General
Rated voltage	250 V
Rated current	25 A
Number of poles	3
Degree of protection (IP)	IP20
Connection type	Spring clamp connection
Model	Bus
Cable diameter	11.5 mm
Connection cross section (fine-strand)	4 mm²
Connection cross section (solid-core)	4 mm²
Number of connections per pole	3
Pole codification	L, N, PE
Colour coding/contact insert	Black
Locking mechanism	Integrated in plug-in connector
Max. continuous temperature resistance contact part	85 °C
Max. continuous temperature resistance strain relief	105 °C
Material housing	Polyamide (PA)
Fire load	0.116667 kWh
Contact material	CuSn
Surface finish contacts	Tinned
Pollution degree	3
Continuity resistor	1 mOhm
Rated surge voltage	4 kV
Length	76 mm
Height	15 mm
Width	34.6 mm
Mechanical coding
With strain relief
Halogen free

The Hager inlet socket type G4703 is a 3-pole plug connector element for use in plug-in building installations, particularly in the EnergyBus system. It serves as a connection point for electrical cables and enables secure, tool-free connection of rigid and fine-wire cables with a cross-section of 1.5 to 2.5 mm². The socket is designed for a rated voltage of 250 V and a rated current of 25 A, making it suitable for typical low-voltage applications in electrical installations. The pole identification is marked with L, N and PE, ensuring unambiguous assignment of conductors in the electrical system.

Applications

The inlet socket is specifically designed for use in modern, modular plug connector systems, particularly in the context of EnergyBus installations. It is typically mounted in distributors, enclosures or on cable ducts to enable flexible and quickly realisable electrical installations. Use in indoor environments is intended, as the protection rating IP20 does not provide protection against contact with moving parts or against splashing water. Therefore, the socket is not suitable for outdoor use or in damp environments.

Functions and Equipment in Detail

The socket features a spring clamp connection, enabling tool-free installation of cables. This reduces installation time and increases efficiency during cabling. The connections are designed for up to three conductors per pole, allowing flexible use in more complex connections. The mechanical coding in black ensures unambiguous assignment of contacts and prevents incorrect insertion. The integrated locking mechanism in the plug connector ensures a secure and stable connection. The strain relief protects the cable from mechanical stress and extends the service life of the connection.

Technology Explained Simply

The contacts are made of copper-tin alloy (CuSn) and are tinned, ensuring high electrical conductivity and corrosion resistance. The contact resistance is 1 mOhm, indicating low energy loss. The maximum continuous temperature resistance of the contact part is 85 °C, while the strain relief is rated up to 105 °C. The housing is made of polyamide (PA), a robust and heat-resistant plastic that is also halogen-free. This contributes to reduced fire load and meets requirements for safe electrical installations. The rated impulse voltage is 4 kV, describing the electrical strength of the component under transient voltage stress. Pollution degree 3 indicates that the socket is suitable for environments with increased pollution risk, such as industrial plants or workshops.

Compatibility and Accessories

The inlet socket is specifically designed for use in the EnergyBus plug connector system. It is compatible with other components of the system, such as sockets, switches and distributors, which also use Wago technology. The mechanical coding ensures unambiguous assignment of polarity and prevents incorrect insertion. The socket can be used in combination with matching plug connectors and cable ducts to create a modular and expandable installation.

Mounting and Installation

Installation is carried out by inserting the cable into the spring clamp connection, where the strain relief protects the cable from mechanical stress. The socket is inserted into the designated plug connector, with the integrated locking mechanism ensuring a secure connection. The maximum cable diameter is 11.5 mm, enabling use with cables in the specified cross-section. The dimensions of the socket are 76 mm (length), 34.6 mm (width) and 15 mm (height), representing a compact design suitable for use in distributors and enclosures.

Advantages in Operation

The tool-free mounting and quick connection of cables significantly reduce installation time. The high electrical conductivity and corrosion resistance of the contacts ensure reliable and low-maintenance operation throughout the entire service life. The integrated strain relief and mechanical coding increase safety and extend the service life of the connection. The halogen-free material and RoHS compliance meet current requirements for environmentally compatible electrical products.