One of the most problematic elements of modern PS is secondary rectifiers with Schottky diodes, high-speed diodes, that is caused by high output voltage and current of PS. NEON-EK offers high-quality diodes from Silan Microelectronics at low prices. They can also be used in PS for powering LEDs.

Opto Diode products are now in stock and available for purchase on Digi-Key’s global websites. Products from Opto Diode Corporation will also be featured in future print and online catalogs.

“Digi-Key is very pleased to announce this new distribution agreement with Opto Diode Corporation,” said Dave Doherty, Digi-Key’s vice president of semiconductor product. “We believe this new partnership with Opto Diode affirms Digi-Key’s commitment to work with the world’s leading suppliers and provide the distribution industry’s widest selection of electronic components to our global customers.”

“Opto Diode is looking forward to the many customer benefits of teaming with an international distributor that strives to keep all parts in stock,” said Russ Dahl, general manager of Opto Diode.

» Contact Details for Digi-Key Corporation

These kits are now available for purchase on Digi-Key’s global websites and will be featured in future print and online catalogs.

Each kit covers a broad range of Littelfuse TVS diodes and contains five pieces each of select popular voltage values.

Ranging from industry standard package sizes of SMA to SMC with wattage ratings starting at 400 watts and going as high as 3000 watts, Littelfuse TVS diodes are designed to protect sensitive electronic equipment from voltage transients in applications such as telecommunications, computers, and industrial and consumer electronics. A PTM Online… On Demand® product training module that reviews overvoltage protection concepts and Littelfuse TVS diode products is available on Digi-Key‘s website.

» Contact Details for Digi-Key Corporation

TTI, Inc., the global distributor of passive, interconnect, relay & switch and discrete components, has launched new CeraDiode arrays from Epcos which are used to protect several USB ports simultaneously from static discharges, significantly reducing the PCB space and logistics costs. CeraDiodes – ceramic components developed to provide ESD protection for data, audio and video lines as well as for ICs and interfaces – are not only a cost-effective alternative to other ESD protection components such as zener and TVS diodes, but also offer technical benefits. In many cases, a semiconductor diode can be replaced by a CeraDiode on a one-to-one basis without making any changes to the pad circuit layout.

Because high data rates of up to 480Mbit/s are transmitted via the USB connection, the capacitance of the ESD protection element should be minimized in order to avoid transmission losses and signal distortions. The protection function can be realized both by single and array components, the latter being preferred for reasons of space and cost saving. The protection components must additionally satisfy the international ESD standard IEC 61000-4-2, level 4. EPCOS offers CeraDiodes as single and array components that meet these requirements precisely.

CeraDiodes are bidirectional components. As such, there is no danger of positioning them in the wrong direction. All CeraDiodes also satisfy the requirements of the international ESD standard IEC 61000-4-2 levels 1 to 4, which involves testing the components within the human body model (330Ω/150pF). The ESD protection properties of the CeraDiodes are constant up to an operating temperature of 85degC, whereas semiconductor diodes will require derating from 25degC.

Thanks to their internal electrode structure, CeraDiodes offer not only ESD protection but also have a defined capacitance, or capacitor properties. This capacitance is type-dependent and can be used for filter functions. In this way a CeraDiode can replace not only a semiconductor diode, but also a capacitor, so one component may easily replace three.

» Contact Details for TTI Inc.

Modern chipsets utilize nanometer processing technologies making them extremely susceptible to damage which necessitates the need for external protection. Silicon Protection Arrays™ (SPA) are specifically designed to protect sensitive electronic components from ESD (Electrostatic Discharge), EFT (Electrical Fast Transients), and lightning induced transients. The Littelfuse SPA devices offer the lowest dynamic resistance during an ESD or any EOS (Electrical Over Stress) event which reduces clamping voltage levels far below that of competing technologies such as MLV, MOV, and polymer. The SPA portfolio offers a wide range of devices to suit the majority of applications available in the market today such as: USB 2.0/3.0, HDMI 1.3/1.4, DVI, 10/100/1000Mbps Ethernet, eSATA, 1394a/b, LVDS, audio, analog video, keypads/pushbuttons, and LCD/camera display interfaces.

Mouser is exclusively offering the SPA Sample Kits that include ten samples each of the 39 SPA devices. Additionally, each flexible notebook includes a product selection guide and protection samples of 16 different common applications. Ultimately, the sample kit provides a cost-effective supply of various SPA devices for the convenience of design engineers.

Andy Kerr, Mouser Vice President of Passives & Circuit Protection, says the new SPA devices will solve numerous issues presented by today’s ICs that have contact discharge levels down to ±0.5kV. Kerr says, “The Littelfuse Silicon Protection Arrays are an ideal solution for new ICs facing the threat of ESD damage. In addition, the SPA kits offered by Mouser will provide a cost-effective SPA supply and documentation for many suitable applications.”

“The Littelfuse line of Silicon Protection Arrays clearly delivers superior protection for today’s demanding electronic applications.” adds Paul Dickinson, Littelfuse Vice President & General Manager of the Semiconductor Products Business. “We are proud to partner with Mouser to offer devices that will address these challenging circuit protection issues for design engineers.”

» Contact details for Mouser Electronics, Inc.

Electronic components distributor Digi-Key Corporation, recognized by design engineers as having the industry’s broadest selection of electronic components available for immediate shipment, today announced the availability of kits for a broad range of TVS Diodes offered by Littelfuse.

