A Global Leader in the Design, Development, and
Manufacture of Sensor and Magnetic Components
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 X 00
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.)
Any
DC combination of V&A not to exceed their individual max.’s 5 10 10 7 W
Switching Voltage
(max.)
DC or
peak AC 100 200 250 28 V
Switching Current
(max.)
DC
or peak AC 0.25 0.5 0.5 0.24 A
Carry Current
(max.)
DC
or peak AC 0.5 1.25 1 0.5 A
Contact Resistance
(max.)
@
0.5V & 50mA 150 150 150 150 mOhm
Breakdown
Voltage (min.)
According
to EN60255-5 0.25 0.3 0.4 0.25 kVDC
Operating
Time (max.)
Incl. Bounce; Measured with w/ Nominal Voltage
2.5 0.5 0.5 2 ms
Release Time (max.)
Measured
with no Coil Excitation 2 0.1 0.2 2 ms
Insulation
Resistance (typ.)
Rh<45
%, 100V Test Voltage 109 1010 1011 109 Ohm
Capacitance
(typ.)
@
10kHz across open Switch 0.8 0.3 0.4 1.0 pF
Modifications in the sense of technical progress are reserved.
Version 01
27.01.2015
USA: +1.866.782.6339 salesusa@standexmeder.com
Europe: +49.7731.8399.0 │ info@standexmeder.com
Asia: +86.21.37820625 │ salesasia@standexmeder.com
A Global Leader in the Design, Development, and
Manufacture of Sensor and Magnetic Components
Series Datasheet MRX Reed Relays www.standexmeder.com
MRX Reed Relay
Environmental
Data Unit
Shock Resistance (max.)
1/2 sine wave duration 11ms
50 g
Vibration
Resistance (max.) 20 g
Operating Temperature
-20 to 85 °C
Storage Temperature
-40 to 105 °C
Soldering
Temperature (max.)
5 sec. max.
260 °C
Life Test Data
*Load increase reduces life
expectancy of Reed Switches
Coil Data Coil Voltage
(nom.)
Coil Resistance
(typ.)
Pull-In Voltage
(max.)
Drop-Out Voltage
(min.)
Nominal Coil Power
(typ.)
Contact
Form
Model
Unit VDC Ohm VDC VDC mW
1A 71
79*
05 360 3.8 1.0 70
12 305 9 2 110
24 5,880 18 3.5 100
2A 71
79**
05 250 3.8 1.0 100
12 890 9 2 260
24 1,000 18 3.5 165
4A 71 24 1,780 18 3.5 320
1C
90
05 360 3.8 1.0 70
12 305 9 2 110
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
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.
External magnetic fields needs to be taken into
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.
Modifications in the sense of technical progress are reserved.
Version 01
27.01.2015
USA: +1.866.782.6339 salesusa@standexmeder.com
Europe: +49.7731.8399.0 │ info@standexmeder.com
Asia: +86.21.37820625 │ salesasia@standexmeder.com
A Global Leader in the Design, Development, and
Manufacture of Sensor and Magnetic Components
Series Datasheet MRX Reed Relays www.standexmeder.com
Pin Out
Top View
Modifications in the sense of technical progress are reserved.
Version 01
27.01.2015
USA: +1.866.782.6339 salesusa@standexmeder.com
Europe: +49.7731.8399.0 │ info@standexmeder.com
Asia: +86.21.37820625 │ salesasia@standexmeder.com
Glossary
Contact Form
Form
A
NO = Normally Open Contacts
SPST = Single Pole Single
Throw
Form B
NC = Normally Closed
Contacts
SPST
= Single Pole Single Throw
Form C
Changeover
SPDT = Single Pole Double
Throw