Safety chip capacitors in higher values

May 08, 2013 // By Graham Prophet
Syfer Technology has announced additions to its UL and TÜV approved range of SMD 250Vac safety capacitors. The upper capacitance value has been extended to 33nF.

The new higher capacitance devices expand Syfer’s B16 (TÜV/UL approved) and B17 (TÜV approved) safety certified capacitor ranges. Values in the 2220 package size are now available up to 22nF for the B16 X2 rating, and to 5.6nF for the B17 Y2/X1 rating. If the ProtectiCap option is specified, the upper value for B16 devices increases to 33nF.

The ranges are approved for direct connection across AC mains voltages up to 250Vac. These devices are extensively used for transient and surge protection in networked and mains-based electronic equipment, across a range of industry sectors. They provide valuable safeguards against lightning strikes and other transient events that represent a threat to electronic equipment. Typical applications include data switches/modems and AC-DC power supplies.

Syfer’s FlexiCap™ termination is an option available for all sizes in this range up to and including the 2220 format devices. Syfer offers MLCCs with flexible terminations with certification to IEC, EN and UL safety standards.

Syfer’s says that demand for safety-approved MLCCs is increasing in line with a general trend in the industry to replace film capacitors, in this type of application, with surface mount MLCCs which are smaller and easier to assemble onto printed circuit boards. For engineers designing equipment to meet IEC 60950, these parts have approvals to IEC 60384-14:2005, UL60384-14:2010 as well as UL 60950-1.