XB4 Operators and Emergency Stop Operators

ZB4BC24	ZB4BC2
ZB4BR2
ZB4BS834	ZB4BT4
ZB4BS64	ZB4BS74

These XB4 operators are available in momentary and maintained configurations with multiple actuation and release methods, including push-pull, turn-to-release, and key-release mechanisms. They are available in a wide range of mushroom head diameters (30 mm, 40 mm, and 60 mm) and color options to accommodate various operational and safety requirements. Specialized versions are available with markings such as "EMO" and "Robot Stop" for enhanced application identification.

The following tables provide catalog and selection guide information for Schneider Electric XB4 mushroom-head operators and emergency stop devices. The tables specify the available operator types, sizes, colors, release mechanisms, identification accessories, and catalog numbers.

Mushroom Heads, Momentary

Shape of Head	Diameter of Head	Color of Head	Catalog Number
	30 mm	Black	ZB4BC24
		Green	ZB4BC34
		Red	ZB4BC44
		Yellow	ZB4BC54
		Blue	ZB4BC64
	40 mm	Black	ZB4BC2
		Green	ZB4BC3
		Red	ZB4BC4
		Yellow	ZB4BC5
		Blue	ZB4BC6
	60 mm	Black	ZB4BR2
		Green	ZB4BR3
		Red	ZB4BR4
		Yellow	ZB4BR5
		Blue	ZB4BR6

Mushroom Heads for Maintained Push Buttons

Shape of Head	Type of Push	Diameter of Head	Color	Catalog Number
For use in Emergency Stop applications
	Trigger action Push-pull [1]	40 mm	Red	ZB4BT84
		60 mm	Red	ZB4BX84
	Trigger action Turn-to-release [1]	30 mm	Red	ZB4BS834
		40 mm	Red	ZB4BS844
			Red marked “EMO”	ZB4BS84430
		60 mm	Red	ZB4BS864
	Trigger action Key release (No. 455) [1]	30 mm	Red	ZB4BS934
		40 mm	Red	ZB4BS944 [2]
		60 mm	Red	ZB4BS964
For use in non-Emergency Stop applications
	Push-pull	40 mm	Black	ZB4BT2
		60 mm	Black	ZB4BX2
	Turn-to-release	30 mm	Black	ZB4BS42
		40 mm	Black	ZB4BS52
			Yellow	ZB4BS55
			Yellow marked “Robot Stop”	ZB4BS5550
		60 mm	Black	ZB4BS62
	Key release (No. 455)	30 mm	Black	ZB4BS72
		40 mm	Black	ZB4BS12
		60 mm	Black	ZB4BS22

ZBY9320