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MK17 Reed Sensor

Description

MK17 are magnetically operated Reed proximity sensors for SMD mounting.

  • Lead design 1: Flat, straight leads for PCB mounting.
  • Lead design 2: Flat, bent SMD leads.
  • Lead design 3: J lead

The sensors are supplied taped & reeled according to IEC 286 / part 3 suitable for auto-placement. The special features of this series are the small dimensions of only 12.5 x 2.1 x 2.1mm and the simple internal structure (low cost version).

RoHS compliant product


Features

  • Two operate sensitivities available
  • Tape and Reel available
  • Excellent for low power operations
  • No external power required for sensor operation

Applications

  • Electronic PCB's where all components are surface mounted
  • No power-requirement sensor for low power applications
  • Telecommunication applications
  • Hook switch in mobile and hard wired phones
  • Switching element in microphones

Specification

Contact Form 1A
Rated Power (W) 0 to 10
Switching Voltage (VDC) 0 to 100
Switching Current (A) 0 to 0.5
Carry Current (A) 0 to 1.25
Breakdown Voltage (Minimum VDC) 100 to 300
Avail. Operate Range (AT) 10 to 40

Part Search


Product search MK17 SMD Reed Switches
No. / Desc.: Pull-In excitation (Reference value):
Contact-Form: Contact Rating [W/VA]:
Switching Voltage [V]: Switching Current [A]:
total length - SMD:  
 
Item no.
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Description
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Contact - form
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total length - SMD
MM
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Contact rating
W
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Switching voltage
VDC
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Switching current
A
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Pull- In excitation (Reference value)
AT
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Enquiry 9171009032 9171009032 MK17-B-3 BulkA - NO12.5 MM10 W100 V0.5 A10-15 AT
Enquiry 9171009012 9171009012 MK17-B-1 BulkA - NO12.5 MM10 W100 V0.5 A10-15 AT
Enquiry 9171009033 9171009033 MK17-C-3 BulkA - NO12.5 MM10 W100 V0.5 A15-20 AT
Enquiry 9171800013 9171800013 MK17-C-1A - NO12.5 MM10 W100 V0.5 A15-20 AT
Enquiry 9171800023 9171800023 MK17-C-2A - NO12.5 MM10 W100 V0.5 A15-20 AT
Enquiry 9171800022 9171800022 MK17-B-2A - NO12.5 MM10 W100 V0.5 A10-15 AT
Enquiry 9171000035 9171000035 MK17-E-3A - NO12.5 MM10 W100 V0.5 A25-30 AT
Enquiry 9171000034 9171000034 MK17-D-3A - NO12.5 MM10 W100 V0.5 A20-25 AT
Enquiry 9171000015 9171000015 MK17-E-1A - NO12.5 MM10 W100 V0.5 A25-30 AT
Enquiry 9171000014 9171000014 MK17-D-1A - NO12.5 MM10 W100 V0.5 A20-25 AT
Enquiry 9171000024 9171000024 MK17-D-2A - NO12.5 MM10 W100 V0.5 A20-25 AT
Enquiry 9171000025 9171000025 MK17-E-2A - NO12.5 MM10 W100 V0.5 A25-30 AT
Enquiry 9171000033 9171000033 MK17-C-3A - NO12.5 MM10 W100 V0.5 A15-20 AT
Enquiry 9171000032 9171000032 MK17-B-3A - NO12.5 MM10 W100 V0.5 A10-15 AT
Enquiry 9171000012 9171000012 MK17-B-1A - NO12.5 MM10 W100 V0.5 A10-15 AT

