CT10 Series Datasheet by Coto Technology

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COTO CLASSIC™ CT10 SERIES MOLDED REED SWITCH
1 Description
The CT10 is an overmolded dry reed switch. It is single-pole, single
throw (SPST) type, having normally open ruthenium contacts.
The sensor is a double-ended type and may be actuated with an
electromagnet, a permanent magnet or a combination of both.
The device is designed for SMD mounting and is available in three
lead configurations.
* NEW CT10-G2 now 260 ºC process temperature hardy
2 Features
u Ideal for SMD pick and place
u Tape and reel packaging
u 10W rating
u Rugged encapsulation
u Excellent life and reliability
u RoHS compliant
3 Applications
u Proximity Sensing
u Security Alarm Sensor
u Level Sensor
u Flow Sensor
u Pulse Counter
Device Packages
Device Information
Part Series Package Body Size (mm)
CT10 Molded
SMD
15.72 x 2.41 x 2.4 (A2)
16.38 x 2.92 x 2.41 (G1)
19.68 x 2.92 x 2.41 (G2)
19.7 x 2.92 x 2.41 (G4)
4 Dimensions Inches (Millimeters)
4.1 CT10-XXXX-G1 4.2 CT10-XXXX-G2
4.3 CT10-XXXX-G4 4.4 CT10-XXXX-A2
.458 (11.6) Max.
.765-.775 (19.43-19.68)
.040 (1.02) Max.
.035-.045 (.89-1.14)
.115 (2.92) Max.
.025 (.63)
.030 (.76) Max.
.095 (2.41) Max.
(SIDE VIEW)
(BOTTOM VIEW)
.505 (12.8)
.765-.775 (19.4-19.6)
.250 (6.3)
Ø.040 (1.02)
0.095 (2.4
)
.095 (2.41) Max.
.045 (1.14)
.045 (1.14)
.010 (0.25) .015 (0.38)
.045 (1.1) intersec
tion
.035 (0.9
)
.005±.005 (0.127±0.127)
Below Standoff Surface
.045 (1.14) Max.
(SIDE VIEW)
.458 (11.63) Max.
.635-.645 (16.13-16.38)
.040 (1.02) Max.
0.001(0.03) Max.
STRESS RELIEF MAR
K
.0264 (.64) Max.
.115 (2.92) Max.
.035-.045 (.89-1.14)
.00
8-.012 (.20-.30)
.030 (.76) Max.
.095 (2.41) Max.
(SIDE VIEW)
(BOTTOM VIEW)
.609-.619 (15.47-15.72)
.095 (2.41
)
.505 (12.8)
.057 (1.45
)
.095 (2.4)
.040 (1.01)
(SIDE VIEW)
(BOTTOM VIEW)
01'0— (lASSIt‘
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COTO CLASSIC™ CT10 SERIES MOLDED REED SWITCH
5 Specifications for CT10
5.1 Operating Characteristics for CT10-XXXX-YY
Parameters Units Min Typ Max
Operating Range AT 10 40
Release Range AT 335
5.2 Environmental Characteristics for CT10-XXXX-YY
Parameters Units Min Typ Max
Switched Power W 10
Switched Voltage DC V 200
Switched Voltage AC, RMS value V 140
Switched Current DC mA 500
Switched Current AC, RMS value mA 500
Carry Current DC A 0.5
Breakdown Voltage V230
Contact Resistance mΩ200
Insulation Resistance MΩ106
5.3 Environmental Ratings for CT10-XXXX-YY
Parameters Units Min Type Max
Storage Temperature ºC -40 125
Operating Temperature ºC -40 125
Vibration Resistance G10
Shock Resistance G 100
Notes:
1. AT values measured using a Philips 10JK coil.
2. Surface mount component processing temperature Model G1 & G2: 500°F(260°C) max for 1 minute dwell time; Model G4 & A2: 439°F(226°C) max
for 1 minute dwell time.
