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Brand: Schneider Electric
Schneider Electric XB5AS542 Harmony XB5 Emergency Stop Button
Description
XB5AS542 red 40 mm emergency stop button with turn-to-release latch
The XB5AS542 is a Schneider Electric product listed in the datasheet as: Complete emergency switching off push button, Harmony XB5, red Ø 40 pushbutton Ø22 mm latching turn release 1NC. The XB5AS542 is a complete emergency-stop button of the Harmony XB5 series: a red mushroom head of 40 mm, latching, turn to release, with one normally closed contact. The datasheet carries a lifecycle notice, so it is a spare and replacement item. Seven Star LLC supplies the XB5AS542 in Oman and the GCC as an independent supplier based in Muscat.
Reading the reference: XB5 is the plastic range, A marks the complete unit, S5 corresponds to the emergency stop head with turn-to-release operation, and 42 is the contact version with one NC contact. The datasheet title gives red 40 mm, 22 mm mounting, latching turn release, 1NC.
Technical specifications of the XB5AS542
| Parameter | Specification |
|---|---|
| Manufacturer / part number | Schneider Electric / XB5AS542 |
| Description | Complete emergency switching off push button, Harmony XB5, red Ø 40 pushbutton Ø22 mm latching turn release 1NC |
| Range of Product | Harmony XB5 |
| Product or Component Type | Complete emergency switching off push-button |
| Device short name | XB5 |
| Bezel material | Plastic |
| Fixing collar material | Plastic |
| Head type | Standard |
| Mounting diameter | 22 mm |
| Type of operator | mechanical latching |
| Reset | Turn to release |
| Operator profile | Red mushroom Ø 40 mm, unmarked |
| Contact operation | Slow-break |
| Connections – terminals | Screw clamp terminals, <= 2 x 1.5 mm² with cable end EN 60947-1; Screw clamp terminals, >= 1 x 0.22 mm² without cable end EN 60947-1 |
| Height | 43 mm |
| Width | 40 mm |
| Depth | 100 mm |
| Terminals description ISO n°1 | (11-12)NC |
| Contacts usage | Standard contacts |
| Positive opening | With EN/IEC 60947-5-1 appendix K |
| Operating travel | 1.5 mm NC changing electrical state; 4.3 mm total travel |
| Mechanical durability | 300000 cycles |
| Contacts material | Silver alloy (Ag/Ni) |
| Short-circuit protection | 10 A cartridge fuse gG EN/IEC 60947-5-1 |
| [Ith] conventional free air thermal | 10 A EN/IEC 60947-5-1 |
| [Ui] rated insulation voltage | 600 V 3EN 60947-1 |
| [Uimp] rated impulse withstand | 6 kV EN 60947-1 |
| [Ie] rated operational current | 3 A 240 V, AC-15, A600 EN/IEC 60947-5-1; 6 A 120 V, AC-15, A600 EN/IEC 60947-5-1; 0.1 A 600 V, DC-13, Q600 EN/IEC 60947-5-1 |
| Electrical durability | 1000000 cycles, AC-15, 2 A 230 V 3600 cyc/h 0.5 EN/IEC 60947-5-1 appendix C |
| Electrical reliability | Λ < 10exp(-6) 5 V, 1 mA in clean environment EN/IEC 60947-5-4; Λ < 10exp(-8) 17 V, 5 mA in clean environment EN/IEC 60947-5-4 |
| Ambient air temperature (operation or storage, as listed) | -40 to 70 °C |
| Overvoltage category | Class II conforming to IEC 60536 |
| IP degree of protection | IP66 IEC 60529; IP67; IP69; IP69K |
| IK degree of protection | IK03 conforming to IEC 50102 |
| Product Certifications | LROS (Lloyds register of shipping); GL; UL Listed; DNV; CSA; BV |
| Vibration resistance | 5 gn (f= 2 to 500 Hz) conforming to IEC 60068-2-6 |
| Shock resistance | 30 gn 18 ms half sine wave acceleration IEC 60068-2-27; 50 gn 11 ms half sine wave acceleration IEC 60068-2-27 |
Function and contact data of the XB5AS542
Rated operational current: 3 A 240 V, AC-15, A600 EN/IEC 60947-5-1; 6 A 120 V, AC-15, A600 EN/IEC 60947-5-1; 0.1 A 600 V, DC-13, Q600 EN/IEC 60947-5-1. Mechanical durability: 300000 cycles. Electrical durability: 1000000 cycles, AC-15, 2 A 230 V 3600 cyc/h 0.5 EN/IEC 60947-5-1 appendix C.
