The Siemens 3LD2164-0TB51 Switch Disconnector is a high-performance industrial switching device engineered for safe electrical isolation, dependable power control, and long-term operational reliability. As part of the globally trusted Siemens SENTRON 3LD2 Series, this switch disconnector is designed to provide secure circuit isolation and reliable switching performance for industrial control panels, motor control centers, machinery installations, OEM equipment, and power distribution systems. Its rugged enclosed construction and proven Siemens engineering make it an ideal choice for demanding industrial applications.
The Siemens 3LD2164-0TB51 is a 3-pole main switch disconnector rated at 25A with an operational power rating of 9.5 kW at AC-23A, 400V. The unit is supplied in a durable molded-plastic enclosure designed for metric cable gland installation and features a black rotary operating mechanism. Siemens specifically classifies this model as a main switch, making it suitable for industrial power isolation, maintenance switching, and machine safety applications.
One of the key advantages of the 3LD2164-0TB51 Switch Disconnector is its ability to provide safe and visible electrical isolation. During maintenance, servicing, and repair operations, the switch enables operators to disconnect power quickly and securely, helping protect both personnel and equipment. Siemens confirms that this model is suitable for use as:
These capabilities make it a versatile solution for industrial automation, electrical distribution, and machinery control applications.
The switch features a short rotary operating mechanism with a black handle and clearly marked ON (1) and OFF (0) positions. This simple and intuitive design allows operators to quickly identify switch status and perform switching operations with confidence. The robust rotary mechanism ensures smooth operation while supporting long-term durability in industrial environments.
A major benefit of the Siemens 3LD2164-0TB51 is its rugged molded-plastic enclosure. The enclosure protects internal switching components from environmental influences while improving operator safety. Designed for industrial installations, the enclosure supports metric cable gland entry and provides secure housing for reliable operation in demanding applications.
Environmental protection is another significant advantage. The switch carries an IP65 protection rating, providing excellent resistance against dust ingress and water exposure. This protection level makes the device suitable for manufacturing facilities, processing plants, utility infrastructure, machinery installations, and other environments where durability and reliability are essential.
The 3LD2164-0TB51 is designed for long service life and dependable performance. Siemens specifies a mechanical endurance of up to 100,000 operating cycles, ensuring reliable operation throughout years of industrial use. The switch also offers strong electrical performance with a rated operational voltage of 690V AC, surge voltage resistance of 6kV, and a short-time withstand current rating of 640A for 1 second. These characteristics help support system reliability and protection under demanding operating conditions.
Another important feature is support for lockout/tagout (LOTO) procedures. The switch can be secured in the OFF position, allowing maintenance personnel to safely isolate electrical equipment during servicing. This functionality helps improve workplace safety and supports compliance with industrial maintenance practices.
At SB Smart (SBSmart.in), we supply genuine Siemens electrical and industrial automation products sourced through trusted supply channels. The Siemens 3LD2164-0TB51 Switch Disconnector ensures authentic Siemens quality, dependable performance, and long-term reliability for mission-critical industrial applications.
Whether you are building a new electrical panel, upgrading an existing power distribution system, or implementing a safe isolation solution, the Siemens 3LD2164-0TB51 delivers the safety, durability, and operational confidence expected from Siemens SENTRON products.
| Specification | Details |
|---|---|
| Product Name | Main Control Switch / Switch Disconnector |
| Part Number | 3LD2164-0TB51 |
| SKU | 3LD2164-0TB51 |
| Brand | Siemens |
| Product Family | SENTRON 3LD2 |
| Product Type | Switch Disconnector |
| Design | Main Switch |
| Number of Poles | 3 Pole |
| Rated Current (Iu) | 25 A |
| Operating Power AC-23A at 400V | 9.5 kW |
| Operating Power AC-23A at 690V | 9.5 kW |
| Operating Power AC-3 at 400V | 7.5 kW |
| Operating Power AC-3 at 690V | 7.5 kW |
| Rated Operational Voltage | 690 V AC |
| Insulation Voltage (Ui) | 690 V |
| Surge Voltage Resistance | 6 kV |
| Enclosure Type | Molded Plastic Enclosure |
| Cable Entry | Metric Cable Gland |
| Operating Mechanism | Short Rotary Knob |
| Handle Type | Black Rotary Handle |
| Position Indicator | 1 ON – 0 OFF |
| Protection Rating | IP65 |
| Operating Temperature | -25°C to +55°C |
| Short-Time Withstand Current (Icw) | 640 A / 1 sec |
| Mechanical Life | Up to 100,000 Operations |
| Lockable in OFF Position | Yes |
| Mounting Type | Complete Unit in Enclosure |
| Application | Main Switch, Safety Switch & Maintenance Isolation |
| Standards Compliance | IEC 60947-3 |
| Manufacturer | Siemens |
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