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Harmony XB4 & XB5 Emergency Stop Push Buttons

Schneider Electric Harmony XB4 and XB5 Emergency Stop Push Buttons offer 40mm mushroom heads and operate with a latched push-pull, turn release, or key release mechanism. These push buttons feature a robust metal or plastic bezel, depending on the model. Emergency Machine Stop (EMS) and Emergency Off (EO) push buttons are easily installed into a standard 22mm diameter cutout and connected with simple screw-clamp connections. These push buttons are clearly visible at a distance due to the clear color and prominent 30mm, 40mm, or 60mm mushroom shapes. Due to the IP66 rating, these push buttons are impact-, dust-, water-, and vibration-resistant, making them ideal for operation in even the most demanding environments. Schneider Electric Harmony XB4 and XB5 Emergency Stop Push Buttons are compatible for installation with XALK and XAPK yellow lid control stations.

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Part #

Emergency Stop Switches / E-Stop Switches E.stop PB plastic red mushr key 1NC

XB5AS9442
Schneider Electric
1: £82.04
9In Stock

Mfr. Part No.
XB5AS9442

Mouser Part No
996-XB5AS9442

Schneider Electric

Emergency Stop Switches / E-Stop Switches E.stop PB plastic red mushr key 1NC

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Datasheet

9In Stock

£82.04

£74.76

£72.42

£67.76

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Min.: 1
Mult.: 1

Emergency Stop Switches

Control Stations EMERGENCY STOP CONT. BOX

XALK178F
Schneider Electric
1: £144.73
27In Stock

Mfr. Part No.
XALK178F

Mouser Part No
996-XALK178F

Schneider Electric

Control Stations EMERGENCY STOP CONT. BOX

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Datasheet

27In Stock

£144.73

£140.14

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Min.: 1
Mult.: 1

Control Station

Emergency Stop Switches / E-Stop Switches D40 EMERGENCY STOP TTR HEAD

XB4BS8442
Schneider Electric
1: £74.21
58In Stock

Mfr. Part No.
XB4BS8442

Mouser Part No
996-XB4BS8442

Schneider Electric

Emergency Stop Switches / E-Stop Switches D40 EMERGENCY STOP TTR HEAD

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Datasheet

58In Stock

£74.21

£66.50

Min.: 1
Mult.: 1

Emergency Stop Switches

Emergency Stop Switches / E-Stop Switches TRIGGER E-STOP

XB4BS8444
Schneider Electric
1: £65.10
115In Stock
147Expected 14/09/2026

Mfr. Part No.
XB4BS8444

Mouser Part No
996-XB4BS8444

Schneider Electric

Emergency Stop Switches / E-Stop Switches TRIGGER E-STOP

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Datasheet

115In Stock

147Expected 14/09/2026

£65.10

£58.09

Min.: 1
Mult.: 1

Emergency Stop Switches

Panel Mount

Emergency Stop Switches / E-Stop Switches TRIGGER E-STOP W/CB'S

XB4BS84441
Schneider Electric
1: £101.77
16In Stock
23Expected 21/09/2026

Mfr. Part No.
XB4BS84441

Mouser Part No
996-XB4BS84441

Schneider Electric

Emergency Stop Switches / E-Stop Switches TRIGGER E-STOP W/CB'S

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Datasheet

16In Stock

23Expected 21/09/2026

£101.77

£100.16

£99.79

£99.40

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Min.: 1
Mult.: 1

Emergency Stop Switches

Emergency Stop Switches / E-Stop Switches PUSHBUTTON OPERATOR 22MM XB4B

XB4BS8445
Schneider Electric
1: £97.79
102In Stock
154On Order

Mfr. Part No.
XB4BS8445

Mouser Part No
996-XB4BS8445

Schneider Electric

Emergency Stop Switches / E-Stop Switches PUSHBUTTON OPERATOR 22MM XB4B

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Datasheet

102In Stock

154On Order

£97.79

£86.87

£85.41

£83.58

Min.: 1
Mult.: 1

Emergency Stop Switches

SPDT

ON - ON

Panel Mount

Emergency Stop Switches / E-Stop Switches PUSHBUTTON OPERATOR 22MM XB4B

XB4BT845
Schneider Electric
1: £54.68
27In Stock

Mfr. Part No.
XB4BT845

Mouser Part No
996-XB4BT845

Schneider Electric

Emergency Stop Switches / E-Stop Switches PUSHBUTTON OPERATOR 22MM XB4B

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Datasheet

27In Stock

£54.68

£51.38

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Min.: 1
Mult.: 1

Emergency Stop Switches

Panel Mount

Emergency Stop Switches / E-Stop Switches E.stop PB plastic red mushr turn 1NC

XB5AS8442
Schneider Electric
1: £73.73
26In Stock
30Expected 21/09/2026

Mfr. Part No.
XB5AS8442

Mouser Part No
996-XB5AS8442

Schneider Electric

Emergency Stop Switches / E-Stop Switches E.stop PB plastic red mushr turn 1NC

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Datasheet

26In Stock

30Expected 21/09/2026

£73.73

£67.09

Min.: 1
Mult.: 1

Emergency Stop Switches

SPST

ON - (OFF)

