PTC thermistors for
overcurrent protection
Leaded disks, coated, 230 V
Series/Type: B598**
Date: February 2018
© EPCOS AG 2018. Reproduction, publication and dissemination of this publication, enclosures hereto and the
information contained therein without EPCOS' prior express consent is prohibited.
EPCOS AG is a TDK Group Company.
Overcurrent protection
Leaded disks, coated, 230 V C810 ... C890
Applications Dimensional drawing
Overcurrent protection
Short circuit protection
Features
Lead-free terminals
Marking: Type, manufacturer's logo,
reference temperature in °C and date code
YYWW (no date code for types with
wmax = 4 mm)
Short response times
UL approval for Tref = 130 °C to UL 1434 with
Vmax = 220 V and VR = 220 V
(file number E69802)
UL approval for Tref = 120 °C to UL 1434 with Dimensions (mm)
Vmax = 230 V and VR = 220 V Type Tref wmax hmax lmin ∅d
(file number E69802) °C
UL approval for Tref = 80 °C to UL 1434 with C810 130 22.0 25.5 35 0.8
Vmax = 165 V and VR = 145 V C830 120 22.0 25.5 35 0.6
(file number E69802) C830 130 17.5 21.0 35 0.8
VDE approval for selected types C840 80 17.5 21.0 35 0.6
(license number 104843) C840 120 17.5 21.0 35 0.6
IECQ certificate for selected types C840 130 13.5 17.0 35 0.6
(file number 101-QA-2) C850 80 13.5 17.0 25 0.6
RoHS-compatible C850 120 13.5 17.0 25 0.6
C850 130 11.0 14.5 25 0.6
Options C860 80 11.0 14.5 25 0.6
Thermistors with diameter w ≤11.0 mm are C860 120 11.0 14.5 35 0.6
also available on tape (to IEC 60286-2) C860 130 9.0 12.5 25 0.6
C870 80 9.0 12.5 25 0.6
Delivery mode C870 120 9.0 12.5 25 0.6
Cardboard strips (standard) C870 130 6.5 10.0 25 0.6
Cardboard tape reeled or in Ammo pack on C872 120 9.0 12.5 25 0.6
request C873 120 9.0 12.5 25 0.6
C874 120 9.0 12.5 25 0.6
C875 120 9.0 12.5 25 0.6
C880 80 6.5 10.0 35 0.6
C880 120 6.5 10.0 25 0.6
C880 130 4.0 7.5 25 0.6
C883 120 6.5 10.0 25 0.6
C890 80 4.0 7.5 25 0.5
C890 120 4.0 7.5 25 0.5
Please read Cautions and warnings and Page 2 of 17
Important notes at the end of this document.
Overcurrent protection
Leaded disks, coated, 230 V C810 ... C890
General technical data
Max. operating voltage (TA = 60 °C) Vmax 265 V DC or V AC
Rated voltage VR 230 V DC or V AC
Switching cycles N 100
Tolerance of RR (Tref = 80 °C or 120 °C) ∆RR ±25 %
Tolerance of RR (Tref = 130 °C) ∆RR ±20 %
Operating temperature range (V = 0) Top 40/+125 °C
Operating temperature range (V = Vmax) Top 0/+60 °C
Electrical specifications and ordering codes
Type IR IS ISmax Ir Tref RR Rmin Approvals Ordering code
(V = Vmax) (typ.) (typ.)
(V = Vmax)
mA mA A mA °C Ω Ω IECQ
C810 650 980 7.0 20 130 3.5 2.3 X B59810C0130A070
C830 460 920 7.0 20 120 3.7 2.4 X B59830C0120A070
C830 450 680 4.1 15 130 5 3.3 X B59830C0130A070
C840 330 660 4.1 15 120 6 3.8 X B59840C0120A070
C840 330 500 2.2 13 130 9 5.9 X B59840C0130A070
C850 200 400 2.2 13 120 10 6.4 X B59850C0120A070
C850 200 320 1.5 10 130 13 8.6 X B59850C0130A070
C840 170 350 4.1 10 80 6 3.6 X X B59840C0080A070
C860 140 280 1.5 10 120 15 9 X B59860C0120A070
C860 140 230 1.0 9 130 25 16.5 X B59860C0130A070
C850 110 230 2.2 8 80 10 6 X X B59850C0080A070
C870 100 200 1.0 9 120 25 15 X B59870C0120A070
C870 100 150 0.4 6 130 50 33 X X B59870C0130A070
C860 90 180 1.5 6 80 15 7.8 X X B59860C0080A070
C872 80 160 1.0 9 120 35 21 X B59872C0120A070
C873 70 140 1.0 9 120 45 27 X B59873C0120A070
C870 60 130 1.0 5 80 25 13 X X B59870C0080A070
C874 60 125 1.0 9 120 55 31 X B59874C0120A070
C875 55 110 1.0 9 120 65 36 X B59875C0120A070
C880 55 110 0.4 6 120 70 39 X X B59880C0120A070
C880 55 90 0.2 5 130 160 106 X X B59880C0130A070
C883 35 70 0.4 5 120 120 67 X X B59883C0120A070
C880 30 70 0.4 4 80 70 36.7 X X B59880C0080A070
C890 30 60 0.2 5 120 150 84 X X B59890C0120A070
C890 15 40 0.2 3 80 150 78.7 X X B59890C0080A070
Please read Cautions and warnings and Page 3 of 17
Important notes at the end of this document.
