3500 Series/ Low Thermal EMF Reed Relays
3501 2
3502 2
3520 2,3
3540 2
3541 2
Model Number
Parameters
Test Conditions
Units
1 Form A
2 Form A
2 Form A
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
V
Individual
Differential
Differential
Individual
Differential
µ
<5 V
<5 V
<10 V
<5 V
<5 V
µ
µ
µ
µ
µ
<3 V
<3 V
<5 V
<3 V
<3 V
µ
µ
µ
µ
µ
Technical Section for Details
<1 V
<1 V
-
-
-
-
-
-
µ
µ
<0.5 V
<0.5 V
µ
µ
COIL SPECS.
Nom. Coil Voltage
Coil Resistance
Operate Voltage
Release Voltage
VDC
5
12
5
12
5
12
5
12
5
12
+/- 10%, 25° C
Must Operate by
Must Release by
350 2000
3.8 9.0
0.4 1.0
350 2000
3.8 9.0
0.4 1.0
200 850
3.8 9.0
0.4 1.0
200 1500
3.8 9.0
0.4 1.0
200 1500
3.8 9.0
0.4 1.0
Ω
VDC - Max.
VDC - Min.
CONTACT RATING
Switching Voltage
Switching Current
Carry Current
Max DC/Peak AC Resist.
Max DC/Peak AC Resist.
Max DC/Peak AC Resist.
Max DC/Peak AC Resist.
Volts
Amps
200
0.5
1.5
10
200
0.5
1.5
10
500
1.0
2.0
28
500
0.5
2.0
10
500
0.5
2.0
10
Amps
Contact Rating
Watts
Life Expectancy-Typical 1
x 106 Ops.
Signal Level 1.0V, 10mA
500
100
1000
100
100
Static Contact
Resistance (max. init.)
50mV, 10mA
0.200
0.100
0.050
0.200
0.100
Ω
Ω
Dynamic Contact
Resistance (max. init.)
0.5V, 50mA
at 100 Hz, 1.5 msec
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
x 1012
x 1012
x 1012
x 1012
x 1012
Ω
Capacitance - Typical
Across Open Contacts
Without 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.
msec.
0.75
0.1
0.75
0.1
2.0
1.0
1.0
0.2
1.0
0.2
Release Time - Typical
Zener-Diode Suppression4
Top View:
Dot stamped on top of relay refers to pin #1 location
Grid = .1"x.1" (2.54mm x 2.54mm)
Note s:
Environmenta l Ra tings
1Consult factory for life expectancy at other switching loads.
2Models 3501 and 3540, optional electrostatic shield is tied to
pin #5. Models 3502, 3520 and 3541, optional electrostatic
shield is tied to pin #13.
-
+
Storage Temp: 35°C to 100°C;
-
+
Operating Temp: 20°C to 85°C
Solder Temp: 270°C max; 10 sec. max
The operate and release voltage and the coil
resistance are specified at 25°C. These values
vary by approximately 0.4%/°C as the ambient
temperature varies.
3Model 3520 has Hg wet contacts - position sensitive, must be
mounted within 30° of vertical plane. See schematic.
4Consists of 20V Zener-diode and 1N4002 diode in series,
connected in parallel with coil
Vibration: 20 G’s to 2000 Hz; Shock: 50 G’s
COTO TECHNOLOGY R H O P O IN T C O M P O N E N T S L T D Holland Rd, Hurst Green, Oxted, Surrey, RH8 9AX,ENGLAND
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