3. Temperature measured on leads where lead exits molded package.
sssssss Illetw] __* y rm" w :9 E E T t a L 1 L \Hl-
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COTO CLASSIC™ CT10 SERIES MOLDED REED SWITCH
[]
Direction of Feed
Ø.079
.06295 [16]
.665 [16.89]
.130 [3.3].105 [2.677]
.315 [8.0] Pitch
.365
[9.275]
1.259
[32]
.157
[4]
.078
[2]
.100 [2.54]
1.5.059 +.004
–.000
B
Notes:
1. All tape and sprocket hole dimensions are per EIA-481 unless noted.
2. All pocket dimensions are ± .005”.
Notes:
1. All tape and sprocket hole dimensions
are per EIA-481 unless noted.
2. All pocket dimensions are ± 0.010.
.3
40
.314
[8]
.095
.123
0.59 +.004
–.000
Ø.079
0.799
[20.3]
1.26
[32] .340 .779
6.1 CT10-XXXX-G1 and CT10-XXXX-A2 Carrier Tape
6.2 CT10-XXXX-G2 and CT10-XXXX-G4 Carrier Tape
6 CT10 Reel & Carrier Tape Packaging
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COTO CLASSIC™ CT10 SERIES MOLDED REED SWITCH
.646 +.012
–.008
0.512
[13]
4.0”
.752*
[19.1]
13.0” Ref.
[330]
Notes:
* Measured at Hub
Advantek #RD33016 SW Antistatic
16.4+.3*
–.2
[]
6.3 CT10 Reel Packaging
6 CT10 Reel & Carrier Tape Packaging
7 Recommended Reflow Profile SAC Alloy
Pre-heating
zone
<2.5∞C/sec Pre-flow zone
Reflow zone
Time above
217∞C
(60 - 90 sec)
Peak Temperature
235-260∞C
(20 sec max)
Cooling zone
Time (sec)
Temperature (C)
Ambient
300
250
200
150
100
50
030 60 90 120 150 180 210 240 270 3000
CT10 Packaging
Box Dimensions - 14x14x6 inches
Fits 1 to 3 reels = 2000 to 6000 pcs
Weight for 2000 pcs: 1.20 kilos
Weight for 6000 pcs: 2.90 kilos
E'D'I'OE‘ mssm (Tl O-XXXX-YY
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COTO CLASSIC™ CT10 SERIES MOLDED REED SWITCH
9 Ordering Information
A complete part number is represented by the digits to the right of the CT10 series prefix followed by a suffix as shown below.
EXAMPLE: CT10-1030-G1 is a CT10 sensor (10mm encapsulated switch) with a sensitivity range from 10 to 30AT lead ends are formed according
to the G1 version
8 Recommended Pay Layouts for SMD Reed Switches
CT10-XXXX-YY
Series
CT1
0
Lead Configuration Subset:
G1 for Gull Wing Version 1 (16.4mm)
G2/G4
for Gull Wing Version 2 (19.6mm)
A2 for Axial
AT Range (measured after mold & lead form)
10-30; 10-40
FIGURE 1
A
B
C
D
Model Lead Type Fig. # Dim. A Dim. B Dim. C Dim. D
CT05 G1 1 .424/10.76 .242/6.14 .091/2.31 .057/1.45
CT05 “J1” 1.330/8.38 .168/4.27 .081/2.06 .057/1.45
CT10 A2 1.666/16.92 .529/13.44 .069/1.74 .050/1.27
CT10 G1 1.692/17. 57 .520/13.20 .086/2.18 .041/1.04
CT10 G2 1 .822/20.87 .640/16.25 .091/2.31 .057/1.45
CT10 G4 1 .822/20.87 .640/16.25 .091/2.31 .057/1.45
(Dimensions in Inches/Millimeters)
_ 01'0— ELASSIE‘
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COTO CLASSIC™ CT10 SERIES MOLDED REED SWITCH
Dry-Reed Switch: A dry-reed switch is an assembly containing fer-
romagnetic contact blades, hermetically sealed in a glass envelope and
operated by an externally-generated magnetic field, e.g., that from an
actuating coil.
Operate Value: The ampere turn value at which normally-open
contacts close. Lower value reflects higher sensitivity.
