B59202J0135B010 - EPCOS - Product.Network

Self-protecting resistor for capacitor

charging

PTC thermistors in plastic case

Series/Type: B5920*

Date: December 2006

EPCOS AG 2006. Reproduction, publication and dissemination of this publication, enclosures hereto and the

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

1) Vmax: Maximum permissible DC voltage directly applied to the PTC thermistor.

Applications

Inrush current limiter (charging resistor) for

smoothing and DC link capacitors

To replace high-power fixed resistors for

capacitor charging

Features

Self-protecting in case of malfunction of

short-circuit relay or internal short-circuit of

capacitor

Encased thermistor disk with clamp contacts

For high pulse currents and a high number of

operating cycles

Flame-retardant plastic case

Case material UL-listed

Sn-plated lead-free solder pins

Manufacturer's logo and type designation

stamped on in white

RoHS-compatible

Delivery mode

Packed in carton box

Dimensional drawing

Dimensions in mm

General technical data

Operating cycles at Vmax (charging of capacitor) Nc> 100000 cycles

Switching cycles at Vmax (failure mode) Nf> 10 cycles

Thermal cooling time constant (typical) τth 150 s

Heat capacity (typical) Cth 2.0 J/K

Operating temperature range (V = 0) Top 40/+125 °C

Operating temperature range (V = Vmax) Top 0/+85 °C

Electrical specifications and ordering codes

Vmax1)

VDC

Ω

∆RR

Tref

°C

Ipulse,max

VBD

Ordering code

550 20 30 135 50 > 700 B59201J0140B010

650 56 30 135 25 > 700 B59202J0135B010

800 100 25 130 20 > 900 B59204J0130B010

Self-protecting resistor for capacitor charging

PTC thermistors in plastic case J201, J202, J204

Page 2 of 6Please read Cautions and warnings and

Important notes at the end of this document.

Note

In case the PTC is operated in the AC branch, a max. AC voltage of 440 VRMS can be directly

applied to the PTC thermistor without series current limiting resistor.

Calculation of the number of required PTC elements

Number of required PTC elements (connected in parallel) as function of capacitance and charging

voltage of smoothing or DC link capacitor:

N Number of required PTC thermistors connected in parallel

C Capacitance of smoothing or DC link capacitor in F

V Charging voltage of capacitor in V

Cth Heat capacity in J/K

Tref Reference temperature of PTC in °C

TA,max Expected maximum ambient temperature in °C

In case of large N values the resulting resistance of the parallel PTC network might be too low for

effective limitation of the charging current. In this case a combination of series and parallel

connected PTC thermistors can be used.

Self-protecting resistor for capacitor charging

PTC thermistors in plastic case J201, J202, J204

Page 3 of 6Please read Cautions and warnings and

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

thermistors 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

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 6 months after delivery.

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.

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 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.

Self-protecting resistor for capacitor charging

PTC thermistors in plastic case J201, J202, J204

Page 4 of 6Please read Cautions and warnings and

Important notes at the end of this document.

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).

Self-protecting resistor for capacitor charging

PTC thermistors in plastic case J201, J202, J204

Page 5 of 6Please read Cautions and warnings and

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 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 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.

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, Alu-X, Baoke, CeraDiode, CSSP, MLSC, Phase-

Cap, PhaseMod, SIFERRIT, SIFI, SIKOREL, SilverCap, SIMID, SIOV, SIP5D, SIP5K, Ultra-

Cap, WindCap are trademarks registered or pending in Europe and in other countries. Fur-

ther information will be found on the Internet at www.epcos.com/trademarks.

Important notes

Page 6 of 6