C840 datasheet(4/16 Pages) EPCOS

Part #	C840

Description	PTC thermistors for overcurrent protection

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Manufacturer	EPCOS [EPCOS]

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Reliability data

Test

Standard

Test conditions

∆R25/R25

Electrical endurance,

cycling

IEC 60738-1

Room temperature, ISmax; Vmax

Number of cycles: 100

< 25%

Electrical endurance,

constant

IEC 60738-1

Storage at Vmax /Top,max (Vmax)

Test duration: 1000 h

< 25%

Damp heat

IEC 60738-1

Temperature of air: 40

°C

Relative humidity of air: 93%

Duration: 56 days

Test according to IEC 60068-2-78

< 10%

Rapid change

of temperature

IEC 60738-1

T1 = Top,min (0 V), T2 = Top,max (0 V)

Number of cycles: 5

Test duration: 30 min

Test according to IEC 60068-2-14, test Na

< 10%

Vibration

IEC 60738-1

Frequency range: 10 to 55 Hz

Displacement amplitude: 0.75 mm

Test duration: 3

× 2 h

Test according to IEC 60068-2-6, test Fc

< 5%

Shock

IEC 60738-1

Acceleration: 390 m/s2

Pulse duration: 6 ms; 6

× 4000 pulses

< 5%

Climatic sequence

IEC 60738-1

Dry heat: T = Top,max (0 V)

Test duration: 16 h

Damp heat first cycle

Cold: T = Top,min (0 V)

Test duration: 2 h

Damp heat 5 cycles

Tests performed according to

IEC 60068-2-30

< 10%

Overcurrent protection

Leaded disks, coated, 230 V

C810 ... C890

Page 4 of 16

Please read Cautions and warnings and

Important notes at the end of this document.

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