
MK21 Series
Reed Sensors with Mounting
Holes for Screw Fastening
CONTACT DATA
MEDER electronic
All Data at 20° C
Switch Model →
Contact Form →
Switch 52
Form A
Switch 66
Form A
Contact Ratings
Conditions
Min. Typ.
Max.
Min. Typ. Max. Unit
Switching Power
Switching Voltage
Switching Current
Carry Current
Static Contact Resistance
Dynamic Contact Resistance
Insulation Resistance across
Contact
Breakdown Voltage across
Contact
Operate Time incl. Bounce
Release Time
Capacitance
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
w/ 0.5 V & 10 mA
Measured w/ 0.5 V & 50 mA ,
1.5 ms after closure
100 volts applied
Voltage applied for 60 sec. min.
Measured w/ 100 % overdrive
Measured w/ no coil suppression
at 10 kHz cross contact
10 10
600
0.2
50
70 (VA)
250
0.5
2.5
200
1.0
0.1
10 10 *
225*
0.2
10
200
0.5
1.25
150
200
0.5
0.1
W
V
A
A
mΩ
mΩ
Ω
VDC
ms
ms
pF
Contact Operation **
Must Operate Condition
Must Release Condition
Steady state field
Steady state field
10
4
30
27
10
4
60
54
AT
AT
Environmental Data
Shock Resistance
Vibration Resistance
1/2 sinus wave duration 11 ms
From 10 - 2000 Hz
50
20
50
20
g
g
Ambient Temperature
Ambient Temperature
Stock Temperature
M 10°C/ minute max. allowable
P 10°C/ minute max. allowable
10°C/ minute max. allowable
-20
-35
85
85
260
-30
-20
-40
150
85
160
o
o
o
C
C
C
Soldering Temperature
5 sec.
260
260
o
C
Please note: The indicated electrical data are maximum values and can vary downwards when using a more sensitive
switch.
* Insulation resistance of 10 12 and breakdown voltage of 480 VDC is available.
** These ranges refer to the uncut / unmodified Reed Switches described in our Reed Switch section. Consult factory if
more detail is required.
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