B57235S0 datasheet(4/11 Pages) EPCOS

4 / 11 page

NTC thermistors for inrush current limiting

B57235S0***M0**

Inrush Current Limiters (ICLs)

S235/**/M**

PPD VAR PD

2021-04-08

Please read Cautions and warnings and

Page 4 of 11

Important notes 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: 1 000 h

< 20 %

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

< 20 %

No visible

damage

Rapid change of

temperature

IEC

60068-2-14

Lower test temperature: -55 °C

t: 30 min

Upper test temperature: 170 °C

t: 30 min

Time to change from lower to

upper temperature: < 30 s

Number of cycles: 10

< 20 %

No visible

damage

Endurance with

max. current

IEC

60539-1

Ambient temperature: 25 ±5 °C

I = Imax

t: 1000 h

< 20 %

No visible

damage

Cyclic

endurance

IEC

60539-1

Ambient temperature: 25 ±5 °C

I = Imax

On-time = 1 min

Cooling time = 5 min

Number of cycles: 1000

< 20 %

No visible

damage

Maximum

permissible

capacitance test

IEC

60539-1

Ambient temperature: 25 ±5 °C

Capacitance = Ctest

Number of cycles: 1000

< 20 %

No visible

damage

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