Key-operated switch actuator with 3 stable positions ZB4BG0

Key Switch for Industrial and Other Applications

This keyed switch, catalog number ZB4BG0, is a reliable solution for controlling devices and processes requiring access security. Designed for panel mounting with a 22.5 mm diameter, it offers three stable switching positions, ensuring versatility across various applications. The key enables authorized access and prevents accidental setting changes.

Construction and Resistance to Environmental Conditions

Constructed from durable materials—with a chrome-plated metal front ring—the switch resists mechanical damage and corrosion. With an IP66 protection rating, it is sealed against dust and water jets, making it ideal for harsh industrial environments as well as less demanding settings. The wide operating temperature range (-25°C to 70°C) allows use in diverse climates. Vibration resistance (5 gn) and shock resistance (30 gn) further enhance its reliability.

Functionality and Applications

The ZB4BG0 switch is part of the Harmony XB4 series by Schneider Electric, renowned for high quality and reliability. The switching mechanism provides latching (no spring return), meaning the key remains in the selected position until manually changed. The key can be removed from any position, adding an extra layer of security. This makes the switch ideal for applications requiring access security, such as:

• Machine control panels
• Electrical enclosures
• Security systems
• Devices requiring authorized start-up or shutdown
• Industrial applications exposed to harsh environmental conditions

Additionally, the absence of backlighting minimizes power consumption and simplifies installation in locations where illumination is unnecessary. The standard mounting hole size (22.5 mm) facilitates easy replacement of existing switches with the ZB4BG0 model.