The Schneider Electric Harmony XB4 is an emergency stop switch with a red mushroom head and key release. It features latching and locking, and is reset by unlocking with the Ronis 455 lock. It has one normally open and one normally closed slow-break contact.

• Colour: Red
• Type: Key-operated
• Material: Chrome-plated metal and Zamak
• Mounting diameter: 22 mm
• Actuator: Red, unmarked Ø 40 mm mushroom head
• Operation: Latching and locking; reset and release by key
• Lock: Ronis 455, with key removal in the central position
• Contacts: 1 NO + 1 NC, slow-break
• Connections: Screw terminals, 1 × 0.22 mm² without cable end, in accordance with EN 60947-1
• Dimensions: Height 47 mm, width 40 mm, depth 104 mm
• Weight: 0.17 kg
• High-pressure washdown resistance: 7,000,000 Pa at 55 °C, from a distance of 0.1 m
• Contact travel: 1.5 mm (NC), 2.6 mm (NO), 4.3 mm total
• Operating force: 44 N
• Mechanical durability: 300,000 cycles
• Tightening torque: 0.8–1.2 N·m, in accordance with EN 60947-1
• Contact material: Silver alloy (Ag/Ni)
• Short-circuit protection: 10 A
• Ith: 10 A
• Ui: 600 V
• Uimp: 6 kV
• Ie: 3 A at 240 V AC-15 A600, 6 A at 120 V AC-15 A600, 0.1 A at 600 V DC-13 Q600, 0.27 A at 250 V DC-13 Q600, 0.55 A at 125 V DC-13 Q600, 1.2 A at 600 V AC-15 A600
• Storage and operating temperature: -40 to 70 °C
• Protection class: Class I, in accordance with IEC 60536
• Degree of protection: IP69, IP67 and IP66 in accordance with IEC 60529, IP69K, NEMA 13, NEMA 4X
• Impact resistance: IK03 in accordance with IEC 50102
• Standards: EN/IEC 60947-1, EN/IEC 60204-1, EN/IEC 60947-5-4, JIS C 4520, IEC 60364-5-53, EN/ISO 13850, CSA C22.2 No. 14, UL 508, EN/IEC 60947-5-1, EN/IEC 60947-5-5
• Certifications: GL, LROS (Lloyd’s Register of Shipping), RINA, CSA, BV, DNV, UL
• Vibration resistance: 5 gn (f = 2–500 Hz), in accordance with IEC 60068-2-6
• Shock resistance: 30 gn for 18 ms and 50 gn for 11 ms, in accordance with IEC 60068-2-27