Literature

Handling & Precautions

Applications

Medical

Medical

Camera Pill

Clogged Arteries

Glucose Monitor

Hearing Aid

Hospital Bed Position

Implantable Pacemaker

Safety & Security

Test & Measurement

Test & Measurement

Linear Distance

Stock Check


Stock Check

Item no. Distributor Region Quantity Cart RFQ Inventory Date
MK17-B-1ONLINECOMPONENTS.COMUSA1533RFQ7/26/2014 3:15:00 AM
MK17-B-1Master ElectronicsUSA1533RFQ7/26/2014 12:08:00 AM
MK17-B-2ONLINECOMPONENTS.COMUSA2144RFQ7/26/2014 3:15:00 AM
MK17-B-2Mouser ElectronicsUSA880RFQ7/26/2014 2:06:00 AM
MK17-B-2DIGI-KEYUSA3410RFQ7/26/2014 1:39:00 AM
MK17-B-2Master ElectronicsUSA2144RFQ7/26/2014 12:08:00 AM
MK17-B-2Farnell element14UK223RFQ7/25/2014 2:56:00 AM
MK17-B-2element14Singapore130RFQ7/25/2014 12:25:00 AM
MK17-B-3ONLINECOMPONENTS.COMUSA350RFQ7/26/2014 3:15:00 AM
MK17-B-3Mouser ElectronicsUSA1143RFQ7/26/2014 2:06:00 AM
MK17-B-3DIGI-KEYUSA3822RFQ7/26/2014 1:39:00 AM
MK17-B-3Master ElectronicsUSA350RFQ7/26/2014 12:08:00 AM
MK17-B-3TTI Inc Global HeadquartersUSA4000RFQ7/25/2014 1:31:00 AM
MK17-B-3Farnell element14UK1676RFQ7/25/2014 3:30:00 AM
MK17-B-3element14Singapore1560RFQ7/25/2014 12:44:00 AM
MK17-C-1ONLINECOMPONENTS.COMUSA2475RFQ7/26/2014 3:15:00 AM
MK17-C-1Master ElectronicsUSA2475RFQ7/26/2014 12:08:00 AM
MK17-C-2ONLINECOMPONENTS.COMUSA458RFQ7/26/2014 3:15:00 AM
MK17-C-2DIGI-KEYUSA2301RFQ7/26/2014 1:39:00 AM
MK17-C-2Master ElectronicsUSA458RFQ7/26/2014 12:08:00 AM
MK17-C-2Farnell element14UK235RFQ7/25/2014 2:56:00 AM
MK17-C-2element14Singapore156RFQ7/25/2014 12:25:00 AM
MK17-C-3TTI Inc European HeadquartersGermany2000RFQ7/26/2014 1:56:00 AM
MK17B2TTI Inc European HeadquartersGermany2000RFQ7/26/2014 1:56:00 AM


Magnetics


Reed Switch & Magnet Actuation
Click to AnimateActuator Type
PositionMovementActuation(s)Contact Form / Mode
Magnet Actuation 1

Bar Magnet

Parallel

Perpendicular

Single

Form A (Normally Open)


Magnet Actuation 2

Bar Magnet

Parallel

Parallel

Single

Form A (Normally Open)

Magnet Actuation 3

Bar Magnet

Parallel

Parallel

Multiple

Form A (Normally Open)

Magnet Actuation 4

Bar Magnet

Parallel

Parallel

Single

Form A (Normally Open)

Magnet Actuation 5

Bar Magnet

Adjacent

Rotary

Multiple

Form A (Normally Open)

Magnet Actuation 6

Ring Magnet

Adjacent

Rotary

Multiple

Form A (Normally Open)

Magnet Actuation 7

Ring Magnet

Adjacent

Rotary

Multiple

Form A (Normally Open)

Magnet Actuation 8

Bar Magnet

Above

Rotary

Multiple

Form A (Normally Open)

Magnet Actuation 9

Bar Magnet

Perpendicular

Perpendicular

Single

Form A (Normally Open)

Magnet Actuation 10

Bar Magnet

Perpendicular

Parallel

Multiple

Form A (Normally Open)

Magnet Actuation 11

Bar Magnet

Parallel

Parallel

Single

Form A (Normally Open)

Magnet Actuation 12

Bar Magnet

Parallel

Perpendicular

Single

Form B (Normally Closed)

Magnet Actuation 13

Bar Magnet

Parallel

Pivot

Single

Form A (Normally Open)

Magnet Actuation 14

Bar Magnet

Magnetic Shield

Fixed

Parallel

Single

Form A (Normally Open)

Magnet Actuation 15

Bar Magnet

Magnetic Shield

Fixed

Perpendicular

Single

Form A (Normally Open)

Magnet Actuation 16

Bar Magnet

Magnetic Shield

Fixed

Parallel

Single

Form A (Normally Open)

Associated Parts

Magnets in Housings

Pair any of these magnets in housings with the above corresponding reed sensor for a complete sensor system solution.  Other package styles may also be used, please consult the factory for more options.


