131
MEDER electronic
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BT Series
1
Material: Cu-alloy tinned
12.7±0.1
5.08
11±0.1 max.
3.2
L = 3.2±0.3[0.126±0.012]mm
Pins: 0.65[0.026] mmø
25.4
30.48±0.1
[1.2±0.004]
[0.126]
[1.0]
[0.2]
[0.433±0.004]
[0.5±0.004]
32.4±0.01
[1.276±0.004]
10±0.01
[0.394±0.004]
12.1±0.01
[0.476±0.004]
BTS
BT
BT BTS
Low Thermal
Reed Relays
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.
DESCRIPTION
FEATURES
Very low offset voltages
Compatible with other manufactures
Two different sizes
•
•
•
Test, measurement and control technology
High precision measuring devices
Changing-over switch for measuring points
of thermotric elements and resistance ther-
mometers
Recorder inputs
Scanners
data acquisition systems
•
•
•
•
•
•
APPLICATIONS
DIMENSIONS
All dimensions in mm [inch]
LAYOUT
Pitch 2.54 m [0.096]/ Top view
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
ORDER INFORMATION
Series Nominal
Voltage
Contact
Form
Switch
model
BT 05, 12, 24 2A 66, 75
BTS 05, 2A 46, 75, 85
132
MEDER electronic
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BT Series
Low Thermal
Reed Relays
RELAY DATA
All Data at 20° C Switch Model →
Contact Form →
Switch 46
A / dry
Switch 66
A / dry
Contact Ratings Conditions Min. Typ. Max. Min. Typ. Max. Units
Switching Power Any DC combination of V & A not to
exceed their individual max.‘s. 10 10 W
Switching Voltage 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 mΩ
Dynamic Contact Resistance 200 200 mΩ
Insulation Resistance
(100 Volts applied)
Across contacts
Contact to coil
1012
1012
1010
1012 Ω
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
0.2
4.0
0.2
4.0 pF
Thermal Offset See schematic on the following page 1 1 μV
Life Expectancies
Switching 5V & 10 mA DC only & < 10 pF stray cap. 1000 1000 106
Cycles
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 10°C/ minute max. allowable -20 85 -20 85 oC
Storage Temperature 10°C/ minute max. allowable -35 100 -35 100 oC
Soldering Temperature 5 sec. dwell 260 260 oC
Wash Ability Flux Tight
133
MEDER electronic
www.meder.com
BT Series
Low Thermal
Reed Relays
RELAY DATA
All Data at 20° C Switch Model →
Contact Form →
Switch 75
A / dry
Switch 85
A / dry
Contact Ratings Conditions Min. Typ. Max. Min. Typ. Max. Units
Switching Power Any DC combination of V & A not to
exceed their individual max.‘s. 10 100 W
Switching Voltage 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 mΩ
Dynamic Contact Resistance 200 mΩ
Insulation Resistance
(100 Volts applied)
Across contacts
Contact to coil
1010
1012
1010
-Ω
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
0.4
4.0
0.4
4.0
0.5
-pF
Thermal Offset See schematic on the following page 3 1 μV
Life Expectancies
Switching 5V & 10 mA DC only & < 10 pF stray cap. 500 500 106
Cycles
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 10°C/ minute max. allowable -20 85 -20 70 oC
Storage Temperature 10°C/ minute max. allowable -35 100 -35 100 oC
Soldering Temperature 5 sec. dwell 260 260 oC
Wash Ability Flux Tight
134
MEDER electronic
www.meder.com
BT Series
V
µ
Cu-bridge
Power Supply
Cu-bridge
BTS
BT
Low Thermal
Reed Relays
Top View
COIL DATA
MEASURING SCHEMATIC
Series Contact
Form
Switch
Model
Coil
Voltage
Coil
Resistance **
Pull-In
Voltage
Drop-Out
Voltage
Nominal
Coil Power
All Data
at 20 °C *
VDC ΩVDC VDC mW
Nom. Max. Min. Typ. Max. Max. Min. Typ.
BT 2A
66
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
BTS 2A
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
* The pull-in / drop-out voltage and coil resistance will change at the rate of 0,4% per oC
** Other resistance values on request.
