Siemens 5TT4217-2 Installation Relay 16A 2CO 230V/400V AC 24V DC

The Siemens 5TT4217-2 installation relay is a professional-grade switching component engineered for precise electrical circuit management in both residential and industrial environments. This device provides reliable performance for controlling lighting, heating, or ventilation systems, ensuring seamless integration into standard electrical distribution boards. With its robust construction and high-quality internal mechanisms, it offers consistent operation for demanding electrical applications.

Advantages

This installation relay stands out due to its high switching capacity and versatile contact configuration. The 2CO (two-changeover) contact arrangement allows for flexible circuit design, enabling the control of two independent circuits or complex switching logic. Its compatibility with both 230V and 400V AC main circuits, combined with a 24V DC control voltage, makes it a highly adaptable solution for modern electrical infrastructure. The compact design ensures efficient use of space within DIN-rail mounted systems.

Suitable for

• Residential lighting control systems
• Industrial automation and process control
• Heating and cooling system management
• Switching of auxiliary circuits in distribution boards

When it may not be suitable

This relay is not intended for high-frequency switching applications that exceed its mechanical or electrical lifespan ratings. It is also not suitable for direct control of high-inductive loads that require specialized contact protection or arc suppression beyond standard specifications.

Key specifications

• Rated current: 16A
• Contact configuration: 2CO (two-changeover)
• Control voltage: 24V DC
• Main circuit voltage: 230V/400V AC
• Weight: 0.149 kg

How to use

The device is designed for mounting on a standard DIN rail within an electrical enclosure. Installation should be performed by a qualified electrician in accordance with local safety regulations. Connect the 24V DC control signal to the designated coil terminals and wire the load circuits to the 2CO contact terminals, ensuring that the current and voltage ratings are strictly observed to prevent damage to the device or the connected equipment.

What to consider before purchase

• Verify that your control system provides a 24V DC output.
• Ensure the load current does not exceed the 16A rating.
• Check available space on the DIN rail within your distribution board.
• Confirm that the 2CO contact configuration meets your specific circuit requirements.

Usage recommendations

Always ensure that the power supply is disconnected before performing any wiring or maintenance on the relay. Regularly inspect the connections for tightness to prevent overheating and ensure long-term operational reliability.