Saturday, October 14, 2006

 

Military standard capacitors extend to 50V

Kemet has extended its T409 and T429 series of established reliability, military standard qualified, surface mount tantalum capacitor ranges to include 50V-rated parts.

Kemet has extended its T409 (CWR09 style) and T429 (CWR29 style) series of established reliability, military standard qualified (MIL-PRF-55365/4 and /11), surface mount tantalum capacitor ranges to include 50V-rated parts. The company has also enhanced the T409, T429 and T419 (CWR19 style) series by offering them with three new termination options. Complementing the current solder-plated format, the new termination styles are gold plated, hot solder dipped, and solder fused.

This selection of finishes provides maximum flexibility to aerospace designers for who part compliance to MIL-PRF-55365 is a prerequisite.

The introduction of military standard qualified, 50V parts, covers the complete listing of CWR09 and CWR29 styles - a total of 22 new part numbers.

The new additions include case sizes A through to H with capacitance values of 0.1 to 4.7uF.

100% surge current testing and Weibull grading (B and C levels) is available as an option for all case sises.

Typical applications for the -55 to +125C rated parts include decoupling, bypass, filtering and R-C timing circuits.

Kemet's T409, T419 and T429 capacitors are packaged in precision moulded, laser marked cases, and are shipped in tape and reel packaging (per EIA 481-1) ready for automated assembly processes.

 

Silicon resistors meet military demands

Silicon resistors are constructed using proprietary thin film technology and have higher power ratings than alumina due to the reduced thermal resistance of the silicon substrate.

State of the Art (SOTA) offers enhanced performance MIL-PRF-38534 compliant silicon high-reliability chip resistors. The resistors are available in four different case sizes - 0202, 0303, 0404 and 0505 -with tolerances to 0.1%, power ratings from 100 to 500mW, temperature coefficients of resistance as low as 25ppm, and voltage ratings at 100V. The operating range for these resistors is from -55 to +125C.

Devices are available in termination type A (wire bondable) or termination style D (wire bondable with a metallised bottom).

Silicon resistors are constructed using proprietary thin film technology and have higher power ratings than alumina due to the reduced thermal resistance of the silicon substrate.

Reliability is assured by extensive in-house testing - users can select from a wide variety of testing options.

Testing to customer source controlled drawings is also available.

SOTA chip resistors are designed for use in a wide range of high reliability applications including medical electronics, defence systems, microwave communications, aerospace electronics and satellite systems.

Friday, October 13, 2006

 

Inductor helps shrink Trafficmaster telemetry unit

Trafficmaster has worked in partnership with C and D Technologies to develop a custom inductor solution for use in its Smartnav system.

Trafficmaster has worked in partnership with C and D Technologies to develop a custom inductor solution for use in its Smartnav system. The resultant component, the CD1243, is a high performance, surface mount, low-profile bobbin format inductor with dual winding. Overcoming a challenging design brief, C and D Technologies engineers have successfully realised a design acceptable to Trafficmaster's exacting electrical, physical and thermal criteria.

With Smartnav, the expensive hardware and mapping database associated with conventional line fitted in-car systems is housed off-board in a central server computer.

The only hardware in the vehicle is a GPS satellite-based positioning device and a small telematics control unit (TCU).

Occupying only 25% of the PCB area of the previous solution, and with a height of just 8mm, the CD1243 helped Smartnav's designers keep the TCU's overall size to a minimum.

As the unit is designed for the automotive aftermarket, small dimensions are essential in order for the unit to be fitted discreetly in the vehicle cabin.

With the proliferation of electrical and electronic equipment now present in passenger vehicles, the operating environment is electrically very noisy; To combat the problems that this can cause and ensure reliable operation, the CD1243 features an integral EMI shield to protect the device against spurious noise.

 

Read all about transformers

REO UK has released a new detailed guide, which provides information about various types of transformers and their applications.

REO UK has released a new detailed guide, which provides information about various types of transformers and their applications. The transformer guide also details the theory, functions and actions of transformers and gives an overview of their history and the future. Illustrated with helpful diagrams and images throughout, this new transformer guide should prove a regular toolbox resident for all electrical engineers.

