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Customers from more than 100 countries
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MARQUARDT

Why is Micro Switch called a micro switch ...

Because it switches uAmps? Not really. It’s more common to switch several Amps. Because of its size? It is quite questionable what is considered big and what is already small. Then why so?

Probably because the first producer was the American company called Micro Switch. And as these products were very popular, the name micro switch became a generic trademark for all producers.

The company Micro Switch was acquired by Honeywell in 1950. And Honeywell registered the trademark Micro Switch. Other manufacturers used the name Snap-Action Switch or Basic Switch.

But the question still remains why the founder of the company, Mr. Schulte, decided to name his company Micro Switch?

Because they switched micro-amps? Probably not since in 1937 the micro-amps did not even exist. Because of their miniature dimensions?

Probably yes, at that time they could be considered tiny.

And what exactly is that micro switch?

It is an electric switch (patented in 1932) that is actuated by very little physical force. Switching happens at specific positions of the actuator (not like other switches). Relatively small movement at the actuator button produces a relatively large movement at the electrical contacts, which occurs at high speed (regardless of the speed of actuation). Typical durability is from 1 to 10 millions of cycles. This durability is a natural consequence of the design.

Micro switches are not operated by person; it is always some moving part of the equipment. Common applications are detection (e.g. jammed paper in photocopier, the presence of material or product). Other application can be a limit switch (for control of machine tools) or door switch (e.g. fridge).

And which one do we love the most?

We like the Marquardt micro switches. the most. Why? Because it is that Marquardt that produces electronic keys for Mercedes, Volkswagen and other premium cars and that Marquardt that produces switches for blue Bosch electric tools. That’s why.

Marquardt has a nice range of micro switches. Three basic sizes - miniature (Series 1005 and 1080, width about 28mm), subminiature (Series 1050, width about 20mm) and ultra subminiature (Series 1055, width 13mm).

Then we choose the right terminals and the right type of actuator:

Terminals:
- Straight PCB pins
- Angled PCB pins
- Soldering eyelets
- Quick connect (Faston)
- Cables

Actuator:
 - Pin plunger
- Straight lever
- Roller lever
- Simulated roller
- Spring lever

What is important when using micro switches?

First of all, load size and type. Some types of load have much higher inrush current. E.g. relay has 5 times higher inrush current than nominal, motor 10 times, incandescent lamp 15 times and solenoid even 20 times. On the other hand, for switching small loads, do not use a micro switch for high currents. We recommend using micro switch with gold plated contacts.

For harsh environment (dust and moisture), please use micro switches with higher IP rating (up to IP67).

We recommend applying a contact protective circuit to extend contact durability, prevent noise, and suppress the generation of carbide or nitric acid due to arc. The use of a contact protective circuit may delay the response time of the load. Examples of such circuits:

-RC Circuit - in systems with power supply of 24-48V, it is effective to connect the RC circuit in parallel to the load. When the power supply voltage is 100-200V, then in parallel to the contacts (in this case when AC is switched, the load impedance must be lower than the R and C impedance)

-Varistor - the use is very similar to RC circuit, even with those conditions when in parallel to load or contacts. Varistor ensures that no high-voltage is imposed on the contacts.

-Diode - energy stored in the coil is changed into current by the diode connected in parallel to the load. Then the current flowing to the coil is consumed and Joule heat is generated by the resistance of the inductive load. The diode must withstand a peak inverse voltage 10 times higher than the circuit voltage and a forward current as high as or higher than the load current.

-Diode and Zener diode - this method will be effective if the reset time delay caused by the diode method is too long. Zener voltage for a Zener diode must be about 1.2 times higher than the power source.

Ensure that the operating body will work smoothly. The shape of it should be round or oblique - to prevent shocks to the actuator. And of course, operate the actuator of a hinge roller lever or simulated hinge lever type from the right (correct) direction.

Ensure that the stroke to the actuator is set not to exceed the total travel position. If not, the operating body may damage the actuator or the switch itself, and the stress applied to the moving spring inside the switch will increase and then, the durability of the switch may be deteriorated.

And some more details - not to tighten the screws too much - not to deform the body of a switch. Or when soldering, adjust the amount of solder so that the flux does not enter the switch, it can cause contact failure.

Try the Marquardt micro switches. Even a bad choice can move you forward. But it costs money and time. Maybe these recommendations will help you save some money and some time.

Check out our offer of Marquardt microswitches, we have added new types with different types of actuators.

