PO Box 41
0870 900 6096
0870 900 6096
PO Box 41
0870 900 6096
0870 900 6096
Ohmite Manufacturing announces the new 5W and 7W surface mount wirewound resistors for high power density applications. The new RW5 and RW7 Series SMD wirewound resistors feature a 'finned' body style in order to maximize surface area, and therefore cooling capacity, without taking up excessive PCB space.
A new range of high energy resistors from Ohmite combine the benefits of non-inductive performance and high power density. Resistant to power surges such as lightning strikes, the first in the series, the TP810, would commonly be used to buffer the energy required to switch on and turn off components like large compressors and motors or spikes caused by faulty wiring or problems with the utility such as downed power lines.
By using very simple idea from their heatsink designs, Ohmite has developed an SMD wirewound resistor which meets a 5W plus power rating, providing a solution to a problem which has dogged resistor manufacturers for years.
Having achieved success in the medical equipment market with custom made parts which have applications in personal fibre optic theatre lighting used by surgeons, Ohmite have introduced two new miniature heatsink parts, the SV-LED-314E (14mm height) and the SV-LED-325E (25mm height) to address other opportunities where component size is a major consideration.
Ohmite has today revealed the expansion its D Series of surface mount device heat sinks with two new extrusion forms. Designed to better facilitate pick-and-place equipment, these new forms provide increased options and flexibility.
Ohmite's new IS Series of heatsinkable, thick film, planar power resistors meet the requirements of designers seeking a compact, low profile solution to demanding applications such as dynamic motor braking.
Ohmite has added two new extrusion forms to their popular DA/DV line of SMD heatsinks to provide customers with even more flexibility. Now offered in three extrusion forms and two surface finishes, this product family is designed to provide cooling for TO-252, TO-263, and TO-268 devices.
Ohmite have announced that it has expanded its D Series of surface mount device heat sinks with two new extrusion forms. Designed to better facilitate pick-and-place equipment, these new forms provide increased options and flexibility.
Ohmite Manufacturing announces that it will showcase its newest products at Electronica 2012, in Munich Germany. They show is taking place from November 13-16, and Ohmite will be in Hall B6, Booth #334. Products on display include Ohmite's D Series of heat sinks, FC4L Series of resistors, and CP4 Series of cold plate four-pass heat sinks.
Ohmite has today announced the introduction of the CP4 Series of cold plate four-pass heatsinks. These liquid coldplates are designed for Ohmite heatsinkable type resistors, including the TAP600, TAP800, TA1K0, TA2K0, and various SOT-227 resistor packages. They can also be used to provide maximum cooling for SCRs, rectifiers, diodes, thyristors, and other high-power semiconductor devices.
Ohmite has today revealed that it has expanded its FC4L Series of four terminal current sense resistors. This series, previously available in five watt package sizes, is now also available in two watt package sizes.
Ohmite Manufacturing is pleased to announce its 2011 global winners in distribution excellence. Presented at the recent EDS event in Las Vegas, NV, these awards honor Ohmite's top-performing distributors. The 2011 Chairman's Award, Ohmite's highest sales honor for its authorized distribution channel, has been awarded to TTI, Inc. and Allied Electronics, both headquartered in Fort Worth, TX.
Combining high thermal performance, labour-saving attachment mechanisms and adaptability, the new C Series range of heatsinks from Ohmite has been extended to include a version for TO-126 devices. Camming clips which eliminate the need for mounting holes and screws, are resilient and provide the same amount of force after repeated use.
Resistor manufacturer Ohmite, has announced that its corporate parent, Heico Company LLC, has acquired Wakefield Solutions, a designer and manufacturer of thermal management solutions and aluminum extrusions. Much of Ohmite's recent product range extension has involved a series of innovative heatsinks which uses clips instead of screws to improve thermal management and component placement.
By adding a cam-clip and eliminating the need for a screw hole, the rear side of Ohmite's new R Series heatsink benefits from being fully populated with extra fins which provide a larger cooling surface area and a significant improvement in thermal performance while using less space.
Available in sizes to fit design requirements, the new C Series of heatsinks from Ohmite combines excellent thermal performance with a component attachment mechanism which will save time and money in the event of an upgrade or a simple replacement.
Available with voltage ratings up to 3kV and resistance values from 100k up to 100Gohms, the new Ohmite HVC Series of wrap around terminal chip resistors have a standard TCR of 100ppm and standard tolerances of 5%, although tolerances as low as 0.50% can be achieved. Voltage coefficients range from as low as 10 and up to 100 depending on resistance value.
Designed for applications requiring high power densities and where forced air cooling is present, Ohmite has released a larger version of their MV/MA 102 heatsink which, due to longer and more efficient fin extrusions, give nearly twice the thermal performance. The new device has a surface area of 49,218²mm and a thermal resistance of 3.6°c/w.
Following increased demand from battery manufacturers, and companies involved in the development of green power solutions Ohmite have responded by launching their SH shunt resistor.
A 5 watt version of its already popular FCSL metal foil current sense resistor range has been launched by Ohmite. The use of foil construction gives the FCSL the effective combination of very low and stable TCRs. It is available in a wide selection of very low ohmic values.
Capable of retaining up to four TO-264 or TO-267 resistors or semiconductors in a single heatsink, Ohmite's new patented M Series is secured by circuit board mounting and the devices are held in place by a clever ASTM A228 spring clip, making mounting holes and fasteners unnecessary.
