B59008C120A40 - EPCOS - Datasheet.Directory

PTC thermistors as

limit temperature sensors

Leaded disks, coated, miniaturized

Series/Type: B59008

Date: November 2009

information contained therein without EPCOS' prior express consent is prohibited.

Applications

Limit temperature monitoring

Features

Tinned leads

Marked with coded sensing temperature

Characteristics for sensing temperatures

Tsense = 90 to 160 °C conform with DIN 44081

Extremely fast response due to small

dimensions

UL approval to UL 1434 (file number E69802)

RoHS-compatible

Delivery mode

Bulk (standard)

Dimensional drawing

Dimensions in mm

General technical data

Max. operating voltage (TA=0...40°C) Vmax 30 V DC

Max. measuring voltage (TA=25 °C ... Tsense +23 K) Vmeas,max 7.5 V DC

Rated resistance (VPTC ≤2.5 V) RR≤250 Ω

Thermal threshold time ta< 3 s

Operating temperature range (V ≤Vmeas,max) Top 40/ Tsense +23 °C

Operating temperature range (V = Vmax) Top 0/+40 °C

Electrical specifications and ordering codes

Tsense

°C

(Tsense ∆T)

(VPTC ≤2.5 V)

Ω

(Tsense +∆T)

(VPTC ≤2.5 V)

Ω

(Tsense + 15 K)

(VPTC ≤7.5 V)

Ω

(Tsense + 23 K)

(VPTC ≤2.5 V)

Ω

Stamp

code

Ordering code

∆T=±5 K

60 ≤570 ≥570 - ≥4 k f B59008C0060A040

70 ≤570 ≥570 - ≥4 k g B59008C0070A040

80 ≤570 ≥570 - ≥4 k h B59008C0080A040

90 ≤550 ≥1330 ≥4 k - i B59008C0090A040

100 ≤550 ≥1330 ≥4 k - j B59008C0100A040

110 ≤550 ≥1330 ≥4 k - k B59008C0110A040

120 ≤550 ≥1330 ≥4 k - l B59008C0120A040

130 ≤550 ≥1330 ≥4 k - m B59008C0130A040

140 ≤550 ≥1330 ≥4 k - n B59008C0140A040

150 ≤550 ≥1330 ≥4 k - p B59008C0150A040

160 ≤550 ≥1330 ≥4 k - s B59008C0160A040

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Important notes at the end of this document.

Reliability data

Test Standard Test conditions ∆R25/R25

Electrical endurance,

constant

IEC 60738-1 Storage at Vmax /Top,max (Vmax)

Test duration: 1000 h

< 25%

Damp heat IEC 60738-1 Temperature of air: 40 °C

Relative humidity of air: 93%

Duration: 56 days

Test according to IEC 60068-2-78

< 10%

Rapid change

of temperature

IEC 60738-1 T1= Top,min (0 V), T2= Top,max (0 V)

Number of cycles: 5

Test duration: 30 min

Test according to IEC 60068-2-14, Test Na

< 25%

Vibration IEC 60738-1 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

< 5%

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Characteristics (typical)

PTC resistance RPTC versus PTC temperature

TPTC

(measured at low signal voltage)

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Important notes at the end of this document.

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.

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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).

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Important notes at the end of this document.

Symbols and terms

A Area

Cth Heat capacity

f Frequency

I Current

Imax Maximum current

IRRated current

IPTC PTC current

IrResidual 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

ISSwitching current

ISmax Maximum switching current

LCT Lower category temperature

N Number (integer)

NcOperating cycles at Vmax, charging of capacitor

NfSwitching cycles at Vmax, failure mode

P Power

P25 Maximum power at 25 °C

Pel Electrical power

Pdiss Dissipation power

Rmin Minimum resistance

RRRated resistance

∆RRTolerance of RR

RPParallel resistance

RPTC PTC resistance

Rref Reference resistance

RSSeries resistance

R25 Resistance at 25 °C

R25,match Resistance matching per reel/ packing unit at 25 °C

∆R25 Tolerance of R25

T Temperature

t Time

TAAmbient temperature

taThermal threshold time

TCFerroelectric Curie temperature

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tESettling time (for level sensors)

TRRated temperature

Tsense Sensing temperature

Top Operating temperature

TPTC PTC temperature

tRResponse time

Tref Reference temperature

TRmin Temperature at minimum resistance

tSSwitching time

Tsurf Surface temperature

UCT Upper category temperature

V or Vel Voltage (with subscript only for distinction from volume)

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

VRRated voltage

VPTC Voltage drop across a PTC thermistor

αTemperature coefficient

∆Tolerance, change

δth Dissipation factor

τth Thermal cooling time constant

λFailure rate

Lead spacing (in mm)

Abbreviations / Notes

Surface-mount devices

* To be replaced by a number in ordering codes, type designations etc.

+ To be replaced by a letter

All dimensions are given in mm.

The commas used in numerical values denote decimal points.

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Important notes at the end of this document.

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 re-

quirements 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, EPCOS is either unfamiliar with individual customer applications or less familiar

with them than the customers themselves. For these reasons, it is always ultimately incum-

bent on the customer to check and decide whether an EPCOS product with the properties de-

scribed 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 Ma-

terial Data Sheets on the Internet (www.epcos.com/material). Should you have any more de-

tailed 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 fore-

going for customer-specific products.

6. Unless otherwise agreed in individual contracts, all orders are subject to the current ver-

sion of the "General Terms of Delivery for Products and Services in the Electrical In-

dustry" published by the German Electrical and Electronics Industry Association

(ZVEI).

7. The trade names EPCOS, BAOKE, Alu-X, CeraDiode, CSMP, CSSP, CTVS, DeltaCap,

DSSP, MiniBlue, MiniCell, MKK, MLSC, MotorCap, PCC, PhaseCap, PhaseCube,

PhaseMod, PhiCap, SIFERRIT, SIFI, SIKOREL, SilverCap, SIMDAD, SIMID, SineFormer,

SIOV, SIP5D, SIP5K, ThermoFuse, WindCap are trademarks registered or pending

in Europe and in other countries. Further information will be found on the Internet at

www.epcos.com/trademarks.

Important notes

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