£43.19

Schneider Electric , Harmony, ZB4BS944, Emergency stop head, switching off, metal, red mushroom Ø40, Ø22, trigger latching key release

Red, ZB4BS944

Price data last checked 133 day(s) ago - refreshing...

View at Amazon

We'll watch every seller, every day. One email when your price arrives.

Same price for 23 weeks. Today is much like next week.

£43 for 163 days straight · last change was Aug 2025

NEW HERE?

Amazon shows you one price. We show you all of them.

Tosheroon watches Amazon prices so you don't have to. Every product on Amazon has a price history — we make it visible. Set the price you'd actually pay, and we'll email you the second it gets there. No app, no account, one email.

WHAT'S ON THIS PAGE

↓ Price chart
when this has been cheap or pricey
↓ Forecast
where the price is heading next
↓ Statistics
all-time high & low, recent range
↑ Price alert
name your number, we'll email you

Price History & Forecast

Grey patches = out of stock. Cheaper = lower on the chart. Hover for exact prices.

Last 598 days • 598 data points (No recent data available)

Historical
Generating forecast...
£49.99 £16.71 £23.97 £31.24 £38.50 £45.75 £53.02 07 June 2024 03 November 2024 01 April 2025 28 August 2025 25 January 2026

Price Distribution

Price distribution over 598 days • 8 price levels

Days at Price
Current Price
35 days 69 days 18 days 16 days 38 days 360 days · current 42 days 20 days 0 90 180 270 360 £20 £36 £37 £38 £40 £43 £44 £50 Days at Price

Price Analysis

Most common price: £43 (360 days, 60.2%)

Price range: £20 - £50

Price levels: 8 different prices over 598 days

Description

This Harmony XB4, Emergency stop 40mm mushroom red button head operates with a latched key-to-release (key no.455) mechanism. This emergency stop / shutdown button head, is easily combined with contact blocks and installed into standard 22mm diameter cut-outs and connected with simple screw-clamp connections. It is clearly distinguishable visually at a distance thanks to a clear color and a prominent 40mm mushroom shape. It is impact resistant, dust resistant, water resistant and vibration resistant thanks to its IP66 / IP67 / IP69 / IP69K. It has a metal bezel, this makes it Ideal for applications requiring high impact and vibration resistance. It is designed to fit in a standard 22mm cutout, ensuring compatibility when installing in pre-existing machinery. Secure machine and system operation with a key, only available to authorized operators. Its wide range of operating temperatures from -40°C to 70°C allows versatility in usage of product.

Key Features

Progress with confidence designed for industry

Flexibility and a robust construction

An ingenious locking system consisting of a snap-fit head and body, tightened with a single screw, ensures easy yet secure mounting

Product Specifications

Barcode

No barcode data available

Similar Products You Might Like

Schneider Electric, Harmony, ZB4BT2, Black Ø40 mushroom pushbutton head Ø22 latching push-pull
98% match

Schneider Electric, Harmony, ZB4BT2, Black Ø40 mushroom pushbutton head Ø22 latching push-pull

Schneider Electric

£53.69 27 Jan 2026
Schneider Electric Harmony XB5 - Emergency Stop Push Button Switch, Plastic, 40 mm Mushroom, Trigger Latching Key Release, 1NO + 1NC, 22 mm Mount, XB5AS9445, Red
97% match

Schneider Electric Harmony XB5 - Emergency Stop Push Button Switch, Plastic, 40 mm Mushroom, Trigger Latching Key Release, 1NO + 1NC, 22 mm Mount, XB5AS9445, Red

Schneider Electric

£44.02 25 Jan 2026
Schneider Electric - Harmony XB4 Illuminated Push Button, Green Flush, 22mm, Spring Return, Plain Lens, 1NO + 1NC, 110-120V, XB4BW13G5
97% match

Schneider Electric - Harmony XB4 Illuminated Push Button, Green Flush, 22mm, Spring Return, Plain Lens, 1NO + 1NC, 110-120V, XB4BW13G5

Schneider Electric

£32.79 23 Jan 2026
Schneider Electric, Harmony, ZB4BG7, Key Switch
97% match

Schneider Electric, Harmony, ZB4BG7, Key Switch

Schneider Electric

£42.52 20 Apr 2026
Schneider Electric Harmony XB4 - Emergency Stop Push Button Switch, Metal, 40 mm Mushroom, Trigger Latching Key Release, 1NO + 1NC, 22 mm Mount, XB4BS9445, Red
97% match