Rectangular Magnets in Housings

M02 Magnet M04 Magnet M05 Magnet M12 Magnet M13 Magnet M21 Magnet

Cylindrical & Threaded Magnets in Housings

M11 Brass Magnet M11/M8 Plastic Magnet M11/M5 Stainless Magnet

PCB Through Hole Magnets in Housings

M06 Magnet

FAQ

Sensors

Are the hall, reed or emr sensors affected by EDI/RFI?

Are the hall, reed or emr sensors affected by EDI/RFI?

A hall sensor is affected by EDI and RFI and must be protected against them.  Reed sensors and emrs are not affected by EDI or RFI.

Are the hall, reed or emr sensors hermetically sealed?

Are the hall, reed or emr sensors hermetically sealed?

The reed sensor is the only sensor that is hermetically sealed.

What is the output dielectric strength for hall, reed or emr sensors?

What is the output dielectric strength for hall, reed or emr sensors?

A Hall sensors dielectric strength is less than 10 volts, for emrs its typically 250 VRMS, and reed sensors the dielectric strength can be up to 5000 volts.

What is the output capacitance for hall, reed or emr sensors?

What is the output capacitance for hall, reed or emr sensors?

The output capacitance for a Hall sensor is typically 100pf, a reed sensor is only 0.2 pico-farads, and emrs are typically 20 pico-farads.

What is the release time for hall, reed or emr sensors?

What is the release time for hall, reed or emr sensors?

The release time for a Hall sensor is typiclly 5µs, reed sensor 20µs and the emr 5 ms.

What is the operate time for hall, reed or emr sensors?

What is the operate time for hall, reed or emr sensors?

The operate time for a hall sensor is typically 5 µs, a reed sensor is 100µs and the emr is up to 10 ms.

How much current can be switched directly for hall, reed or emr sensors?

How much current can be switched directly for hall, reed or emr sensors?

Hall sensors can not switch any output current, the reed sensor and emr can typically switch up to 2 amps directly.

What is the output voltage range for hall, reed or emr sensors?

What is the output voltage range for hall, reed or emr sensors?

Hall sensors cannot switch any voltage directly.  Reed and emr sensors can switch up to 1000 volts directly.

How much power can you switch direcly with the hall, reed or emr sensors?

How much power can you switch direcly with the hall, reed or emr sensors?

Hall sensors supply a microwatt level signal, reed and emr sensors can switch up to 100 watts directly.

Can one switch loads directly for hall, reed or emr sensors?

Can one switch loads directly for hall, reed or emr sensors?

Only a reed and emr sensor can be switched directly.

What is the output on resistance for hall, reed or emr sensors?

What is the output on resistance for hall, reed or emr sensors?

Hall sensors are typically 200+ ohms, the reed and emr sensors are typically 50 milliohms.

Is hysteresis adjustable for hall, reed or emr sensors?

Is hysteresis adjustable for hall, reed or emr sensors?

Reed sensors can adjust the hysteresis from 35% to 95%.  Hall and EMR sensors have fixed hysteresis.

Is output polarity sensitivity critical for hall, reed or emr sensors?

Is output polarity sensitivity critical for hall, reed or emr sensors?

Yes output polarity is critical for proper switching operation with hall sensors only.

Are external circuits required for hall, reed or emr sensors?

Are external circuits required for hall, reed or emr sensors?

Yes - chopper circuits and drivers are required for the hall sensors only.

Is input polarity sensitivity an issue with hall, reed or emr sensors?

Is input polarity sensitivity an issue with hall, reed or emr sensors?

Only hall sensors are sensitive to input polarity.

Is an applied current required for a change of state with a hall, reed or EMR sensor?

Is an applied current required for a change of state with a hall, reed or EMR sensor?

A current is required for proper operation only on the Hall sensor.

Does a Hall Sensor require extra circuitry?

Does a Hall Sensor require extra circuitry?

Yes, they only supply a small milli-volt signal in the presence of a magnetic field. The signal needs to be amplified and then fed into a switching circuit.

What is Hall Effect?

What is Hall Effect?

A voltage is produced on a semiconductor material when in the presence of a magnetic field.  The voltage is proportional to the strength of the magnetic field.

