Contact Information:
Standex-Meder Electronics
World Headquarters
4538 Camberwell Road
Cincinnati, OH 45209 USA
Standex Americas (OH)
+1.866.STANDEX
(+1.866.782.6339)
info@standexelectronics.com
Meder Americas (MA)
+1.800.870.5385
salesusa@standexmeder.com
Standex-Meder Asia (Shanghai)
+86.21.37820625
salesasia@standexmeder.com
Standex-Meder Europe (Germany)
+49.7731.8399.0
electronics@standexchina.com
GR501 Reed Switch
www.standexmeder.com
Professional grade sub miniature reed switch with rhodium contacts
Designed for applications where the available magnetic field is very low
Useful for "wide-gap" security system applications and other magnetic systems requiring
long operating distances with permanent magnets
Physical Characteristics
A Glass Length (Max.) 12.7 mm
B Overall Length (Max.) 54.0 mm
C Glass Diameter (Max.) 2.3 mm
D Lead Diameter (Nom.) 0.45 mm
Electrical Characteristics
Contact Arrangement Form A (SPST), Center Gap
Contact Material Rhodium
Power Rating
1
10VA maximum
Switching Current (Max.) 0.5 Amp. DC, 0.5 Amp. AC
Carry Current (Max.) 0.75 Amp. DC, 0.75 Amp. AC
Switching Voltage (Max.) 100 VDC, 125 VAC
Breakdown Voltage (Min. @20AT)
2
200 Volts DC
Contact Resistance
3
150 Milliohms
Insulation Resistance (Min.) 10
12
ohms
Contact Capacitance (pf Max.) 0.3 pf
1.
The specification for VA rating may sometimes be exceeded f
or less sensitive (higher AT) switches, and should be
decreased for very sensitive (lower AT) switches. Standex-Meder Electronics will run life tests specific to a customer’s
load upon request.
2. Breakdown voltage is measured in the presence of a radioactive ionising source. Switch leakage current is limited to
100 microamperes
3. Contact resistance measurements are made at 10ma from a 1-volt source, with 50% overdrive, using a 4-wire (Kelvin)
measuring system. Contact probes are located on 43 mm centres.
Minimum Switching Life with Standard Test Loads, using 20AT switch
Voltage 5 VDC 10 VDC 12 VDC 24 VDC 100 VDC 125 VAC
Current 2 mA 1 A 10 mA 10 mA 100 mA 80 mA
Life 100 x 10
6
0.5 x 10
6
10 x 10
6
2 x 10
6
0.5 x 10
6
0.5 x 10
6
Note:
End of life is defined as con
tact resistance exceeding one ohm and/or failure to operate.
A Glo
bal Leader in the Design, Development, and
Manufacture of Sensors and Magnetic Components
Product Solutions
www.standexmeder.com
REACH & RoHS Compliant
A Global Leader in the Design, Development, and
Manufacture of Sensors and Magnetic Components
GR501 Reed Switch
www.standexmeder.com
Operating Characteristics
Magnetic Sensitivity (Range - Pull In) 7 to 30 Ampere Turns
Magnetic Sensitivity (Range - Drop Out) (See chart below)
Operate Time, including bounce (typ.) 1.0 Milliseconds
Release Time (typ.) 0.1 Milliseconds
Resonant Frequency (typ.) 3.2 kHz
Vibration, 10-2,000 Hz (G's Max.) 50 G
Shock, 11-ms. 1/2 Sine wave (G's Max.) 100 G
Operating Temperature -40°C to + 125°C
Storage Temperature -50°C to + 155°C
Charts
Breakdown Voltage Plotted
Against Pull-In Ampere Turns
Pull-In Ampere Turns Plotted
Against Drop-Out Ampere Turns
Change In Pull-In Ampere Turns
After Switch Lead Cutting
Change In Drop-Out Ampere Turns
After Switch Lead Cutting
