E-SWITCH Introduces the LP37 Series Illuminated Pushbutton Switch

Sunday, May 2nd, 2010

E-Switch announces the launch of their latest illuminated pushbutton switch, the LP37 series. The LP37 series illuminated switch features a right angle, surface mount design with long travel. LED colors of red, green and yellow are available. Specifications include:

Mechanical Life: 30,000 cycles
Force: 250 +/- 100 grams
Travel: Full: 5.1 +/- 0.5mm; Switching: 2.95 mm nom; Latching: 3.3mm nom.
Contact Arrangement: SPDT
Contact Rating: 320mVDC to 50VDC; 10mA to 250mA
Contact Resistance: 50milliohms (initial max)
Insulation Resistance: 1,000Megaohms (min @ 100VDC)
Dielectric Strength: 250VAC
Operating/Storage Temperature: -30C to +85C

This new illuminated pushbutton switch works great for the telecommunications, consumer electronics, networking, low power on/off designs, performance audio and computer markets.

Stackpole Electronics’ Sulfur-Resistant Resistor Chip Provides Stability, Long-Term Reliability in Industrial Applications

Sunday, May 2nd, 2010

RALEIGH, NC (March 3, 2010) – Providing a high-power, low-cost alternative to thick film resistive technology, Stackpole Electronics’ RNCP Series thin film chip resistors insure high accuracy with a low TCR (temperature coefficient of resistance).  Offering twice the power rating compared to standard thick film technology, the RNCP Series devices feature high tolerance to harsh environments, including shock, vibration and temperature extremes. The RNCP Series does not use lead-containing glass making the part 100% lead-free with zero exceptions. Stackpole has eliminated silver from the terminations making the part impervious to sulfur while avoiding the use of expensive metals like gold. This reduces the cost of the resistor to be within 10% of a traditional standard thick film chip and significantly reduces noise and interrupted power.

Ideal for harsh environments and systems that require long-term reliability, such as industrial and off-highway applications, the rugged RNCP Series offer all of the advantages of thin film technology, including high stability, low noise and high operating temperatures.

“With the capability to withstand high temperatures and vibration, the RNCP Series meets all necessary industrial and off-highway application requirements,” said Kory Schroeder, Director of Marketing at SEI.   “In addition, the anti-sulfur material extends the operating life of this already-rugged part, which is vital for applications where long term reliability is critical.”
Featuring absolute tolerances to ±1% and a TCR of  ±100ppm/°C, the RNCP Series resistors are available in 0402, 0603, 0805 and 1206 chip sizes, with power ratings from 0.1W to 0.5W and maximum working voltages from 50V to 200V.

The RNCP Series is available on standard 7-inch reels.  Pricing varies with chip size, tolerance, and resistance value and ranges; contact Marsh Electronics for volume pricing.

Song Chuan Relays for Tyco VH or VJ Replacements

Saturday, May 1st, 2010

Looking for a replacement to Tyco VH or VJ style automotive relays, Song Chuan has your relay.  Tyco has announced that they will no longer support the VH or VJ style relays through Tyco or Bosch.  The Song Chuan 301 series and 898H series offer direct replacements for the VH and VJ series.

Marsh Electronics is Song Chuan’s largest distributor in the United States.  Let Marsh Electronics help you find a solution to your VH and VJ automotive relay requirements.

PUI Audio Announces a New Type of Speaker

Sunday, February 28th, 2010

PUI Audio announces a new type of speaker that reproduces sound, voice or music and itʼs only 1mm deep. This new multi-layered piezo speaker is available in two different types; one is frame mounted for use in open air applications and one with double-sided tape that is used for flat panel mounting.

Both types offer a frequency range of 300 ~ 20,000Hz along with the low current draw of traditional piezo devices. The small size allows them to be mounted where other devices are too thick such as touch panels displays, camera equipment or other hand held devices.


Rated Voltage: 3Vrms

Max Voltage: 10Vp-p

SPL (3Vrms @ 10cm): 75dBA min

Resonant Frequency: 1,400Hz +/- 20%

Frequency Range: 300 ~ 20,000Hz


Rated Voltage: 3Vrms

Max Voltage: 10Vp-p

SPL (3Vrms @ 10cm): 75dBA min

Resonant Frequency: 1,800Hz +/- 20%

Frequency Range: 300 ~ 20,000Hz

BI Technologies Develops Thin Film Resistor Networks in Small Outline, Leadless Packages

Monday, May 18th, 2009

Networks packaged in one of the industry’s smallest PCB footprints per lead count…

LAS VEGAS, NV (May 12, 2009) – Providing design engineers with a significant amount of PC board space savings, TT electronics BI Technologies has developed a new series of thin film resistor networks. Designated the SFN Series, the networks are housed in surface mount SON (Small Outline, No Lead) packages, and are available in custom, isolated, bussed and voltage divider circuit configurations.

