Square D Harmony XB4 Key Switch Head, Key No. 455, 3-Position Maintained, Right-Key Withdrawal
Square D Harmony XB4 key switch head for 22mm panel mounting. 3-position maintained operation with right-key withdrawal function. Key number 455. Model ZB4BG09.
Square D Harmony XB4 Key Switc...
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Square D Harmony XB4 Key Switch Head — 3-Position Maintained
The Square D Harmony XB4 ZB4BG09 is a key switch head for 22mm panel-mount operators. With a 3-position maintained action and right-key withdrawal, this switch head requires a key (No. 455) to operate and returns key withdrawal only from the right position, providing access control and operational security for industrial control panels.
Key Features
- 3-position maintained key switch operation
- Right-key withdrawal — key can only be removed in the right position
- Key number 455
- 22mm panel mount compatible (Harmony XB4 series)
Specifications
- Series: Harmony XB4
- Positions: 3
- Action: Maintained
- Key Withdrawal: Right position only
- Key Number: 455
- Model: ZB4BG09
- UPC: 78590137451
- Manufacturer: Square D (Schneider Electric)
Applications
Key switch heads are used in industrial control panels, machine tool controls, and process equipment to restrict operation to authorized personnel. The 3-position maintained design with right-key withdrawal is commonly used for mode selection functions where it is important to prevent unauthorized position changes. Compatible with Harmony XB4 series contact blocks and legend plates.
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