If you need more information about the microswitches, or if you are interested in other MARQUARDT products, please do not hesitate to contact us at info@soselectronic.com

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Additional products

image type / description Ord.number kind manufacturer in stock External stock price/pc excl. VAT
1006.1201 MARQUARDT 1006.1201 new

Snap-Action Switch 1-(1) SPDT 10(4)A 400VAC Roller Lever F6,3

More info: 1006.1201.pdf

Tact switches

159468
S

MARQUARDT

in stock 390 pcs
-

1 pcs+ 3,25 €

10 pcs+ 2,84 €

50 pcs+ 2,49 €

200 pcs+ 2,32 €

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1006.1401 MARQUARDT 1006.1401 new

Snap-Action Switch 1-(1) SPDT 10(4)A 400VAC Straight Lever 35,7mm F6,3

More info: 1005_Ser.pdf

Tact switches

79715
S

MARQUARDT

in stock 199 pcs
-

1 pcs+ 4,33 €

10 pcs+ 3,98 €

25 pcs+ 3,66 €

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1005.1004 MARQUARDT 1005.1004

Snap-Action Switch 1-(1) SPDT 20(4)A 400VAC F6,3

More info: 1005.pdf

Tact switches

67639
S

MARQUARDT

in stock 294 pcs
-

1 pcs+ 2,66 €

5 pcs+ 2,40 €

20 pcs+ 2,24 €

400 pcs+ 1,72 €

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1006.0701 MARQUARDT 1006.0701

Snap-Action Switch 1-(1) SPDT 10(4)A 400VAC Roller Lever Solder Lugs

More info: 1005.pdf

Tact switches

70951
S

MARQUARDT

in stock 32 pcs
-

1 pcs+ 2,92 €

5 pcs+ 2,64 €

20 pcs+ 2,46 €

400 pcs+ 1,90 €

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1006.0901 MARQUARDT 1006.0901

Snap-Action Switch 1-(1) SPDT 10(4)A 400VAC Straight Lever Solder Lugs

More info: 1005.pdf

Tact switches

52994
S

MARQUARDT

in stock 323 pcs
-

1 pcs+ 2,89 €

20 pcs+ 2,43 €

100 pcs+ 2,13 €

200 pcs+ 2,06 €

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1006.1511 MARQUARDT 1006.1511

Snap-Action Switch 1-(1) SPDT 10(4)A 400VAC Roller Lever PCB R/A

More info: 1006.1511.pdf

Tact switches

213870
S

MARQUARDT

in stock 198 pcs
-

1 pcs+ 3,76 €

10 pcs+ 3,28 €

50 pcs+ 2,87 €

200 pcs+ 2,51 €

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1050.0103 MARQUARDT 1050.0103

Snap-Action Switch 1-(1) SPDT 10(1,5)A 250VAC Solder Lugs

More info: 1050.pdf

Tact switches

71289
S

MARQUARDT

in stock 74 pcs
-

1 pcs+ 2,39 €

5 pcs+ 2,17 €

20 pcs+ 2,02 €

500 pcs+ 1,54 €

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1050.0202 MARQUARDT 1050.0202

Snap-Action Switch 1-(1) SPDT 5A 250VAC Solder Lugs

More info: 1050.pdf

Tact switches

50953
S

MARQUARDT

in stock 116 pcs
-

1 pcs+ 1,99 €

2 pcs+ 1,68 €

10 pcs+ 1,52 €

50 pcs+ 1,40 €

500 pcs+ 1,11 €

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1050.1122 MARQUARDT 1050.1122

Snap-Action Switch 0-(1) SPST 5A 250VAC F2,8

More info: 1050.pdf

Tact switches

71288
S

MARQUARDT

in stock 98 pcs
-

1 pcs+ 1,99 €

2 pcs+ 1,74 €

10 pcs+ 1,57 €

50 pcs+ 1,38 €

500 pcs+ 1,15 €

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1050.2151 MARQUARDT 1050.2151

Snap-Action Switch 1-(1) SPDT 2(0,5)A 250VAC PCB

More info: 1050.pdf

Tact switches

71292
S

MARQUARDT

in stock 102 pcs
-

1 pcs+ 2,59 €

5 pcs+ 2,34 €

20 pcs+ 2,18 €

500 pcs+ 1,66 €

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1050.5202 MARQUARDT 1050.5202

Snap-Action Switch 1-(1) SPDT 5A 250VAC Straight Lever Solder Lugs

More info: 1050.pdf

Tact switches

71290
S

MARQUARDT

in stock 2016 pcs
Currently in stock 2716 pcs
Reserved for customers 700 pcs
Currently available 2016 pcs
If you are interested in bigger quantity that is currently available in stock, please contact our sales assistant or click on Get Quote.
-

1 pcs+ 2,26 €

2 pcs+ 2,19 €

10 pcs+ 1,98 €

20 pcs+ 1,91 €

400 pcs+ 1,46 €

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1050.5702 MARQUARDT 1050.5702

Snap-Action Switch 1-(1) SPDT 5A 250VAC Roller Lever Solder Lugs

More info: 1050.pdf

Tact switches

67959
S

MARQUARDT

in stock 173 pcs
-

1 pcs+ 2,74 €

5 pcs+ 2,48 €

20 pcs+ 2,31 €

400 pcs+ 1,78 €

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1055.0051 MARQUARDT 1055.0051

Snap-Action Switch 1-(1) SPDT 2A 24VDC Solder Lugs

Tact switches

213969
O

MARQUARDT

On request
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1006.1201 MARQUARDT  
1006.1201

