Schneider Electric ZB4BS844 Harmony XB4 Emergency Stop Head, 40mm Red Mushroom, IP66/IP67/IP69K

MPN: ZB4BS844
PPN: SCH-ZB4BS844

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Description

Harmony 22 mm modular push buttons, selector switches, pilot lights are designed for industry. This range combines simplicity of setup, flexibility and a robust construction. An ingenious locking system consisting of a snap fit head and body that can be tightened with a single screw but still ensuring an easy and yet secure mounting. Harmony XB4/ZB4 are 22 mm chromium plated metal modular push buttons, selector switches and pilot lights connecting to fully metal mounting collar. The operators can be purchased as complete operators or various modules that can be assembled to meet the user’s specific requirement. Harmony XB5/ZB5 are 22 mm plastic modular push buttons, selector switches, pilot lights. The operator can have a round and square plastic bezel. It is designed to fit in a standard 22mm cutout, ensuring compatibility when installing in pre-existing machinery. The contacts can be used for low load electrical contact and high power applications. Shake proof connection screws make periodic retightening unnecessary. A complete set of accessories to provide a solution for applications where exposure to high pressure cleaning, dust and extreme temperatures is an everyday occurrence. These harmony 22mm push buttons are used by machine manufacturers (automotive, textiles, timber) and control system panel builders. Certified and approved for meeting requirements throughout all continents: EN/IEC, UL, NEMA, CSA, CCC, Gost, JIS and many more. They have UL and CE markings and have ratings up to IP66 and IP69K.

Features

The ZB4BS844 is a high-performance, 40mm "Mushroom Head" Emergency Stop (E-Stop) operator from the Schneider Electric Harmony XB4 metal range. It features a Trigger Action design with a Turn-to-Release mechanism, ensuring that the machine stays stopped until the operator manually resets the button by twisting it.
This unit is engineered with "Trigger Action" (also known as "tease-proof") functionality. This means the internal electrical contacts will not change state until the button is fully latched in the depressed position. This prevents a machine from stopping and then immediately restarting if the button is only partially pushed, meeting strict ISO 13850 safety standards.
Built with a robust chromium-plated metal bezel, the ZB4BS844 is designed for the most demanding environments. It is rated IP66, IP67, IP69, and IP69K, making it completely dust-tight and resistant to high-pressure, high-temperature washdowns ideal for food processing, automotive, and heavy industrial applications.
The mushroom head is a vibrant, non-fading red, providing immediate visibility for operators. While this part number is the operator head only, it is designed to be paired with a yellow "Emergency Stop" legend plate and the ZB4BZ009 mounting collar to ensure it is clearly identifiable and compliant with global safety color-coding regulations.
As part of the modular XB4 system, this head requires a mounting collar (ZB4BZ009) and contact blocks (typically ZBE102 for Normally Closed/NC logic) to become a functional switch. Its "snap-fit" mounting system allows for quick assembly and easy replacement of the head without disturbing the underlying wiring.

Documentation & Downloads

Specifications

Key Specifications

Country of Origin	Czechia, France, United States

Physical Attributes

Cad Overall Depth	57 mm
Cad Overall Width	40 mm

Cad Overall Height	40 mm

Important Information Attributes

Persona Type Ids	BM9, EU, LC, OM, OM8, PB, SC, SI, VR
Market Segmentation Id	COMMERCIAL, INDUSTRIAL
Bezel Material	chromium plated metal, chromium plated metal
Electrical Composition Code	C7 4 single front mountingC8 4 single and double front mountingC11 3 single front mountingC15 1 single front mounting, C10 4 single and double front mounting
Operator Profile 1 Operator Profile	mushroom Ø 40 mm
Carbon Footprint Of The Distribution Phase [A4]	0.0094186913, 0 kg CO2 eq.
Carbon Footprint Of The Installation Phase [A5]	0 kg CO2 eq., 0.0003159341
Carbon Footprint Of The Use Phase [B2 B3 B4 B6]	kg CO2 eq., 0
Local Publishable Date	2026-03-26
Stocking Flag	Y
Weee Scope	Out
Eoli Availability Display	Yes
Reach Full Compliance Status	Free of Substances of Very High Concern above the threshold
Reach Compliance Directive	Free of Substances of Very High Concern above the threshold
Rohs Eur Status	Compliant
Rohs Eur Full Compliance Status	Compliant
China Rohs Label	1
Without Single Use Plastic	No
Tier Id	1
Function Option Id	STANDARD
Product Kit Identifier	N
Average Percentage Of Recycled Plastic Content	12 %
Device Short Name	ZB4
Group Of Product	emergency stop turn to release
Main Group	E-stop
Mechanical Durability	300000 cycles
Product Availability	Stock - Normally stocked in distribution facility
Protective Treatment	TH
Reset	turn to release
Sale Per Indivisible Quantity	1
Shock Resistance	30 gn 18 ms) half sine wave acceleration IEC 60068-2-2750 gn 11 ms) half sine wave acceleration IEC 60068-2-27
Sustainable Packaging	No
Type Of Operator	trigger action and mechanical latching
Operator Profile 1 Marking	unmarked
Database Version	2016-11
Pcr Version	PCR-ed3-EN-2015 04 02
Type Of Verification For The Pep	Independent internal review
Functional-unit Description	Emergency stop push button which helps to shut off machinery in an emergency situation when there is a risk of injury or the workflow requires stopping. Product meets the international standards as EN/IEC 60947-1 and EN/IEC 60204 -1 during 20 years.
Energy Model - Manufacturing [A1-a3]	Energy model used: Pisek, Czech Republic
Energy Model - Use [B6]	Electricity mix; AC; 120V; US
Recyclability Potential In %	59
Nbr. Of Units In Pkg.	1
Take-back	No
Customs Code	8538908180

