Specialist applications Tip & Ring/Ring Detect capacitors Syfer's range of 250Vdc chip capacitors is ideal for telephone line filtering (Tip & Ring/Ring Detect) applications. Small surface mount package compared to traditional through hole capacitors Suitable as replacements for high voltage leaded film capacitors, thereby saving pcb board space and weight Low ESR Improved temperature performance compared to film capacitors FlexiCapTM option available Capacitance range 250Vdc 1812 2220 2225 100 - 470nF 180 - 820nF 560nF - 1.0F Ordering information - Tip & Ring/Ring Detect capacitors 1812 J 250 0474 K X T Chip size Termination Voltage d.c. Capacitance in picofarads (pF) Capacitance tolerance Dielectric codes Packaging 1812 2220 2225 J = Nickel barrier 250 = 250V First digit is 0. Second and third digits are significant figures of capacitance code. The fourth digit is number of zeros following. J = 5% K = 10% M = 20% X = X7R Y = FlexiCapTM termination base with nickel barrier (100% matte tin plating). RoHS compliant. T = 178mm (7") reel R = 330mm (13") reel Example: 0474 = 470,000pF = 470nF Defined Temperature / Voltage Coefficient of Capacitance X7R capacitors are available from Syfer with a defined capacitance variation under applied dc voltage, across the full operating temperature range. Whilst the capacitance of C0G/NP0 chips does not vary with applied voltage, standard X7R capacitors exhibit capacitance fluctuation, but with no specified limit. For applications where a limit is required, Syfer is able to offer either a "B" code dielectric (conforms to MIL "BX" dielectric and IECQCECC "2X1") or "R" code dielectric (conforms to MIL "BZ" dielectric and IECQ-CECC "2C1"). B = Bulk pack - tubs X7R Dielectric characteristics Stable 2C1 2R1 2X1 EIA - X7R - MIL BZ - BX IECQ-CECC Rated temperature range -55C to +125C Maximum capacitance charge over temperature range No DC voltage applied Rated DC voltage applied Syfer dielectric ordering code 20% 15% 15% +20-30% - +15-25% R X B For part numbering, the "X" denoting the X7R dielectric code needs to be replaced by either "B" or "R". Please contact the Sales Office for full range information. 28