B57236(2006) データシートの表示（PDF） - EPCOS AG

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B57236
(Rev.:2006)

NTC thermistors for inrush current limiting Leaded and coated disks

EPCOS AG 

Inrush current limiters

ICLs

B57236

S236

Reliability data

Test

Standard Test conditions

Storage in

dry heat

Storage in damp

heat, steady state

Rapid temperature

cycling

Endurance

Cyclic

endurance

Transient

load

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

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.

Please read Important notes and

Cautions and warnings at the end of this document.

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