B57153 データシートの表示（PDF） - EPCOS AG

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B57153

NTC thermistors for inrush current limiting

EPCOS AG 

Inrush current limiters

ICLs

B57153

S153

Reliability data

Test

Storage in

dry heat

Storage in damp

heat, steady state

Rapid temperature

cycling

Endurance

Cyclic

endurance

Transient

load

Standard Test conditions

IEC

60068-2-2

IEC

60068-2-78

IEC

60068-2-14

Storage at upper

category temperature

T: 170 °C

t: 1000 h

Temperature of air: 40 °C

Relative humidity of air: 93%

Duration: 21 days

Lower test temperature: 55 °C

Upper test temperature: 170 °C

Number of cycles: 10

I = Imax

t: 1000 h

I = Imax, 1000 cycles

On-time = 1 min

Cooling time = 6 min

Capacitance = Ctest

Number of cycles: 1000

∆R25/R25

(typical)

< 10%

< 5%

< 10%

< 10%

< 10%

< 5%

Remarks

No visible

damage

No visible

damage

No visible

damage

No visible

damage

No visible

damage

No visible

damage

Note

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.

Please read Cautions and warnings and

Important notes at the end of this document.

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