These kits are in stock and available for purchase on Digi-Key’s website. Additionally, they are featured in Digi-Key’s print and online catalogs.

Ranging from industry standard package sizes of SMA to SMC with wattage ratings starting at 400W and going as high as 3000W in compact surface mount packages, Littelfuse’s TVS Diodes are designed to protect sensitive computer equipment from voltage transients in such applications as telecommunications, computer, industrial, and consumer electronics. The kits from Digi-Key include five pieces each of popular voltage values.

For an overview of voltage protection concepts and Littelfuse’s TVS Diode products, a PTM Online…On Demand® product training module is available on Digi-Key’s websites.

» Contact Details for Digi-Key Corporation

Electronic components distributor Digi-Key Corporation, recognized by design engineers as having the industry’s broadest selection of electronic components available for immediate shipment, today announced that PIN, Schottky, and Varactor diodes from Skyworks Solutions, Inc. are now in stock.

Skyworks’ offering of popular PIN, Schottky, and Varactor diodes are available for purchase on Digi-Key’s global websites and will be featured in future print and online catalogs.

Skyworks’ SMP1302 PIN diode is designed for high power, high volume switch and attenuator applications from 10MHz to beyond 6GHz. They are encased in a surface mountable plastic QFN package and have a low capacitance of 0.3 picofarad (pF). The SMP1345 series of PIN diodes, available in the tiny 0402 package, is designed for Low-Noise Block (LNB), Wireless Local Area Network (WLAN), and switch applications from 10MHZ to 6GHz. The SMP1321 and SMP1340 series have very low capacitance and series resistance for fast switching, high isolation applications. The Pi configuration SMP1307-027LF is ideally suited for CATV and Infrastructure low-distortion attenuator applications.

Skyworks’ Schottky diodes are low-cost, surface mountable, plastic packaged, and are designed for RF and microwave mixers and detectors. These devices may be used at frequencies up to 10GHz and are available in SC-70, SC-79, SOD-323, SOT-23, and LGA packages. Wiring configurations include singles, common cathode, series pairs, unconnected pairs, and dual series pairs.

Skyworks’ Varactor diodes are designed for use in Voltage Controlled Oscillators (VCOs) with a low tuning voltage operation. This family of Varactor diodes includes the SMV1234, SMV1247, SMV1249 and SMV1255 series of silicon hyper-abrupt junction diodes. The SMV1413 series is ideal for use in VCOs that call for tight capacitance tolerances.

» Contact Details for Digi-Key Corporation

Mouser Electronics, Inc., known for its rapid introduction of the newest products, today announced it has signed a global distribution agreement with Comchip Technology Corporation, a leader in the design and manufacture of SMD diodes.

Mouser’s Comchip stock includes advanced technology diodes – switching, Schottky, Zener, and ESD – that are RoHS and Halogen-free in flat chip packages with gold-plated terminations instead of tin-plated. Comchip is the only manufacturer that offers RoHS and gold termination. These discrete semiconductors are used for voltage/current regulation and rectification, signal conditioning, and circuit protection. The diodes provide long-term reliability through the use of gold terminations rather than tin, eliminating their susceptibility to tin whiskers.

Mike Scott, Mouser Vice President of Active Products, stated, “Mouser is excited to be offering Comchip’s products in their differentiated “flat pack” SOD packages. These diodes are manufactured with clean, simple substrate technology, not lead-frame, to cut costs and improve reliability.”

Tony Yang, General Manager of Comchip Technology Corporation, says, “Comchip Technology is pleased to partner with Mouser Electronics and bring the latest in packaging technology to the diode marketplace. Our ‘flat pack’ SOD-323, SOD-523, SOD-723 and SOD-923 packages allow state of the art assembly of high quality diode products in a RoHS or leaded solder environment. We are a leader in providing RoHS solutions without tin whisker issues.”

» Contact details for Mouser Electronics, Inc.

Digi- Key Corporation announced today that it has expanded its line of Tyco Electronics Raychem Circuit Protection Products to include the PolyZen family of polymer-protected Zener diodes.

PolyZen devices are polymer-enhanced precision Zener diode micro-assemblies that help protect sensitive electronics from damage caused by inductive voltage spikes, voltage transients, incorrect power supplies and reverse bias. The PolyZen micro-assembly incorporates a stable Zener diode for precise voltage clamping and a resistively non-linear, polymeric positive temperature coefficient (PPTC) layer that responds to either diode heating or overcurrent events transitioning from a low to high resistance state. These devices help provide resettable protection against damage from multi-watt fault events and require only 0.7W power dissipation. In the event of sustained high-power conditions, the PPTC element of the device “trips” to limit current and generate voltage drop. This functionality helps protect the Zener and the follow-on electronics, effectively increasing the diode’s power handling capacity. Applications include portable media players, global positioning systems, hard disk drive 5V and 12V bus protection, automotive peripheral input power protection, DC power port protection, and industrial handheld POS.

“With single component placement and minimal heat sink requirements, the PolyZen devices will help our customers reduce their design costs,” said Mark Larson, Digi-Key president and COO. “Providing engineers with products that save them time and ultimately money is important, and to that end, I am very pleased to see the addition of the PolyZen devices to our product line.”

» Contact Details for Digi-Key Corporation