MEDER electronic
DESCRIPTION
MK24 are the smallest, magnetically operated Reed
proximity switches for SMD mounting. Due to the
offset design of the internal reed switch leads, the
sensing characteristics are non-symmetrically re-
lated to the sensor body.
•
Lead design 1:
Flat, straight leads for PCB
slot mounting.
•
Lead design 2:
Flat, bent SMD leads.
•
Lead design 3:
J-Lead.
The sensors are supplied in 16mm Tape & Reel
package according to IEC 60286-3.
MK24 Series
Micro-Miniature Reed Sensors
for SMD Mounting
FEATURES
Small dimensions: 5.0 x 2.2 x 1.7mm
Three operate sensitivities available
Tape and Reel available
Excellent for low power operations
No external power required for sensor
operation
•
UL approved
•
•
•
•
•
APPLICATIONS
•
Electronic PCB’s where all components
are surface mounted
•
Telecommunication applications
(Hook switch in mobile and hard-wired phones)
•
Switching element in microphones
•
Medical technologies
•
Rotary encoder
ORDER INFORMATION
Series
MK24 -
1 Form A
Options
1 Form B
B
2, 3
Contact Form
Magnetic
Sensitivity
x-
A, B, C
Lead
Design
y
1, 2, 3
MAGNETIC SENSITIVITY
Sensitivity
class
Pull In
AT Range
A
B
C
5 - 10
10 - 15
15- 20
Part Number Example
MK24 - B - 1
MK24 - B - 2 - OE
B
is the magnetic sensitivity
1
is the lead design
OE is Opener Form B
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285
MK24 Series
Micro-Miniature Reed Sensors
for SMD Mounting
All dimensions in mm [inch]
MK24-x-1
max. 5
[0.197]
MEDER electronic
DIMENSIONS
MK24-x-2
max. 6.9 [0.272]
max. 5 [ 0.197]
max. 1.8 [0.071]
MK24-x-3
max. 5.5 [0.217]
max. 5 [0.197]
max. 1.7 [0.067]
max. 7.7
[0.303]
0.75
±0.05
[0.03±0.002]
max. 2.2
[0.087]
0.75
±0.05
[0.03±0.002]
5.4
±0,1
[0.213±
0.004
]
max. 1.8
[0.071]
max. 2.2
[0.087]
3.64
[0.143]
0.75
±0.05
[0.03±0.002]
max. 2.2
[0.087]
RECOMANDED PAD LAYOUT
8.2
[0.323]
1.3
[0.051]
1.1
[0.043]
RECOMANDED PAD LAYOUT
7.50
[0.295]
1.3
[0.051]
1.1
[0.043]
RECOMANDED PAD LAYOUT
5.7
[0.224]
1.5
[0.059]
1.4
[0.055]
MK24-x-2-OE
N
5,0 max.
[0.197 max.]
2,2 max.
[0.087 max.]
5,5 max.
[0.217 max.]
5,0 max.
[0.197 max.]
MK24-x-3-OE
N
2,2 max.
[0.087 max.]
2,6
[0.102]
2,5
[0.098]
2,6
[0.102]
7,3 ± 0,2
[0.287 ± 0.008]
1,1
[0.043]
1,3
[0.051]
0,8 max.
[0.031 max.]
2,5
[0.098]
Pad Layout
3,4 ± 0,3
[0.134 ± 0.012]
0,8 max.
[0.031 max.]
Pad Layout
1,5
[0.059]
1,4
[0.055]
7,5
[0.295]
5,7
[0.224]
TAPE & REEL
1.75
4
2
ø
5
1.
