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Datasheet generated 2026-10-07
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Emergency Stop Button Push/turn Ø40 2N (XB4BS8444)

Schneider Electric · Control & Automation · Pushbuttons & Pilot Lights · France · se.com
Part Number
XB4BS8444  ·  HS 8536.50
Emergency Stop Button Push/turn Ø40 2N (XB4BS8444)

Schneider Electric XB4BS8444 — Harmony XB4 22 mm command actuator. Metal or plastic 22 mm cutout push-button, selector or indicator. Emergency stop button push/turn Ø40 2NC.

Technical Specifications

Manufacturer part number (MPN)XB4BS8444
EAN / GTIN3389110959000
Sales unitpcs
Package quantity80 pcs
Diameter40 mm
Range of productHarmony XB4
Product or component typeEmergency stop push-button; Emergency switching off push-button
Device short nameXB4
Bezel materialChromium plated metal
Fixing collar materialZamak
Mounting diameter22.5 mm
Sale per indivisible quantity1
Shape of signaling unit headRound
Type of operatortrigger action and mechanical latching
Head typeStandard
ResetTurn to release
Operator profileRed mushroom Ø 40 mm, unmarked
Contact operationSlow-break
Connections - terminalsScrew clamp terminals, = 1 x 0.22 mm² without cable end conforming to IEC 60947-1
Height47 mm
Width40 mm
Depth82 mm
Terminals description ISO n°1(21-22)NC
Product weight0.13 kg
Resistance to high pressure washer7000000 Pa at 55 °C, distance : 0.1 m
Contacts type and composition2 NC
Contacts usageStandard contacts
Positive openingWith conforming to IEC 60947-5-1 appendix K
Operating travel1.5 mm (NC changing electrical state); 4.3 mm (total travel)
Mechanical durability300000 cycles
Tightening torque0.8…1.2 N.m conforming to IEC 60947-1
Shape of screw headCross compatible with Philips no 1 screwdriver; Cross compatible with pozidriv No 1 screwdriver; Slotted compatible with flat Ø 4 mm screwdriver; Slotted compatible with flat Ø 5.5 mm screwdriver
Contacts materialSilver alloy (Ag/Ni)
Short-circuit protection10 A cartridge fuse type gG conforming to IEC 60947-5-1
[Ith] conventional free air thermal current10 A conforming to IEC 60947-5-1
[Ui] rated insulation voltage600 V (pollution degree 3) conforming to IEC 60947-1
[Uimp] rated impulse withstand voltage6 kV conforming to IEC 60947-1
[Ie] rated operational current3 A at 240 V, AC-15, A600 conforming to IEC 60947-5-1; 6 A at 120 V, AC-15, A600 conforming to IEC 60947-5-1; 0.1 A at 600 V, DC-13, Q600 conforming to IEC 60947-5-1; 0.27 A at 250 V, DC-13, Q600 conforming to IEC 60947-5-1; 0.55 A at 125 V, DC-13, Q600 conforming to IEC 60947-5-1; 1.2 A at 600 V, AC-15, A600 conforming to IEC 60947-5-1
Electrical durability1000000 cycles, AC-15, 2 A at 230 V, operating rate <3600 cyc/h, load factor: 0.5 conforming to IEC 60947-5-1 appendix C; 1000000 cycles, AC-15, 3 A at 120 V, operating rate <3600 cyc/h, load factor: 0.5 conforming to IEC 60947-5-1 appendix C; 1000000 cycles, AC-15, 4 A at 24 V, operating rate <3600 cyc/h, load factor: 0.5 conforming to IEC 60947-5-1 appendix C; 1000000 cycles, DC-13, 0.2 A at 110 V, operating rate <3600 cyc/h, load factor: 0.5 conforming to IEC 60947-5-1 appendix C; 1000000 cycles, DC-13, 0.5 A at 24 V, operating rate <3600 cyc/h, load factor: 0.5 conforming to IEC 60947-5-1 appendix C
Electrical reliabilityΛ < 10exp(-6) at 5 V and 1 mA in clean environment conforming to IEC 60947-5-4; Λ < 10exp(-8) at 17 V and 5 mA in clean environment conforming to IEC 60947-5-4
Device presentationComplete product
Protective treatmentTH
Ambient air temperature for storage-40…70 °C
Ambient air temperature for operation-40…70 °C
Electrical shock protection classClass I conforming to IEC 60536
IP degree of protectionIP66 conforming to IEC 60529; IP67; IP69; IP69K
Enclosure TypeUL type 4X/13
IK degree of protectionIK06 conforming to IEC 50102
StandardsJIS C8201-5-1; IEC 60364-5-53; UL 508; IEC 60947-5-1; CSA C22.2 No 14; ISO 13850; IEC 60947-5-5; IEC 60947-1; IEC 60204-1; IEC 60947-5-4; JIS C8201-1
Product certificationsCSA; LROS (Lloyds register of shipping); BV; UL listed; DNV
Vibration resistance5 gn (f= 2…500 Hz) conforming to IEC 60068-2-6
Shock resistance30 gn (duration = 18 ms) for half its wave acceleration conforming to IEC 60068-2-27; 50 gn (duration = 11 ms) for half its wave acceleration conforming to IEC 60068-2-27
Number of Units in Package 11
Number of Units in Package 280
Number of Units in Package 3640
Country of originCZ
Warranty (in months)18
Unlocking methodTurn-release
Number of contacts as normally closed contact2
Degree of protection (IP)IP66
Mounting methodBuilt-in
With lightingNo
Hole diameter22.5 mm
Connection type auxiliary circuitScrew connection
Diameter cap40 mm

Properties

MOQ1

Cross-References

Attached Documents