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 1V 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 V level. APPLICATIONS * Test, measurement and control technology * High precision measuring devices * Changing-over switch for measuring points of thermotric elements and resistance thermometers * Recorder inputs * Scanners * data acquisition systems FEATURES * Very low offset voltages * Compatible with other manufactures * Two different sizes DIMENSIONS 30.480.1 [1.20.004] 12.70.1 [0.50.004] 12.10.01 [0.4760.004] 100.01 [0.3940.004] 32.40.01 [1.2760.004] BTS 110.1 max. [0.4330.004] 3.2 [0.126] BT All dimensions in mm [inch] 5.08 [0.2] Pins: o 0.65[0.026] mm L = 3.20.3[0.1260.012]mm 25.4 [1.0] Material: Cu-alloy tinned LAYOUT BT Pitch 2.54 m [0.096]/ Top view BTS 1 ORDER INFORMATION Part Number Example BT05 - 2A66 BT is the size 05 is the nominal voltage 2A is the number of contact and contact form 66 is the switch model Series Nominal Voltage Contact Form Switch model BT 05, 12, 24 2A 66, 75 BTS 05, 2A 46, 75, 85 www.meder.com 131 MEDER electronic BT Series Low Thermal Reed Relays RELAY DATA All Data at 20 C Switch Model Contact Form Contact Ratings Conditions Switching Power Any DC combination of V & A not to exceed their individual max.`s. Switching Voltage Switch 46 A / dry Switch 66 A / dry Min. Typ. Max. Min. Typ. Max. Units 10 10 W DC or peak AC 200 200 V Switching Current DC or peak AC 0.5 0.5 A Carry Current DC or peak AC 1.5 1.25 A Static Contact Resistance Measured w/ 0.5 V & 50 mA 150 150 m 200 200 m Dynamic Contact Resistance Insulation Resistance (100 Volts applied) Across contacts Contact to coil 1012 1012 1010 1012 Breakdown Voltage Across contacts Coil to contact 225 1500 225 1500 VDC VDC Operate Time incl. Bounce Nominal voltage 0.7 0.5 ms Release Time Measured w/ no coil suppression 0.1 0.1 ms Capacitance Across contacts Contact to coil Thermal Offset See schematic on the following page 0.2 4.0 0.2 4.0 1 pF 1 V 1000 106 Cycles Life Expectancies Switching 5V & 10 mA DC only & < 10 pF stray cap. 1000 For other load requirements, see the life test section on P. 120. Environmental Data Shock Resistance 1/2 sine wave duration for 11 ms 50 50 g Vibration Resistance From 10 - 2000 Hz 20 20 g Ambient Temperature 10C/ minute max. allowable -20 85 -20 85 o C Storage Temperature 10C/ minute max. allowable -35 100 -35 100 o C Soldering Temperature 5 sec. dwell 260 o C 260 Wash Ability Flux Tight www.meder.com 132 BT Series MEDER electronic Low Thermal Reed Relays RELAY DATA All Data at 20 C Switch Model Contact Form Contact Ratings Conditions Switching Power Any DC combination of V & A not to exceed their individual max.`s. Switching Voltage Switch 75 A / dry Switch 85 A / dry Min. Typ. Max. Min. Typ. Max. Units 10 100 W DC or peak AC 500 1000 V Switching Current DC or peak AC 0.5 1 A Carry Current DC or peak AC 2 2.5 A Static Contact Resistance Measured w/ 0.5 V & 50 mA 200 150 m Dynamic Contact Resistance 200 m Insulation Resistance (100 Volts applied) Across contacts Contact to coil 1010 1012 1010 - Breakdown Voltage Across contacts Coil to contact 1500 1500 1500 - VDC VDC Operate Time incl. Bounce Nominal voltage 0.5 1.1 ms Release Time Measured w/ no coil suppression 0.1 0.1 ms Capacitance Across contacts Contact to coil 0.5 - pF Thermal Offset See schematic on the following page 1 V 0.4 4.0 0.4 4.0 3 Life Expectancies Switching 5V & 10 mA DC only & < 10 pF stray cap. 500 106 Cycles 500 For other load requirements, see the life test section on P. 120. Environmental Data Shock Resistance 1/2 sine wave duration for 11 ms 50 50 g Vibration Resistance From 10 - 2000 Hz 20 20 g Ambient Temperature 10C/ minute max. allowable -20 85 -20 70 o C Storage Temperature 10C/ minute max. allowable -35 100 -35 100 o C Soldering Temperature 5 sec. dwell 260 o C 260 Wash Ability Flux Tight www.meder.com 133 BT Series MEDER electronic Low Thermal Reed Relays COIL DATA Series Contact Form Switch Model All Data at 20 C * BT BTS 2A Coil Resistance ** Pull-In Voltage Drop-Out Voltage Nominal Coil Power VDC VDC VDC mW Nom. Max. Min. Typ. Max. Max. Min. Typ. 5 7.5 810 900 990 3.8 1 30 12 16 4590 5100 5610 9 2 30 24 30 18450 20500 22550 18 3.5 30 75 5 7.5 810 900 990 3.8 1 28 46 5 8 315 350 385 3.8 0.4 72 75 5 8 180 200 220 3.8 0.4 125 85 5 7.5 270 300 330 3.8 0.4 83 66 2A Coil Voltage * The pull-in / drop-out voltage and coil resistance will change at the rate of 0,4% per oC ** Other resistance values on request. MEASURING SCHEMATIC BT Top View BTS Power Supply V Cu-bridge www.meder.com 134 Cu-bridge