PTC thermistors for motor starting
Metallized disks, standard sizes
Series/Type:
Date:
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.
Motor starting
Standard sizes
Applications
Time delay in turning off the auxiliary
winding of single-phase AC motors
(e.g. refrigerator compressors)
Type A314 suitable for air conditioning
systems
Features
Metallization: CrNi (sputtered) + Ag
(screen-printed), except A314
(screen-printed Ag)
Excellent long-term reliability
Suitable for clamp contacting
UL approval to UL 1434 (file number
E69802)
VDE approval (license number 87406 E),
except A524 and A314
CSA approval for A506 (certificate No.
1109600)
RoHS-compatible
Options
Other dimensions and ratings on request
Delivery mode
Bulk
Dimensions (mm)
Type
V
R
= 120 V
RMS
A506
V
R
= 230 V
RMS
A192
A196
A197
A314
A501
A524
A544
w
17.5
±0.5
19.5
±0.5
19.5
±0.5
19.5
±0.5
20.0 +0.2/-0.8
19.5 +0.5
19.5
±0.5
17.5
±0.5
th
2.5
±0.2
2.5
±0.2
3.2
±0.2
3.2
±0.2
5.0
±0.25
2.5
±0.2
2.5
±0.2
2.5
±0.2
Dimensional drawing
A19*, A5**
A314
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 2 of 9
Motor starting
Standard sizes
General technical data
Switching cycles
Operating temperature range
Operating temperature range
(V = 0)
(V = V
max
)
N
T
op
T
op
> 100000
+5/+80
+5/+80
°C
°C
Electrical specifications and ordering codes
Type
I
max
A
V
R
= 120 V
RMS
A506
12
V
R
= 230 V
RMS
A501
6
A524
7
A544
8
A192
8
A196
8
A197
9
A314
9
V
max
V
180
355
300
320
325
350
350
400
T
ref
(typ.)
°C
120
135
135
120
120
120
120
120
t
s1)
s
0.45
0.45
0.55
0.35
0.35
0.50
0.30
0.35
V
BD2)
V
> 360
> 700
> 600
> 650
> 650
> 700
> 700
> 800
R
R
±∆R
R
(V
PTC
≤
2.5 V)
Ω
4.7
±20%
33
±20%
22
±20%
20
±20%
22
±20%
15
±30%
33
±30%
38
±30%
Ordering code
B59506A0120A020
B59501A0135A020
B59524A0135A020
B59544A0120A020
B59192A0120B020
B59196A0120A020
B59197A0120B020
B59314A0120B010
Note:
Type A314 suitable for air conditioning systems.
1) Measured at V = V
max
and I = 0.8 I
max
2) PTC clamped between points.
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 3 of 9
Motor starting
Standard sizes
Reliability data
Test
1)
Electrical endurance,
cycling
Electrical endurance,
constant
Damp heat
Standard
IEC 60738-1
IEC 60738-1
IEC 60738-1
Test conditions
Room temperature, V
max
; I
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
Dry heat: T = T
op,max
(0 V)
Test duration: 16 h
Damp heat first cycle
Cold: T = T
op,min
(0 V)
Test duration: 2 h
Damp heat 5 cycles
Tests performed according to
IEC 60068-2-30
∆R
25
/R
25
< 25%
< 25%
< 20%
Rapid change
of temperature
IEC 60738-1
< 20%
Climatic sequence
IEC 60738-1
< 25%
1) All tests with PTC disk mounted in EPCOS housing.
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 4 of 9
Motor starting
Standard sizes
Cautions and warnings
General
EPCOS thermistors are designed for specific applications and should not be used for purposes
not identified in our specifications, application notes and data books unless otherwise agreed
with EPCOS during the design-in-phase.
Ensure suitability of thermistor through reliability testing during the design-in phase. The ther-
mistors should be evaluated taking into consideration worst-case conditions.
Storage
Store thermistors only in original packaging. Do not open the package before storage.
Storage conditions in original packaging: storage temperature 25
°C
... +45
°C,
relative hu-
midity
≤75%
annual mean, maximum 95%, dew precipitation is inadmissible.
Avoid contamination of thermistors surface during storage, handling and processing.
Avoid storage of thermistor in harmful environment with effect on function on long-term opera-
tion (examples given under operation precautions).
Use thermistor within the following period after delivery:
Through-hole devices (housed and leaded PTCs): 24 months
Motor protection sensors, glass-encapsulated sensors and probe assemblies: 24 months
Telecom pair and quattro protectors (TPP, TQP): 24 months
Leadless PTC thermistors for pressure contacting: 12 months
Leadless PTC thermistors for soldering: 6 months
SMDs in EIA sizes 3225 and 4032, and for PTCs with metal tags: 24 months
SMDs in EIA sizes 0402, 0603, 0805 and 1210: 12 months
Handling
PTCs must not be dropped. Chip-offs must not be caused during handling of PTCs.
Components must not be touched with bare hands. Gloves are recommended.
Avoid contamination of thermistor surface during handling.
Soldering (where applicable)
Use rosin-type flux or non-activated flux.
Insufficient preheating may cause ceramic cracks.
Rapid cooling by dipping in solvent is not recommended.
Complete removal of flux is recommended.
Standard PTC heaters are not suitable for soldering.
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 5 of 9
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