Schneider Electric Harmony XB4 - Emergency Stop Push Button Switch, Metal, 40 mm Mushroom, Trigger Latching Key Release, 1NO + 1NC, 22 mm Mount, XB4BS9445, Red

Schneider Electric

£47.02 23 Jan 2026
Schneider Electric Illuminated push button, Harmony XB5, plastic, flush, green, 22mm, universal LED, plain lens, 1NO + 1NC, 110...120V AC
97% match

Schneider Electric Illuminated push button, Harmony XB5, plastic, flush, green, 22mm, universal LED, plain lens, 1NO + 1NC, 110...120V AC

Schneider Electric

£41.99 29 Jan 2026
Schneider Electric Harmony XB5 - Emergency Stop Push Button Switch, Plastic, 40 mm Mushroom, Trigger Latching Push-Pull, 1NO + 1NC, 22 mm Mount, XB5AT845, Red
97% match

Schneider Electric Harmony XB5 - Emergency Stop Push Button Switch, Plastic, 40 mm Mushroom, Trigger Latching Push-Pull, 1NO + 1NC, 22 mm Mount, XB5AT845, Red

Schneider Electric

£43.49 30 Jan 2026
Schneider Electric Harmony XB4 - Emergency Stop Push Button Switch, Metal, 40 mm Mushroom, Trigger Latching Turn to Release, 2NC, 22 mm Mount, XB4BS8444, Red
97% match

Schneider Electric Harmony XB4 - Emergency Stop Push Button Switch, Metal, 40 mm Mushroom, Trigger Latching Turn to Release, 2NC, 22 mm Mount, XB4BS8444, Red

Schneider Electric

£33.02 25 Jan 2026
Schneider Electric Harmony XB5 - Emergency Stop Push Button Switch, Plastic, 40 mm Mushroom, 1NO + 1NC, 22 mm Mount, XB5AS8445, Red with 1NO, 22 mm Mount, Flush Operator Profile, XB5AA61, Blue
97% match

Schneider Electric Harmony XB5 - Emergency Stop Push Button Switch, Plastic, 40 mm Mushroom, 1NO + 1NC, 22 mm Mount, XB5AS8445, Red with 1NO, 22 mm Mount, Flush Operator Profile, XB5AA61, Blue

Schneider Electric

£41.38 11 Dec 2025
Schneider Electric Illuminated push button, Harmony XB5, plastic, orange flush, 22mm, universal LED, plain lens, 1NO + 1NC, 230...240V AC
96% match

Schneider Electric Illuminated push button, Harmony XB5, plastic, orange flush, 22mm, universal LED, plain lens, 1NO + 1NC, 230...240V AC

Schneider Electric

£47.22 31 Jan 2026
Schneider Electric Empty enclosure, Harmony XALD, XALK, plastic, dark grey lid, for push button 22 mm, 5 cut outs
96% match

Schneider Electric Empty enclosure, Harmony XALD, XALK, plastic, dark grey lid, for push button 22 mm, 5 cut outs

Schneider Electric

£49.53 29 Jan 2026
Schneider Electric Harmony XB5 - Illuminated Selector Switch, Plastic, 2 Positions, Stays Put, Standard handle, 1NO + 1NC, 24 V AC/DC, 22 mm Mount, XB5AK125B5, Orange
96% match

Schneider Electric Harmony XB5 - Illuminated Selector Switch, Plastic, 2 Positions, Stays Put, Standard handle, 1NO + 1NC, 24 V AC/DC, 22 mm Mount, XB5AK125B5, Orange

Schneider Electric

£32.52 25 Jan 2026
Schneider Electric Illuminated push button, Harmony XB5, plastic, blue flush, 22mm, universal LED, plain lens, 1NO + 1NC, 230...240V AC
96% match

Schneider Electric Illuminated push button, Harmony XB5, plastic, blue flush, 22mm, universal LED, plain lens, 1NO + 1NC, 230...240V AC

Schneider Electric

£47.22 01 Feb 2026
Schneider Electric, Harmony, ZB5AS944, Emergency stop head, switching off, plastic, red mushroom Ø40, Ø22, trigger latching key release
96% match

Schneider Electric, Harmony, ZB5AS944, Emergency stop head, switching off, plastic, red mushroom Ø40, Ø22, trigger latching key release

