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:

All electrical parameters measured at 25°C unless otherwise specified .

Vibration: 20 G’s to 2000 Hz; Shock: 50 G’s

MODEL NUMBER

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

Differential

<5µV

<3µV

<1µV

<0.5µV

Differential

<10µV

<5µV

-

-

Individual

<5µV

<3µV

-

-

Differential

<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

Signal Level 1.0V, 10mA

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

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

Dot stamped on top of relay refers to pin #1 location

Grid = .1”x.1” (2.54mm x 2.54mm)

1

13

5

9

2

6

10

UP

1

13

4

12

5

1

13

4

12

5

1

13

5

9

2

6

10

1

13

5

9

2

6

10

COTO TECHNOLOGY, INC.

For most recent data visit www.cotorelay.com

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