The Siemens SENTRON is a robust 3-pole emergency switching-off switch designed for reliable disconnection in critical applications. This switch disconnector features molded plastic encapsulation for metric cable gland with integrated auxiliary contacts (1 NC, 1 NO) and a distinctive red/yellow rotary operating mechanism, making it ideal for emergency stop applications where immediate circuit isolation and status feedback are required with enhanced environmental protection.
Key Features
Technical Specifications
Compliance & Certifications
Applications Perfect for industrial applications requiring emergency disconnection with environmental protection and status feedback, including:
Package Information
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| Colour control element | Red |
| Compliance/Standards | UL 60947-4 |
| country_of_origin | Germany |
| Degree of protection (IP), front side | IP65 |
| Degree of protection (NEMA) | Other |
| Depth | 117 mm |
| description | SENTRON, Switch disconnector 3LD, emergency switching-off switch, 3- pole, Iu: 16 A, operating power / at AC-23 A 400 V: 7.5 kW, Molded plastic encapsulation for metric cable gland, 1 NC, 1 NO, rotary operating mechanism, red/yellow |
| Device construction | Built-in device fixed built-in technique |
| Height | 152 mm |
| Interlockable | Yes |
| IP Rating | IP65 |
| IP Rating Detailed | IP65 degree of protection NEMA rating 1, 4X, 12 protection class IP on the front IP65 Dissipation power loss |
| Max Frequency | 501 /h |
| Max. rated operation voltage Ue AC | 690 V |
| Number of auxiliary contacts as normally closed contact | 1 |
| Number of auxiliary contacts as normally open contact | 1 |
| Number of poles | 3 |
| Number of switches | 1 |
| Part Depth (mm) | 122,00mm |
| Part Height (mm) | 163,00mm |
| Part Width (mm) | 105,00mm |
| Rated operation power at AC-23, 400 V | 8 kW |
| Rated operation power at AC-3, 400 V | 6 kW |
| Rated permanent current at AC-21, 400 V | 16 A |
| Rated permanent current at AC-23, 400 V | 16 A |
| Rated permanent current Iu | 16 A |
| Rated short-time withstand current lcw | 0.34 kA |
| Suitable for front mounting centre | Yes |
| Type of control element | Short thumb-grip |
| Type of electrical connection of main circuit | Frame clamp |
| Version as emergency stop installation | Yes |
| Version as main switch | Yes |
| Version as maintenance-/service switch | Yes |
| Version as safety switch | Yes |
| Weight (g) | 0,424 Kg |
| Width | 100 mm |
| Width in number of modular spacings | 3 |
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