PTC thermistors for overcurrent protection Leaded disks, coated, 12 V, 24 V Series/Type: B599*5 Date: February 2012 © EPCOS AG 2012. Reproduction, publication and dissemination of this publication, enclosures hereto and the information contained therein without EPCOS' prior express consent is prohibited.
Overcurrent protection Leaded disks, coated, 12 V, 24 V C935 ... C995 Applications Overcurrent protection Short circuit protection Dimensional drawing Features Lead-free terminals Marking: Type, manufacturer's logo, reference temperature in °C and date code YYWW (except B59995C*) Low resistance For rated currents of up to 1.8 A UL approval to UL 1434 for Vmax = 15 V and VR = 12 V (file number E69802) Qualification based on AEC-Q200, Rev.
Overcurrent protection Leaded disks, coated, 12 V, 24 V C935 ... C995 Electrical specifications and ordering codes Type C935 C945 C955 C965 C975 C985 C995 IR IS ISmax (V = Vmax) mA mA A 1800 1300 850 600 450 250 120 3600 10.0 2600 8.0 1700 5.5 1200 4.3 900 3.0 500 1.0 240 0.7 Ir (typ.) (V = Vmax) mA RR Rmin Ω Ω 170 115 80 70 60 45 25 0.3 0.45 0.8 1.2 1.8 4.6 13 0.2 0.3 0.5 0.7 1.1 2.7 7.
Overcurrent protection Leaded disks, coated, 12 V, 24 V C935 ... C995 Characteristics (typical) PTC resistance RPTC versus PTC temperature TPTC (measured at low signal voltage) PTC current IPTC versus PTC voltage VPTC (measured at 25 °C in still air) Switching time tS versus switching current IS (measured at 25 °C in still air) Rated current IR versus ambient temperature TA (measured in still air) Please read Cautions and warnings and Important notes at the end of this document.
Overcurrent protection Leaded disks, coated, 12 V, 24 V C935 ... C995 Characteristics (typical) PTC resistance RPTC versus PTC temperature TPTC (measured at low signal voltage) PTC current IPTC versus PTC voltage VPTC (measured at 25 °C in still air) Switching time tS versus switching current IS (measured at 25 °C in still air) Rated current IR versus ambient temperature TA (measured in still air) Please read Cautions and warnings and Important notes at the end of this document.
Overcurrent protection Leaded disks, coated, 12 V, 24 V C935 ... C995 Cautions and warnings General EPCOS thermistors are designed for specific applications and should not be used for purposes not identified in our specifications, application notes and data books unless otherwise agreed with EPCOS during the design-in-phase. Ensure suitability of thermistor through reliability testing during the design-in phase. The thermistors should be evaluated taking into consideration worst-case conditions.
Overcurrent protection Leaded disks, coated, 12 V, 24 V C935 ... C995 Mounting Electrode must not be scratched before/during/after the mounting process. Contacts and housing used for assembly with thermistor have to be clean before mounting. Especially grease or oil must be removed. When PTC thermistors are encapsulated with sealing material, the precautions given in chapter "Mounting instructions", "Sealing and potting" must be observed.
Overcurrent protection Leaded disks, coated, 12 V, 24 V C935 ...
Overcurrent protection Leaded disks, coated, 12 V, 24 V TC tE TR Tsense Top TPTC tR Tref TRmin tS Tsurf UCT V or Vel Vc(max) VF,max VRMS VBD Vins Vlink,max Vmax Vmax,dyn Vmeas Vmeas,max VR VPTC α ∆ δth τth λ C935 ...
Important notes The following applies to all products named in this publication: 1. Some parts of this publication contain statements about the suitability of our products for certain areas of application. These statements are based on our knowledge of typical requirements that are often placed on our products in the areas of application concerned.
