PTC Limit Temperature
Sensors
Series/Type:
A603, A601, A602
The following products presented in this data sheet are being withdrawn.
Ordering Code
B59603A0105A062
B59603A0085A062
B59603A0055A062
Substitute Product
Date of Withdrawal
2021-02-19
2021-02-19
2021-02-19
Deadline Last
Orders
2021-05-28
2021-05-28
2021-05-28
Last Shipments
2021-08-27
2021-08-27
2021-08-27
Ordering Code
B59602A0055B062
B59601A0125B062
B59601A0115B062
B59601A0105B062
B59601A0095B062
B59601A0085B062
Substitute Product
Date of Withdrawal
2021-02-19
2021-02-19
2021-02-19
2021-02-19
2021-02-19
2021-02-19
Deadline Last
Orders
2021-05-28
2021-05-28
2021-05-28
2021-05-28
2021-05-28
2021-05-28
Last Shipments
2021-08-27
2021-08-27
2021-08-27
2021-08-27
2021-08-27
2021-08-27
Please contact your nearest TDK sales office if you need support in selecting a suitable substitute. The addresses of our worldwide sales
network are presented at www.tdk-electronics.tdk.com/sales.
Sensors
Limit temperature sensors, EIA case sizes 0402, 0603, 0805
Standard series
Applications
DC/DC converters
Home appliances
Dimmers
Electronic ballasts
Over-temperature protection of power components
Secondary protection of battery packs
SMPS
Notebooks
Features
Fast and reliable response
Suitable for reflow soldering only
Compliant to RoHS directive 2002/95/EC
UL approval to UL1434 for B59404A* and B59601A* (file number E69802)
Lead-free terminations (tinned), except case size 0402
Options
Other Tsense or resistance values on request
Delivery mode
Blister tape (EIA case size 0805) or cardboard tape (EIA case sizes 0402 and 0603),
180-mm reel with 8-mm tape, taping to IEC 60286-3
Packing unit: 4.000 pcs. for EIA case sizes 0603 and 0805, 10.000 pcs. for EIA case size
0402
General technical data
Max. operating voltage
Minimum operating temperature
Maximum operating temperature
(V ≤ Vmax)
(V ≤ Vmax)
1) Top,max = 140 °C for B59404A0130A062
Please read Cautions and warnings and
Important notes at the end of this document.
Page 2 of 19
Vmax
Top,min
Top,max
32
40
125 °C or Tsense,1 +25 °C
whichever is higher1)
V DC
°C
°C
Sensors
Limit temperature sensors, EIA case sizes 0402, 0603, 0805
Standard series
Electrical specifications and ordering codes
EIA case sizes 0402 and 0603
RR
(V ≤ Vmax)
Ω
ΔRR
%
Tsense,1
(@ 4.7 kΩ)
°C
Tsense,1
(@ 4.7 MΩ)
°C
R
(Tsense,1 +10 °C)
kΩ
Ordering code
EIA case size 0402, high ohmic types
±50
130 ±5
B59404A0130A062
10000
EIA case size 0603, standard types
±50
75 ±5
B59601A0075A062
470
±50
85 ±5
B59601A0085A062
470
±50
95 ±5
B59601A0095A062
470
±50
105 ±5
B59601A0105A062
470
±50
115 ±5
B59601A0115A062
470
±50
125 ±5
B59601A0125A062
470
±50
135 ±5
B59601A0135A062
470
EIA case size 0603, tight temperature tolerance types
±50
85 ±3
≥ 15
B59601A0085B062
470
±50
95 ±3
≥ 40
B59601A0095B062
470
±50
105 ±3
≥ 40
B59601A0105B062
470
±50
115 ±3
≥ 40
B59601A0115B062
470
±50
125 ±3
≥ 40
B59601A0125B062
470
Note:
In order to limit self heating effects the electrical power during measurement should be below
2 mW for EIA case size 0402 and below 4 mW for EIA case size 0603.
Please read Cautions and warnings and
Important notes at the end of this document.
Page 3 of 19
Sensors
Limit temperature sensors, EIA case sizes 0402, 0603, 0805
Standard series
Electrical specifications and ordering codes
EIA case sizes 0603 and 0805
RR
(V ≤ Vmax)
ΔRR
Ω
%
Tsense T
(@
2 RR)
°C
°C
T
(typ.)
