The Siemens 3LD2003-0TK53 is a SENTRON 3LD2 three-pole switch disconnector and emergency switching-off switch, designed for manual control, electrical isolation and emergency switching applications in industrial equipment. Siemens specifies this model with a 16 A uninterrupted current rating and 7.5 kW operational power at AC-23A, 400 V.
It features a front-mounted rotary operating mechanism with a red/yellow handle and four-hole handle mounting, making it suitable for machinery, control panels and industrial electrical installations.
Important: The product title you provided says “Auxiliary switch (1NO+1NC),” but 3LD2003-0TK53 is the main 3LD2 switch itself, not the auxiliary contact accessory. Siemens lists the 3LD2003-0TK53 under the basic devices, while auxiliary-switch versions/accessories are separate part numbers.
The Siemens 3LD2003-0TK53 can be used for:
The Siemens 3LD2003-0TK53 provides a compact manual switching and isolation solution for industrial electrical equipment. Its rotary operating mechanism provides a clear and accessible means of operating the switch, while the red/yellow handle is suitable for applications requiring a clearly identifiable emergency switching-off device.
With a 16 A rating and up to 7.5 kW at AC-23A, 400 V, the device can be selected for suitable industrial loads within its specified ratings. Siemens also specifies AC-3 operating capabilities for motor-related applications, subject to the applicable voltage and rating conditions.
For applications requiring auxiliary signalling, the appropriate 1NO + 1NC auxiliary contact accessory should be selected separately according to the exact 3LD2 configuration. Siemens documentation shows that some 3LD2 versions use separate auxiliary-contact accessories such as the 3LD9200 series.
Always verify the exact accessory compatibility, electrical ratings, mounting arrangement and machine safety requirements before installation.
SB Smart supplies Siemens industrial electrical and automation products across Faridabad, Delhi NCR, Noida, Gurgaon/Gurugram, Ghaziabad, Mumbai, Pune, Ahmedabad, Hyderabad, Bengaluru/Bangalore, Chennai, Jaipur, Chandigarh, Ludhiana, Kolkata and other major industrial locations across India.
The Siemens 3LD2003-0TK53 can be considered by panel builders, OEMs, machine manufacturers, electrical contractors, system integrators and industrial maintenance teams.
1. What is Siemens 3LD2003-0TK53?
It is a Siemens SENTRON 3LD2 three-pole switch disconnector/emergency switching-off switch with a 16 A uninterrupted current rating.
2. Is 3LD2003-0TK53 an auxiliary switch?
No. 3LD2003-0TK53 is the main switch disconnector. A 1NO+1NC auxiliary contact is a separate accessory/configuration.
3. What is the current rating of 3LD2003-0TK53?
The uninterrupted current rating is 16 A.
4. What is its operational power at 400 V AC?
Siemens specifies 7.5 kW at AC-23A, 400 V.
5. Where can it be used?
It can be used for industrial machinery, control panels, manual switching, isolation and emergency switching-off applications, subject to correct selection and installation.
6. Is it suitable for panel mounting?
Yes. The product is specified as a front-mounted rotary switch with four-hole handle mounting.
| Specification | Details |
|---|---|
| Product Name | Emergency Switching-Off Switch |
| Part Number | 3LD2003-0TK53 |
| SKU | 3LD2003-0TK53 |
| Brand | Siemens |
| Product Family | SENTRON 3LD2 |
| Product Type | Switch Disconnector |
| Function | Emergency Stop Switch |
| Number of Poles | 3 Pole |
| Rated Current (Iu) | 16 A |
| Operating Power AC-23A at 400V | 7.5 kW |
| Rated Operational Voltage (Ue) | 690 V AC |
| Mounting Type | Front Mounted |
| Operating Mechanism | Rotary Operating Mechanism |
| Handle Type | Red / Yellow Rotary Handle |
| Position Indicator | 0 – 1 |
| Protection Rating | IP65 |
| Face Dimensions | 67 x 67 mm |
| Mounting Hole Diameter | Ø5 mm |
| Operating Temperature | -25°C to +55°C |
| Lockable in OFF Position | Yes |
| Connection Type | Box Terminal |
| Application | Emergency Stop & Safety Isolation |
| Standards Compliance | IEC 60947-3 |
| Manufacturer | Siemens |
No reviews yet.