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2322 671 91...
Vishay BCcomponents
PTC Thermistors, For Temperature Protection
FEATURES
•
•
•
•
•
•
•
•
Well-defined protection temperature levels
Very fast reaction time
Accurate resistance for ease of circuit design
Excellent long term behavior
Wide range of protection temperatures
No need to reset supply after overtemperature switch
Small size and rugged
Coated leaded and naked devices available.
QUICK REFERENCE DATA
PARAMETER
Maximum resistance at 25
°
C
Minimum resistance at
(T
n
+ 15)
°
C
Maximum (DC) voltage
Temperature range
Weight:
91002 to 91014
91072 to 91087
91102 to 91114
91152 to 91164
Climatic category
≈
0.013
≈
0.003
≈
0.08
≈
0.09
25/125/56
g
g
g
g
VALUE
120
4000
30
−
20 to (T
n
+ 15)
UNIT
Ω
Ω
V
°
C
APPLICATIONS
•
•
•
•
Industrial electronics
Power supplies
Electronic data processing
Motor protection.
DESCRIPTION
These directly heated thermistors have a positive
temperature coefficient and are primarily intended for
sensing.
NOMINAL WORKING TEMPERATURES AND ORDERING INFORMATION
NOMINAL WORKING TEMPERATURE
RESISTANCE
from
−
20
°
C
to T
n
−
20
°
C
(
Ω
)
30 to 250
30 to 250
30 to 250
30 to 250
30 to 250
30 to 250
30 to 250
30 to 250
30 to 250
30 to 250
30 to 250
30 to 250
30 to 250
30 to 250
30 to 250
RESISTANCE
at T
n
−
5
°
C
(
Ω
)
50 to 570
50 to 550
50 to 550
50 to 550
50 to 550
50 to 550
50 to 550
50 to 550
50 to 550
50 to 550
50 to 550
50 to 550
50 to 550
50 to 550
50 to 550
RESISTANCE
at T
n
+
5
°
C
(k
Ω
)
0.570 to 50
1.33 to 50
1.33 to 50
1.33 to 50
1.33 to 50
1.33 to 50
1.33 to 50
1.33 to 50
1.33 to 50
1.33 to 50
1.33 to 50
1.33 to 50
1.33 to 50
1.33 to 50
1.33 to 50
TYPE/CATALOG NUMBER 2322 ... .....
NAKED CHIP
(1)
1.0
×
1.0
(mm)
671 .....
91072
91073
(2)
91074
(2)
91075
(2)
91076
91077
91078
91079
91081
91082
91083
91084
91085
91086
91087
1.7
×
1.7
(mm)
671 .....
91002
91003
91004
91005
91006
91007
−
91009
−
91012
−
91014
−
91016
91017
NORMAL
LEADS
671 .....
91102
91103
91104
91105
91106
91107
−
91109
−
91112
−
91114
−
−
−
LEADED DEVICE
LONG
LEADS
671 .....
91152
91153
91154
91155
91156
91157
−
91159
−
91162
−
91164
−
−
−
black
brown
red
orange
yellow
green
−
blue
−
violet
−
grey
−
−
−
COLOR
CODE
T
n
°
C)
(
70
80
90
100
110
120
125
130
135
140
145
150
155
160
170
Notes
1. Naked chips are packed in a hermetically-sealed alu-plastic bag.
2. Resistance at T
n
+5
°
C = 0.570 to 50 k
Ω
.
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172
For technical questions contact: nlr.europe@vishay.com
Document Number: 29074
Revision: 10-Oct-03
2322 671 91...
PTC Thermistors, For Temperature Protection
Vishay BCcomponents
ELECTRICAL CHARACTERISTICS
PARAMETER
Maximum resistance at 25
°
C
Maximum resistance at (T
n
−
5)
°
C
Minimum resistance at (T
n
+ 15)
°
C
Minimum resistance at (T
n
+ 5)
°
C
Maximum voltage
VALUES
120
Ω
see Nominal Working Temperatures and Ordering Information table
4000
Ω
see Nominal Working Temperatures and Ordering Information table
30 V (AC or DC)
DIMENSIONS
in millimeters
PACKAGING QUANTITIES AND CATALOG NUMBERS
PACKAGING
SPQ
5000
5000
500
500
PQ
20000
20000
5000
5000
CATALOG NUMBERS
2322 ... .....
671 91002 to 671 91014
671 91072 to 671 91087
671 91102 to 671 91114
671 91152 to 671 91164
COMPONENT OUTLINES
3.5 max
3.0 max
3.5 max
3.0 max
0.5 min
7.0 max
0.5 min
7.0 max
20.0
2
2.54
40.0
min
2.54
O 0.4
MGC102
O 0.4
JW128
Component outline for 91102 to 91114.
Component outline for 91152 to 91164.
91002 to 91017
91071 to 91087
1.0
0.1
0.5
0.1
0.15
1.7
0.15
0.8
0.1
0.1
1.0
JW127
MGA051
Component outline for 91071 to 91087.
Component outline for 91002 to 91017.
