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Siemens 3SE3120-1E Heavy-Duty Metal Enclosure Limit Switch (Interruptor de viaje)
Final de carrera de servicio pesado serie SIRIUS 3SE3 con carcasa metálica, equipado con contactos de acción rápida 1NO+1NC y actuador de palanca de rodillo. Clasificación IP67, Es adecuado para entornos industriales hostiles..
Explicación del código del modelo
| Segmento de código | Descripción |
| 3SE3 | Siemens SIRIUS series heavy-duty limit switch with metal enclosure |
| 120 | Modelo básico: 40mm wide housing, Pg13.5 cable gland, double-break snap-action contacts |
| -1mi | Actuator: Standard single roller lever, 1NO+1NC contact configuration |
Important Notice: Este modelo ha sido descatalogado.. The official replacement is 3SE5112-0CE01.
Especificaciones técnicas
| Artículo | Parámetro | Observaciones |
| Configuración de contacto | 1 Normalmente abierto (NO) + 1 Normalmente cerrado (CAROLINA DEL NORTE) | Double-break snap-action design |
| Corriente nominal / Voltaje | 10A / 500V y | AC-15: 2.5A / 400V |
| 10A / 600En DC | DC-13: 0.4A / 24V | |
| Mecanismo operativo | Single roller lever | Vida mecánica ≥ 10,000,000 operaciones |
| Material de la carcasa | Die-cast aluminium | Robust and impact-resistant |
| Protección de ingreso | IP67 | Dust-tight and water-resistant; temporary immersion permitted |
| Cable Entry | Pg13.5 cable gland | Suitable for cables with outer diameter 9-14mm |
| Tipo de montaje | Surface mounting / Montaje en carril DIN | Compatible with various mounting brackets |
| Temperatura ambiente | -25°C ~ +80°C | Adaptable to harsh working conditions |
| Estándares de cumplimiento | CEI 60947-5-1, EN 50041, VDE 0660 | Compliant with international industrial safety standards |
| Vida mecánica | ≥ 10,000,000 operaciones | Vida eléctrica ≥ 100,000 operations under rated load |
Lista de reemplazo entre marcas (Reemplazo directo)
| Marca | Modelo | Compatibilidad | Precio de Referencia (CNY) | Ventajas |
| siemens (Reemplazo) | 3SE5112-0CE01 | 100% | 450-550 | Official replacement, totalmente compatible |
| Electricidad Schneider | XCKN2118P16 | 95% | 380-480 | Identical contact configuration, IP67 rated |
| TEJIDO | LS31P11 | 90% | 350-420 | Cost-effective with global warranty |
| chint (Doméstico) | YBLX-ME/8108 | 90% | 120-180 | Competitive price, fast local delivery |
| Delicioso (Doméstico) | LXK3-20S/T | 85% | 100-150 | Economical choice for bulk replacement |
Common Models of 3SE3 Series
- Standard Roller Lever (1NO+1NC)
| Modelo | Actuator Description | Modelo de reemplazo |
| 3SE3120-1E | Single roller lever | 3SE5112-0CE01 |
| 3SE3120-1G | Dual roller lever | 3SE5112-0CE11 |
| 3SE3120-1H | Adjustable roller lever | 3SE5112-0CE21 |
- Other Actuator Types
| Modelo | Actuator Description | Configuración de contacto |
| 3SE3122-1E | Straight plunger | 1NO+1NC |
| 3SE3124-1E | Fork lever | 1NO+1NC |
| 3SE3126-1E | Adjustable fork lever | 1NO+1NC |
| 3SE3130-1E | Rotary lever | 1NO+1NC |
- Dual Contact Configuration (2NO+2NC)
| Modelo | Actuator Description | Configuración de contacto |
| 3SE3120-2E | Single roller lever | 2NO+2NC |
| 3SE3120-2G | Dual roller lever | 2NO+2NC |
Solución de problemas & Maintenance Guide
- Fallos comunes & Soluciones
| Fenómeno de falla | Posibles causas | Pasos de inspección | Soluciones |
| Contacts fail to operate | 1. Jammed lever | 1. Check smooth mechanical movement | 1. Remove foreign matters and lubricate the shaft |
| 2. Damaged return spring | 2. Test spring reset force | 2. Replace the spring | |
| 3. Worn contacts | 3. Measure contact resistance | 3. Replace contact assembly | |
| Contacto pegado | 1. Operación de sobrecarga | 1. Verify load against rated value | 1. Reduce load or select higher-capacity model |
| 2. Arc erosion | 2. Check contact surface for burn marks | 2. Replace contacts | |
| 3. Excessive dust accumulation | 3. Inspect sealing integrity | 3. Renew seals for better protection | |
| Unstable signal | 1. Cableado suelto | 1. Tighten terminal connections | 1. Retighten cables |
| 2. Contactos oxidados | 2. Measure contact resistance | 2. Clean contact surfaces | |
| 3. Vibración excesiva | 3. Check mounting tightness | 3. Add vibration damping measures |
- Periodic Maintenance Schedule
| Artículo de mantenimiento | Intervalo | Operación |
| Inspección visual | Mensual | Check housing damage and sealing condition |
| Mechanical Operation Test | Trimestral | Manually actuate the lever to ensure smooth movement |
| Contact Performance Test | Semi-annually | Measure contact resistance, ensure value ≤ 50mΩ |
| Limpieza & Lubricación | Annually | Remove internal dust; lubricate shafts with silicone grease |
| Seal Replacement | Cada 2 años | Replace cable glands and O-rings |
Solicitud & Casos de la industria
- Escenarios aplicables
Máquinas herramienta: Travel limit for worktables and position detection for cutting tools
Líneas de producción automatizadas: Conveyor positioning and workpiece detection
Equipo de elevación: Travel limit protection and anti-collision detection
Maquinaria de embalaje: Position control for cutting & sealing and roll tension detection
Industria metalúrgica: Position detection under high temperature (heat shield required)
- Non-Recommended Scenarios
Severely Corrosive Environments: Direct exposure to acid or alkaline solutions (stainless steel enclosure model recommended)
Explosive Hazardous Areas: Adopt explosion-proof limit switches of 3SE5 series
High-Precision Positioning: For accuracy within ±0.1mm, proximity switches or encoders are preferred
- Application Cases
Caso 1: Automotive Stamping Production Line
Solicitud: Travel limit protection for stamping press slides
Solución: Install 3SE3120-1E at upper and lower limit positions to cut off power when the slide reaches the limit
Result: Prevent equipment overload damage, improve operational safety; annual failure rate < 0.5%
Caso 2: Automated AS/RS Warehouse
Solicitud: Rail limit and cargo location detection for stackers
Solución: Mount 3SE3120-1E at rail ends and cargo positions to realize precise positioning and safety protection
Result: Improve automation level, reduce manual intervention; positioning accuracy up to ±5mm
- 3SE3 series features metal housing and IP67 protection; 1E stands for single roller lever with 1NO+1NC contacts.
- Choose metal enclosure for heavy-duty use, and plastic enclosure (3SE5) for light-duty applications.
- For the discontinued model, use 3SE5112-0CE01 as direct replacement.
- Domestic alternatives from Chint and Delixi cut costs by half while retaining around 90% actuación.
