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| 3500 Series/Low Thermal EMF Reed Relays THERMAL REED RELAYS L OW 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. Refer to page 41 for Thermal EMF test methods. SERIES FEATURES 3500 SERIES FEATURES u u u u u u u u Low Thermal EMF: < 10 V through < 0.5 V with 50 nV stability. Patented Low Thermal Design. Patent #4,084,142. Low power coils to ensure low thermal EMF. High Insulation Resistance - 1012 Control/Signal isolation of 1500 VDC High reliability, hermetically sealed contacts. Form A, Dry or Hg Wet contacts. High Dielectric Strength. Epoxy coated steel shell provides magnetic shielding. (For Model #'s 3501 & 3540) (For Model #'s 3502, 3520, 3541) Bottom View 2 Dimensions in Inches (Millimeters) COTO TECHNOLOGY RHOPOINT COMPONENTS LTD, Email: components@rhopoint.co.uk Website: www.rhopoint.co.uk 3500 Series/Low Thermal EMF Reed Relays Model Number Parameters THERMAL EMF ....OPTIONS 3501 2 Test Conditions Units 1 Form A 3502 2 2 Form A 3520 2,3 2 Form A 3540 2 1 Form A High Voltage 3541 2 2 Form A High Voltage Measured after 5 minutes at nominal coil voltage Refer to Reed Relay Technical Section for Details V Individual <5V <3V <1V <0.5V 5 12 350 2000 3.8 9.0 0.4 1.0 Differential <5V <3V <1V <0.5V 5 12 350 2000 3.8 9.0 0.4 1.0 Differential <10V <5V - Individual <5V <3V - Differential <5V <3V - COIL SPECS. 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 VDC +/- 10%, 25 C Must Operate by Must Release by VDC - Max. VDC - Min. 5 200 3.8 0.4 12 850 9.0 1.0 5 12 200 1500 3.8 9.0 0.4 1.0 5 12 200 1500 3.8 9.0 0.4 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 106 Ops. 200 0.5 1.5 10 500 0.200 0.300 200 0.5 1.5 10 100 0.100 0.200 500 1.0 2.0 28 1000 0.050 0.100 500 0.5 2.0 10 100 0.200 0.300 500 0.5 2.0 10 100 0.100 0.200 Between all Isolated Pins at 100V, 25C, 40% RH Without shield Shield Guarding Between Contacts Contacts to Shield Contacts/Shield to Coil At Nominal Coil Voltage, 30 Hz Square Wave Zener-Diode Suppression4 pF pF VDC/peak AC VDC/peak AC VDC/peak AC msec. msec. x 1012 3.0 1.9 700 1000 1500 0.75 0.1 x 1012 1.7 0.2 350 1000 1500 0.75 0.1 x 1012 1.7 0.2 1000 1000 1500 2.0 1.0 x 1012 3.0 1.9 1500 1000 1500 1.0 0.2 x 1012 1.7 0.2 1500 1000 1500 1.0 0.2 Top View: Dot stamped on top of relay refers to pin #1 location Grid = .1"x.1" (2.54mm x 2.54mm) Notes: 1 Environmental Ratings Storage Temp: -35C to +100C; Operating Temp: -20C to +85C Solder Temp: 270C max; 10 sec. max The operate and release voltage and the coil resistance are specified at 25C. These values vary by approximately 0.4%/C as the ambient temperature varies. Vibration: 20 G's to 2000 Hz; Shock: 50 G's 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 wet contacts - position sensitive, must be mounted within 30 of vertical plane. See schematic. 4 Consists of 20V Zener-diode and 1N4002 diode in series, connected in parallel with coil COTO TECHNOLOGY RHOPOINT COMPONENTS LTD Holland Rd, Hurst Green, Oxted, Surrey, RH8 9AX,ENGLAND |
Price & Availability of 3520
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