3600 Series/Low Thermal EMF Reed Relays
L
OW
T
HERMAL
EMF R
EED
R
ELAYS
The 3600 Series is ideally suited to the needs of Instrumentation, Data
Acquisition, and Process Control. The specification tables allow you to
select the appropriate relay for your particular application. Recommended
for use in Scanners, Multiplexers and Digital or Analog Multipoint Record-
ers. If your requirements differ from the selection options, please consult
Coto’s Factory to discuss a custom reed relay. Refer to page 41 for
Thermal EMF test methods.
3600 S
ERIES
F
EATURES
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Low Thermal EMF: < 5 µV through < 0.5
µV
with 50 nV stability.
Patented Low Thermal Design. Patent #4,084,142.
Low power coils to ensure low thermal EMF.
High Insulation Resistance - 10
12
Ω
Control/Signal isolation of 1500 VDC
High speed switching compared to electromechanical relays.
High reliability, hermetically sealed contacts.
Various Form A contacts. High Dielectric Strength.
Epoxy coated steel shell provides magnetic shielding.
Electrostatic shield for reducing capacitive coupling.
Dimensions in Inches (Millimeters)
Bottom View
COTO TECHNOLOGY
RHOPOINT COMPONENTS LTD
Email: components@rhopoint.co.uk Website: www.rhopoint.co.uk
3600 Series/Low Thermal EMF Reed Relays
Model Number
Parameters
THERMAL EMF
OPTIONS
Test Conditions
Measured after 5 minutes
at nominal coil voltage
Refer to Reed Relay
Technical Section for Details
Units
µV
3602
2 Form A
Differential
<5µV
<3µV
<1µV
<0.5µV
5
350
3.8
0.4
12
2000
9.0
1.0
x3650
4
3 Form A
Differential
<5µV
<3µV
<1µV
<0.5µV
5
350
3.8
0.4
12
2000
9.0
1.0
x3660
2
3 Form A
Differential
<5µV
<3µV
<1µV
<0.5µV
5
350
3.8
0.4
12
2000
9.0
1.0
COIL SPECS.
Nom. Coil Voltage
Coil Resistance
Operate Voltage
Release Voltage
CONTACT RATINGS
Switching Voltage
Switching Current
Carry Current
Contact Rating
Life Expectancy-Typical
Static Contact Resistance
(max. init.)
1
+/- 10%, 25° C
Must Operate by
Must Release by
VDC
Ω
VDC - Max.
VDC - Min.
Max DC/Peak AC Resist.
Max DC/Peak AC Resist.
Max DC/Peak AC Resist.
Max DC/Peak AC Resist.
Signal Level 1.0V, 1mA
50mV, 10mA
0.5V, 50mA
at 100 Hz, 1.5 msec
Volts
Amps
Amps
Watts
x 10 Ops.
Ω
Ω
6
150
0.25
1.5
5
500
0.100
0.200
150
0.25
1.5
5
500
0.100
0.200
150
0.25
1.5
5
500
0.100
0.200
Dynamic Contact Resistance
(max. init.)
RELAY SPECIFICATIONS
Insulation Resistance
(minimum)
Capacitance - Typical
Across Open Contacts
Contact to Shield
Dielectric Strength
(minimum)
Operate Time - including
bounce - Typical
Release Time - Typical
Between all Isolated Pins
at 100V, 25°C, 40% RH
Shield Floating
Shield Guarding
Contacts Open
Shield & Coil Tied Common
Between Contacts
Contacts to Shield
Contacts/Shield to Coil
At Nominal Coil Voltage,
30 Hz Square Wave
Zener-Diode Suppression
3
Ω
pF
pF
pF
pF
VDC/peak AC
VDC/peak AC
VDC/peak AC
msec.
msec.
x
10
1.2
0.2
12
x
10
1.2
0.2
12
x
10
1.2
0.2
12
2.5
2.5
250
1000
1500
0.75
0.1
2.5
2.5
250
1000
1500
0.75
0.1
2.5
2.5
250
1000
1500
0.75
0.1
Top View:
Dot stamped on top of relay refers to pin #1 location
Grid = .1"x.1" (2.54mm x 2.54mm)
Notes:
1
2
Environmental Ratings
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.
Vibration: 20 G’s to 2000 Hz; Shock: 50 G’s
Consult factory for life expectancy at other switching loads.
Model 3660: Reed switch between pins #9 & #10 is not low
thermal and is tied in common with the electrostatic shield.
3
Consists of 20V Zener-diode and 1N4002 diode in series,
connected in parallel with coil.
4
Model 3650: Reed switch between pins #7 & #8 is not low
thermal and is not tied in common with the electrostatic shield.
Pin numbers for reference only.
COTO TECHNOLOGY
RHOPOINT COMPONENTS LTD
Holland Rd, Hurst Green, Oxted, Surrey, RH8 9AX,ENGLAND
RF/Wirelessly
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