PTC thermistors as
limit temperature sensors
Motor protection, triple sensors
Series/Type:
Date:
B59300
February 2012
© EPCOS AG 2012. Reproduction, publication and dissemination of this publication, enclosures hereto and the
information contained therein without EPCOS' prior express consent is prohibited.
Sensors
Motor protection, triple sensors
Applications
Thermal protection of winding in electric
motors
Limit temperature monitoring
Features
Thermistor pellets with insulating
encapsulation in series connection
(triple sensor)
Low-resistance type, steep R/T curve
Silver-plated and PTFE-insulated AWG 26
litz wires
Characteristics for sensing temperatures
T
sense
= 90 up to 160
°C
conform with DIN 44082
Color coding of litz wires to DIN 44082,
connecting wires in yellow
UL approval to UL 1434 (file number
E69802)
RoHS-compatible
Delivery mode
Bulk
General technical data
Max. operating voltage
Max. measuring voltage
Rated resistance
Insulating test voltage
Thermal threshold time
Operating temperature range
Operating temperature range
(T
A
= 0 ... 40
°C)
(T
A
= 25
°C
... T
sense
+23 K)
(V
PTC
≤
2.5 V)
V
max
V
meas,max
R
R
V
ins
t
a
T
op
T
op
30
7.5
≤
300
2.5
<3
25/ T
sense
+23
0/+40
V DC
V DC
Ω
kV AC
s
°C
°C
Dimensional drawing
M1300
Dimensions in mm
(V
≤
V
meas,max
)
(V = V
max
)
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 2 of 11
Sensors
Motor protection, triple sensors
Electrical specifications and ordering codes
T
sense
R
(T
sense
∆T)
(V
PTC
≤
2.5 V)
Ω
≤
1650
≤
1650
≤
1650
≤
1650
≤
1650
≤
1650
≤
1650
≤
1650
≤
1710
≤
1710
R
(T
sense
+
∆T)
(V
PTC
≤
2.5 V)
Ω
≥
3990
≥
3990
≥
3990
≥
3990
≥
3990
≥
3990
≥
3990
≥
3990
≥
1710
≥
1710
R
(T
sense
+ 15 K)
(V
PTC
≤
7.5 V)
Ω
≥
12 k
≥
12 k
≥
12 k
≥
12 k
≥
12 k
≥
12 k
≥
12 k
≥
12 k
-
-
R
(T
sense
+ 23 K)
(V
PTC
≤
2.5 V)
Ω
-
-
-
-
-
-
-
-
≥
30 k
≥
30 k
Ordering code
M1300
°C
∆T
=
±5
K
100
110
120
130
140
150
155
160
∆T
=
±7
K
170
180
B59300M1100A070
B59300M1110A070
B59300M1120A070
B59300M1130A070
B59300M1140A070
B59300M1150A070
B59300M1155A070
B59300M1160A070
B59300M1170A070
B59300M1180A070
Color coding of litz wires (to DIN 44081)
T
sense
°C
100
110
120
130
140
150
155
160
170
180
Color
red/red
brown/brown
grey/grey
blue/blue
white/blue
black/black
blue/black
blue/red
white/green
white/red
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 3 of 11
Sensors
Motor protection, triple sensors
Reliability data
Test
Electrical endurance,
cycling
Electrical endurance,
constant
Damp heat
Standard
IEC 60738-1
IEC 60738-1
IEC 60738-1
Test conditions
Room temperature, I
Smax
; V
max
Number of cycles: 500 000
Storage at V
max
/T
op,max
(V
max
)
Test duration: 1000 h
Temperature of air: 40
°C
Relative humidity of air: 93%
Duration: 56 days
Test according to IEC 60068-2-78
T
1
= T
op,min
(0 V), T
2
= T
op,max
(0 V)
Number of cycles: 5
Test duration: 30 min
Test according to IEC 60068-2-14, test Na
Frequency range: 10 to 55 Hz
Displacement amplitude: 0.75 mm
Test duration: 3
×
2 h
Test according to IEC 60068-2-6, test Fc
∆R
25
/R
25
< 25%
< 25%
< 10%
M1300
Rapid change
of temperature
IEC 60738-1
< 25%
Vibration
IEC 60738-1
< 5%
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 4 of 11
Sensors
Motor protection, triple sensors
Characteristics (typical)
PTC resistance R
PTC
versus PTC temperature T
PTC
(measured at low signal voltage)
M1300
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 5 of 11
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