An emergency-stop device must open its contact positively and stay latched until the operator resets it deliberately. The NC contact is wired in series with the control circuit or a safety relay so that a broken wire is also a stop.
Safety circuit context of the XB5AS542
The button is normally connected to a Preventa safety relay or a safety controller. Use of a single NC contact needs a risk assessment, and a machine requiring higher performance level may need two contacts or monitored contacts.
Because this reference is discontinued per the datasheet, plan a replacement in the same family and confirm the successor before ordering.
The datasheet downloaded for this page carries lifecycle notices: Discontinued on: Jan 21, 2021. For a plant that already runs this reference that makes the XB5AS542 a spare-and-replacement item, and it is worth fixing the stock level and the long-term successor plan at the same time. We can discuss compatible alternatives once we know the installation.
Selection checklist for the XB5AS542
- Head size and colour: red 40 mm mushroom.
- Release: turn to release, latching.
- Contacts: 1 NC for this reference.
- Mounting hole 22 mm.
- Performance level required by the machine.
- Lifecycle: replacement or spare.
Wiring and testing of the XB5AS542
Wire the NC contact in the emergency stop chain, test that pressing the head opens the contact and that the control circuit drops. Release only after the hazard is cleared.
Include the emergency stop in the periodic test plan of the machine.
Typical applications of the XB5AS542 in Oman and the GCC
In Oman and the GCC emergency stops are fitted on conveyors, pump skids, compressor packages and workshop machinery, including in outdoor stations where weather protection must be checked.
Dimensions, environment and approvals of the XB5AS542
For the XB5AS542, plan the mounting space from the datasheet: 40 mm (W) x 43 mm (H) x 100 mm (D). Mounting, derating and enclosure choices follow the environmental data below, which should be compared with the actual panel temperature and the dust and humidity of the site in Oman and the GCC.
Ambient temperature limits in the datasheet: -40 to 70 °C. Ingress protection: IP66 IEC 60529; IP67; IP69; IP69K. Vibration resistance: 5 gn (f= 2 to 500 Hz) conforming to IEC 60068-2-6. Shock resistance: 30 gn 18 ms half sine wave acceleration IEC 60068-2-27; 50 gn 11 ms half sine wave acceleration IEC 60068-2-27. Certifications listed for this reference: LROS (Lloyds register of shipping); GL; UL Listed; DNV; CSA; BV.
Information to send with an RFQ for the XB5AS542
- Full reference and quantity required
- Existing equipment, panel or rack it must fit
- Supply voltage, load or signal details of the application
- Required delivery location and timing
- Whether a spare, a replacement or a new installation
Documents and quotation
A datasheet for this product is attached on this page. It lists the electrical, mechanical and environmental data summarised above.
Send us the part number, quantity and application and we will confirm availability and a quotation. Seven Star LLC is an independent supplier in Muscat and does not represent itself as an official channel of the manufacturer.
Datasheets & Documents
- Datasheet Schneider Electric XB5AS542 Datasheet Download
Reviews (0)
About brand
Schneider Electric is the French group for energy management and industrial automation: low and medium voltage switchgear and circuit breakers, motor control, drives, PLCs, power monitoring, UPS systems and building management. Its history goes back to 1836, when the brothers Adolphe and Eugène Schneider took over the iron and steel works at Le Creusot in Burgundy. Over the 20th century the company left steel and heavy engineering and became an electrical group through acquisitions such as Merlin Gerin, Télémécanique, Square D and Modicon. Its head office is in Rueil-Malmaison near Paris, and its shares are listed on Euronext Paris.
Schneider Electric company profile
| Origins | 1836, Le Creusot, France: Adolphe and Eugène Schneider take over the Le Creusot foundry |
|---|---|
| Headquarters | Rueil-Malmaison (Paris region), France |
| Ownership | Public company listed on Euronext Paris |
| Key acquisitions | Télémécanique (1988), Square D (1991), Merlin Gerin (1992), Modicon (1997), APC (2007), Invensys (2014); majority owner of AVEVA software |
| Brand names still in use | Acti9, ComPacT and MasterPacT breakers, TeSys motor control, Altivar drives, Altistart soft starters, Modicon PLCs, Harmony control components, PowerLogic and Easergy protection and metering, APC UPS, EcoStruxure software platform |
| Product families | Low voltage distribution, medium voltage switchgear and protection relays, motor control and drives, PLCs and HMIs, power meters, UPS and cooling, enclosures, building automation and energy software |
Milestones
- 1836: The Schneider brothers acquire the Le Creusot works; the business grows in steel, locomotives and heavy engineering.
