Vishay introduces new capacitors and resistors

07/27/2012

This month Vishay Intertechnology Inc, introduces a new series of three-phase cylindrical capacitors for power electronics featuring high current capabilities, nine standard voltage ratings from 400 VAC to 1650 VAC, and a wide range of capacitance values and packaging options. In Europe Rutronik distributes Vishay’s newest resistors with high power rating and extremely low resistance values.

EMKP capacitors

The EMKP capacitors are available in four heights from 160 mm to 265 mm and in five diameters from 64 to 136 mm. They offer high current ratings up to 3 x 56 A and 3 x 104 A (depending on the bushing type), impulse currents up to 21.3 kA, very low self-inductance of less than 100 nanohenries, low series resistance to 0.6 milliohms, and capacitance values from 4.0 to 600 microfarads with a capacitance tolerance of 5%.

Optimized for power factor correction, AC filtering, and harmonic filtering applications in three-phase mains, traction and industrial drives and converters, wind turbines, and solar inverters, the EMKP three-phase capacitors are metalized polypropylene film devices with self-healing technology.

EMKP 3-phase devices offer a high reliability rating of 120 FIT and a long lifetime expectancy of 100,000 hours at + 70 °C at rated voltage. The capacitors are specified for an operating temperature of - 40 °C to + 85 °C and meet IEC 61071-1, IEC 61881, and IEC 60831 standards. Terminal-to-terminal test voltage is 1.5 times the rated AC voltage for 10 seconds.

Samples and production quantities of the new EMKP three-phase series capacitors are available now, with lead times of eight to 10 week

Rutronik distributes Vishay’s new resistors

The two new surface-mount Power Metal Strip resistors from Vishay combine high power ratings from 5W to 10W with extremely low resistance values down to 0.0003 Ω and are available in 3921 and 5931 case sizes from European distributor Rutronik.

The construction of the WSLP3921 and WSLP5931 resistors incorporates a solid metal nickel-chrome or manganese-copper alloy resistive element with low TCR (< 20 PPM/°C) and stabilized material. This results in a high-power resistor with an operating temperature range of -65°C to +170°C, while maintaining the superior electrical characteristics of the Power Metal Strip construction.

The new devices allow for the design of high-power circuits featuring the smallest possible resistor for higher-performance end products. Their high-temperature capability allows for their use in harsh, high-temperature environments without sacrificing power rating or electrical performance.

The resistors are ideal for all types of current sensing, voltage division, and pulse applications, including switching and linear power supplies, instruments, and power amplifiers in automotive electronic controls such as engine, anti-lock brakes, and climate controls; industrial controls, including down-hole test/measurement equipment for oil/gas well drilling; and inverter controls for HVAC systems.

WSLP3921 resistor measures 10 x 5.2 mm with a maximum height profile of 0.5 mm, while the WSLP5931 measures 15.0 x 7.75 mm with a height profile of 0.5 mm. The proprietary processing technique produces extremely low resistance values ranging from 0.0003 Ω to 0.004 Ω, with tight tolerances of 1.0 % and 5.0 %. The devices provide very low inductance of 0.5 ηH to 5 ηH and low thermal EMF (<3 µV/°C).

www.vishay.com

www.rutronik.com