3500 SERIES/LOW THERMAL EMF REED RELAYS 3500 Series Low Thermal EMF Reed Relays e 3Th 500 Series is ideally suited to the needs of Instrumentation, Data Acquisition and Process Control Th . e specicfi ation tables allow you to select the appropriate relay for your particular application R . ecommended for use in high accuracy DVMs, Multi - plexers and Digital or Analog Multipoint Recorders . If your requirements differ from the selection options, please consult Cotos Factory to discuss a custom reed relay . 3500 Series Features u Low Thermal EMF: < 10 V through < 0 . 5 V with 50 nV stability u Patented Low Thermal Design U S P . atent 4,084,142 u Low power coils to ensure low thermal EMF 12 u High Insulation Resistance - 10 u Control/Signal isolation of 1500 VDC u High reliability, hermetically sealed contacts u Form A, Dry or Hg Wetted contacts H . igh Dielectric Strength u Epoxy coated steel shell provides magnetic shielding u RoHS compliant (except for 3520) DIMENSIONS in Inches (Millimeters) 1.20 .500 .500 (30.48) (12.7) (12.7) .485 MAX .485 MAX (12.32) (12.32) .050 .050 .100 (1.27) 1.00 (1.27) .200 (2.54) (25.4) .125 .100 (5.08) (3.17) (2.54) .300 (7.62) .026 DIA. (0.66) For Model For Model 3501 & 3540 3502, 3520 & 3541 13 14 2 1 Bottom View Ordering Information XXXX--XX X1X Part Number 2 Model Number Shielding Options 1=Electrostatic Shield 3501 3502 3520 3540 3541 Coil Voltage 05=5 volts Thermal EMF Rating 12=12 volts See available ratings in specication table. 1=<10V Hg Wetted Only 9=<5V Dry or Wetted 8=<3V Dry Only 7=<1V Dry Only 5=<0.5V Dry Only tel: (401) 943.2686 fax: (401) 942.0920 20 page2 2 2,3 2 2 3501 3502 3520 3540 3541 MODEL NUMBER Parameters Test Conditions Units 1 Form A 2 Form A 1 Form A 1 Form A 2 Form A Hg Wetted High Voltage High Voltage Individual Differential Differential Individual Differential Measured after <5V <5V <10V <5V <5V 5 minutes at nominal Thermal EMF Options V <3V <3V <5V <3V <3V coil voltage (Refer to Reed Relay <1V <1V - - - Technical Section for details) <0.5V <0.5V - - - COIL SPECS. Nom. Coil Voltage VDC 5 12 5 12 5 12 5 12 5 12 Coil Resistance +/- 10%, 25 C 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 1 6 Life Expectancy-Typical Signal Level 1.0V, 10mA x 10 Ops. 500 100 1000 100 100 Static Contact 50mV, 10mA 0.200 0.100 0.050 0.200 0.100 Resistance (max. init.) Dynamic Contact 0.5V, 50mA 0.300 0.200 0.100 0.300 0.200 Resistance (max. init.) at 100 Hz, 1.5 msec RELAY SPECIFICATIONS Insulation Resistance Between all Isolated Pins 12 12 12 12 12 10 10 10 10 10 (minimum) at 100V, 25C, 40% RH Capacitance - Typical No Shield pF 3.0 1.7 1.7 3.0 1.7 Across Open Contacts Shield Guarding pF 1.9 0.2 0.2 1.9 0.2 Between Contacts V D C /p eak AC 700 350 1000 1500 1500 Dielectric Strength Contacts to Shield VDC/peak AC 1000 1000 1000 1000 1000 (minimum) Contacts/Shield to Coil VDC/peak AC 1500 1500 1500 1500 1500 Operate Time - including At Nominal Coil Voltage, msec. 0.75 0.75 2.0 1.0 1.0 bounce - Typical 30 Hz Square Wave Release Time - Typical msec. 0.1 0.1 1.0 0.2 0.2 13 5 1 13 9 5 1 13 9 5 1 13 5 1 13 9 5 1 4 Top View : Dot stamped on top of relay refers to pin 1 location Grid = .1x.1 (2.54mm x 2.54mm) UP Notes: 10 6 2 12 4 10 6 2 10 6 2 12 4 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: + + Storage Temp: -35C to 100C Operating Temp: -20C to 85C Solder Temp: 270C max 10 sec . max All electrical parameters measured at 25C unless otherwise specified . Vibration: 20 Gs to 2000 Hz Shock: 50 Gs COTO TECHNOLOGY, INC. For most recent data visit www.cotorelay.com page 21