TDK has introduced a series of high-value metal-framed multi-chip ceramic capacitors for automotive electric power trains, on-board chargers and wireless power transfer systems, where the capacitors must handle high currents or voltages, or have high capacity. “To meet these needs, TDK developed the CA series, the largest MLCCs in the industry [6 x 5.6 x 6.4mm] with a metal frame ...
Passives
AEC-Q200 transformer isolates battery management signals
Bourns has created an AEC-Q200 compliant 1:1 signal isolation transformer for automotive battery management systems. SM91872AL is surface-mount and will fit into a 17.4 x 10.6 x 8.1 envelope – including its visible legs. Inductance is 150 to 450µH (100kHz 100mV) across its -40 to +125°C operation range, and leakage inductance is 1µH max. Both sides have a maximum resistance ...
lo temp co RF ceramic capacitors for comms
Kyocera AVX has released low-ESR C0G/NP0 dielectric RF MLCCs (multi-layer ceramic chip capacitors) “inspired by communications market demand for smaller RF capacitors that deliver repeatable performance”, it said. Called KGU, they come in values from 0.1 to 100pF with tolerances as low as ±0.05pF. They come in four chip sizes: 01005, 0402, 0603 or 0805 (EIA). Class I C0G, also ...
Sticky-back EMI reduction patches
Würth Elektronik has created a sticky-back tape that blocks or absorbs electric and magnetic fields across 100Hz to 25GHz. Called WE-EMIP EMI absorber sheet, is only 72μm thick and consists of a layer of aluminium, a magnetic absorber layer (100μ0 permeability at 1MHz) and a polymer carrier layer. “It offers attenuation exceeding 40dB over a wide frequency range,” according to ...
Precision shunts from 1A to 6,000A
Bourns has added six shunt resistor types its Riedon range, that it acquired in April last year when it bought Riedon Inc. Construction is with brass end-caps holding Manganin resistance elements. The latter has a temperature coefficient ~±15ppm/°C. Kelvin contacts are provided for the voltage output. Panel-mount RS resistors have values from 41.7μΩ to 20mΩ (±0.25%). There are sub-versions here: ...
SMD resistors to AEC-Q200
Bourns has created a surface-mount thin-film resistor series with AEC-Q200 compliance for automotive use. Model CRT-A resistors are available with tolerance of ±0.1, ±0.25, ±0.5 or ±1%, and temperature coefficients of ±50, ±25, ±15 or ±10ppm/°C. These compact, yet high power-rated resistors offering accurate resistance levels are increasingly required in space-constrained applications such as mobile phones, SD cards, DDR memory ...
1mm glass resistors work from dc to 40GHz
Richardson RFPD is stocking 0402 (1005 metric) glass sandwich resistors designed to work from dc to 40GHz. Made by Kyocera AVX, and called the UBR series, they measure 1 x 0.5 x 0.5mm and have a flexible termination. “‘Flexiterm’ is a surface-mountable, automotive-qualified termination that adds an extra margin of protection against damage due to flexure during installation,” according to ...
EMIS EMC filter for higher current rating applications
The chassis mounting MF423-3-3D-BB three phase EMC filter series from EMC specialist EMIS is designed for higher current rating applications such as photovoltaic (PV) and power drive systems and offers the superior attenuation required to meet relevant EMC Standards. Installed on the mains input side of equipment the filters significantly improve conducted immunity and reliability. The devices are fitted with ...
Murata claims first MLCC with a capacitance of 100μF in a 0603-inch size package
Murata claims to have made the world’s first MLCC to provide a capacitance of 100μF in a 0603-inch (1608mm) size package with its GRM188C80E107M and GRM188R60E107M devices. With its compact packaging, 2.5V rated, low equivalent series resistance (ESR) and impedance, and X6S/X5R temperature classes, the new GRM188 is suitable for decoupling and smoothing circuits in demanding computer and network environments. ...
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