Persona Type Names	Charge Point Operator, End User, Contractor, Original Equipment Manufacturer, OEM - Control Panelbuilder, Panel Builder, Electrician, System Integrator, IT Channel Partner
Market Segmentation	Commercial, Industrial
Customizable	no, 0
Operator Profile	red mushroom Ø 40 mm, unmarked, mushroom Ø 40 mm
Certificate Agency	DNV, UL Listed, LROS (Lloyds register of shipping), BV, CSA
Carbon Footprint Of The End-of-life Phase [C1 To C4]	0.0084807076, 0 kg CO2 eq.
Carbon Footprint Of The Manufacturing Phase [A1 To A3]	0.8 kg CO2 eq., 0.7709110833
Local Data Status	Publishable
Return Indicator	Y
Stock Policy	1
Scope Perimeter	At least in Europe
End Of Life Doc Ref	ENVEOLI2201004EN
Reach Full Compliance Status Id	NOT_CONTAINING_SVHC
Rohs Eur In Scope	No
Rohs Eur Conformity Date	1930
China Rohs In Scope	Yes
With Recycled Cardboard	No
Product Contributes To Saved And Avoided Emissions	No
Tier	1
Function Option	Standard
Average Percentage Of Recycled Metal Content	23 %
Compatibility Code	ZB4
Electrical Shock Protection Class	class I conforming to IEC 61140
Head Type	standard
Marking	unmarked
Mounting Diameter	22.5 mm
Product Or Component Type	head for emergency switching off push-button
Range Of Product	Harmony XB4
Returnability	Yes
Shape Of Signaling Unit Head	round
Software Version	EIME v5.9.3
Total Lifecycle Carbon Footprint	0.8 kg CO2 eq.
Vibration Resistance	5 gn (f= 2-500 Hz) conforming to IEC 60068-2-6
Pep Code	ENVPEP2201004EN
Pep Verification Date	2022-12-01
Psr Version	PSR-0005-ed2-EN-2016 03 29
Data Source	extrapolated product
Reference Lifetime In Y	20
Energy Model - Installation [A5]	Electricity mix; AC; 120V; US
Energy Model - End Of Life [C1-c4]	Electricity mix; AC; 120V; US
Cap/Operator Or Lens Colour	red
Package Weight(Lbs)	75.000 g
Warranty (In Months)	18

Environment Attributes Main

Ambient Air Temperature For Operation	-40-70 °C, -40-70 °C
Ip Degree Of Protection	IP66 IEC 60529, IP69, IP69K, IP67
Take Back	No
Recycled Metal Content At Cr Level	23 %
Toxic Heavy Metal Free	Yes
Carbon Footprint	0.7891264163
Environmental Disclosure	ENVPEP2201004EN
Packaging Made With Recycled Cardboard	No
Reach Free Of Svhc	Yes
Pep Code	ENVPEP2201004EN
Pcr Version	PCR-ed3-EN-2015 04 02
Type Of Verification For The Pep	Independent internal review

Ambient Air Temperature For Storage	-40-70 °C, -40-70 °C
Nema Degree Of Protection	NEMA 13, NEMA 4X, NEMA 4, NEMA 12, UL type 4X/13
Reach Free Shvc	Yes
China Rohs Regulation	X
Mercury Free	Yes
Circularity Profile	ENVEOLI2201004EN
Eu Rohs Directive	Compliant
Packaging Without Single Use Plastic	No
Reach Regulation	Free of Substances of Very High Concern above the threshold
Pep Verification Date	2022-12-01
Psr Version	PSR-0005-ed2-EN-2016 03 29