- 1975: First investment in Merlin Gerin, a French maker of electrical distribution equipment.
- 1988–1992: Télémécanique, Square D (USA) and Merlin Gerin join the group, making it an electrical specialist.
- 1997: Modicon, the company behind the first programmable logic controller, joins the group.
- 1999: The group takes the name Schneider Electric.
- 2007 and 2014: APC (UPS and data centre power) and Invensys (process automation) are acquired.
Choosing Schneider Electric breakers and motor control
Circuit breakers are chosen by current and breaking capacity. Acti9 miniature circuit breakers (iC60, C120) protect final circuits up to 125 A. ComPacT NSX molded case breakers cover about 16 to 630 A, and the letter after the frame size sets the breaking capacity: B, F, N, H, S, L from lowest to highest. MasterPacT air circuit breakers are used as main incomers on large switchboards. For motors, a TeSys contactor with an LRD overload relay or a GV2 motor circuit breaker suits direct starting, an Altistart soft starter reduces starting current, and an Altivar drive controls speed. The breaking capacity must always be at least the prospective short-circuit current at the point of installation.
Where Schneider Electric products are used
In Oman and the GCC, Schneider Electric equipment is found in main and sub-main switchboards of commercial and residential buildings, motor control centres in water, oil and gas and industrial plants, substations protected by Sepam and Easergy relays, data centres powered by Galaxy and APC UPS systems, and buildings controlled by EcoStruxure Building Operation.
APC by Schneider Electric: UPS and critical power
Since 2007, APC has been part of Schneider Electric and is now its product brand for uninterruptible power supplies, replacement batteries, battery packs, network management cards and rack power distribution. Our APC catalogue covers Smart-UPS line-interactive and on-line models, Easy UPS On-Line, the modular Symmetra LX, RM and PX ranges, Silcon three-phase systems and their spare part kits, and the RBC cartridges that keep them running. Schneider Electric breakers, drives and PLCs can be quoted together with APC UPS systems in one request.
Schneider Electric products we list
| Family | Examples |
|---|---|
| Circuit breakers | Acti9 iC60N, C120N, NSX100F, NSX250N, NSX630, EasyPact EZC, MasterPacT MTZ1, MasterPacT NW |
| Motor control | TeSys Deca LC1D, TeSys F, LRD overload relay, GV2ME08, Altistart 22, Altistart 480 |
| Drives | Altivar 12, Altivar 320, ATV340, Altivar Process 630, ATV930, Lexium 32 servo |
| PLCs, HMIs and relays | Modicon M221, M241, M580 BMEP582040, Zelio Logic, Magelis HMISTU655 |
| Protection, metering and power | Sepam series 20, Easergy P3U30, MiCOM P139, PM5560, iEM3255, Galaxy VS UPS |
Ordering Schneider Electric products: what we need
Send the commercial reference from the label (for example LC1D18M7 or ATV320U22N4C). For breakers, confirm the rated current, number of poles, breaking capacity and trip unit. For contactors, give the coil voltage. For drives, give the motor power and supply voltage. APC products are listed on their own brand page.
Facts checked against Schneider Electric's published company history, October 2026.
Browse Schneider Electric products by category: Circuit Breaker, Electrical & Power Modules, AC Drives, PLC & I/O Cards, Metering Systems, UPS and Batteries.
FAQ
Questions about the Schneider Electric XB5AS542 Harmony XB5 Emergency
Answers from our engineering team on installation, compatibility and integration.
01What ingress protection does the XB5AS542 list?
Stated as IP66 IEC 60529; IP67; IP69; IP69K.
02Which product range does the XB5AS542 belong to?
The datasheet lists the range as Harmony XB5.
03What is the device short name of the XB5AS542?
The datasheet gives XB5.
04What mechanical durability does the XB5AS542 list?
Stated as 300000 cycles.
05What are the dimensions of the XB5AS542?
The datasheet gives a width of 40 mm; see the table for height and depth.
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