Shihlin Electric S-P25 AC Contactor

The S-P25 AC Contactor from Shihlin Electric is a core component specifically designed for industrial control. It is suitable for motor starting, power transmission and distribution systems, and power control of various mechanical equipment. Below is its key information and application guide:

1. Parámetros técnicos básicos
2. Rated Load Capacity

Rango de voltaje: Covers 220-240V (AC3 class) and 380-440V (AC3 class), with corresponding powers of 6.5kW/8.5HP (220V) and 12kW/16HP (380V) respectively.

Current Specification: The rated current is 26A at 220V and 23A at 380V, which can meet the control needs of small and medium-sized motors.

Contactos auxiliares: Standard configuration is 1a1b (1 normalmente abierto + 1 normalmente cerrado). The reversible model (S-2xP25) supports 2×1a1b and can be expanded with a mechanical interlock module (MPU-21).

2. Características eléctricas

Voltaje de la bobina: Supports multiple options such as 24V, 110V, 220V, 380V, and 440V, compatible with mainstream global power supply standards.

Protection Design: Models with a protective cover (suffixed with “S”) comply with the IP20 protection level, which can prevent the intrusion of foreign objects.

Certification Compliance: Has passed multiple international certifications including CCC, UL, CSA, TUV, and CE, and can be legally sold and used in the Chinese market.

1. Application Scenarios and Industry Adaptation
2. Aplicaciones típicas

Control de motores: Suitable for starting, stopping, and forward/reverse operations of three-phase asynchronous motors, and is widely used in equipment such as elevators, injection molding machines, and machine tools.

Power Transmission and Distribution Systems: Serves as a core component in industrial distribution panels to achieve rapid circuit breaking and protection.

Líneas de producción automatizadas: Cooperates with equipment such as PLCs and frequency converters to build intelligent control systems, supporting remote monitoring and automated processes.

2. Industry Adaptation

Manufacturing Industry: Power control for production lines in mechanical processing, food packaging, and automobile manufacturing.

Building Automation: Power management for elevator drives and central air conditioning systems.

Energy Sector: Circuit switching and protection in small power plants and substations.

III. Selection and Installation Points

1. Recomendaciones de selección

Coincidencia de carga: Select the corresponding model based on the motor power and voltage level. Por ejemplo, a 380V/12kW motor should be matched with the S-P25 (380V specification).

Environment Adaptation: The recommended operating temperature is -30℃~70℃, and the humidity should be ≤95% (sin condensación). Long-term use in dusty or oily environments should be avoided.

Funciones de expansión: If surge protection is required, an external coil surge absorber can be connected; for complex control scenarios, a thermal overload relay (such as the TH-P series) can be matched to form a motor starter (MS-P series).

2. Instalación y cableado

Fixing Method: Supports DIN rail installation or screw fixing, and heat dissipation space should be reserved (refer to IP20 protection requirements).

Especificaciones de cableado: Wires with a cross-sectional area of 2.5-4mm² should be used for main circuit terminals to ensure a secure connection; wires of 1.5mm² are recommended for control circuits to avoid signal interference.

Safety Precautions: Se debe cortar el suministro eléctrico antes de la instalación., and the grounding terminal (educación física) must be reliably connected to the protective ground to prevent electric shock risks.

1. Compra y soporte técnico
2. Canales de adquisiciones

Official Authorization: Purchase the Shihlin S-P25 via Shihlin Electric’s WhatsApp: 0086-13811255435. El precio es aproximadamente 150-380 RMB por unidad (depending on the coil voltage).

International Procurement: WhatsApp: 0086-13811255435 provides global shipping services. The model is “Shihlin S-P25 AC25A 220V”, and attention should be paid to voltage compatibility.

1. Modelos alternativos y soluciones de actualización
2. Same-Series Alternatives

S-P30T: With a rated current of 30A, it is suitable for 15kW/380V motors and supports expansion of more auxiliary contacts.

S-P21: With a current of 21A, it is suitable for 5.5kW/220V motors and has a lower cost.

2. System Upgrades

Intelligent Control: Match with Shihlin PLCs (such as the SS series) and HMIs (Human-Machine Interfaces) to realize remote monitoring and fault diagnosis.

Energy-Saving Solutions: Combine with Shihlin frequency converters (such as the SA3 series) to build a variable-frequency speed regulation system, reducing energy consumption by more than 30%.

1. Precautions and Maintenance Recommendations
2. Mantenimiento diario

Inspección periódica: Clean the dust on the surface of the contactor every quarter, check the wear of the contacts, and replace them in a timely manner if there is severe ablation.

Pruebas de función: Conduct pull-in/release tests every year to ensure the action time is ≤10ms and the contact resistance is ≤50mΩ.

2. Solución de problemas

Contact Welding: Mostly caused by overload or voltage fluctuation; it is necessary to check the load current and power supply stability.

Coil Burning: May be caused by abnormal voltage or long-term power-on; it is recommended to install an overvoltage protection module.