7 Questions to Specify the Correct Circuit Breaker

Wednesday, July 17th, 2013

Circuit breaker selection is a multi-step process. It is a best practice for engineers to make a preliminary breaker selection early in the design phase so the device can be accounted for in the mechanical design; detailed breaker specifications will develop as the design proceeds.

Specifying the right breaker at the right point in the design process can lead to a more robust design, avoid redesigns, decrease development costs and add value to the end product.

Here are 7 questions you can ask yourself to help identify the best circuit protection solution for your design.
1. What is the AC or DC voltage requirement?

2. What is the normal operating amperage of the circuit?

3. How many poles are required?

4. What type of terminals are needed?

5. How should the device be mounted?

6. What type of actuation is preferred?

7. What approvals are needed (UL, VDE, CSA, etc.)?

Radial Multi-pin Metallized Polymer Network for DC to DC Converters

Wednesday, July 17th, 2013

The Type CS multi-pin metallized polymer network is
ideal for the low ESR/ESL requirements in DC to DC
converters and switching power supply applications.
This unique, robust, capacitor design offers high ripple
current capability and high capacitance in a small package.
It is available with straight pins on 0.10“ centers
for through-hole mounting or with gull wing leads for
surface mount assembly. Type CS (Capstick) is encapsulated
in a rugged conformal coating and is packaged
in anti-static tubes for easy handling.
♦ Rugged conformal coated case meets UL94V-0
♦ High ripple current
♦ High capacitance in a small package
♦ Non-inductive design
♦ Non-polar
♦ Surface mount or through hole assembly
♦ Multi-pin leads on 0.10“ centers

RNCS Passivated Nichrome Resistors for High Humidity Applications

Wednesday, July 17th, 2013

RALEIGH, NC (July 9, 2013)  Stackpole’s RNCS series of precision resistors has a nichrome element that is passivated to protect it from corrosion due to humidity and moisture. The result is a precision resistor that performs as well as tantalum nitride based resistors at much lower cost. The RNCS can withstand 3000 hours at 85°C / 85% RH and 10% bias as well as 100 hours at 120 degrees C / 100% RH and 2 atm. pressure with minimal resistance shift.
The RNCS is a great choice for a wide variety of precision resistor requirements for end products such as portable test equipment, portable medical devices and monitors, precision power monitoring and control, industrial and commercial motor controls, battery management, communications testing and monitoring, automotive control, and automotive audio applications.
The RNCS is available in sizes from 0402 to 2512, in resistance values ranging from 10 ohm to 1Meg ohm. This series offers tolerances down to 0.1% and TCR’s as low as 15 ppm / C for a limited value range.

Marsh Electronics is a Proud ECIA Member

Tuesday, May 28th, 2013

Marsh Electronics has been a member of ECIA for a number of years now. ECIA supports the expanding needs and interests of the global supply chain. The Association connects all facets of the electronic components industry in a way no association has in the past: manufacturers, authorized distributors and independent field sales representatives working together as a stronger voice for our entire industry.

In addition to supporting the electronic components industry, ECIA promotes careers in the industry through its involvement with the FIRST Robotics Competition. ECIA members donate parts and funding for the over 3,000 teams that participate. Check out some of the projects these students are working on! http://www.usfirst.org/

Marsh Electronics is Proud to be a New Franchised Distributor for Spacecraft Components

Wednesday, October 3rd, 2012

Founded in 1962, Spacecraft is a family-owned leading manufacturer of cylindrical connectors for the railways/transit, military, aerospace and various hard industrial environments.

Spacecraft’s core focus is manufacturing reverse bayonet connectors geared towards railway and transit applications. Our extensive engineering and manufacturing experience with reverse bayonet connectors provides us with the opportunity to offer a broad range of derivative cylindrical products in a short period of time with an assurance of exceptional quality

Hegemon Electronics Presents PLC ABS Lamp Module

Monday, August 6th, 2012

Marsh Electronics is now able to provide you with the latest PLC ABS Lamp Module from Hegemon Electronics.  This lamp module allows conformity to in-cab trailer ABS warning light requirements without having to replace existing ABS module.