SOLDERING INFORMATION
reflow soldering conditions according JEDEC norm J-STD-020C
40 s
260 C
183
o
C
125
o
C
16
o
ø1
.5
7.5
Ramp up:
max. 6K/s
2.1
4
120 s
120-180 s
Ramp down:
max. 8/Ks
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286
MEDER electronic
CONTACT DATA
All Data at 20° C
Contact Form
→
Sensitivity Range A
MK24 Series
Micro-Miniature Reed Sensors
for SMD Mounting
Form A
Sensitivity Range B
Sensitivity Range C
Contact Ratings
Switching Power
Switching Voltage
Switching Current
Carry Current
Static Contact Resistance
Insulation Resistance
Breakdown Voltage
Contact Operation
Pull-in MK24-x-1
Pull-in MK24-x-1
Pull-in MK24-x-2
Pull-in MK24-x-2
Pull-in MK24-x-3
Pull-in MK24-x-3
Environmental Data
Shock Resistance
Vibration Resistance
Ambient Temperature
Stock Temperature
Soldering Temperature
Conditions
Any DC combination of V & A not
to exceed their individual max.‘s
DC or peak AC
DC or peak AC
DC or peak AC
with 40% overdrive, start value
RH <45%, 100V test voltage
Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit
1
30
0.1
0.3
250
10
9
60
10
9
100
3
30
0.3
0.5
200
10
9
100
3
30
0.3
0.5
200
W
V
A
A
mΩ
Ω
VDC
according to IEC 255-5
measured by MS150
measured by KMS11
measured by MS150
measured by KMS11
measured by MS150
measured by KMS11
1.8 - 4.5
22 - 55
1.8 - 4.5
22 - 55
2.1 - 5.3
23 - 50
3.0 - 5.8
37 - 71
3.0 - 5.8
37 - 71
3.3 - 7.0
33 - 67
4.1 - 7.0
50 - 86
4.1 - 7.0
50 - 86
4.3 - 8.6
40 - 83
mT
AT
mT
AT
mT
AT
1/2 sinus wave duration 11 ms
From 10 - 2000 Hz
10°C/ minute max. allowable
10°C/ minute max. allowable
5 Sec.
-40
-50
15
10
130
130
260
-40
-50
30
20
130
130
260
-40
-50
30
20
130
130
260
g
g
o
C
C
C
o
o
Please note: The indicated electrical data are maximum values and can vary downwards when using a more sensitive switch.
www.meder.com
287
MK24 Series
Micro-Miniature Reed Sensors
for SMD Mounting
MEDER electronic
CONTACT DATA
All Data at 20° C
Contact Ratings
Switching Power
Switching Voltage
Switching Current
Static Contact Resistance
Breakdown Voltage
Contact Operation
Lead option y
Pull-in MK24-x-y-OE
Drop-out MK24-x-y-OE
Pull-in MK24-x-y-OE
Drop-out MK24-x-y-OE
Environmental Data
Shock Resistance
Vibration Resistance
Ambient Temperature
Stock Temperature
1/2 sinus wave duration 11 ms
From 10 - 2000 Hz
10°C/ minute max. allowable
10°C/ minute max. allowable
-40
-50
30
20
130
130
g
g
o
Contact Form
→
Conditions
Any DC combination of V & A not to exceed their
individual max.‘s
DC or peak AC
DC or peak AC
measured by 40% overdrive
According to IEC 255-5
100
Form B
Min. Typ. Max. Unit
1
30
0.3
200
W
V
A
mΩ
VDC
2, 3
mT
mT
15 - 30
5 - 20
AT
AT
measured by MS150
measured by MS150
measured by KMS11
measured by KMS11
C
C
o
Please note: The indicated electrical data are maximum values and can vary downwards when using a more sensitive
switch.
Examples of actuating magnets for Form B:
AlNiCo500 – Rectangular Magnet 4x1.5x0.5mm, anisotropy in length direction (L. 4mm)
AlNiCo500 – Cylindrical magnet D2x8mm; anisotropy in length direction (L. 8mm)
Other magnets are possible (Note: direct touch with high power magnet must be avoided, due to the danger of change
in sensor magnetization.)
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288
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