(@ Rmin)
°C
R
(Tsense,1
5°C)
kΩ
R
(Tsense,1
+5°C)
kΩ
R
(Tsense,1
+15°C)
kΩ
Ordering code
EIA case size 0603, tight resistance tolerance types
±15 70
57 ±3 15
≤ 1.1
≥ 1.1
B59602A0055B062
110
±15 55
45 ±5 5
≤ 4.7
≥ 4.7
B59603A0055A062
470
±15 85
75 ±5 40
≤ 4.7
≥ 4.7
B59603A0085A062
470
±15 105 95 ±5 55
≤ 4.7
≥ 4.7
B59603A0105A062
470
EIA case size 0805, standard types
±50 70
≤ 5.7
≥ 5.7
≥ 401)
B59701A0070A062
680
±50 90
≤ 5.5
≥ 13.3
≥ 40
B59701A0090A062
680
±50 100 ≤ 5.5
≥ 13.3
≥ 40
B59701A0100A062
680
±50 110 ≤ 5.5
≥ 13.3
≥ 40
B59701A0110A062
680
±50 120 ≤ 5.5
≥ 13.3
≥ 40
B59701A0120A062
680
±50 130 ≤ 5.5
≥ 13.3
≥ 40
B59701A0130A062
680
±50 140 ≤ 5.5
≥ 13.3
≥ 40
B59701A0140A062
680
Note:
In order to limit self heating effects the electrical power during measurement should be below
4 mW for EIA case size 0603 and below 6 mW for EIA case size 0805.
1) R (Tsense,1 +25 °C)
Please read Cautions and warnings and
Important notes at the end of this document.
Page 4 of 19
Sensors
Limit temperature sensors, EIA case sizes 0402, 0603, 0805
Standard series
Dimensional drawings in mm
EIA case size 0402
Solder pad
Recommended maximum dimensions (mm)
EIA case size 0603
Solder pad
Recommended maximum dimensions (mm)
EIA case size 0805
Solder pad
Recommended maximum dimensions (mm)
Please read Cautions and warnings and
Important notes at the end of this document.
Page 5 of 19
Sensors
Limit temperature sensors, EIA case sizes 0402, 0603, 0805
Standard series
Characteristics (typical) for B59404A*, EIA case size 0402
PTC resistance RPTC versus PTC temperature TPTC (measured at low signal voltage).
Rmin and Rmax values are typical values for reference only.
Please read Cautions and warnings and
Important notes at the end of this document.
Page 6 of 19
Sensors
Limit temperature sensors, EIA case sizes 0402, 0603, 0805
Characteristics (typical) for B59601A*, EIA case size 0603
PTC resistance RPTC versus PTC temperature TPTC
(measured at low signal voltage)
Please read Cautions and warnings and
Important notes at the end of this document.
Page 7 of 19
Standard series
Sensors
Limit temperature sensors, EIA case sizes 0402, 0603, 0805
Characteristics (typical) for B59601A*, EIA case size 0603
PTC resistance RPTC versus PTC temperature TPTC
(measured at low signal voltage)
Please read Cautions and warnings and
Important notes at the end of this document.
Page 8 of 19
Standard series
Sensors
Limit temperature sensors, EIA case sizes 0402, 0603, 0805
Characteristics (typical) for B59602A* and B59603A*, EIA case size 0603
PTC resistance RPTC versus PTC temperature TPTC
(measured at low signal voltage)
Please read Cautions and warnings and
Important notes at the end of this document.
Page 9 of 19
Standard series
Sensors
Limit temperature sensors, EIA case sizes 0402, 0603, 0805
Characteristics (typical) for B59603A*, EIA case size 0603
PTC resistance RPTC versus PTC temperature TPTC
(measured at low signal voltage)
Please read Cautions and warnings and
Important notes at the end of this document.
Page 10 of 19
Standard series
Sensors
Limit temperature sensors, EIA case sizes 0402, 0603, 0805
Characteristics (typical) for B59701A*, EIA case size 0805
PTC resistance RPTC versus PTC temperature TPTC
(measured at low signal voltage)
Please read Cautions and warnings and
Important notes at the end of this document.
Page 11 of 19
Standard series
Sensors
Limit temperature sensors, EIA case sizes 0402, 0603, 0805
Characteristics (typical) for B59701A*, EIA case size 0805
PTC resistance RPTC versus PTC temperature TPTC
(measured at low signal voltage)
Please read Cautions and warnings and
Important notes at the end of this document.
Page 12 of 19
Standard series
Sensors
Limit temperature sensors, EIA case sizes 0402, 0603, 0805
Standard series
Reliability data
Test
Electrical endurance,
cycling
Electrical endurance,
constant
Damp heat
Standard
IEC 60738-1
Rapid change
of temperature
IEC 60738-1
Vibration
IEC 60738-1
Shock
IEC 60738-1
Climatic sequence
IEC 60738-1
Bending test
IEC 60738-1
IEC 60738-1
IEC 60738-1
Shear test
Resistance to
soldering heat
IEC 60738-1
Please read Cautions and warnings and
Important notes at the end of this document.
