BT Series MEDER electronic Low Thermal Reed Relays DESCRIPTION The BT series are low thermal relays with 2 Form A switches having a thermal offset voltage of 1µV max. with a 100% duty cycle. This extremely low thermal voltage is achieved through an optimized temperature balance between the Reed Switches and minimum coil power. This enables the relays of the BT series to switch signals in the low µV level. APPLICATIONS • Test, measurement and control technology • High precision measuring devices • Change-over switch for measuring points of thermoelectric elements and resistance thermometers • Recorder inputs • Scanners • Data Acquisition systems FEATURES • Form B available • Very low offset voltages DIMENSIONS PIN OUT All dimensions in mm [inches] AlAl ORDER INFORMATION SERIES NOMINAL VOLTAGE CONTACT FORM SWITCH MODEL BT XX - 2A 66 OPTIONS 05, 12, 24 Part Number Example BT05 - 2A66 05 is the nominal voltage www.meder.com 248 Germany # ++49-(0)7733-94870, USA # 800-870-5385 MEDER electronic BT Series Low Thermal Reed Relays RELAY DATA Switch Model --> Contact For m --> All data at 20 0C Contact Ratings Conditions Switching Power Any DC combination of V & A not to exceed their individual max.'s Switching Voltage Switch 66 2 For m A Min. Typ. Max. Units 10 W D C or peak A C 200 V Switching Current D C or peak A C 0.5 A Carry Current D C or peak A C 1.25 A w/ 0.5V & 50mA 150 mΩ 200 mΩ Static Contact Resistance Dynamic Contact Resistance Insulation Resistance (100 Volts applied) Breakdown Voltage Measured w/ 0.5V & 50mA 1.5 ms after closure Across contacts Contact to coil Across contacts Contact to coil 1 0 10 1 0 12 225 1500 1 0 12 1 0 14 Ω VD C Operate Time, incl. Bounce Measured w/ 100% overdrive 0.5 ms Release Time Measured w/ no coil suppression 0.1 ms Capacitance Across contacts Contact to coil Thermal Offset See schematic on following page 0.2 4.0 pF 1 µV Life Expectancies Switching 0.5 Volts @ 10mA DC only & <10 pF stray cap. 106 Cycles 1000 For other load requirements please see our life test section located on page 151. Environmental Data Shock Resistance 1/2 sine wave duration 11ms 50 Vibration Resistance From 10 - 2000 Hz 20 Ambient Temperature 10 C/ minute max. allowable -20 Storage Temperature 10 C/ minute max. allowable -40 Soldering Temperature 5 sec. dwell 0 0 g g 70 0 C 105 0 C 260 0 C www.meder.com Germany # ++49-(0)7733-94870, USA # 800-870-5385 249 BT Series MEDER electronic Low Thermal Reed Relays COIL DATA CONTACT FOR M SWITCH MODEL All data at 20 0C * 2A 66 COIL VOLTAGE COIL RESISTANCE PULL-IN VOLTAGE DROP-OUT VOLTAGE NOMINAL COIL POWER VD C Ω VD C VD C mW Nom. Max. Min. Typ. Max. Min. Max. Min. Max. Typ. 5 7.5 810 900 990 0.85 3.5 0.75 3.4 30 12 16 4590 5100 5610 1.9 8.4 1.8 8.3 30 24 30 18450 20500 22550 3.7 16.8 3.6 16.7 30 * The pull-in / drop-out voltage and coil resistance will change at the rate of 0.4 % per 0C. MEASURING SCHEMATIC View on component side www.meder.com 250 Germany # ++49-(0)7733-94870, USA # 800-870-5385