Snap-Action Switch 1-(1) SPDT 10(4)A 400VAC Roller Lever F6,3

Tact switches

Ord. No.: 159468
Manufacturer: MARQUARDT
in stock 390 pcs
1 pcs+
10 pcs+
50 pcs+
200 pcs+
3,25 €
2,84 €
2,49 €
2,32 €
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1006.1401 MARQUARDT  
1006.1401

Snap-Action Switch 1-(1) SPDT 10(4)A 400VAC Straight Lever 35,7mm F6,3

Tact switches

Ord. No.: 79715
Manufacturer: MARQUARDT
in stock 199 pcs
1 pcs+
10 pcs+
25 pcs+
4,33 €
3,98 €
3,66 €
ORDER:
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1005.1004 MARQUARDT  
1005.1004

Snap-Action Switch 1-(1) SPDT 20(4)A 400VAC F6,3

Tact switches

Ord. No.: 67639
Manufacturer: MARQUARDT
in stock 294 pcs
1 pcs+
5 pcs+
20 pcs+
400 pcs+
2,66 €
2,40 €
2,24 €
1,72 €
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1006.0701 MARQUARDT  
1006.0701

Snap-Action Switch 1-(1) SPDT 10(4)A 400VAC Roller Lever Solder Lugs

Tact switches

Ord. No.: 70951
Manufacturer: MARQUARDT
in stock 32 pcs
1 pcs+
5 pcs+
20 pcs+
400 pcs+
2,92 €
2,64 €
2,46 €
1,90 €
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1006.0901 MARQUARDT  
1006.0901

Snap-Action Switch 1-(1) SPDT 10(4)A 400VAC Straight Lever Solder Lugs

Tact switches

Ord. No.: 52994
Manufacturer: MARQUARDT
in stock 323 pcs
1 pcs+
20 pcs+
100 pcs+
200 pcs+
2,89 €
2,43 €
2,13 €
2,06 €
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1006.1511 MARQUARDT  
1006.1511

Snap-Action Switch 1-(1) SPDT 10(4)A 400VAC Roller Lever PCB R/A

Tact switches

Ord. No.: 213870
Manufacturer: MARQUARDT
in stock 198 pcs
1 pcs+
10 pcs+
50 pcs+
200 pcs+
3,76 €
3,28 €
2,87 €
2,51 €
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1050.0103 MARQUARDT  
1050.0103

Snap-Action Switch 1-(1) SPDT 10(1,5)A 250VAC Solder Lugs

Tact switches

Ord. No.: 71289
Manufacturer: MARQUARDT
in stock 74 pcs
1 pcs+
5 pcs+
20 pcs+
500 pcs+
2,39 €
2,17 €
2,02 €
1,54 €
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1050.0202 MARQUARDT  
1050.0202

Snap-Action Switch 1-(1) SPDT 5A 250VAC Solder Lugs

Tact switches

Ord. No.: 50953
Manufacturer: MARQUARDT
in stock 116 pcs
1 pcs+
2 pcs+
10 pcs+
50 pcs+
500 pcs+
1,99 €
1,68 €
1,52 €
1,40 €
1,11 €
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1050.1122 MARQUARDT  
1050.1122

Snap-Action Switch 0-(1) SPST 5A 250VAC F2,8

Tact switches

Ord. No.: 71288
Manufacturer: MARQUARDT
in stock 98 pcs
1 pcs+
2 pcs+
10 pcs+
50 pcs+
500 pcs+
1,99 €
1,74 €
1,57 €
1,38 €
1,15 €
ORDER:
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1050.2151 MARQUARDT  
1050.2151

Snap-Action Switch 1-(1) SPDT 2(0,5)A 250VAC PCB

Tact switches

Ord. No.: 71292
Manufacturer: MARQUARDT
in stock 102 pcs
1 pcs+
5 pcs+
20 pcs+
500 pcs+
2,59 €
2,34 €
2,18 €
1,66 €
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1050.5202 MARQUARDT  
1050.5202

Snap-Action Switch 1-(1) SPDT 5A 250VAC Straight Lever Solder Lugs

Tact switches

Ord. No.: 71290
Manufacturer: MARQUARDT
in stock 2016 pcs
1 pcs+
2 pcs+
10 pcs+
20 pcs+
400 pcs+
2,26 €
2,19 €
1,98 €
1,91 €
1,46 €
ORDER:
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1050.5702 MARQUARDT  
1050.5702

Snap-Action Switch 1-(1) SPDT 5A 250VAC Roller Lever Solder Lugs

Tact switches

Ord. No.: 67959
Manufacturer: MARQUARDT
in stock 173 pcs
1 pcs+
5 pcs+
20 pcs+
400 pcs+
2,74 €
2,48 €
2,31 €
1,78 €
ORDER:
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1055.0051 MARQUARDT  
1055.0051

Snap-Action Switch 1-(1) SPDT 2A 24VDC Solder Lugs

Tact switches

Ord. No.: 213969
Manufacturer: MARQUARDT
ORDER:
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