Test conditions
Room temperature: Ismax , Vmax;
Number of cycles: 100
Storage at Vmax and Top,max (@ Vmax)
Test duration : 1000 h
Temperature of air: 40 °C
Relative humidity of air: 93%
Duration: 56 days
Test according to IEC 60068-2-78
TLCT = Top,min, TUCT = Top,max
Number of cycles: 5
Test duration: 30 min
Test according to IEC 60068-2-14, test Na
Frequency: 10 - 55 - 10 Hz
Displacement amplitude: 0.75 mm
Test duration: 3 × 2 h
Test according to IEC 60028-2-6, test Fc
Pulse shape: half-sine
Acceleration: 400 m/s2
Pulse duration: 6 ms; 6 x 5000 pulses
Test according to IEC 60068-2-27, test Ea
ΔR25/R25
< 20%
Dry heat: TUCT = 125 °C
Test duration: 16 h
Damp heat first cycle
Cold: TLCT = 40 °C
Test duration: 2 h
Damp heat 5 cycles
Tests performed according to
IEC 60068-2-30
Components reflow-soldered to test board
Maximum bendig: 2 mm
Test according to IEC 60068-2-21, test Ue
Shearing of the component soldered on PCB
by a force of 5 N normal to components
longitudinal axis
Reflow soldering
T= 260 0/+5 °C, tPeak= 30 ... 40 s
Pb-free soldering 3 times
Test according to IEC 60068-2-58
< 20%
Page 13 of 19
< 25%
< 20%
< 20%
< 20%
< 20%
< 20%
No
visible
damage
< 20%
Sensors
Limit temperature sensors, EIA case sizes 0402, 0603, 0805
Standard series
Cautions and warnings
General
TDK Electronics 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 TDK Electronics during the design-in-phase.
Ensure suitability of thermistor through reliability testing during the design-in phase. The thermistors should be evaluated taking into consideration worst-case conditions.
Storage
Store thermistors only in original packaging. Do not open the package prior to processing.
Storage conditions in original packaging: storage temperature 25 °C ... +45 °C, relative humidity ≤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 operation (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 1210 and smaller: 12 months
Handling
PTCs must not be dropped. Chip-offs must not be caused during handling of PTCs.
The ceramic and metallization of the 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 14 of 19
Sensors
Limit temperature sensors, EIA case sizes 0402, 0603, 0805
Standard series
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. Especially 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 and pressure of the clamping contacts pressing against the PTC must be
10 N and 50 kPa, respectively. In case the assembly is exposed to mechanical shock and/ or
vibration this force should be higher in order to avoid movement of the PTC during operation.
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 atmospheric conditions. Avoid use in deoxidizing gases (chlorine gas, hydrogen sulfide gas, ammonia 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).
This listing does not claim to be complete, but merely reflects the experience of TDK Electronics.
Display of ordering codes for TDK Electronics products
The ordering code for one and the same product can be represented differently in data sheets,
data books, other publications, on the company website, or in order-related documents such as
shipping notes, order confirmations and product labels. The varying representations of the
ordering codes are due to different processes employed and do not affect the
specifications of the respective products. Detailed information can be found on the Internet
under www.tdk-electronics.tdk.com/orderingcodes.
Please read Cautions and warnings and
Important notes at the end of this document.
Page 15 of 19
Sensors
Limit temperature sensors, EIA case sizes 0402, 0603, 0805
Symbols and terms
Symbol
A
C
Cth
f
I
Imax
IR
Ires
IPTC
Ir
Ir,oil
Ir,air
IRMS
IS
ISmax
LCT
N
Nc
Nf
P
P25
Pel
Pdiss
RG
Rmin
RR
ΔRR
RP
RPTC
Rref
RS
R25
R25,match
ΔR25
Term
Area
Capacitance
Heat capacity
Frequency
Current
Maximum current
Rated current
Residual current
PTC current
Residual currrent
Residual currrent in oil (for level sensors)
Residual currrent in air (for level sensors)
Root-mean-square value of current
Switching current
Maximum switching current
Lower category temperature
Number (integer)
Operating cycles at Vmax, charging of capacitor
Switching cycles at Vmax, failure mode
Power
Maximum power at 25 °C
Electrical power
Dissipation power
Generator internal resistance
Minimum resistance
Rated resistance @ rated temperature TR
Tolerance of RR
Parallel resistance
PTC resistance
Reference resistance
Series resistance
Resistance at 25 °C
Resistance matching per reel/ packing unit at 25 °C
Tolerance of R25
Please read Cautions and warnings and
Important notes at the end of this document.
