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Series Datasheet MRX Reed Relays www.standexmeder.com
MRX Series
Reed Relays
Features: Ex-Approved for Intrinsic Safety Circuits
Applications: Process Automatization in Refineries, Mining and Chemical Industry & Others
Markets: Explosive Environment & Others
Part Description: M R X 00 - 0 X00
Nominal Voltage Contact QTY Contact Form Switch Model
05, 12, 24 1, 2, 4 A, C 21, 71, 79, 90
Customer Options Switch Model
Unit
Contact Data 21 71 79 90
Rated Power (max.)
5 10 10 7 W
Any DC combination of V&A not to exceed their individual max.s
Switching Voltage (max.)
100 200 250 28 V
DC or peak AC
Switching Current (max.)
0.25 0.5 0.5 0.24 A
DC or peak AC
Carry Current (max.)
0.5 1.25 1 0.5 A
DC or peak AC
Contact Resistance (max.)
150 150 150 150 mOhm
@ 0.5V & 50mA
Breakdown Voltage (min.)
0.25 0.3 0.4 0.25 kVDC
According to EN60255-5
Operating Time (max.)
2.5 0.5 0.5 2 ms
Incl. Bounce; Measured with w/ Nominal Voltage
Release Time (max.)
2 0.1 0.2 2 ms
Measured with no Coil Excitation
Insulation Resistance (typ.)
9 10 11 9
10 10 10 10 Ohm
Rh<45%, 100V Test Voltage
Capacitance (typ.)
0.8 0.3 0.4 1.0 pF
@ 10kHz across open Switch
USA: +1.866.782.6339 salesusa@standexmeder.com
Version 01
Europe: +49.7731.8399.0 info@standexmeder.com
27.01.2015
Asia: +86.21.37820625 salesasia@standexmeder.com
Modifications in the sense of technical progress are reserved. A Global Leader in the Design, Development, and
Manufacture of Sensor and Magnetic Components
Series Datasheet MRX Reed Relays www.standexmeder.com
Coil Data
Coil Voltage Coil Resistance Pull-In Voltage Drop-Out Voltage Nominal Coil Power
Contact Switch
(nom.) (typ.) (max.) (min.) (typ.)
Form Model
Unit VDC Ohm VDC VDC mW
05 360 3.8 1.0 70
71
1A 12 305 9 2 110
79*
24 5,880 18 3.5 100
05 250 3.8 1.0 100
71
2A 12 890 9 2 260
79**
24 1,000 18 3.5 165
4A 71 24 1,780 18 3.5 320
05 360 3.8 1.0 70
21***
1C 12 305 9 2 110
90
24 5,880 18 3.5 100
The Pull-In / Drop-Out Voltage and Coil Resistance will change at rate of 0.4% per C.
*1A79 only available with Coil Voltage 12 ** 2A79 only available with Coil Voltage 24 ***1C21 only available with Coil Voltage 05 & 12
Environmental Data Unit MRX Reed Relay
Shock Resistance (max.)
50 g
1/2 sine wave duration 11ms
Vibration Resistance (max.) 20 g
Operating Temperature -20 to 85 C
Storage Temperature -40 to 105 C
Soldering Temperature (max.)
260 C
5 sec. max.
Handling & Assembly Instructions
Switching inductive and/or capacitive loads create voltage
and/or current peaks, which may damage the relay.
Protective circuits need to be used.
Life Test Data
External magnetic fields needs to be taken into
*Load increase reduces life expectancy of Reed Switches
consideration, including a too high packing density. This may
influence the relays electrical characteristics.
Mechanical shock impacts e.g. dropping the relays may cause
immediate or post-installation failure.
Wave soldering: maximum 260/5 seconds.
Reflow soldering: Recommendations given by the soldering
paste manufacturer need to be considered as well as the
temperature limits of other components/processes.
USA: +1.866.782.6339 salesusa@standexmeder.com
Version 01
Europe: +49.7731.8399.0 info@standexmeder.com
27.01.2015
Asia: +86.21.37820625 salesasia@standexmeder.com
Modifications in the sense of technical progress are reserved.