Intent on capitalizing on the success of their W Series heatsinks which utilize a clever attachment scheme while remaining competitively priced, Ohmite have introduced black anodized versions which when used in still air, will give customers as much as a 30% increase in thermal performance.
The development of a new heatsink which aids low thermal resistance has enabled Ohmite to push the power ratings of their TO-247 resistors to new levels, resulting in the new TEH100 which is rated at 100W at a 25°C case temperature.
Aware that thermal management is an important part of environmental care, and that anything which doesn't require the use of electricity in order to maintain acceptable temperatures, is likely to be welcomed by design engineers, Ohmite has launched the first of a range of heatsinks which not only meet these requirements, but also save time and money.
Designed specifically with high current applications in mind, Ohmite's new wirewound tubular lug resistor range, the E Series, is available with three durable coating options; lead-free vitreous enamel, silicone-ceramic and the patented, flameproof Centohm cement which is designed to withstand temperatures as high as 2000°C.
Expanding its metal foil/metal element construction into higher power levels, Ohmite has combined the internal technology of their new FCSL Series with the TO-220 packaging of their TBH Series to achieve handling in excess of 25A. This creates a resistor which is designed for a variety of applications requiring intermediate heatsinkable power at an economical price.
Using metal resistive elements made from Nickel-Chromium or Cupron (Manganin-Copper) the new MCS Series of SMD flip chip resistors from Ohmite have a very low TCR of <50ppm/°C over the range of current sense values which are popular in portable, battery operated equipment and power supplies.
By introducing new, high temperature materials in the manufacture of their resistors, Ohmite is able to supply a new 4 watt resistor in what is close to a 3 watt package size. The resistor manufacturer argues that since most design engineers derate their components by as much as 50% to increase circuit reliability, the new 14AFR will allow for a smaller package size than existing products.
Ohmite has launched its first Metal Foil resistor series designed to meet the demands, among other applications, of manufacturers of battery powered devices who are looking for tight tolerances for the accurate measurement of current draw and a low TCR so that the resistor value will not drift too much as temperatures increase.
Ideal for many current monitoring and precision control applications, Ohmite's new TGHG Series SOT-227 type resistors are available in resistance values as low as 0.0005 ohms. The non inductive, thick film power resistors, when used with the appropriate heatsink, are equally suited to high power current monitoring up to100W. Providing highly reliable, non inductive performance the TGHG features a four terminal Kelvin connection to isolate measurement path from current flow path.
A new method of heatsinking has been developed by Ohmite which is proving popular with design engineers because it solves the problem creating a gap if the screw is overtightened when installing conventional TO-220 resistors and creates optimal thermal transfer between the resistor (or semiconductor) and the heatsink.
US resistor manufacturer has established a blog to enable engineers and designers to talk to each other and discuss design ideas or problems.
Ohmite's new G Series capacitor discharge and symmetry resistor range has been specially designed to handle the requirements of repetitive pulse loading, the G Series provides high power dissipation up to 13W at 25°C.
Ohmite has produced what it claims to be the industry's first thin film power resistor in heatsinkable packaging. The TK/TN Series also offers other major advantages over existing TO-220 products, namely, low resistance values down to 0.03 ohms for current sense applications and low cost.
Bringing precision high voltage capabilities to the benefits of surface mount, Ohmite's new MacroChip resistors have a non-inductive design combined with a low voltage coefficient.
Ideally suited for high frequency and pulse load applications Ohmite's new TGH Series non-inductive thick film power resistor is available in 120 or 200 Watt, 2 or 4 terminal versions.
The latest from Ohmite's product range to use its innovative thick film technology is the TFH85, a heat sinkable resistor which provides a robust 85W power rating (at 25°C case temperature) in a compact TO-264 package.
The newly extended TFS Series of resistors from Ohmite has been specifically designed and developed to absorb much more energy compared to standard film resistors. Ideal for medical surge protection applications, these low profile, thick film resistors offer non-inductive performance in an axial package.
The new 610 and 650 Series four terminal bare element resistors from Ohmite provide ultra low resistance values (to 0.005 ohms) for relatively high current requirements.
Designed to meet the exacting requirements of military specification MIL-R-93, the new P Series moulded precision wirewound resistors from Ohmite offers high stability and low temperature coefficient of resistance (TCR).
With ratings from 90-330 watts, the new range of WFH flat, heatsinkable, wirewound resistors from Ohmite offer cost savings, weight and space savings, plus superior thermal efficiencies over conventional aluminum housed resistors.
The new WH/WN/WL series miniature moulded axial leaded wirewound resistors from Ohmite uses the high purity (96% Alumina) ceramic cores with wire winding which are spot welded by CNC machine tools to ensure total operational consistency throughout.
Specifically designed and developed to absorb more energy than standard film resistors, the new TFS Series from Ohmite is said to be ideal for medical surge protection applications and for the replacement of standard carbon composition resistors.
The new HVC series high voltage chip resistors from Ohmite offer high voltage capability in a surface mount package. Meeting MIL-STD-202 specification, the HVC series uses the latest thick film technology to meet voltage applications of up to 3kV.
Bridging the gap between low power, high resistance potentiometers and high power, lower resistance wirewound rheostats, Ohmite's new PE Series thick film potentiometers have a metal shaft and ceramic housing to provide a smooth linear operation and low noise performance.