Schneider ZB5AS834 Harmony XB5 Emergency Stop Head 30mm 22mm Red Twist-Release

The Schneider Electric ZB5AS834 is a red Ø30 mm mushroom-head emergency stop push-button head from the Harmony XB5 series, designed for 22 mm panel cutouts. It operates with a latching (trip and hold) action and is reset by twist-release, making it compliant with machine safety requirements for emergency stop applications.

Technical specifications:

• Commercial reference: ZB5AS834
• Manufacturer: Schneider Electric
• EAN:
• Series / range: Harmony XB5
• Product type: Head for emergency stop push-button
• Head profile: Red mushroom button, Ø30 mm, unmarked
• Mounting diameter: 22 mm
• Head action: Latching action with mechanical hold
• Reset method: Twist-release
• Head shape: Round
• Dimensions (W x H x D): 30 x 30 x 57 mm
• Weight: 0.042 kg
• Mechanical durability: 300,000 operating cycles
• Operating temperature: -40...70°C
• Storage temperature: -40...70°C
• IP protection: IP66, IP67, IP69, IP69K (IEC 60529)
• NEMA rating: NEMA 4X, NEMA 13
• Impact resistance: IK03 (IEC 50102)
• Overvoltage category: Class II (IEC 60536)
• Pressure wash resistance: 7,000,000 Pa at 55°C, distance 0.1 m
• Vibration resistance: 5 gn at 2-500 Hz (IEC 60068-2-6)
• Shock resistance: 30 gn / 18 ms and 50 gn / 11 ms (IEC 60068-2-27)
• Protection treatment: TH
• Certifications: CSA, UL, DNV, Bureau Veritas (BV), Lloyd's Register of Shipping
• Compatibility: ZB5 contact block range
• Warranty: 18 months

Features and benefits:

• Latching mushroom-head design holds the emergency stop state until deliberately reset by twist-release, preventing accidental restart
• High ingress protection to IP66, IP67, IP69, and IP69K suits harsh industrial environments including washdown areas
• Wide operating temperature range of -40...70°C allows use in both cold-storage and high-temperature industrial settings
• 300,000 cycle mechanical durability ensures long service life in frequently operated safety circuits
• Compatible with XALD and XALK enclosures (1-5 cutout stations) for flexible panel building
• Multiple international certifications including UL, CSA, DNV, and Lloyd's Register support global machine deployments

Applications:

• Emergency stop circuits on industrial machinery and automated production lines
• Machine control panels requiring ISO 13850 and IEC 60204-1 compliant safety actuators
• Washdown and food-processing environments where IP69K protection is required
• Marine and offshore control stations certified to DNV and Lloyd's Register standards
• General industrial control desks and push-button enclosures using ZB5 modular contact blocks

Compliant with IEC 60947-5-5, IEC 60947-5-1, IEC 60947-1, ISO 13850, IEC 60204-1, UL 508, CSA C22.2 No 14, and JIS C8201-5-1. Part of the Schneider Electric Harmony XB5 range.

Also known as: Schneider ZB5AS834, Schneider Electric ZB5AS834, Harmony XB5 emergency stop head, 22 mm mushroom push-button head twist-release.