Panel Mount

Emergency Stop Switches / E-Stop Switches E-STOP TTR W/ 2NC E-STOP TTR W/ 2NC

XB5AS8444
Schneider Electric
1: £92.01
23In Stock
19Expected 23/09/2026

Mfr. Part No.
XB5AS8444

Mouser Part No
996-XB5AS8444

Schneider Electric

Emergency Stop Switches / E-Stop Switches E-STOP TTR W/ 2NC E-STOP TTR W/ 2NC

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Datasheet

23In Stock

19Expected 23/09/2026

£92.01

£87.12

£87.08

£86.42

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Min.: 1
Mult.: 1

Emergency Stop Switches

Emergency Stop Switches / E-Stop Switches E-STOP TTR W/ 1 NO & NC

XB5AS8445
Schneider Electric
1: £109.11
35In Stock

Mfr. Part No.
XB5AS8445

Mouser Part No
996-XB5AS8445

Schneider Electric

Emergency Stop Switches / E-Stop Switches E-STOP TTR W/ 1 NO & NC

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Datasheet

35In Stock

£109.11

£107.14

Min.: 1
Mult.: 1

Emergency Stop Switches

Panel Mount

Emergency Stop Switches / E-Stop Switches E.stop PB plastic red mushr pull 1NC

XB5AT842
Schneider Electric
1: £50.41
40In Stock

Mfr. Part No.
XB5AT842

Mouser Part No
996-XB5AT842

Schneider Electric

Emergency Stop Switches / E-Stop Switches E.stop PB plastic red mushr pull 1NC

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Datasheet

40In Stock

£50.41

£43.91

£41.86

£41.72

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Min.: 1
Mult.: 1

Emergency Stop Switches

Push-Pull

SPST

ON - (OFF)

Panel Mount

Switch Actuators MUSHROOM PB

ZB4BS844
Schneider Electric
1: £61.69
281In Stock
100On Order

Mfr. Part No.
ZB4BS844

Mouser Part No
996-ZB4BS844

Schneider Electric

Switch Actuators MUSHROOM PB

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Datasheet

281In Stock

100On Order

£61.69

£57.56

Min.: 1
Mult.: 1

Switch Actuators

Turn to Release

Switch Actuators TRIGGER ACTION TURN TO RELEASE 40MM RED

ZB5AS844
Schneider Electric
1: £63.41
286In Stock

Mfr. Part No.
ZB5AS844

Mouser Part No
996-ZB5AS844

Schneider Electric

Switch Actuators TRIGGER ACTION TURN TO RELEASE 40MM RED

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Datasheet

286In Stock

£63.41

£50.74

Min.: 1
Mult.: 1

Switch Actuators

Turn to Release

Switch Contact Blocks / Switch Kits N/O CONTACT BLOCK

ZBE101
Schneider Electric
1: £11.08
3,598In Stock

Mfr. Part No.
ZBE101

Mouser Part No
996-ZBE101

Schneider Electric

Switch Contact Blocks / Switch Kits N/O CONTACT BLOCK

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Datasheet

3,598In Stock

£11.08

£10.18

£10.06

£9.89

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Min.: 1
Mult.: 1

Switch Contact Blocks / Switch Kits

SPST

Switch Contact Blocks / Switch Kits N/C CONTACT BLOCK

ZBE102
Schneider Electric
1: £10.07
2,212In Stock
1,220Expected 16/09/2026

Mfr. Part No.
ZBE102

Mouser Part No
996-ZBE102

Schneider Electric

Switch Contact Blocks / Switch Kits N/C CONTACT BLOCK

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Datasheet

2,212In Stock

1,220Expected 16/09/2026

£10.07

£9.23

Min.: 1
Mult.: 1

Switch Contact Blocks / Switch Kits

SPST

Emergency Stop Switches / E-Stop Switches E.stop PB metal red mushr pull 1NC

XB4BT842
Schneider Electric
1: £48.18
20In Stock
22Expected 17/09/2026

Mfr. Part No.
XB4BT842

Mouser Part No
996-XB4BT842

Schneider Electric

Emergency Stop Switches / E-Stop Switches E.stop PB metal red mushr pull 1NC

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Datasheet

20In Stock

22Expected 17/09/2026

£48.18

£42.58

£42.17

£41.89

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Min.: 1
Mult.: 1

Emergency Stop Switches

SPST

ON - (OFF)

