COTO TECHNOLOGY

Model Number

3501

2

3502

2

3520

2,3

3540

2

3541

2

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

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

200

1500

200

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 RATING

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

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

12

12

12

12

12

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.

0.75

0.75

2.0

1.0

1.0

Release Time - Typical

Zener-Diode Suppression

4

msec.

0.1

0.1

1.0

0.2

0.2

3500 Series/Low Thermal EMF Reed Relays

Notes:

pin #5. Models 3502, 3520 and 3541, optional electrostatic

shield is tied to pin #13.

mounted within 30° of vertical plane. See schematic.

connected in parallel with coil

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

Top View:

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

Grid = .1"x.1" (2.54mm x 2.54mm)