It covers all aspects of transformers including regulation, magnetic core construction, saturation, impedance matching, heat dissipation and protection.

The in-depth booklet also covers power and rating as well as losses and efficiency.

The transformer guide is one in a series of technical guides from REO UK, which are aimed to help engineers put power quality and power management equipment to better use.

"We have noted our customer's questions about transformers over a period of time.

This guide is designed to answer all these queries in such a form that everyone can follow", commented John Symonds, Director of REO UK.

Thursday, October 12, 2006

 

Electrolytic capacitors last longer

Nippon Chemi-Con GXL aluminium electrolytic capacitors are essentially a longer-life version of the company's GXE series.

Nippon Chemi-Con GXL aluminium electrolytic capacitors are essentially a longer-life version of the company's GXE series. They provide an exceptionally long service life of between 5 and 10kh (at up to 125C), making them ideal for a wide range of long-life automotive modules and other high temperature applications. The GXL series is available in rated voltages ranging from 10 to 50V DC.

Capacitance values span 100 to 4700uF, with a tolerance of +/-20%.

The new capacitors have excellent impedance and rated ripple current performance.

Can dimensions (height by diameter) are from 10 x 12.5 to 16 x 31.5mm, depending on capacitance value.

The GXL series has a very wide operating temperature range of -40 to +125C.

 

Promotion for McGrath

Link Microtek has promoted Bruce McGrath to the position of Senior Sales Engineer.

Link Microtek has promoted Bruce McGrath to the position of Senior Sales Engineer. Previously employed as Sales Engineer for the South-West, he now covers the south and south-east regions and has taken on responsibility for a number of key accounts outside his new geographical area, including major customers in the space sector. Before joining Link Microtek in 2001, McGrath worked for Diagnosys as a Product Support Engineer - a role in which he was responsible for managing all aspects of customer care relating to the diverse range of electronic equipment distributed by the company.

His early career was with the RAF, where he completed a telecommunications apprenticeship, gained a BTEC National Certificate in engineering, and spent two years at a busy satellite ground station, providing engineering support for a wide variety of equipment.

Wednesday, October 11, 2006

 

Makepeace switches hemispheres

Farnell InOne has appointed Stephen Makepeace as its new Regional Director of Western Europe.

Farnell InOne has appointed Stephen Makepeace as its new Regional Director of Western Europe. Makepeace's main responsibilities will be to lead the Farnell InOne business in the UK and Ireland. The appointment directly follows his success as Regional Director, Farnell InOne Australasia, where Farnell InOne is the market leader in Australia and has recorded impressive results in New Zealand.

Prior to joining the Premier Farnell Group in 1996, Makepeace, a chartered accountant, worked for a number of international organisations including PricewaterhouseCoopers and United Technologies Corp.

"By further combining the strengths and capabilities of the 'InOne' group of businesses, which include Farnell InOne, Buck Hickman InOne and Newark InOne, I aim to offer Farnell InOne's customers an even wider range of products and increase services tailored specifically to meet their needs", explains Makepeace.

"There is a tremendous amount of strength and energy in the Western European businesses.

It is very exciting to join at this time, and I look forward to focusing our energy into improving customer service levels still further and strengthening the platform from which we grow business".

John Hirst, Premier Farnell Group CEO, concludes: "Stephen's commitment to Farnell InOne and tremendous success in Australasia has made him an invaluable member of our team.

His move to the UK reinforces the InOne vision; working together across geographic and business boundaries to deliver the best service possible to customers.

 

Electrolytics last longer at high voltages

NRE-WB aluminium electrolytic capacitors are ideal for use in electronic ballasts for fluorescent lighting and other high-voltage applications that require high-temperature long-life performance.