Page 16 of 19
Standard series
Sensors
Limit temperature sensors, EIA case sizes 0402, 0603, 0805
T
t
TA
ta
TC
tE
TR
Tsense
Top
TPTC
tR
Tref
TRmin
tS
Tsurf
UCT
V or Vel
Vc(max)
VF,max
VRMS
VBD
Vins
Vlink,max
Vmax
Vmax,dyn
Vmeas
Vmeas,max
VR
VPTC
α
Δ
δth
τth
λ
Standard series
Temperature
Time
Ambient temperature
Thermal threshold time
Ferroelectric Curie temperature
Settling time (for level sensors)
Rated temperature @ 25 °C or otherwise specified in the data sheet
Sensing temperature
Operating temperature
PTC temperature
Response time
Reference temperature
Temperature at minimum resistance
Switching time
Surface temperature
Upper category temperature
Voltage (with subscript only for distinction from volume)
Maximum DC charge voltage of the surge generator
Maximum voltage applied at fault conditions in protection mode
Root-mean-square value of voltage
Breakdown voltage
Insulation test voltage
Maximum link voltage
Maximum operating voltage
Maximum dynamic (short-time) operating voltage
Measuring voltage
Maximum measuring voltage
Rated voltage
Voltage drop across a PTC thermistor
Temperature coefficient
Tolerance, change
Dissipation factor
Thermal cooling time constant
Failure rate
Lead spacing (in mm)
Please read Cautions and warnings and
Important notes at the end of this document.
Page 17 of 19
Important notes
The following applies to all products named in this publication:
1. Some parts of this publication contain statements about the suitability of our products for
certain areas of application. These statements are based on our knowledge of typical requirements that are often placed on our products in the areas of application concerned. We
nevertheless expressly point out that such statements cannot be regarded as binding
statements about the suitability of our products for a particular customer application.
As a rule, we are either unfamiliar with individual customer applications or less familiar with
them than the customers themselves. For these reasons, it is always ultimately incumbent on
the customer to check and decide whether a product with the properties described in the
product specification is suitable for use in a particular customer application.
2. We also point out that in individual cases, a malfunction of electronic components or
failure before the end of their usual service life cannot be completely ruled out in the
current state of the art, even if they are operated as specified. In customer applications
requiring a very high level of operational safety and especially in customer applications in
which the malfunction or failure of an electronic component could endanger human life or
health (e.g. in accident prevention or lifesaving systems), it must therefore be ensured by
means of suitable design of the customer application or other action taken by the customer
(e.g. installation of protective circuitry or redundancy) that no injury or damage is sustained by
third parties in the event of malfunction or failure of an electronic component.
3. The warnings, cautions and product-specific notes must be observed.
4. In order to satisfy certain technical requirements, some of the products described in this
publication may contain substances subject to restrictions in certain jurisdictions (e.g.
because they are classed as hazardous). Useful information on this will be found in our Material Data Sheets on the Internet (www.tdk-electronics.tdk.com/material). Should you have
any more detailed questions, please contact our sales offices.
5. We constantly strive to improve our products. Consequently, the products described in this
publication may change from time to time. The same is true of the corresponding product
specifications. Please check therefore to what extent product descriptions and specifications
contained in this publication are still applicable before or when you place an order. We also
reserve the right to discontinue production and delivery of products. Consequently, we
cannot guarantee that all products named in this publication will always be available. The
aforementioned does not apply in the case of individual agreements deviating from the foregoing for customer-specific products.
6. Unless otherwise agreed in individual contracts, all orders are subject to our General
Terms and Conditions of Supply.
Page 18 of 19
Important notes
7. Our manufacturing sites serving the automotive business apply the IATF 16949
standard. The IATF certifications confirm our compliance with requirements regarding the
quality management system in the automotive industry. Referring to customer requirements
and customer specific requirements (“CSR”) TDK always has and will continue to have the
policy of respecting individual agreements. Even if IATF 16949 may appear to support the
acceptance of unilateral requirements, we hereby like to emphasize that only requirements
mutually agreed upon can and will be implemented in our Quality Management System.
For clarification purposes we like to point out that obligations from IATF 16949 shall only
become legally binding if individually agreed upon.
8. The trade names EPCOS, CeraCharge, CeraDiode, CeraLink, CeraPad, CeraPlas, CSMP,
CTVS, DeltaCap, DigiSiMic, ExoCore, FilterCap, FormFit, LeaXield, MiniBlue, MiniCell, MKD,
MKK, MotorCap, PCC, PhaseCap, PhaseCube, PhaseMod, PhiCap, PowerHap, PQSine,
PQvar, SIFERRIT, SIFI, SIKOREL, SilverCap, SIMDAD, SiMic, SIMID, SineFormer, SIOV,
ThermoFuse, WindCap are trademarks registered or pending in Europe and
in other countries. Further information will be found on the Internet at
www.tdk-electronics.tdk.com/trademarks.
Release 2018-10
Page 19 of 19