AB6-A 16mm emergency stop switch with red latching mushroom head

AB6-A 16mm Emergency Stop Switch - Latching Mushroom Head, 1NO 1NC

$8.99 NZD
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AB6-A 16mm emergency stop switch with red latching mushroom head
  • AB6-A 16mm emergency stop switch with red latching mushroom head
  • AB6-A 16mm emergency stop switch side view showing body marked AC 250V 3A DC 30V 5A and spade terminals
  • AB6-A 16mm emergency stop switch rear view showing the blue contact block and mounting plate
  • AB6-A 16mm emergency stop switch contact block close up with NC, NO and C terminals and plus and minus lamp tabs
  • AB6-A 16mm emergency stop switch disassembled: mushroom head, body, anti-rotation plate and mounting nut
  • AB6-A 16mm emergency stop switch dimension drawing: 23mm head, 47mm overall length, 33mm body, 7mm terminals
AB6-A 16mm Emergency Stop Switch - Latching Mushroom Head, 1NO 1NC
SKU: SW-ESTOP-16MM-1NO1NC

AB6-A 16mm Emergency Stop Switch - Latching Mushroom Head, 1NO 1NC

$8.99 NZD
Dispatch: Within 24 hours 7-day dispatch, excluding public holidays

NZ Post: 1-2 days urban · 2-4 days rural

Shipping from $5.99 urban / $9.99 rural.

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A 16mm panel-mount latching stop switch with a red mushroom head. Press it and the button locks down; twist the head clockwise to release it. One changeover contact on C / NO / NC tabs, silver-alloy contacts, an IP65 front face once panel-mounted, and a drop-in fit for a 16mm cutout. Built for hobby machines, workshop benches and prototype control panels. It carries no stated safety certification, so please don't make it the only thing standing between an operator and a moving machine.

  • Self-locking head, twist clockwise to release
  • 1NO + 1NC changeover on a shared common
  • Rated 3A at 250VAC, 5A at 30VDC
  • Silver-alloy contacts, 4µm cladding
  • IP65 front face, pollution degree III
  • 23mm mushroom head, 47mm overall length
  • 2.8mm spade tabs, up to 0.75mm² wire
  • Operating range -25°C to +55°C

Specifications

ModelAB6-A (body marked AC 250V 3A / DC 30V 5A)
TypeLatching (self-locking) mushroom stop switch
Panel cutout16mm diameter
Mushroom head23mm diameter
Overall length47mm, head to terminal tips
Body below head33mm
Terminal tabs7mm long
Depth behind panelAbout 30mm, plus clearance for the wiring
ActionPush to latch, twist clockwise to release
Contacts1NO + 1NC changeover, sharing a common (C / NO / NC)
Contact materialSilver / silver alloy, 4µm cladding
Terminals2.8 × 0.5mm spade / solder tabs
Max wire size0.75mm² copper (solder wire 2 × 0.8mm)
Max voltage250V AC / 30V DC
Max current3A AC / 5A DC
Thermal current5A conventional
Dielectric strength2000V AC 50Hz 1 min between poles and to lamp terminal; 1000V same pole
Insulation resistance≥100MΩ
Contact resistance≤30mΩ
IP ratingIP65 front face (rear terminals unsealed - mount the back inside an enclosure)
Pollution degreeIII
Operating temperature-25°C to +55°C
Humidity45-85% RH, no condensation
Altitude≤2000m
Vibration50Hz, approx. 1.2mm amplitude
Shock>10g
Mechanical life≥100,000 operations
Electrical life≥50,000 operations at rated load
Solder heat resistance230°C for no more than 3 seconds
Lamp terminals+ and - present on the contact block; no lamp specified for this variant
Body materialPlastic
Safety certificationNone stated by the supplier - we make no claim of ISO 13850 or IEC 60947-5-5 compliance
Full technical datasheet PDF

What's in the box

1×
AB6-A latching mushroom stop switch

Mushroom head, contact block and panel mounting hardware.

Great for

Hobby 3D printers and laser cutters
Home workshop CNC routers and mills
Workshop bench power cutoff
Robotics and go-kart builds
Test rigs and prototype control panels
Any panel needing a latching push-to-stop button

Wiring & getting started

  1. Drill a 16mm hole

    Mount the switch through the panel and secure it with the supplied nut and anti-rotation plate. Allow about 30mm of depth behind the panel for the body and terminals, plus room for the wiring to leave the tabs.

  2. Wire the NC contact

    Run C and NC in series with your machine's enable signal or power. NC is closed at rest and opens when the button latches down, so a broken wire opens the circuit too rather than hiding the fault.

  3. Crimp or solder to the tabs

    Terminals are 2.8 × 0.5mm tabs taking up to 0.75mm² wire. Use 2.8mm crimp spades, or solder at no more than 230°C for under 3 seconds.

  4. Check your ratings, then test it

    3A at 250VAC or 5A at 30VDC. For anything heavier, switch a contactor or relay coil instead of the load. Press the button, confirm the machine actually stops, twist to release, then reset your controller.

Please note: This is a latching stop switch sold for hobby, workshop and prototype use. The supplier states no safety certification for it and we make no claim of ISO 13850 or IEC 60947-5-5 compliance, so it shouldn't be the sole protective device on machinery that can cause injury - use a certified safety component for that. The IP65 rating covers the front face only, so the rear of the switch belongs inside an enclosure. Mains AC wiring must be carried out by a licensed electrician to local standards. Requires a 16mm panel cutout.

Frequently Asked Questions

Answers to the questions buyers ask most.

How do I reset the button after pressing it?
Twist the mushroom head clockwise until it clicks and pops back up. It does not need to be pulled. You will usually also need to reset or restart your machine's controller before it will run again.
Should I wire the NO or the NC contact?
Use NC for a stop function. It is closed at rest and opens when the button latches down, so a broken wire or loose terminal opens the circuit too rather than hiding the fault. Use NO only if you need something to switch on when the button is pressed.
What size hole do I need to drill, and how much room does it need behind the panel?
16mm diameter. The switch mounts through the panel and secures with the supplied nut and anti-rotation plate. Allow about 30mm of depth behind the panel for the body and terminals, plus a little more for the wiring leaving the tabs. The supplier does not specify a maximum panel thickness.
Is it suitable for outdoor or wet environments?
The IP65 front face handles coolant spray, oil mist and washdown once the switch is mounted in a panel. It is not rated for submersion, and the rear terminals are not sealed, so the back of the switch needs to sit inside an enclosure. In short: the front can get wet, the back cannot.
Is this a certified safety component?
No. It carries no safety certification and we make no claim of compliance with ISO 13850 or IEC 60947-5-5. It has no certified positive-opening contact mechanism, so do not rely on it as the only protective device on machinery that can injure someone. It is sold for hobby, workshop and prototype use.
Can it switch mains power directly?
It is rated 3A at 250VAC, so it can switch small mains loads, but mains wiring must be carried out by a licensed electrician to local standards. For anything heavier than 3A, use it to switch a contactor or relay coil instead of the load itself.

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I'm Lukas, an engineering student and maker based in Te Awamutu. NZN grew out of a CNC build that dragged on for months because every missing cable, bolt or electronic part meant another overseas order. I started the shop so Kiwi makers can spend more time building and less time waiting for the next parcel.

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