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MEDER electronic

MK21 Series

Reed Sensors with Mounting

Holes for Screw Fastening

CONTACT DATA

All Data at 20° C

Switch Model →

Contact Form →

Switch 85

Form A

Switch 90

Form B/C, potted

Contact Ratings

Conditions

Min. Typ. Max. Min. Typ. Max. Unit

Switching Power

Any DC combination of V & A

not to exceed their individual

max.‘s

100

20

W

Switching Voltage

DC or peak AC

400

175

V

Switching Current

DC or peak AC

1.0

0.5

A

Carry Current

DC or peak AC

2.5

1.0

A

Static Contact Resistance

w/ 0.5 V & 10 mA

150

150

mΩ

Dynamic Contact Resistance Measured w/ 0.5 V & 50 mA ,

1.5 ms after closure

200

250

mΩ

Insulation Resistance across

Contact

100 volts applied

Ω

Breakdown Voltage across

Contact

Voltage applied for 60 sec.

min.

4000

200

VDC

Operate Time incl. Bounce

Measured w/ 100 % overdrive

1.0

0.7

ms

Release Time

Measured w/ no coil

suppression

0.1

1.5

ms

Capacitance

at 10 kHz cross contact

0.2

1.0

pF

Contact Operation **

Must Operate Condition

Steady state field

20

60

15

40

AT

Must Release Condition

Steady state field

12

54

AT

Environmental Data

Shock Resistance

1/2 sinus wave duration 11 ms

50

50

g

Vibration Resistance

From 10 - 2000 Hz

20

20

g

Ambient Temperature

M 10°C/ minute max. allowable

-20

85

-20

85

o

C

Ambient Temperature

P 10°C/ minute max. allowable

-35

85

-35

85

o

C

Stock Temperature

10°C/ minute max. allowable

260

260

o

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.

** These ranges refer to the uncut / unmodified Reed Switches described in our Reed Switch section. Consult

factory if more detail is required.