Reduced case size NRE-WB aluminium electrolytic capacitors from NIC Components Europe are ideal for use in electronic ballasts for fluorescent lighting and other high voltage applications that require elevated temperature, extended load life performance. The greater efficiency of fluorescent lighting - which is able to convert approximately 25% of its energy to light versus just 5% achieved by filament lighting - coupled with an ongoing drive towards greater efficiency, has created a large and growing market for electronic lighting ballasts. NRE-WB miniature radial leaded devices have a high ripple current rating of up to 2.0A (100kHz, +105C), and are available with capacitance values from 10 to 220uF and voltage ratings of between 200 and 450V DC.

Extended load-life of up to 10,000 hours at high temperature makes NRE-WB capacitors suitable for applications where the replacement of worn components is difficult and cost prohibitive.

A wide operating temperature range of -25 to +105C enables the new capacitor series to give stable, reliable performance in applications where high temperatures are present such as fluorescent lighting or in densely packed high voltage power supplies.

Tuesday, October 10, 2006

 

Low-cost transformers run up to 500VA

AVX is offering its TLJ series of capacitors in even smaller packages, allowing for increased sound quality at miniature dimensions in smaller handheld devices.

AVX is offering its TLJ series of capacitors - known for its high capacitance versus voltage ratio - in even smaller packages, allowing for increased sound quality at miniature dimensions in smaller handheld devices. The devices will be on show for the first time at Electronica 2006 in Munich, Hall B5.173. Displaying a maximum height of 1.2mm, the parts offer a capacitance versus voltage ratio of 220uF/4V in a miniature 1210 footprint.

The devices are the first on the market to offer this degree of capacitance in a T case size.

Parts also deliver a capacitance tolerance of +/-20% and an operating temperature range between -55 and +125C.

Complying with RoHS requirements, the TLJ consumer series is ready for 3x reflow, 260C peak temperature lead-free assembly systems.

Designed for high audio performance in PDAs, mobile phones, MP3 players and digital cameras, the new capacitor should bring deep bass, low frequency performance into smaller designs.

Devices are also available in standard EIA case sizes A, B, C D and the low profile W.

 

Low-cost transformers run up to 500VA

AlfaMag Electronics has a new line of EI laminate transformers with power ranges of 50, 90, 180, 250 and 500VA, with standard input voltages at 115/230V AC, 50/60Hz.

AlfaMag Electronics has a new line of EI laminate transformers with power ranges of 50, 90, 180, 250 and 500VA, with standard input voltages at 115/230V AC, 50/60Hz, and standard dual output voltages of 5, 12, 18 and 115V (connected in parallel) and 10, 24, 36 and 230V (connected in series). An electrostatic shield between primaries and secondaries is optional. These transformers are low in cost and high in quality, constructed with a UL recognised class B insulation system.

UL recognised class F and class H insulation systems are available.

Dielectric strength is 3500V RMS minimum.

Monday, October 09, 2006

 

Ultracapacitor expansion in Munich

Maxwell Technologies will launch new Boostcap ultracapacitor products.

Maxwell Technologies will launch new Boostcap ultracapacitor products at Electronica. Maxwell's ultracapacitors provide advanced energy storage for applications in consumer and industrial electronics, automotive, transportation and telecommunications. As well as the new products, Maxwell will be showing its complete product range of ultracapacitors, running from small cells rated up to 4F up to the large MC cells at 2600F.

The company's multicell ultracapacitor modules will also be on display.

There will also be a demonstration at Maxwell's stand (Hall B6, Stand 131) of a handheld pipe-cutting tool that uses ultracapacitors for energy storage.

 

Termination chips use green substrates

Radiall has developed new 5 and 6GHz 100W aluminium nitride termination chips for ferrite isolator applications.

Radiall has developed new 5 and 6GHz 100W aluminium nitride termination chips for ferrite isolator applications. The new devices use the environmentally friendly AlN substrate for those who may have some concern with beryllium oxide. Radiall has improved the adhesion process in order to obtain improved strength between the isolator body and terminal.

The company reckons that the new devices help OEMs meet the demand of today's market trend, covering a wider range of applications within the same product, therefore simplifying the production flow and reducing inventory.

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