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B59083G1120A161

P1-P3P4-P6P7-P9P10-P11
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.
Overcurrent protection for telecom
Single SMDs
Page 7 of 11Please read Cautions and warnings and
Important notes at the end of this document.
Mounting
Electrode must not be scratched before/during/after the mounting process.
Contacts and housing used for assembly with thermistor have to be clean before mounting. Es-
pecially grease or oil must be removed.
When PTC thermistors are encapsulated with sealing material, the precautions given in chapter
"Mounting instructions", "Sealing and potting" must be observed.
When the thermistor is mounted, there must not be any foreign body between the electrode of
the thermistor and the clamping contact.
The minimum force of the clamping contacts pressing against the PTC must be 10 N.
During operation, the thermistor’s surface temperature can be very high. Ensure that adjacent
components are placed at a sufficient distance from the thermistor to allow for proper cooling at
the thermistors.
Ensure that adjacent materials are designed for operation at temperatures comparable to the
surface temperature of thermistor. Be sure that surrounding parts and materials can withstand
this temperature.
Avoid contamination of thermistor surface during processing.
Operation
Use thermistors only within the specified temperature operating range.
Use thermistors only within the specified voltage and current ranges.
Environmental conditions must not harm the thermistors. Use thermistors only in normal at-
mospheric conditions. Avoid use in deoxidizing gases (chlorine gas, hydrogen sulfide gas, am-
monia gas, sulfuric acid gas etc), corrosive agents, humid or salty conditions. Contact with any
liquids and solvents should be prevented.
Be sure to provide an appropriate fail-safe function to prevent secondary product damage
caused by abnormal function (e.g. use VDR for limitation of overvoltage condition).
Overcurrent protection for telecom
Single SMDs
Page 8 of 11Please read Cautions and warnings and
Important notes at the end of this document.
Symbols and terms
A Area
C
th
Heat capacity
f Frequency
I Current
I
max
Maximum current
I
R
Rated current
I
PTC
PTC current
I
r
Residual currrent
I
r,oil
Residual currrent in oil (for level sensors)
I
r,air
Residual currrent in air (for level sensors)
I
RMS
Root-mean-square value of current
I
S
Switching current
I
Smax
Maximum switching current
LCT Lower category temperature
N Number (integer)
N
c
Operating cycles at V
max
, charging of capacitor
N
f
Switching cycles at V
max
, failure mode
P Power
P
25
Maximum power at 25 °C
P
el
Electrical power
P
diss
Dissipation power
R
min
Minimum resistance
R
R
Rated resistance
∆R
R
Tolerance of R
R
R
P
Parallel resistance
R
PTC
PTC resistance
R
ref
Reference resistance
R
S
Series resistance
R
25
Resistance at 25 °C
R
25,match
Resistance matching per reel/ packing unit at 25 °C
∆R
25
Tolerance of R
25
T Temperature
t Time
T
A
Ambient temperature
t
a
Thermal threshold time
T
C
Ferroelectric Curie temperature
Overcurrent protection for telecom
Single SMDs
Page 9 of 11Please read Cautions and warnings and
Important notes at the end of this document.
P1-P3P4-P6P7-P9P10-P11

B59083G1120A161

Mfr. #:
Buy B59083G1120A161
Manufacturer:
EPCOS / TDK
Description:
Thermistors - PTC 1083-B 120-A161 8X2 PTC Thermisto
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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