Switches – Mouser Hong Kong

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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: HK$903.38
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

HK$903.38

HK$852.66

HK$811.31

HK$752.87

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Min.: 1
Mult.: 1

Emergency Stop Switches

Control Stations EMERGENCY STOP CONT. BOX

XALK178F
Schneider Electric
1: HK$1,584.65
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

HK$1,584.65

HK$1,534.35

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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: HK$1,011.96
59In 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

59In Stock

HK$1,011.96

HK$851.76

HK$837.78

HK$829.48

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Min.: 1
Mult.: 1

Emergency Stop Switches

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

XB4BS8444
Schneider Electric
1: HK$829.32
119In Stock

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

119In Stock

HK$829.32

HK$751.64

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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: HK$1,215.57
18In Stock

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

18In Stock

HK$1,215.57

HK$1,192.72

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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: HK$747.69
105In 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

105In Stock

154On Order

HK$747.69

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: HK$737.42
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

HK$737.42

HK$736.76

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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: HK$923.52
26In Stock

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

HK$923.52

HK$900.25

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: HK$1,070.74
23In Stock

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

HK$1,070.74

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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: HK$1,194.61
36In 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

36In Stock

HK$1,194.61

HK$1,173.08

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: HK$497.72
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

HK$497.72

HK$475.94

HK$469.20

HK$413.55

HK$401.38

Min.: 1
Mult.: 1

Emergency Stop Switches

Push-Pull

SPST

ON - (OFF)

Panel Mount

Switch Actuators TRIGGER ACTION TURN TO RELEASE 40MM RED

ZB5AS844
Schneider Electric
1: HK$710.70
287In 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

287In Stock

HK$710.70

HK$638.20

Min.: 1
Mult.: 1

Switch Actuators

Turn to Release

Switch Contact Blocks / Switch Kits N/O CONTACT BLOCK

ZBE101
Schneider Electric
1: HK$138.67
1,936In Stock
1,730Expected 27/8/2026

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

1,936In Stock

1,730Expected 27/8/2026

HK$138.67

HK$119.52

Min.: 1
Mult.: 1

Switch Contact Blocks / Switch Kits

SPST

Switch Contact Blocks / Switch Kits N/C CONTACT BLOCK

ZBE102
Schneider Electric
1: HK$144.34
2,234In Stock

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

2,234In Stock

HK$144.34

HK$121.82

Min.: 1
Mult.: 1

Switch Contact Blocks / Switch Kits

SPST

Keylock Switches PUSHBUTTON OPERATOR 22MM XB4B

XB4BS9445
Schneider Electric
1: HK$1,020.60
8In Stock

Mfr. Part No.
XB4BS9445

Mouser Part No
996-XB4BS9445

Schneider Electric

Keylock Switches PUSHBUTTON OPERATOR 22MM XB4B

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Datasheet

8In Stock

HK$1,020.60

HK$1,003.17

HK$977.28

HK$956.15

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Min.: 1
Mult.: 1

Keylock Switches

SPDT

ON - (OFF), OFF - (ON)

Panel Mount

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

XB4BT842
Schneider Electric
1: HK$641.57
20In Stock
22Expected 18/8/2026

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 18/8/2026

HK$641.57

HK$520.49

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: HK$1,371.01
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

HK$1,371.01

HK$1,370.85

HK$1,370.77

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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: HK$1,301.80
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

HK$1,301.80

HK$1,163.54

HK$1,163.38

HK$1,163.29

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Min.: 1
Mult.: 1

Switch Actuators

Pushbutton Head

Switch Actuators MUSHROOM PB

ZB4BS844
Schneider Electric
1: HK$675.44
202In Stock
179Expected 17/8/2026

Mfr. Part No.
ZB4BS844

Mouser Part No
996-ZB4BS844

Schneider Electric

Switch Actuators MUSHROOM PB

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Datasheet

202In Stock

179Expected 17/8/2026

HK$675.44

HK$630.15

Min.: 1
Mult.: 1

Switch Actuators

Turn to Release

Switch Actuators PUSHBUTTON MUSHROOM HEAD 22MM XB4

ZB4BS84430
Schneider Electric
1: HK$889.08
184In Stock
190Expected 31/8/2026

Mfr. Part No.
ZB4BS84430

Mouser Part No
996-ZB4BS84430

Schneider Electric

Switch Actuators PUSHBUTTON MUSHROOM HEAD 22MM XB4

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Datasheet

184In Stock

190Expected 31/8/2026

HK$889.08

HK$805.07

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Min.: 1
Mult.: 1

Switch Actuators

Pushbutton

Control Stations PUSH BUTTON ENCLSR 600VAC 10A XALB SP

XALK178H7
Schneider Electric
1: HK$1,540.51
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

HK$1,540.51

HK$1,299.66

HK$1,299.58

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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: HK$1,568.70
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

HK$1,568.70

HK$1,221.90

HK$1,221.66

HK$1,221.57

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Min.: 1
Mult.: 1

Emergency Stop Switches

Panel Mount

Switch Actuators MUSHROOM PB

ZB4BS944
Schneider Electric
1: HK$1,321.69
3In Stock

Mfr. Part No.
ZB4BS944

Mouser Part No
996-ZB4BS944

Schneider Electric

Switch Actuators MUSHROOM PB

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Datasheet

3In Stock

HK$1,321.69

HK$1,004.90

HK$1,004.81

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Min.: 1
Mult.: 1

Switch Actuators

Key Operated

Switch Actuators MUSHROOM PB

ZB4BT84
Schneider Electric
1: HK$371.46
44In Stock

Mfr. Part No.
ZB4BT84

Mouser Part No
996-ZB4BT84

Schneider Electric

Switch Actuators MUSHROOM PB

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Datasheet

44In Stock

HK$371.46

HK$363.16

Min.: 1
Mult.: 1

Switch Actuators

Push-Pull

Switch Actuators EMERGENCY STOP HEAD RED PUSH PULL 60MM

ZB4BX84
Schneider Electric
1: HK$500.35
5In Stock

Mfr. Part No.
ZB4BX84

Mouser Part No
996-ZB4BX84

Schneider Electric

Switch Actuators EMERGENCY STOP HEAD RED PUSH PULL 60MM

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Datasheet

5In Stock

HK$500.35

HK$500.27

HK$500.19

HK$500.10

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Min.: 1
Mult.: 1

Switch Actuators

Jumbo Mushroom

Harmony XB4 & XB5 Emergency Stop Push Buttons

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