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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: S/427.79
9In Stock

Mfr. Part #
XB5AS9442

Mouser Part #
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

S/427.79

S/403.77

S/384.19

S/356.51

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Min.: 1
Mult.: 1

Emergency Stop Switches

Control Stations EMERGENCY STOP CONT. BOX

XALK178F
Schneider Electric
1: S/750.40
27In Stock

Mfr. Part #
XALK178F

Mouser Part #
996-XALK178F

Schneider Electric

Control Stations EMERGENCY STOP CONT. BOX

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Datasheet

27In Stock

S/750.40

S/726.57

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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: S/384.77
59In Stock

Mfr. Part #
XB4BS8442

Mouser Part #
996-XB4BS8442

Schneider Electric

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

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Datasheet

59In Stock

S/384.77

S/344.76

Min.: 1
Mult.: 1

Emergency Stop Switches

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

XB4BS8444
Schneider Electric
1: S/337.52
119In Stock

Mfr. Part #
XB4BS8444

Mouser Part #
996-XB4BS8444

Schneider Electric

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

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Datasheet

119In Stock

S/337.52

S/301.16

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: S/527.63
18In Stock

Mfr. Part #
XB4BS84441

Mouser Part #
996-XB4BS84441

Schneider Electric

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

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Datasheet

18In Stock

S/527.63

S/519.30

S/517.39

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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: S/507.54
102In Stock
154On Order

Mfr. Part #
XB4BS8445

Mouser Part #
996-XB4BS8445

Schneider Electric

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

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Datasheet

102In Stock

154On Order

S/507.54

S/454.14

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: S/283.49
27In Stock

Mfr. Part #
XB4BT845

Mouser Part #
996-XB4BT845

Schneider Electric

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

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Datasheet

27In Stock

S/283.49

S/266.40

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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: S/382.28
26In Stock

Mfr. Part #
XB5AS8442

Mouser Part #
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

S/382.28

S/347.83

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: S/477.03
23In Stock

Mfr. Part #
XB5AS8444

Mouser Part #
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

S/477.03

S/451.69

S/451.49

S/448.03

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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: S/565.70
36In Stock

Mfr. Part #
XB5AS8445

Mouser Part #
996-XB5AS8445

Schneider Electric

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

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Datasheet

36In Stock

S/565.70

S/555.50

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: S/261.34
40In Stock

Mfr. Part #
XB5AT842

Mouser Part #
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

S/261.34

S/227.67

S/217.01

S/216.31

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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: S/319.85
281In Stock
100On Order

Mfr. Part #
ZB4BS844

Mouser Part #
996-ZB4BS844

Schneider Electric

Switch Actuators MUSHROOM PB

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Datasheet

281In Stock

100On Order

S/319.85

S/298.40

Min.: 1
Mult.: 1

Switch Actuators

Turn to Release

Switch Actuators TRIGGER ACTION TURN TO RELEASE 40MM RED

ZB5AS844
Schneider Electric
1: S/328.80
287In Stock

Mfr. Part #
ZB5AS844

Mouser Part #
996-ZB5AS844

Schneider Electric

Switch Actuators TRIGGER ACTION TURN TO RELEASE 40MM RED

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Datasheet

287In Stock

S/328.80

S/263.06

Min.: 1
Mult.: 1

Switch Actuators

Turn to Release

Switch Contact Blocks / Switch Kits N/O CONTACT BLOCK

ZBE101
Schneider Electric
1: S/57.41
3,651In Stock

Mfr. Part #
ZBE101

Mouser Part #
996-ZBE101

Schneider Electric

Switch Contact Blocks / Switch Kits N/O CONTACT BLOCK

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Datasheet

3,651In Stock

S/57.41

S/52.78

S/52.12

S/51.26

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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: S/52.20
2,234In Stock

Mfr. Part #
ZBE102

Mouser Part #
996-ZBE102

Schneider Electric

Switch Contact Blocks / Switch Kits N/C CONTACT BLOCK

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Datasheet

2,234In Stock

S/52.20

S/47.84

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: S/249.82
20In Stock
22Expected 9/4/2026