Overcurrent protection
Leaded disks, coated, 230 V C810 ... C890
Reliability data
Test Standard Test conditions ∆R25/R25
Electrical endurance, IEC 60738-1 Room temperature, ISmax; Vmax < 25%
cycling Number of cycles: 100
Electrical endurance, IEC 60738-1 Storage at Vmax and Top,max (@ Vmax) < 25%
constant Test duration: 1000 h
Damp heat IEC 60738-1 Temperature of air: 40 °C < 10%
Relative humidity of air: 93%
Duration: 56 days
Test according to IEC 60068-2-78
Rapid change IEC 60738-1 T1 = Top,min (0 V), T2 = Top,max (0 V) < 10%
of temperature Number of cycles: 5
Test duration: 30 min
Test according to IEC 60068-2-14, test Na
Vibration IEC 60738-1 Frequency range: 10 to 55 Hz < 5%
Displacement amplitude: 0.75 mm
Test duration: 3 × 2 h
Test according to IEC 60068-2-6, test Fc
Shock IEC 60738-1 Acceleration: 500 m/s2 < 5%
Pulse duration: 11 ms; 6 × 3 pulses
Climatic sequence IEC 60738-1 Dry heat: T = Top,max (0 V) < 10%
Test duration: 16 h
Damp heat first cycle
Cold: T = Top,min (0 V)
Test duration: 2 h
Damp heat 5 cycles
Tests performed according to
IEC 60068-2-30
Please read Cautions and warnings and Page 4 of 17
Important notes at the end of this document.
Overcurrent protection
Leaded disks, coated, 230 V C810 ... C890
Characteristics (typical) for Tref = 80 °C
PTC resistance RPTC versus PTC current IPTC versus PTC voltage VPTC
PTC temperature TPTC (measured at 25 °C in still air)
(measured at low signal voltage)
Switching time tS versus switching current IS Rated current IR versus ambient temperature TA
(measured at 25 °C in still air) (measured in still air)
Please read Cautions and warnings and Page 5 of 17
Important notes at the end of this document.
Overcurrent protection
Leaded disks, coated, 230 V C810 ... C890
Characteristics (typical) for Tref = 80 °C
PTC resistance RPTC versus PTC current IPTC versus PTC voltage VPTC
PTC temperature TPTC (measured at 25 °C in still air)
(measured at low signal voltage)
Switching time tS versus switching current IS Rated current IR versus ambient temperature TA
(measured at 25 °C in still air) (measured in still air)
Please read Cautions and warnings and Page 6 of 17
Important notes at the end of this document.
Overcurrent protection
Leaded disks, coated, 230 V C810 ... C890
Characteristics (typical) for Tref = 120 °C
PTC resistance RPTC versus PTC current IPTC versus PTC voltage VPTC
PTC temperature TPTC (measured at 25 °C in still air)
(measured at low signal voltage)
Switching time tS versus switching current IS Rated current IR versus ambient temperature TA
(measured at 25 °C in still air) (measured in still air)
Please read Cautions and warnings and Page 7 of 17
Important notes at the end of this document.
Overcurrent protection
Leaded disks, coated, 230 V C810 ... C890
Characteristics (typical) for Tref = 120 °C
PTC resistance RPTC versus PTC current IPTC versus PTC voltage VPTC
PTC temperature TPTC (measured at 25 °C in still air)
(measured at low signal voltage)
Switching time tS versus switching current IS Rated current IR versus ambient temperature TA
(measured at 25 °C in still air) (measured in still air)
Please read Cautions and warnings and Page 8 of 17
Important notes at the end of this document.
