3500 SERIES/LOW THERMAL EMF REED RELAYS 3500 Series Low Thermal EMF Reed Relays The 3500 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 high accuracy DVM’s, Multiplexers and Digital or Analog Multipoint Recorders. If your requirements differ from the selection options, please consult Coto’s Factory to discuss a custom reed relay. 3500 Series Features u Low Thermal EMF: < 10 µV through < 0.5 µV with 50 nV stability u Patented Low Thermal Design. U.S. Patent #4,084,142 u Low power coils to ensure low thermal EMF u High Insulation Resistance - 1012Ω u Control/Signal isolation of 1500 VDC u High reliability, hermetically sealed contacts u Form A, Dry or Hg Wetted contacts. High Dielectric Strength u Epoxy coated steel shell provides magnetic shielding u RoHS compliant (except for 3520) DIMENSIONS in Inches (Millimeters) 1.20 (30.48) .500 (12.7) .500 (12.7) .485 MAX (12.32) .485 MAX (12.32) .125 (3.17) .050 (1.27) 1.00 (25.4) .026 DIA. (0.66) 13 .200 (5.08) .300 (7.62) For Model 3501 & 3540 .050 (1.27) .100 (2.54) .100 (2.54) For Model 3502, 3520 & 3541 14 2 1 Bottom View Ordering Information XXXX-XX-X1X Part Number Shielding Options2 Model Number 1=Electrostatic Shield 3501 3502 3520 3540 3541 Coil Voltage 05=5 volts Thermal EMF Rating 12=12 volts See available ratings in specification table. 1=<10µV Hg Wetted Only 9=<5µV Dry or Wetted 8=<3µV Dry Only 7=<1µV Dry Only 5=<0.5µV Dry Only 07082013 tel: (401) 943.2686 | fax: (401) 942.0920 MODEL NUMBER Parameters 35012 Test Conditions Measured after 5 minutes at nominal coil voltage Thermal EMF Options Units µV (Refer to Reed Relay Technical Section for details) 35022 35202,3 35402 35412 1 Form A 2 Form A 1 Form A 1 Form A 2 Form A Hg Wetted Individual <5µV <3µV <1µV <0.5µV Differential <5µV <3µV <1µV <0.5µV Differential <10µV <5µV - High Voltage High Voltage Individual <5µV <3µV - Differential <5µV <3µV - COIL SPECS. Nom. Coil Voltage VDC 5 12 5 12 5 12 5 12 5 12 +/- 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 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 Max DC/Peak AC Resist. Watts 10 10 28 10 10 Coil Resistance CONTACT RATINGS Contact Rating Signal Level 1.0V, 10mA x 10 Ops. 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 Life Expectancy-Typical 1 6 RELAY SPECIFICATIONS Insulation Resistance (minimum) Between all Isolated Pins at 100V, 25°C, 40% RH Ω 1012 1012 1012 1012 1012 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 0.1 msec. Top View4: Dot stamped on top of relay refers to pin #1 location Grid = .1”x.1” (2.54mm x 2.54mm) 13 0.1 5 1 1.0 13 9 5 1 13 9 5 1 0.2 13 0.2 5 1 13 9 5 1 UP Notes: 12 4 10 6 2 10 6 2 12 4 10 6 2 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 capsule: Form A, 0.04 grams. 1 Environmental Ratings: Storage Temp: -35°C to +100°C; Operating Temp: -20°C to +85°C; Solder Temp: 270°C max; 10 sec. max All electrical parameters measured at 25°C unless otherwise specified. Vibration: 20 G’s to 2000 Hz; Shock: 50 G’s 07082013 For most recent data visit www.cotorelay.com COTO TECHNOLOGY, INC.