The Siemens 3LD2814-0TK51 Main Control and Emergency Stop Switch is a high-performance switch disconnector designed to provide safe isolation, reliable power control, and emergency shutdown functionality in industrial electrical systems. As part of the renowned Siemens SENTRON 3LD2 Series, this switch combines robust engineering, operational safety, and long-term reliability, making it an ideal choice for industrial control panels, power distribution systems, machinery installations, and automation applications.
Engineered to meet the demanding requirements of modern industrial environments, the 3LD2814-0TK51 functions as both a main control switch and an emergency stop switch, ensuring safe disconnection of electrical equipment during maintenance, servicing, or emergency situations. Siemens 3LD2 switch disconnectors are manually operated devices designed in accordance with international standards for switch disconnectors and emergency shutdown applications.
The Siemens 3LD2814-0TK51 is a 3-pole switch disconnector rated at 125A, offering dependable switching performance for industrial power distribution systems. Siemens specifies an operational power rating of 45 kW at AC-23A, 400V, making the switch suitable for motor loads, machinery control circuits, and industrial distribution networks.
One of the key advantages of the 3LD2814-0TK51 is its door-coupling rotary operating mechanism, which allows safe operation from the outside of an electrical enclosure. This design enables operators to isolate equipment without opening the control cabinet, significantly improving personnel safety and reducing exposure to energized components. Siemens identifies this model as a floor-mounted switch with a door-coupling mechanism specifically designed for industrial control applications.
The switch features a durable construction and a high protection rating of IP65 on the front, ensuring reliable operation in challenging industrial environments where dust, moisture, and contaminants may be present. This level of protection makes the 3LD2814-0TK51 suitable for manufacturing plants, processing facilities, utility installations, infrastructure projects, and outdoor control panels.
A significant benefit of the Siemens 3LD2814-0TK51 is its ability to provide safe isolation during maintenance procedures. In accordance with industrial safety practices, the switch enables complete disconnection of electrical circuits, helping protect personnel and equipment during servicing operations. The 3LD2 series is widely used as a main switch, repair switch, and emergency stop device across numerous industrial sectors.
The 3LD2814-0TK51 also offers excellent electrical performance. It supports operating voltages up to 690V AC and delivers reliable switching capabilities for demanding motor control and distribution applications. With a rated short-time withstand current of 2000A for 1 second, the switch provides enhanced durability and fault resistance in industrial power systems.
Typical applications include:
The Siemens 3LD2 series is also approved for use as a manual motor controller and motor disconnect solution, providing additional flexibility for machine builders and panel manufacturers.
At SB Smart (SBSmart.in), we provide genuine Siemens electrical and industrial automation products designed to meet the highest standards of safety, quality, and reliability. The Siemens 3LD2814-0TK51 Main Control and Emergency Stop Switch supplied by SB Smart ensures authentic Siemens performance and long-term operational dependability.
Whether you are designing a new power distribution system, upgrading an industrial control panel, or implementing a reliable emergency stop solution, the Siemens 3LD2814-0TK51 offers the performance, protection, and safety required for critical industrial applications. Backed by Siemens engineering excellence, it remains a trusted choice for professionals worldwide.
| Specification | Details |
|---|---|
| Product Name | Main Control & Emergency Stop Switch |
| Part Number | 3LD2814-0TK51 |
| SKU | 3LD2814-0TK51 |
| Brand | Siemens |
| Product Family | SENTRON 3LD2 |
| Product Type | Switch Disconnector |
| Number of Poles | 3 Pole |
| Rated Current (Iu) | 125 A |
| Rated Operational Voltage | 690 V AC |
| Operating Frequency | 50/60 Hz |
| Operating Power at AC-23A, 400V | 45 kW |
| Operating Power at AC-23A, 690V | 37 kW |
| Operating Power at AC-3, 400V | 37 kW |
| Operating Power at AC-3, 690V | 30 kW |
| Mounting Type | Floor Mounting |
| Operating Mechanism | Door-Coupling Rotary Handle |
| Front Protection Rating | IP65 |
| Short-Time Withstand Current (Icw) | 2000 A / 1 sec |
| Application | Main Switch & Emergency Stop |
| Standard Compliance | IEC 60947-3 |
| Manufacturer | Siemens |
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