 “These SFN Series networks feature one of the smallest PC board footprints per lead count in the industry. Compared to traditional 3-lead SOT23 and 8-lead SOIC packages, the networks offer a 40% and 46% size reduction, respectively,” said Mike Torres, BI Technologies’ fixed film product manager. “With the small package size and variety of configurations, the networks are ideal for a myriad of applications, including electronic measurement equipment, semiconductor processing equipment, ultrasound equipment, and flight control systems.”

The thin film resistor networks are also specified for precision analog circuits such as instrumentation amplifiers, precision voltage dividers, measurement bridges, low noise circuitry, ladder networks and converter applications.

The SFN Series SON package style is offered in a 6-pad, 2mm square outline with a pad pitch of 0.65mm, as well as an 8-pad, 4mm square outline with a pad pitch of 0.8mm. Custom circuits are available in either package style, while voltage divider circuits are offered in the 6-pad SON package. Isolated and bussed circuit configurations are offered in the 8-pad SON package.

Standard SFN Series networks are available with two, four or 7 resistors. Nominal resistance ranges from 10ohm to 100Kohm, with absolute tolerance to +/-0.25% and ratio tolerance to +/-0.05%. TCRs are to +/-25ppm/°C and TCR tracking is to +/-5ppm/°C. BI Technologies will also produce devices outside these specifications to meet specific customer requirements.

BI Technologies’ Ferrite Cube Inductor Deployed in Computer Power Applications

Monday, May 18th, 2009

High-current, low-loss power inductor operates at frequencies to 1MHz…

LAS VEGAS, NV (May 12, 2009) — Providing design engineers with a robust, cost-effective through-hole device that requires minimal board space, TT electronics BI Technologies has extended its family of high-current, low-loss power inductors.  The new HM58 Series inductor features a heavy-gauge coil wire and exhibits a saturation current rating up to 60A at frequencies to 1MHz, making it ideal for motherboard and computer power applications.

 “We’ve seen an increased demand for an inductor that delivers high-performance operating specifications but requires minimal PC board space,” said Donna Schaefer, application engineering manager for BI Technologies.  “With its through-hole configuration and three open sides, the inductor requires a footprint of only 11mm x 11.5mm. As such, we are seeing the inductor used in a number of voltage regulator applications where board space is constrained.

 The RoHS-compliant HM58 Series high current cube inductor features inductance values from 0.36mH to 1.30mH, depending on device. DCR ratings are from 0.65mohm to 1.05mohm, with tolerances to +/-5%.  Operating temperature range is from -40°C to +125°C. The inductor is available in standard tray packaging. BI Technologies will also produce devices outside these specifications to meet customer requirements.

Power Integrations Introduces an Efficiency Compliance Calculator

Wednesday, May 13th, 2009

Are you tired of having to consult multiple sources when checking the efficiency compliance of your EPS designs? If so, check out PI’s new External Power Supply Efficiency Compliance Calculator. Simply enter your data into the calculator and see if it complies with current world-wide energy efficiency regulations.

Miniature Push Button Switches now have Higher Rating

Monday, April 20th, 2009

Arcolectric’s 8200 & 8300 Miniature Push Button switch ranges now
have higher current ratings. Both ranges have been re-assessed for
ENEC approval to 12(12)A 250Vac at 105°C for 10,000 operations.
The extensive 8300 range is available with either illuminated or nonilluminated
buttons, in single or double pole with momentary or latching
switch action. There are options for various switching functions, terminal
styles – including push on, solder and PCB terminals, along with options
for actuators, body finish, colors and legend printing.
The 8200 range is sub panel mount with a choice of actuator types and
terminal styles and orientation, these include push-on, solder and PCB
Both ranges have UL & CSA approval, as well as ENEC approval to the
new higher current rating.
This higher inductive rating further extends the applications for these two
families of switches into motor switching applications where the initial
switching current can be far higher than a resistive load.

Arcolectric Miniature Push Button

Stackpole Electronic’s Explains Pulse and High Voltage Power Requirements

Thursday, April 9th, 2009

Pulse power requirements usually stem from power electronics turning on or off, or from electric motor start / stop.  The pulses are generally much longer in duration than the usual high voltage pulses and as a result, a robust resistive element technology, little or no calibration trimming, and larger resistive element mass are desirable. 