Overcurrent protection
Leaded disks, coated, 230 V C810 ... C890
Characteristics (typical) for Tref = 120 °C
PTC resistance RPTC versus PTC current IPTC versus PTC voltage VPTC
PTC temperature TPTC (measured at 25 °C in still air)
(measured at low signal voltage)
Switching time tS versus switching current IS Rated current IR versus ambient temperature TA
(measured at 25 °C in still air) (measured in still air)
Please read Cautions and warnings and Page 9 of 17
Important notes at the end of this document.
Overcurrent protection
Leaded disks, coated, 230 V C810 ... C890
Characteristics (typical) for Tref = 130 °C
PTC resistance RPTC versus PTC current IPTC versus PTC voltage VPTC
PTC temperature TPTC (measured at 25 °C in still air)
(measured at low signal voltage)
Switching time tS versus switching current IS Rated current IR versus ambient temperature TA
(measured at 25 °C in still air) (measured in still air)
Please read Cautions and warnings and Page 10 of 17
Important notes at the end of this document.
Overcurrent protection
Leaded disks, coated, 230 V C810 ... C890
Characteristics (typical) for Tref = 130 °C
PTC resistance RPTC versus PTC current IPTC versus PTC voltage VPTC
PTC temperature TPTC (measured at 25 °C in still air)
(measured at low signal voltage)
Switching time tS versus switching current IS Rated current IR versus ambient temperature TA
(measured at 25 °C in still air) (measured in still air)
Please read Cautions and warnings and Page 11 of 17
Important notes at the end of this document.
Overcurrent protection
Leaded disks, coated, 230 V C810 ... C890
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 prior to processing.
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 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 Page 12 of 17
Important notes at the end of this document.
Overcurrent protection
Leaded disks, coated, 230 V C810 ... C890
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 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 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).
This listing does not claim to be complete, but merely reflects the experience of EPCOS AG.
Display of ordering codes for EPCOS products
The ordering code for one and the same EPCOS product can be represented differently in data
sheets, data books, other publications, on the EPCOS 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.epcos.com/orderingcodes
Please read Cautions and warnings and Page 13 of 17
Important notes at the end of this document.
Overcurrent protection
Leaded disks, coated, 230 V C810 ... C890
Symbols and terms
Symbol Term
A Area
C Capacitance
Cth Heat capacity
f Frequency
I Current
Imax Maximum current
IR Rated current
Ires Residual current
IPTC PTC current
Ir Residual currrent
Ir,oil Residual currrent in oil (for level sensors)
Ir,air Residual currrent in air (for level sensors)
IRMS Root-mean-square value of current
IS Switching current
ISmax Maximum switching current
LCT Lower category temperature
N Number (integer)
Nc Operating cycles at Vmax, charging of capacitor
Nf Switching cycles at Vmax, failure mode
P Power
P25 Maximum power at 25 °C
Pel Electrical power
Pdiss Dissipation power
RG Generator internal resistance
Rmin Minimum resistance
RR Rated resistance @ rated temperature TR
∆RR Tolerance of RR
RP Parallel resistance
RPTC PTC resistance
Rref Reference resistance
RS Series resistance
R25 Resistance at 25 °C
R25,match Resistance matching per reel/ packing unit at 25 °C
∆R25 Tolerance of R25
Please read Cautions and warnings and Page 14 of 17
Important notes at the end of this document.
Overcurrent protection
Leaded disks, coated, 230 V C810 ... C890
T Temperature
t Time
TA Ambient temperature
ta Thermal threshold time
TC Ferroelectric Curie temperature
tE Settling time (for level sensors)
TR Rated temperature @ 25 °C or otherwise specified in the data sheet
Tsense Sensing temperature
Top Operating temperature
TPTC PTC temperature
tR Response time
Tref Reference temperature
TRmin Temperature at minimum resistance
tS Switching time
Tsurf Surface temperature
UCT Upper category temperature
V or Vel Voltage (with subscript only for distinction from volume)
Vc(max) Maximum DC charge voltage of the surge generator
VF,max Maximum voltage applied at fault conditions in protection mode
VRMS Root-mean-square value of voltage
VBD Breakdown voltage
Vins Insulation test voltage
Vlink,max Maximum link voltage
Vmax Maximum operating voltage
Vmax,dyn Maximum dynamic (short-time) operating voltage
Vmeas Measuring voltage
Vmeas,max Maximum measuring voltage
VR Rated voltage
VPTC Voltage drop across a PTC thermistor
α Temperature coefficient
∆ Tolerance, change
δth Dissipation factor
τth Thermal cooling time constant
λ Failure rate
Lead spacing (in mm)
Please read Cautions and warnings and Page 15 of 17
Important notes at the end of this document.
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 life-saving 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.
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.
Page 16 of 17
Important notes
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 17 of 17