Operate Time: The operate time is the time between the instant
of application of a magnetic field to a dry-reed switch and the instant
of the first physical closing of this switch. The operate time does not
include bounce time.
Release Value: The ampere turn value at which normally-open
contacts, held closed by a magnetic field, will reopen as field strength
is reduced.
Release Time: The release time is the time between the instant of re-
moval of an applied magnetic field to a dry-reed switch and the instant
of the first physical opening of this switch. The release time does not
include bounce time.
Bounce: Bounce is a momentary opening of a switch after initial clos-
ing, or a momentary closing after initial opening.
Bounce Time: The bounce time is the interval of time between the
instant of initial closing (or opening) and the instant of final closing (or
opening) of the dry-reed switch.
Dry-Reed Switch Contact Resistance: The dry-reed switch con-
tact resistance is the resistance of the dry-reed switch under specified
conditions of measurement.
Saturate Value: The saturate value is defined as the value of the
applied magnetic field at which the dry-reed switch is unaffected by
further increase of the applied magnetic field.
10 Glossary of Terms
E'D‘I’DE« mssm
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COTO CLASSIC™ CT10 SERIES MOLDED REED SWITCH
Operate and Release Values
Operate and release values are dependent on the measuring coil, the
rate of energization (0.1 AT/ms), the detection of the operate (closing)
and the release (opening) moment, the position of the measuring coil
relative to the earth’s magnetic field and on the environmental condi-
tions.
Operate and Release Times
The operate and release times are dependent mostly on the energiza-
tion and de-energization rate. They are proportional to the R/L time of
the coil. Operate time is inversely proportional to the ratio of ener-
gization to operate value. Release time is proportional to the ratio of
energization to release value.
Bounce Time
The bounce time is almost independent of the energization, how-
ever, a high energization gives a somewhat shorter bounce time. The
bounce time is dependent on the current to be switched; above ap-
proximately 100 mA the bounce time is almost zero.
Contact Resistance
The contact resistance is dependent on the wire composition, wire
diameter, energization and contact layer. The published contact
resistance is measured with an open contact voltage of 20 mV and
a current through the closed contacts of 10 mA, using the 4-point
method (Kelvin method). Distance between measuring points for all
switch types is 41 mm.
Breakdown Voltage
The breakdown voltage depends on the gap between the contact
blades, kind of gas filling, gas pressure, material of the contact layer
and the availability of free electrons in the gas. The first three items
are set by the design of a particular reed switch. The last item is very
dependent on ambient conditions. Therefore minimum values are
given in the published data.
Insulation Resistance
The insulation resistance is dependent on the condition of the inside
of the glass envelope and on the environment, e.g. relative humidity,
conducting layers on the outside of the glass envelope.
Life Expectancy
The life of a dry-reed switch is influenced by the contact layer, the
mechanical characteristics of the reed switch blade, the load, the load
circuit parameters and the applied magnetic field. The contact layer
and the blade characteristics are determined by the manufacturer.
Load, load circuit parameters and magnetic field are determined by
the user. The load should be within the maximum published values.
The load circuit parameters (wiring capacitance and inductance),
should be kept as low as possible and the applied magnetic field must
be stronger than necessary for obtaining the maximum operate value.
Remark: Due to the influence of the load circuit on contact resis-
tance and sticking, and also the influence of the applied magnetic
field and used coil or magnet, life-test information can only be
compared when it is the result of testing under exactly the same
conditions (test equipment).
Coils:
The electrical characteristics are measured using either the NARM1
coil or the 10JK coil. Using another coil may change these characteris-
tics. The measuring method e.g. speed, detection and the position of
the coil with respect to the earth’s magnetic field may also affect the
characteristics. The definitions of the NARM1 coil and the 10JK coil are
as follows:
10JK Coil: 10000 turns of 47 SWG single enameled copper wire on
an elliptical coil former of 12.5 mm winding length.
NARM 1 Coil: 5000 turns of 46 AWG single enameled copper wire
on an elliptical coil former of 10.4 mm winding length.