Schneider Electric

£41.63 27 Jan 2026
Schneider Electric Harmony XB4 - Illuminated Push Button Switch, Metal, Spring Return, 1NO + 1NC, 230…240 V AC, 22 mm Mount, Flush Operator Profile, XB4BW35M5, Orange
96% match

Schneider Electric Harmony XB4 - Illuminated Push Button Switch, Metal, Spring Return, 1NO + 1NC, 230…240 V AC, 22 mm Mount, Flush Operator Profile, XB4BW35M5, Orange

Schneider Electric

£33.52 08 Dec 2025
Schneider Electric Harmony XB4, Emergency stop switching off, metal, red mushroom Ø40, Ø22, trigger latching key release, 1 NC
96% match

Schneider Electric Harmony XB4, Emergency stop switching off, metal, red mushroom Ø40, Ø22, trigger latching key release, 1 NC

Schneider Electric

£44.75 29 Jan 2026
Schneider Electric - Harmony XB4 Illuminated Selector Switch, Flush Mounted, 30mm, Integral LED, Plain Lens, 1NO + 1NC, 230V AC, XB4FW35M5, Orange
96% match

Schneider Electric - Harmony XB4 Illuminated Selector Switch, Flush Mounted, 30mm, Integral LED, Plain Lens, 1NO + 1NC, 230V AC, XB4FW35M5, Orange

Schneider Electric

£34.02 01 Feb 2026
Schneider Electric Harmony XB4 - ATEX D, Push button, metal, projecting, black, Ø22, spring return, booted, unmarked, 1 NO, ATEX
96% match

Schneider Electric Harmony XB4 - ATEX D, Push button, metal, projecting, black, Ø22, spring return, booted, unmarked, 1 NO, ATEX

Schneider Electric

£57.71 03 Feb 2026
Schneider Electric - Harmony XB4 Illuminated Selector Switch, Flush Mounted, 30mm, Integral LED, Plain Lens, 1NO + 1NC, 24V AC/DC, XB4FW36B5, Blue
96% match

Schneider Electric - Harmony XB4 Illuminated Selector Switch, Flush Mounted, 30mm, Integral LED, Plain Lens, 1NO + 1NC, 24V AC/DC, XB4FW36B5, Blue

Schneider Electric

£33.53 23 Feb 2026
Schneider Electric Illuminated selector switch, Harmony XB5, grey plastic, red handle, 22mm, 2 positions, universal LED, 1NO + 1NC, 24V AC DC
96% match

Schneider Electric Illuminated selector switch, Harmony XB5, grey plastic, red handle, 22mm, 2 positions, universal LED, 1NO + 1NC, 24V AC DC

Schneider Electric

£48.70 26 Jan 2026
Schneider Electric Illuminated selector switch, Harmony XB5, grey plastic, orange handle, 22mm, universal LED, 2 positions, 1NO + 1NC, 230...240V AC
96% match

Schneider Electric Illuminated selector switch, Harmony XB5, grey plastic, orange handle, 22mm, universal LED, 2 positions, 1NO + 1NC, 230...240V AC

Schneider Electric

£61.98 31 Jan 2026
Schneider Electric - Harmony XVB Universal Illuminated Unit For Modular Tower Lights, Plastic, Ø70, Steady, Integral LED, 24V AC/DC, XVBC2B5, Orange
96% match

Schneider Electric - Harmony XVB Universal Illuminated Unit For Modular Tower Lights, Plastic, Ø70, Steady, Integral LED, 24V AC/DC, XVBC2B5, Orange

Schneider Electric

£69.57 10 Feb 2026
Schneider Electric Illuminated selector switch, Harmony XB5, grey plastic, orange handle, 22mm, universal LED, 3 positions, 1NO + 1NC, 24V AC DC
96% match

Schneider Electric Illuminated selector switch, Harmony XB5, grey plastic, orange handle, 22mm, universal LED, 3 positions, 1NO + 1NC, 24V AC DC

Schneider Electric

£40.25 30 Jan 2026
Schneider Electric Harmony XB4 - Illuminated Selector Switch, Metal, 2 Positions, Stays Put, Standard handle, 1NO + 1NC, 24 V AC/DC, 22 mm Mount, XB4BK124B5, Red
96% match

Schneider Electric Harmony XB4 - Illuminated Selector Switch, Metal, 2 Positions, Stays Put, Standard handle, 1NO + 1NC, 24 V AC/DC, 22 mm Mount, XB4BK124B5, Red

Schneider Electric

£34.02 26 Jan 2026