C1805 データシートの表示（PDF） - EPCOS AG

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C1805

PTC thermistors for overcurrent protection in telecom applications

EPCOS AG 

Overcurrent protection for telecom

Leaded disks

tE

TR

Tsense

Top

TPTC

tR

Tref

TRmin

tS

Tsurf

UCT

V or Vel

VRMS

VBD

Vins

Vlink,max

Vmax

Vmax,dyn

Vmeas

Vmeas,max

VR

VPTC

α

∆

δth

τth

λ

Settling time (for level sensors)

Rated temperature

Sensing temperature

Operating temperature

PTC temperature

Response time

Reference temperature

Temperature at minimum resistance

Switching time

Surface temperature

Upper category temperature

Voltage (with subscript only for distinction from volume)

Root-mean-square value of voltage

Breakdown voltage

Insulation test voltage

Maximum link voltage

Maximum operating voltage

Maximum dynamic (short-time) operating voltage

Measuring voltage

Maximum measuring voltage

Rated voltage

Voltage drop across a PTC thermistor

Temperature coefficient

Tolerance, change

Dissipation factor

Thermal cooling time constant

Failure rate

Lead spacing (in mm)

Abbreviations / Notes

Surface-mount devices

* To be replaced by a number in ordering codes, type designations etc.

+ To be replaced by a letter

All dimensions are given in mm.

The commas used in numerical values denote decimal points.

Please read Cautions and warnings and

Important notes at the end of this document.

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