For clamping, reflow or hand soldering. Not intended for either wave or ultrasonic soldering and not for spot welding.
All standard solder alloys with low activated halogene-free fluxes are acceptable, for example: 62Sn/36Pb/2Ag.
Document Number: 29074
Revision: 10-Oct-03
For technical questions contact: nlr.europe@vishay.com
1.7
www.vishay.com
173
2322 671 91...
Vishay BCcomponents
PTC Thermistors, For Temperature Protection
APPLICATION SPECIFIC DATA
Negative Temperature Coefficient (NTC) thermistors are well known for temperature sensing. What is not well known, however,
is that Positive Temperature Coefficient (PTC) thermistors can be used for thermal protection. Although their operating principles
are similar, the applications are very different; whereas NTC thermistors sense and measure temperature over a defined range,
PTC thermistors switch at one particular temperature.
Just like thermostats they protect such equipment and components as motors, transformers, power transistors and thyristors
against overtemperature. A PTC thermistor is less expensive than a thermostat, and its switch temperature can be more
accurately specified. It is also smaller and easier to design-in to electronic circuitry.
So how does it work? The PTC thermistor is mounted in thermal contact with the equipment to be protected, and connected into
the bridge arm of a comparator circuit, such as shown in Fig.1. At normal temperature, the PTC thermistor resistance (R
p
) is lower
than R
s
(see Fig.2), so the comparator's output voltage V
O
will be low. If an equipment overtemperature occurs, the PTC
thermistor will quickly heat up to its trigger or nominal reference temperature T
n
, whereupon its resistance will increase to a value
much higher than R
s
, causing V
O
to switch to a high level sufficient to activate an alarm, relay or power shutdown circuit.
APPLICATION EXAMPLES
MBA921 - 2
Vo
R1
Rs
RL
VO
Rf
Rp
Rs
(R1 = R2)
Rp
Rs
(R1 = R2)
R2
θ
PTC
thermistor
Rp
MBA920
trigger
temperature
Tn
T ( C)
o
Fig.1 .Typical comparator circuit.
Fig.2 Typical switch characteristic.
A
θ
θ
θ
θ
θ
MBD129
θ
As soon as one or more of the windings becomes too hot, the
motor is switched off.
Fig.3 Temperature protection of electric motors
θ
MBD126
The PTC thermistors located above the fluid level will be
heated to a temperature greater than T
n
.
When immersed they are cooled such that their
resistance value is reduced.
Fig.4 Liquid-level indication.
www.vishay.com
174
For technical questions contact: nlr.europe@vishay.com
Document Number: 29074
Revision: 10-Oct-03
2322 671 91...
PTC Thermistors, For Temperature Protection
Vishay BCcomponents
TYPICAL RESISTANCE/TEMPERATURE
CHARACTERISTIC FOR
2322 671 91052/002/102,
91053/003/103 and 91054/004/104.
10
6
1.5 V (DC) max.
R
(Ω)
CCB897
TYPICAL RESISTANCE/TEMPERATURE
CHARACTERISTIC FOR
2322 671 91055/005/105,
91056/006/106 and 91057/007/107.
10
6
1.5 V (DC) max.
R
(Ω)
CCB898
T
n
= 100
°C
10
5
10
5
T
n
= 110
°C
T
n
= 120
°C
10
4
10
4
10
3
10
3
T
n
= 90
°C
10
2
10
2
T
n
= 80
°C
T
n
= 70
°C
10
0
50
100
150
200
T (°C)
250
10
0
50
100
150
200
T (°C)
250
TYPICAL RESISTANCE/TEMPERATURE
CHARACTERISTIC FOR
2322 671 91058,
91059/009/109 and 91061.
10
6
1.5 V (DC) max.
R
(Ω)
CCB899
TYPICAL RESISTANCE/TEMPERATURE
CHARACTERISTIC FOR
2322 671 91062/012/112,
91063 and 91064/014/114.
10
6
1.5 V (DC) max.
R
(Ω)
CCB900
10
5
10
5
10
4
10
4
10
3
10
3
10
2
T
n
= 135
°C
10
2
T
n
= 145
°C
T
n
= 150
°C
T
n
= 130
°C
T
n
= 125
°C
T
n
= 140
°C
10
0
50
100
150
200
T (°C)
250
10
0
50
100
150
200
T (°C)
250
Document Number: 29074
Revision: 10-Oct-03
For technical questions contact: nlr.europe@vishay.com
www.vishay.com
175
2322 671 91...
Vishay BCcomponents
PTC Thermistors, For Temperature Protection
TYPICAL RESISTANCE/TEMPERATURE
CHARACTERISTIC FOR
2322 671 91065,
91066 and 91067.
10
6
1.5 V (DC) max.
R
(Ω)
T
n
= 155
°C
CCB901
10
5
10
4
T
n
= 160
°C
10
3
T
n
= 170
°C
10
2
10
0
50
100
150
200
T
(°C)
250
www.vishay.com
176
For technical questions contact: nlr.europe@vishay.com
Document Number: 29074
Revision: 10-Oct-03

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