand | Siemens |
| Product Family | SENTRON 3LD2 |
| Product Type | Emergency Switching-Off Switch |
| Number of Poles | 3 Pole |
| Rated Current (Iu) | 125 A |
| Rated Operational Voltage | 690 V AC |
| Operating Frequency | 50/60 Hz |
| Operating Power AC-23A at 400V | 45 kW |
| Operating Power AC-23A at 690V | 37 kW |
| Operating Power AC-3 at 400V | 37 kW |
| Operating Power AC-3 at 690V | 30 kW |
| Mounting Type | Front Mounted |
| Handle Type | Red/Yellow Rotary Operating Mechanism |
| Switch Position | 1 ON – 0 OFF |
| Protection Rating | IP65 Front |
| NEMA Rating | 1, 3R, 4X, 12 |
| Insulation Voltage (Ui) | 690 V |
| Surge Voltage Resistance | 6 kV |
| Short-Time Withstand Current (Icw) | 2000 A / 1 sec |
| Mechanical Life | 100,000 Operations |
| Lockable in OFF Position | Yes |
| Application | Main Switch, Emergency Stop, Safety Switch |
| Weight | Approx. 0.48 – 0.49 kg |
| Manufacturer | Siemens |
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