B57364S0109L002 - EPCOS AG

NTC thermistors for

inrush current limiting

Leaded and coated disks,

insulation voltage 1000 VDC

Series/Type: B57364

Date: March 2006

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

1) For details on the capacitance Ctest as well as on the parameters k and n refer to "Application Notes", chapters 2.6 and 2.7.

Applications

Switch-mode power supplies

Soft-start motors, e.g. in vacuum cleaners

Features

Improved insulation voltage

Useable in series connections up to 265 Vrms

Coated thermistor disk

Kinked leads of tinned copper wire

Wide resistance range

UL approval (E69802)

Options

Alternative lead configurations available on

request

Delivery mode

Bulk (standard),

cardboard tape, reeled or in Ammo pack

Dimensional drawing

Dimensions in mm

Approx. weight 4 g

General technical data

Climatic category (IEC 60068-1) 55/170/21

Max. power (at 25 °C) Pmax 5.1 W

Resistance tolerance ∆RR/RR±15 %

Rated temperature TR25 °C

B value tolerance ∆B/B ±3 %

Dissipation factor (in air) δth approx. 24 mW/K

Thermal cooling time constant (in air) τcapprox. 100 s

Heat capacity Cth approx. 2400 mJ/K

Test voltage (t = 1 s) Vtest 1000 VDC

Electrical specification and ordering codes

R25

Ω

Imax

(0...65 °C)

No. of

R/T char-

acteristic

B25/100

Ctest1)

230 V

µF

Ctest1)

110 V

µF

Param.

for R(I)1)

Param.

for R(I)1)

Ordering code

116.0 1202 2800 1000 4000 0.766 1.30 B57364S0109L002

212.0 1203 2900 1000 4000 0.966 1.32 B57364S0209L002

2.5 11.0 1203 2900 1000 4000 1.04 1.32 B57364S0259L002

49.5 1308 3060 1000 4000 1.20 1.34 B57364S0409L002

58.5 1308 3060 1000 4000 1.29 1.34 B57364S0509L002

10 7.5 1304 3300 1000 4000 1.55 1.37 B57364S0100L002

Inrush current limiters B57364

ICLs, insulation voltage 1000 VDC for 1 s S364

Page 2 of 6Please read Important notes and

Cautions and warnings at the end of this document.

Reliability data

Test Standard Test conditions ∆R25/R25

(typical)

Remarks

Storage in

dry heat

IEC

60068-2-2

Storage at upper

category temperature

T: 170 °C

t: 1000 h

< 10% No visible

damage

Storage in damp

heat, steady state

IEC

60068-2-78

Temperature of air: 40 °C

Relative humidity of air: 93%

Duration: 21 days

< 5% No visible

damage

Rapid temperature

cycling

IEC

60068-2-14

Lower test temperature: 55 °C

Upper test temperature: 170 °C

Number of cycles: 10

< 10% No visible

damage

Endurance I = Imax

t: 1000 h

< 10% No visible

damage

Cyclic

endurance

I=Imax, 1000 cycles

On-time = 1 min

Cooling time = 6 min

< 10% No visible

damage

Transient

load

Capacitance = Ctest

Number of cycles: 1000

< 5% No visible

damage

Cautions and warnings for ICLs

The self-heating of a thermistor during operation depends on the load applied and the applicable

dissipation factor.

When loaded with maximum allowable current/power and the specified dissipation factor is taken

as a basis, the NTC thermistor may reach a mean temperature of up to 250 °C.

The heat developed during operation will also be dissipated through the lead wires. So the

contact areas, too, may become quite hot at maximum load.

When mounting NTC thermistors you have to ensure that there is an adequate distance between

the thermistor and all parts which are sensitive to heat or combustible.

Inrush current limiters B57364

ICLs, insulation voltage 1000 VDC for 1 s S364

Page 3 of 6Please read Important notes and

Cautions and warnings at the end of this document.

Cautions and warnings

General

See "Important notes" at the end of this document.

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

humidity ≤75% annual mean, maximum 95%, dew precipitation is inadmissible.

Do not store SMDs where they are exposed to heat or direct sunlight. Otherwise, the packing

material may be deformed or SMDs may stick together, causing problems during mounting.

Avoid contamination of thermistors surface during storage, handling and processing.

Avoid storage of thermistor in harmful environments like corrosive gases (SOx, Cl etc).

After opening the factory seals, such as polyvinyl-sealed packages, use the SMDs as soon as

possible.

Solder thermistors after shipment from EPCOS within the time specified:

SMDs: 12 months

Leaded components: 24 months

Handling

NTC thermistors must not be dropped. Chip-offs must not be caused during handling of NTCs.

Components must not be touched with bare hands. Gloves are recommended.

Avoid contamination of thermistor surface during handling.

Soldering

Use resin-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.

Mounting

When NTC thermistors are encapsulated with sealing material or overmolded with plastic

material, the precautions given in chapter “Mounting instructions”, “Sealing, potting and

overmolding” must be observed.

Electrode must not be scratched before/during/after the mounting process.

Contacts and housings used for assembly with thermistor have to be clean before mounting.

During operation, the thermistor’s surface temperature can be very high (ICL). Ensure that

adjacent components are placed at a sufficient distance from the thermistor to allow for proper

cooling ot the thermistors.

Ensure that adjacent materials are designed for operation at temperatures comparable to the

surface temperature of the thermistor. Be sure that surrounding parts and materials can

withstand this temperature.

Make sure that thermistors (ICLs) are adequately ventilated to avoid overheating.

Avoid contamination of thermistor surface during processing.

Inrush current limiters B57364

ICLs, insulation voltage 1000 VDC for 1 s S364

Page 4 of 6Please read Important notes and

Cautions and warnings at the end of this document.

Operation

Use thermistors only within the specified operating temperature range.

Use thermistors only within the specified voltage and current ranges (ICLs).

Environmental conditions must not harm the thermistors. Use thermistors only in normal

atmospheric conditions.

Contact of NTC thermistors with any liquids and solvents should be prevented. It must be

ensured that no water enters the NTC thermistor (e.g. through plug terminals). For

measurement purposes (checking the specified resistance vs. temperature), the component

must not be immersed in water but in suitable liquids (e.g. Galden).

Avoid dewing and condensation.

Be sure to provide an appropriate fail-safe function to prevent secondary product damage

caused by malfunction (e.g. use VDR for limitation of overvoltage condition).

Inrush current limiters B57364

ICLs, insulation voltage 1000 VDC for 1 s S364

Page 5 of 6Please read Important notes and

Cautions and warnings 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 passive electronic compon-

ents 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 applica-

tions requiring a very high level of operational safety and especially in customer applications

in which the malfunction or failure of a passive 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 a passive 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.epcos.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 or-

der.

We also reserve the right to discontinue production and delivery of products. Con-

sequently, we cannot guarantee that all products named in this publication will always be

available.

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, EPCOS-JONES, Baoke, CeraDiode, CSSP, MLSC, PhaseCap,

PhaseMod, SIFI, SIKOREL, SilverCap, SIMID, SIOV, SIP5D, SIP5K, UltraCap, 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

Page 6 of 6