General
Assembly arrangement	Basic element
Model	Single push button
Number of poles	1
Mounting method	Flush mounted (plaster)
Type of fastening	Mounting with claw and screw
Material	Plastic
Material quality	Duroplast
Surface protection	Untreated
Surface finishing	Matt
Suitable for degree of protection (IP)	IP20
Nominal voltage	250
Rated current	10
Width of device	71
Height of device	71
Depth of device	40
Min. depth of built-in installation box	25
Number of contacts as normally open contact	1
Feedback-signal contact
With lighting
Halogen free
Antibacterial treatment
Transparent
With signal lamp
IFTTT support available
With light source

The Busch Jaeger 2020 USGL is a flush-mounted single toggle switch for use in electrical installations. It is designed for switching consumers and is particularly suitable for applications with relays or toggle dimmers. The device is configured as a single-pole closer and features integrated lighting, realised via a neon lamp type 8352 (1 mA). The lamp is replaceable from the front, allowing maintenance and replacement without dismantling the entire switch. Replacement lamps available include types 8360, 8362, 8363, as well as LED inserts. The actuation force is 7 to 9 Newtons, measured at the actuation point 20 mm outside the toggle centre, ensuring secure and precise operation.

Applications
This switch is designed for indoor use and complies with protection class IP20, protecting against contact with fingers and solid foreign objects. It is intended for mounting in flush-mounted boxes in accordance with DIN 49073, requiring a minimum box depth of 25 mm. Applications include residential and commercial buildings where reliable switching function with visual feedback is required. The integrated lighting enables orientation in the dark, particularly in corridors, stairwells, or bathrooms.

Functions and Equipment in Detail
The device features a rear connection with spring clamp and a side spring release, enabling quick and secure connection of wires. The N-clamp is integrated, simplifying installation. The surface is made of duroplast, halogen-free and matte, without antibacterial treatment. The finish is untreated and transparent, allowing the design of the respective decor line to determine the appearance. The device dimensions are 71 mm (width), 71 mm (height), and 40 mm (depth), enabling standard mounting in typical flush-mounted boxes.

Technology Explained Simply
The switch operates as a closer, closing the contact upon actuation to activate the circuit. The rated voltage is 250 V, and the rated current is 10 A, sufficient for use in typical residential and office installations. Lighting is provided by a neon lamp connected via a lamp holder. The neon lamp is designed for a current consumption of 1 mA, ensuring low energy consumption and long service life. The spring clamps ensure a secure and durable connection of wires, with the spring release enabling easy installation and removal.

Compatibility and Accessories
The switch is available in various design lines, including Platform 63, Busch-Duro 2000® SI, Reflex SI, Busch-balance® SI, Busch-art linear®, future® linear, Busch-axcent®, solo®, pur edelstahl, carat®, Busch-dynasty®, and Allwetter 44® (IP44). Design line variants include Busch-Duro 2000® SI Linear, Reflex SI Linear, Busch-art linear® with decor ring, Busch-art linear® real material, future® linear, Busch-axcent® pur, alpha nea®, and alpha exclusive®. Compatibility with these decor lines enables uniform design of the installation. Lighting can be supplemented with various replacement lamps (8360, 8362, 8363) and LED inserts, with selection based on requirements for brightness and colour temperature.

Mounting and Installation
Mounting is performed in flush-mounted boxes in accordance with DIN 49073. The box must have a minimum depth of 25 mm to properly secure the switch. Fixing is done via claw or screw fastening, depending on the box design. Connections are made via spring clamps, with the N-clamp integrated. Tool-free mounting is possible, as the spring clamps and spring release allow easy wire connection. The surface is matte and untreated, so the visual design is determined by the respective decor line.

Advantages in Operation
The switch provides a reliable switching function with integrated lighting, facilitating orientation in the dark. The spring clamps ensure a secure and durable wire connection, making the installation robust and easy to maintain. The replaceable neon lamp allows simple maintenance without dismantling the entire switch. Compatibility with various design lines enables uniform installation design. The actuation force of 7 to 9 N ensures precise and secure operation without requiring excessive pressure. Protection class IP20 protects against contact and solid foreign objects, sufficient for indoor use.