What switch do I use when switching 5-15 Volts with 10 to 50 milliamps?

What switch do I use when switching 5-15 Volts with 10 to 50 milliamps?

Use ORD228, the ORD211 iridium, or the ORD311.

What switch do I use when switching 15-35 Volts with 10 to 250 milliamps?

What switch do I use when switching 15-35 Volts with 10 to 250 milliamps?

For a sensor use the ORD228 with iridium or the ORD2210 for a relay.

What reed switch do I use for low level switching?

What reed switch do I use for low level switching?

Small electromechanical relays are not good for switching low levels of voltages and currents.  Electromechanical relays need a hefty voltage and/or current to break any film buildup.  It is this film buildup that won't allow very low voltages and currents to pass through the contacts.   Reed switches are clearly the best.  Using sputtered ruthenium contacts or iridium contacts are the best materials for these low level loads.

When do you use an evacuated reed switch?

When do you use an evacuated reed switch?

Switching and breaking voltages of 250 volts and above is best done with a vacuum reed switch.  Up to 4000 volts can be effectively done with the ORD2210V as long as the current levels are not too high.  Above 4000 volts use the Hermetic reed switches.

How much voltage can a pressurized reed switch effectively open?

How much voltage can a pressurized reed switch effectively open?

Miniature reed switches less than 20 mm (0.80 inches) glass length can effectively break up to 250 Volts.  This depends on the pull-in AT (mT) used.  The higher the better.  Reed switches less than 10 mm will shrink this value to around 150 volts.  Minimizing the current flow at the time of opening will improve this value.

What is the signature of a load?

What is the signature of a load?

Reed switches whether they are used in sensors or relays all will be asked to switch some load.  Generally there are two aspects to this load.

  1. Its steady state load
  2. Is the actual switching taking place during the first 50 nanoseconds.  This is also called the signature of the load. 
This signature takes into consideration not only the steady state load but also any transient voltages or current that may be present during the first 50 nanoseconds.  These transients may be from stray capacitance, inductance in the line and/or common mode voltages.  From a reed switch designer standpoint, the signature is all there is.  The most important time during the switching of a load is that first 50 nanoseconds.  That is when all the damage to the contacts with occur if you are switching the contacts 'hot'.  If a customer is having a problem with early failures, this is the first place to look.  Equally important and not to be overlooked is what voltage and current is actually being broken when the contacts open.  Any healthy voltage and/or current present will chew up the contacts rapidly leading to sticking reed contacts.

How do I know what reed switch to select?

How do I know what reed switch to select?

There are several key factors:

  1. You need to have an idea of the required load.  What voltage and current is being switched at the time of closure for the first 50 nanoseconds?
  2. How many operations will be required during the life of the product?
  3. What are the size requirements?  How much room is needed?
  4. How will the product be mounted? Surface mount, thru hole, etc.
  5. For long life and low levels, use a ruthenium or an iridium sputtered/plated switch.
  6. For switching applications from 50 Volts to 200 volts use the Philips/Coto/Comus sputtered ruthenium switch.
  7. For switching currents 25 ma to 1 amp, the OKI thickly plated rhodium is good along with our KSK-1A35.
  8. For higher voltages above 200 volts  up to 4000 volts at relatively low current use the  OKI ORD2210V.
  9. For voltages above 1000 volts up to 10,000 volts with higher currents use the Hermetic vacuum switches.  This represents a start.  One could write a book on this subject.  Best to find out the exact customer load and run a life test with a few or several reed switches to make the final determination.

Can a magnet packaged with a reed switch be turned into a temperature sensor?

Can a magnet packaged with a reed switch be turned into a temperature sensor?

A magnet and reed switch can be turned into a temperature sensor by using a magnet that has a certain curie temperature for the temperature you want to sense.  When that curie temperature is reached the magnet loses its magnetic properties whereby the reed switch contacts open.  When the temperature drops below the curie temperature, the reed contacts will close.

Go to FAQs about Reed Switches

Go to FAQs about Reed Relays

Go to FAQs about Magnets & Magnetics

Go to FAQs about Level Sensors

Go to FAQs about Test & Operate Characteristics

Go to FAQs about Quality & Reliability

Can't find the answer for your question in our FAQ's? Please use our  contact form to submit a new question.