2900 Series/Microminiature Reed Relays
M
ICROMINIATURE
R
EED
R
ELAYS
Ideally suited to the needs of Automated Test Equipment and RF
requirements. The specification tables allow you to select the appropri-
ate relay for your particular application. Slightly larger than the 2200
Series; these relays provide maximum versatility with options such as
electrostatic and coaxial shielding. If your requirements differ, please
consult your local representative or Coto’s Factory.
2900 S
ERIES
F
EATURES
u
u
u
u
u
u
u
Very small (0.20 in
2
), high reliability reed relays.
High Insulation Resistance - 10
12
Ω
offered on some models.
High speed switching compared to electromechanical relays.
Hermetically sealed contacts for long life.
Epoxy coated steel shell provides magnetic shielding.
Optional Electrostatic Shield for reducing capacitive coupling.
Optional Coaxial Shield for 50
Ω
impedance and switching of fast
rise time digital pulses.
Dimensions in Inches (Millimeters)
Bottom
View
2
10
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2900 Series/Microminiature Reed Relays
Model Number
Par ameter s
COIL RESISTANCE
Nom. Coil Voltage
Coil Resistance
Operate Voltage
Release Voltage
CONTACT RATING
Switching Voltage
Switching Current
Carry Current
Contact Rating
Life Expectancy-Typical
1
Static Contact
Resistance (max. init.)
Dynamic Contact
Resistance (max. init.)
RELAY SPECIFICATIONS
Insulation Resistance
(minimum)
Capacitance - Typical
Across Open Contacts
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
Between Contacts
Contacts to Shield
Contacts/Shield to Coil
At Nominal Coil Voltage,
30 Hz Square Wave
Zener-Diode Suppression
4
2904
2
Test Conditions
Units
1 For m A
2911
2
1 For m C
x
2920
2,3
1 For m A
Wet
5
75
3.8
0.4
Hg
VDC
+/- 10%, 25° C
Must Operate by
Must Release by
Ω
VDC - Max.
VDC - Min.
5
370
3.8
0.4
12
1500
9.0
1.0
5
230
3.8
0.4
12
1500
9.0
1.0
12
250
9.0
1.0
Max DC/Peak AC Resist.
Max DC/Peak AC Resist.
Max DC/Peak AC Resist.
Max DC/Peak AC Resist.
Signal Level 1.0V, 10mA
50mV, 10mA
0.5V, 50mA
at 100 Hz, 1.5 msec
Volts
Amps
Amps
Watts
x 10
6
Ops.
Ω
Ω
200
0.5
1.5
10
500
0.100
0.200
150
0.25
1.0
3
100
0.150
0.200
500
1.0
2.0
50
1000
0.075
0.100
Ω
pF
pF
VDC/peak AC
VDC/peak AC
VDC/peak AC
msec.
msec.
x
10
12
1.0
0.3
350
350
1500
0.5
0.1
x
10
11
2.0
1.0
200
200
1500
1.0
2.0
x
10
10
1.4
0.2
1000
1000
1500
1.5
1.0
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
11
Consult factory for life expectancy at other switching loads.
Model 2904, 2911 and 2920, pin #7 is tied to optional electrostatic
shield, pins #6 & #7 are tied to optional coaxial shield.
3
Model 2920 has Hg wet contacts - position sensitive, must
be mounted within 30° of vertical plane. See schematic.
4
Consist of 20V Zener-Diode and 1N4002 diode in series,
connected in parallel with coil.
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