Notes:
1
Consult factory for life expectancy at other switching loads.
2
Models 3501 and 3540, optional electrostatic shield is tied to pin #5.
Models 3502, 3520 and 3541, optional electrostatic shield is tied to pin #13.
3
Model 3520 has Hg wetted contacts - position sensitive, must be mounted within 30° of vertical plane. See schematic. Hg content per cap-
sule: Form A, 0.04 grams.
Environmental Ratings:
Storage Temp: -35°C to
+
100°C; Operating Temp: -20°C to
+
85°C; Solder Temp: 270°C max; 10 sec. max
All electrical parameters measured at 25°C unless otherwise specied.
Vibration: 20 G’s to 2000 Hz; Shock: 50 G’s
COTO TECHNOLOGY, INC.For most recent data visit www.cotorelay.com
MODEL NUMBER
3501
2
3502
2
3520
2,3
3540
2
3541
2
Parameters Test Conditions Units
1 Form A
2 Form A 1 Form A
Hg Wetted
1 Form A
High Voltage
2 Form A
High Voltage
Thermal EMF Options
Measured after
5 minutes at nominal
coil voltage
(Refer to Reed Relay
Technical Section for details)
µV
Individual
<5µV
<3µV
<1µV
<0.5µV
Dierential
<5µV
<3µV
<1µV
<0.5µV
Dierential
<10µV
<5µV
-
-
Individual
<5µV
<3µV
-
-
Dierential
<5µV
<3µV
-
-
COIL SPECS.
Nom. Coil Voltage VDC 5 12 5 12 5 12 5 12 5 12
Coil Resistance +/- 10%, 25° C
Ω
350 2000 350 2000 200 850 250 1500 250 1500
Operate Voltage Must Operate by VDC - Max. 3.8 9.0 3.8 9.0 3.8 9.0 3.8 9.0 3.8 9.0
Release Voltage Must Release by VDC - Min. 0.4 1.0 0.4 1.0 0.4 1.0 0.4 1.0 0.4 1.0
CONTACT RATINGS
Switching Voltage Max DC/Peak AC Resist. Volts 200 200 500 500 500
Switching Current Max DC/Peak AC Resist. Amps 0.5 0.5 1.0 0.5 0.5
Carry Current Max DC/Peak AC Resist. Amps 1.5 1.5 2.0 2.0 2.0
Contact Rating Max DC/Peak AC Resist. Watts 10 10 28 10 10
Life Expectancy-Typical
1
Signal Level 1.0V, 10mA x 10
6
Ops. 500 100 1000 100 100
Static Contact
Resistance (max. init.)
50mV, 10mA
Ω
0.200 0.100 0.050 0.200 0.100
Dynamic Contact
Resistance (max. init.)
0.5V, 50mA
at 100 Hz, 1.5 msec
Ω
0.300 0.200 0.100 0.300 0.200
RELAY SPECIFICATIONS
Insulation Resistance
(minimum)
Between all Isolated Pins
at 100V, 25°C, 40% RH
Ω
10
12
10
12
10
12
10
12
10
12
Capacitance - Typical
Across Open Contacts
No Shield
Shield Guarding
pF
pF
3.0
1.9
1.7
0.2
1.7
0.2
3.0
1.9
1.7
0.2
Dielectric Strength
(minimum)
Between Contacts
Contacts to Shield
Contacts/Shield to Coil
VDC /peak AC
VDC/peak AC
VDC/peak AC
700
1000
1500
350
1000
1500
1000
1000
1500
1500
1000
1500
1500
1000
1500
Operate Time - including
bounce - Typical
At Nominal Coil Voltage,
30 Hz Square Wave
msec. 0.75 0.75 2.0 1.0 1.0
Release Time - Typical msec.
0.1 0.1 1.0 0.2 0.2
Top View
4
:
Dot stamped on top of relay refers to pin #1 location
Grid = .1”x.1” (2.54mm x 2.54mm)
2
10
07082013
