BT Series

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
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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
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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
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250
Germany # ++49-(0)7733-94870, USA # 800-870-5385
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