Tag Archives: Bourns

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 ...

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: ...

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 ...

Although engineers design predominantly digital systems, they will always need some analogue knowledge, say Scott Carson and Jed Boyer. The drive to minimise power consumption in everyday devices via digitisation means much of the infrastructure needed to power these devices is largely analogue at its core. With analogue design being such a critical skill for systems engineers, it is quite ...

Bourns has added 20 Multifuse polymer PTC resettable fuses in 1206 packages to its circuit protection portfolio, the Model MF-NSMF series. The new higher power rated fuses provide expanded over current/over temperature protection selection options in the compact 1206 footprint to save board real estate or to reduce design size and costs. The latest additions to the portfolio use the ...

Bourns has introduced a series of gas discharge tubes for protecting equipment against high-voltage surges. The bidirectional GDT28H series has devices with breakdown voltages from 1 to 3.3kVdc, and all are 8mm in diameter and 6mm long, with out without axial leads. Picking the nominally 2kV GDT28H-200 as an example, breakdown is between 1,600 and 2,400V (100V/s). Arc voltage is ...

Bourns has announced a AEC-Q200 compliant, automotive grade semi-shielded power inductor series that operates across -40 to 150°C. SRN8040HA inductors are constructed using a “silicon-based coating that offers magnetic shielding”, according to the company. They “are designed to release lower magnetic field radiation compared to non-shielded inductors, and are a more cost-efficient alternative to fully shielded ferrite-based inductors”. The data ...

Bourns is aiming at high power density forward converters with a series of planar construction transformers. Called the PLN0xx-ED21 series, of them the company said: “Planar-style transformer components offer efficiency and power density advantages over conventional wire-wound transformer designs due to significantly reduced ac resistance losses.” Ratings vary across 48 to 70W with inputs from 33 to 57Vdc when switching ...

Bourns has released its highest current carrying bi-directional transient voltage suppressor diode series in surface-mount DFN packaging (17 x 15 x 2.5mm in this case). Model PTVS20-015C-H is capable of handling 20kA surges. “The diode meets IEC 61000-4-2 Level 4 ESD protection requirements. It also assists in meeting IEC 61000-4-5 8/20 μs current surge requirements for lightning protection and is ...

Bourns has introduced two series of high-grade surface-mount fuses, rated to 150°C. SF-0603SA-M and SF-1206SA-M have slow-blow characteristics, conducting for at least four hours at rated current, and clearing within 5s at room temperature and 2.5x rated current. They come in EIA 0603 and 1206 footprints respectively, and are of multilayer ceramic construction with protection against thermal shock, salt spray and mechanical ...