Panel Mount

Emergency Stop Switches / E-Stop Switches PUSHBUTTON 230VAC 2AMP XB5

XB5AS9445
Schneider Electric
1: £104.86
12In Stock

Mfr. Part No.
XB5AS9445

Mouser Part No
996-XB5AS9445

Schneider Electric

Emergency Stop Switches / E-Stop Switches PUSHBUTTON 230VAC 2AMP XB5

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Datasheet

12In Stock

£104.86

£100.55

£100.31

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Min.: 1
Mult.: 1

Emergency Stop Switches

Panel Mount

Switch Actuators TRIGGER ACTION KEY RELEASE 40MM RED

ZB5AS944
Schneider Electric
1: £118.90
6In Stock

Mfr. Part No.
ZB5AS944

Mouser Part No
996-ZB5AS944

Schneider Electric

Switch Actuators TRIGGER ACTION KEY RELEASE 40MM RED

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Datasheet

6In Stock

£118.90

£106.27

£106.26

£106.25

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Min.: 1
Mult.: 1

Switch Actuators

Pushbutton Head

Switch Actuators PUSHBUTTON MUSHROOM HEAD 22MM XB4

ZB4BS84430
Schneider Electric
1: £63.38
74In Stock
872On Order

Mfr. Part No.
ZB4BS84430

Mouser Part No
996-ZB4BS84430

Schneider Electric

Switch Actuators PUSHBUTTON MUSHROOM HEAD 22MM XB4

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Datasheet

74In Stock

872On Order

£63.38

£51.62

Min.: 1
Mult.: 1

Switch Actuators

Pushbutton

Control Stations PUSH BUTTON ENCLSR 600VAC 10A XALB SP

XALK178H7
Schneider Electric
1: £122.25
1In Stock
24On Order

Mfr. Part No.
XALK178H7

Mouser Part No
996-XALK178H7

Schneider Electric

Control Stations PUSH BUTTON ENCLSR 600VAC 10A XALB SP

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Datasheet

1In Stock

24On Order

£122.25

£103.60

£103.21

£101.40

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Min.: 1
Mult.: 1

Control Station

Emergency Stop Switches / E-Stop Switches D40 EMERGENCY STOP KR 455E

XB4BS9442
Schneider Electric
1: £119.22
1In Stock
4On Order

Mfr. Part No.
XB4BS9442

Mouser Part No
996-XB4BS9442

Schneider Electric

Emergency Stop Switches / E-Stop Switches D40 EMERGENCY STOP KR 455E

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Datasheet

1In Stock

4On Order

£119.22

£109.73

£108.06

£105.28

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Min.: 1
Mult.: 1

Emergency Stop Switches

Panel Mount

Switch Actuators MUSHROOM PB OPERATOR

ZB4BS834
Schneider Electric
1: £57.02
17In Stock
62On Order

Mfr. Part No.
ZB4BS834

Mouser Part No
996-ZB4BS834

Schneider Electric

Switch Actuators MUSHROOM PB OPERATOR

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Datasheet

17In Stock

62On Order

£57.02

£51.16

£50.83

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Min.: 1
Mult.: 1

Switch Actuators

Head

Panel Mount

Switch Actuators MUSHROOM PB

ZB4BS944
Schneider Electric
1: £94.04
8In Stock

Mfr. Part No.
ZB4BS944

Mouser Part No
996-ZB4BS944

Schneider Electric

Switch Actuators MUSHROOM PB

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Datasheet

8In Stock

£94.04

£83.90

£83.08

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Min.: 1
Mult.: 1

Switch Actuators

Key Operated

Switch Actuators MUSHROOM PB

ZB4BT84
Schneider Electric
1: £29.02
20In Stock
26Expected 14/09/2026

Mfr. Part No.
ZB4BT84

Mouser Part No
996-ZB4BT84

Schneider Electric

Switch Actuators MUSHROOM PB

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Datasheet

20In Stock

26Expected 14/09/2026

£29.02

£26.46

Min.: 1
Mult.: 1

Switch Actuators

Push-Pull

Switch Actuators TRIGGER ACTION TURN TO RELEASE 30MM RED

ZB5AS834
Schneider Electric
1: £57.84
10In Stock

Mfr. Part No.
ZB5AS834

Mouser Part No
996-ZB5AS834

Schneider Electric

Switch Actuators TRIGGER ACTION TURN TO RELEASE 30MM RED

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Datasheet

10In Stock

£57.84

£54.63

£54.53

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Min.: 1
Mult.: 1

Switch Actuators

Head

Panel Mount

Harmony XB4 & XB5 Emergency Stop Push Buttons

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