11 Reed Switch Characteristics
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COTO CLASSIC™ CT10 SERIES MOLDED REED SWITCH
Operation Using a Coil
Figures 12.1, 12.2 and 12.3 illustrate the various methods of operating the switch using a coil.
With the method given in Fig. 12.3, the dry-reed switch and/or permanent magnet can be placed either within or outside the coil.
12 Reed Switch Operation Methods
12.2: A dry-reed switch mounted outside a coil
NS
lc
12.3: A dry-reed switch biased by a permanent magnet and operated by a coil
12.1: A dry-reed switch mounted within a coil
NS
lc
sssssss
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COTO CLASSIC™ CT10 SERIES MOLDED REED SWITCH
13 Operation Using a Permanent Magnet
Permanent magnets are also often used to operate dry-reed switches. Figures 13.1, 13.2, 13.3 and 13.4 illustrate the various methods available.
13.2: Movement, with the magnetic field
perpendicular to the dry-reed switch
N
S
X
-Y +Y
OFF OFF
HOLD HOLD
-Y (mm) +Y (mm)
ON
OFF
13.4: Rotational movement with two or more pole
ring magnets
N
N
S
N
N
S
S
SON
OFF
NS
N
S
N
S
N
S
13.1: Movement, with the magnetic field parallel
to the dry-reed switch
NS
X
-Y +Y
OFF OFF
HOLD
-Y (mm) +Y (mm)
ON
13.3: Rotational movement with a bar shaped
permanent magnet
NS
OFF OFF
HOLD HOLD
ON
0180º
90º
º
E'D‘I’DE« mssm
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COTO CLASSIC™ CT10 SERIES MOLDED REED SWITCH
14 Shielding
Ferromagnetic materials which shunt the magnetic fields may be used to shield a dry-reed switch (see Fig. 14.1).
15 Magnetic Application
There are many applications for dry-reed switches used in combination with a permanent magnet. Figure 15.1 shows the relationship between
the Gauss values of a permanent magnet and the AT values of Coto dry-reed switches in the Philips Standard Coil. It enables the customer to
determine which reed switch AT range can be used in combination with a specific permanent magnet. Please note that this relationship is an
approximation specifically for Coto dry-reed switches only.
14.1: Shielding a magnetically operated switch
NS
ON
SHIELD
OFF
Fig. 15.1: Relationship between the field strength of a
permanent magnet and the ampere-turn
values of Coto reed switches in the Philips
Standard Coil
1000 706010 20 30 40 50 9080
Philips Standard Coil (AT)
Permanent
Magnet
Field Strength
(Gauss)
250
200
225
150
175
100
125
50
75
25
0
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COTO CLASSIC™ CT10 SERIES MOLDED REED SWITCH
16 Switching Considerations: Application Information
Should your application require further information, please consult your nearest Coto Technology sales office.
17 Switching Considerations: Contact Protection
Unless stated otherwise, the published life-expectancy data is based on resistive loads. For inductive, capacitive or lamp loads, inrush current or
reverse voltage can affect the life of a reed switch. For a maximum life-time, contact protection is advised.
17.1 Inductive Loads
To reduce the high reverse voltage produced when a reed switch opens, the following contact protection can be applied:
DC voltage: a diode parallel to the load or the reed switch (see Fig. 17.1.1).
AC voltage: An RC-network parallel to the load or the reed switch (see Fig. 17.1.2).
17.2 Capacitive Loads
To reduce the high inrush current when a reed switch closes, a resistor must be connected in series with the capacitance or the reed
switch.
When wiring a load and reed switch over a long distance, electrostatic capacitance, arising from the cable, can damage the reed
switch. To protect against this capacitance a series surge protector (L) or a resistor should be connected in series.
17.3 Lamp Loads
To reduce the high inrush current when a cold incandescent lamp has to be switched by a reed switch (closing only), a resistor must be
connected in series with the lamp or parallel to the reed switch.
and
where: C in μF; I in A; R in Ω; U in V.
C = 10
I2
R =
U
10 1 +
(50
U)
Fig. 17.1.1: DC voltage contact protection
+_
Fig. 17.1.2: AC voltage contact protection
~
R
C

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