The PLC ABS Lamp Module is a ruggedized alternative to replacing the ABS controller in the cab of a tractor.  When retrofitting a truck to pull a trailer, costly modifications are needed which includes purchasing and installing a new ABS module for the cab.  The PLC ABS Lamp Module eliminates the need to spend hundreds of extra dollars on expensive ABS equipment. It gets installed into the cab, is connected to the 7th pin of the 7-way trailer connector, and has a lamp output which can then be routed into an installed light bulb in the cab or the driver’s instrument panel directly.  Installation is a fraction of the time and a fraction of the cost.

KEMET Introduces New Aluminum Electrolytic Capacitors Series

Tuesday, March 13th, 2012

Greenville, South Carolina (March 6, 2012) – KEMET Corporation (NYSE: KEM), a leading manufacturer of tantalum, ceramic, aluminum, film, paper and electrolytic capacitors, today introduced its new line of surface mount and miniature radial aluminum electrolytic capacitors.

These capacitors are available in a variety of configurations, and are well-suited for common applications in the industrial, lighting, consumer and alternative energy markets. Three low-profile surface mount series are offered in voltages up to 450 VDC including low impedance models with up to 5,000 hours life at 105ºC. Seven radial-lead versions are available with up to 10,000 hours life and voltages to 500 VDC. Several of these series also offer high ripple current capability for more demanding applications.

“Our latest electrolytic portfolio fulfills the need for miniature capacitors in a wide range of applications and industries,” said Andrew Bellavia, KEMET Director of Product Marketing for Film and Electrolytic Capacitors, Americas. “KEMET’s electrolytic products now span the complete range from surface mount devices to large screw terminals. This allows designers the ability to select the capacitance solution with the right mix of characteristics to meet their specific requirements, even in the most demanding applications.”

The Perfect FIT For Any Need

Tuesday, February 7th, 2012

FIT Product Family Update

The Perfect FIT For Any Need
Alpha Wire’s industry-leading line of FIT products now can be found all in one place.
Click here to take a look at Alpha’s new and improved comprehensive FIT® brochure.  Now you can find everything you need for your heat-shrink tubing and wire management needs in one place.

Marsh Adds New Territory and Outside Sales Team

Tuesday, January 3rd, 2012

Marsh Electronics is excited to announce the addition of Bill Pugh to the Marsh Electronics Outside Sales Team. Bill will be located in Kansas City and will work on developing a new territory location for Marsh. Bill’s region will include Kansas, Nebraska and western Iowa.

Nichicon New Pencil Shaped Aluminum Capacitors

Monday, July 11th, 2011

Nichicon’s new pencil shaped aluminum capacitors are available in two series:
CS and PZ. They are designed to provide large capacitance, voltage and ripple current for low profile applications where traditional sized capacitors would be too big. A lower height is achieved by laying the capacitor on its side for mounting. Normally a power supply needs a capacitor with high voltage, capacitance and ripple current on the input side. In the case of a large power supply, usually a bulky can type capacitor is used. In the case of a small power supply, typically a radial type is used by mounting it vertically or horizontally. In recent years, the flat screen market has exploded and makers have requested a lower height capacitor to achieve a slimmer product. The usual response has been to make a bigger diameter and lower height part.

However, there was a tradeoff with voltage, capacitance and ripple current so this was not an optimum solution until the pencil capacitor was designed. With the smaller diameter, longer length and laying horizontal on the circuit board, this provided what the designers were demanding.

Key advantages to the pencil shaped capacitors:

Advantage #1: Lower Height Product
By laying the capacitor on its side, a lower height is achieved making it
attractive for low profile applications. Diameters range from 9 to 12.5mm.

Advantage #2: Larger Capacitance by Going Parallel
Multiple capacitors can be put in parallel to achieve much higher capacitances
and ripple currents but without increasing in height.

Advantage #3:  High Capacitance in Small Size
With a low height dimension, large capacitance is available up to 270

Advantage #4: Low Cost per Capacitance
When compared to other capacitors like ceramic, film and tantalum,
aluminum is the lowest cost per microfarad.

Advantage # 5: High Voltage
The pencil caps are available in voltages from 200 thru 450 Volt.

Pencil Design Features

  • Dimensions: 8×50,10×40,10×50,12.5×40, 12.5×50
  • Capacitance Range: 18 to 270 uF
  • Rated Voltage: 200 to 450 Volt
  • Temperature: 105C
  • Life: 2000-10000 Hours
  • Ripple Current: 220-1265 mArms at 105C 120 Hz