For axial leaded resistors the best choices would be the RC series of Carbon Composition resistors, the RSF/RSMF series of metal oxide resistors, and the RSPF / RSPL series of flameproof power resistors.  Carbon Comps are well known for their outstanding pulse handling capability and extremely low inductance.  The disadvantage of comps is their limited resistance tolerance, poor environmental performance and cost.  Metal Oxides provide the lowest cost solution and are the most readily available.  The RSPF / RSPL series has a more robust resistive element designed for higher power surges than metal oxides.  The RSPF/RSPL series is flameproof, while metal oxides are only flame retardant.

 Wirewound resistors such as Stackpole’s WW and CB series provide an even greater level of pulse power performance.  Because the mass of the wire used for these is significantly more than either of the film elements above, wirewounds will typically provide 5X to 10X the pulse handling of the equivalent size film resistor.  In addition, wirewounds have a great deal of flexibility in their design and construction, allowing Stackpole to create a specific resistor with the exact characteristics desired for a particular customer or application.  From a pricing standpoint, the wirewound resistor will be a bit more expensive than the equivalent film resistor, so there is a price to be paid for the superior electrical performance.  The inherent inductance of a wirewound, even those that are non-inductively wound, mean that wirewounds are not a good choice for high speed switching power supplies.

 For SMD resistors the RPC is the surge withstanding thick film chip series designed for high pulse power applications.  The use of the entire width of the ceramic for the resistive element coupled with no laser calibration allows the RPC to offer pulse handling that is from 2X to more than 10X higher than a standard thick film chip.  Coupled with the relatively low price of the RPC compared to other surge resistor solutions make it the most popular choice for many types of applications where the device will only see a pulse infrequently or at low duty cycle.  The smaller mass of the RPC resistive element prevents its use for extremely high pulse power handling or for applications with high pulse repetition rates.  For those applications the SM series of surface mount wirewound resistors is ideal.  Like the wirewounds discussed previously, the SM product has enough elemental mass to take significantly higher pulsed power and provides the ability to run at higher temperatures.  When talking about pulse applications with high repetition rates / duty cycles, this higher temperature capability is critical in maintaining the integrity of the resistor and minimizing the resistance shift due to overload.  The SM series also offers the same design and construction flexibility to enable Stackpole to design custom solutions to fit a particular application or customer requirement.  In many cases, a custom wirewound can replace solutions using several other resistor types to reduce board space usage and cost

High Voltage Pulses

High voltage pulses are typically very short in duration.  Many times the need for a high pulse voltage resistor is driven by an industry standard requirement for ESD, power line cross, or lightning withstanding.  For these requirements, the resistive element needs to be as long as possible.  Lengthening the resistive element lowers the effective voltage stress per unit length.  This concept is the basis for Stackpole’s film-type high voltage pulse solutions.

 For axial leaded resistors, the ASR / SPR series is a power film type resistor designed specifically for high voltage pulse applications.  For high voltage pulses and even repetitive pulse conditions, the ASR / SPR will outperform most other technologies.  The SPR provides a UL qualified product with values from 1 Mohm to 12 Mohm.  For even higher repetitive rate pulses, a product with a higher working voltage such as the MG series is required.  The MG series is a metal glaze resistive element with the capability to handle up to 4KV continuously.

For surface mount solutions, Stackpole offers two different products.  The RVC series is a lower cost solution for medium voltage applications while the HVC series offers the highest working voltage capability per chip size in the industry.  The RVC a screen printed serpentine resistor element that offers voltage ratings of 2 to 3 times better than the equivalent standard thick film chips.  The HVC uses a proprietary deposition method for the resistive element, which allows for finer lines, more uniform resistive traces, and the highest voltage ratings with the highest resistance values.  The HVC is capable of tolerances down to 0.5% and 25 ppm, which is the type of precision rarely seen using thick film technology.  The price for the HVC is significantly higher than the RVC.

The National Electrical Wire Processing Technology Expo

Thursday, April 2nd, 2009

Marsh Electronics will once again be exhibiting at the Wire Processing Expo May 20th and 21st.  The show will be held at the Midwest Center in downtown Milwaukee.  Stop by and visit Marsh in booth number 1603. 

The National Electrical Wire Processing Technology Expo features new products and services for electronic cable assemblies, cord sets, wiring harnesses and other products within the wire processing industry.

You will be given the opportunity to meet over 100 world-class suppliers and service companies in the wire and cable processingindustry; discover the secrets to solving your wire processing problems.