Mfr. Part #
XB4BT842

Mouser Part #
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 9/4/2026

S/249.82

S/220.74

S/218.64

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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: S/543.63
12In Stock

Mfr. Part #
XB5AS9445

Mouser Part #
996-XB5AS9445

Schneider Electric

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

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Datasheet

12In Stock

S/543.63

S/521.32

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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: S/616.46
6In Stock

Mfr. Part #
ZB5AS944

Mouser Part #
996-ZB5AS944

Schneider Electric

Switch Actuators TRIGGER ACTION KEY RELEASE 40MM RED

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Datasheet

6In Stock

S/616.46

S/550.98

S/550.91

S/550.87

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Min.: 1
Mult.: 1

Switch Actuators

Pushbutton Head

Switch Actuators PUSHBUTTON MUSHROOM HEAD 22MM XB4

ZB4BS84430
Schneider Electric
1: S/328.60
184In Stock
190Expected 8/31/2026

Mfr. Part #
ZB4BS84430

Mouser Part #
996-ZB4BS84430

Schneider Electric

Switch Actuators PUSHBUTTON MUSHROOM HEAD 22MM XB4

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Datasheet

184In Stock

190Expected 8/31/2026

S/328.60

S/267.65

Min.: 1
Mult.: 1

Switch Actuators

Pushbutton

Control Stations PUSH BUTTON ENCLSR 600VAC 10A XALB SP

XALK178H7
Schneider Electric
1: S/633.78
1In Stock
24On Order

Mfr. Part #
XALK178H7

Mouser Part #
996-XALK178H7

Schneider Electric

Control Stations PUSH BUTTON ENCLSR 600VAC 10A XALB SP

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Datasheet

1In Stock

24On Order

S/633.78

S/537.13

S/535.10

S/525.72

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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: S/618.09
1In Stock
4On Order

Mfr. Part #
XB4BS9442

Mouser Part #
996-XB4BS9442

Schneider Electric

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

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Datasheet

1In Stock

4On Order

S/618.09

S/568.89

S/560.25

S/545.85

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Min.: 1
Mult.: 1

Emergency Stop Switches

Panel Mount

Switch Actuators MUSHROOM PB OPERATOR

ZB4BS834
Schneider Electric
1: S/295.60
17In Stock
37On Order

Mfr. Part #
ZB4BS834

Mouser Part #
996-ZB4BS834

Schneider Electric

Switch Actuators MUSHROOM PB OPERATOR

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Datasheet

17In Stock

37On Order

S/295.60

S/265.23

S/263.56

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Min.: 1
Mult.: 1

Switch Actuators

Head

Panel Mount

Switch Actuators MUSHROOM PB

ZB4BS944
Schneider Electric
1: S/487.54
3In Stock
5Expected 8/31/2026

Mfr. Part #
ZB4BS944

Mouser Part #
996-ZB4BS944

Schneider Electric

Switch Actuators MUSHROOM PB

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Datasheet

3In Stock

5Expected 8/31/2026

S/487.54

S/434.99

S/434.95

S/430.74

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Min.: 1
Mult.: 1

Switch Actuators

Key Operated

Switch Actuators MUSHROOM PB

ZB4BT84
Schneider Electric
1: S/150.45
23In Stock

Mfr. Part #
ZB4BT84

Mouser Part #
996-ZB4BT84

Schneider Electric

Switch Actuators MUSHROOM PB

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Datasheet

23In Stock

S/150.45

S/137.17

Min.: 1
Mult.: 1

Switch Actuators

Push-Pull

Switch Actuators EMERGENCY STOP HEAD RED PUSH PULL 60MM

ZB4BX84
Schneider Electric
1: S/236.94
5In Stock

Mfr. Part #
ZB4BX84

Mouser Part #
996-ZB4BX84

Schneider Electric

Switch Actuators EMERGENCY STOP HEAD RED PUSH PULL 60MM

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Datasheet

5In Stock

S/236.94

S/236.90

S/236.86

S/236.82

Quote

Min.: 1
Mult.: 1

Switch Actuators

Jumbo Mushroom

Harmony XB4 & XB5 Emergency Stop Push Buttons

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