DEE Electronics » EMI/Filters

Industry’s Smallest Form Factor Silicon ESD Protection Device

admin2 — Mon, 23 May 2011 14:33:48 +0000

The 0201-sized SESD device’s miniature footprint is approximately 70% smaller than prior generation 0402-sized devices and helps provide protection and improve reliability of portable electronics such as mobile phones, MP3 players, PDAs and digital cameras. The miniature footprint offers designers flexibility in space-constrained applications. Bi-directional operation allows placement on the PCB without orientation constraint and won’t clip signals that swing below ground. Designed to withstand IEC61000-4-2 ESD test pulses, the SESD device helps protect sensitive integrated circuits (ICs). Offered in a bi-directional and ultra-low capacitance 0.6 picofarad (pF) device that is suitable for protecting very-high-speed data lines, such as USB and HDMI, or low-voltage antenna ports. The devices’ ultralow capacitance, low insertion loss (<0.5dB up to 3GHz), and high linearity of voltage vs. frequency helps minimize signal degradation. Also offered in a higher capacitance (12pF) device that can be used for low-speed generic interfaces such as keypads, power buttons, speakers, and microphone ports in portable electronics. Both devices offer 8kV contact and 15kV air discharge protection per the IEC61000-4-2 standard. For samples or more information, please send an email to MyFeedback@dee-inc.com, and be sure to include your contact information.

NEW 2370 MHz Cavity Bandpass Filter

admin2 — Sun, 23 Jan 2011 09:56:49 +0000

This is a cavity bandpass filter with a center frequency of 2370 MHz and bandwidth of 40 MHz (2350 to 2390 MHz), impedance of 50 ohms, passband insertion loss of less than 1.5 dB, passband ripple of less than 0.5 dB, and return loss greater than 14 dB. The filter can handle 20 W CW and has an operating temperature range of -40 to +55 C. It has SMA female connectors and measures 4 × 1.5 × 1.4 in. For samples or more information, please send an email to MyFeedback@Dee-inc.com, and be sure to include your contact information.

Smallest AC Power Entry Module with EMI Filter

admin2 — Sun, 23 Jan 2011 09:56:01 +0000

Filtered appliance inlet features 6A 250 VAC rating in an extremely compact package. It combines an IEC C8 appliance inlet and line filter for use in Class II information technology, medical, and entertainment appliances. This is ideally suited for downsizing appliances. The integrated EMI filter, mounted at the point of power entry, ensures optimal electromagnetic performance, while providing space savings and cost-efficient assembly. The unit is ENEC approved up to 2.5A @ 250 VAC according to IEC/EN 60320-1. It is UL and CSA approved up to 6A @ 125/250 VAC. The filter is available for standard or medical low leakage requirements, and complies with IEC/EN standards for office and medical equipment, 60950 and 60601-1 respectively. Filter ratings range from .5A – 6A. The plastic filter housing, with no potting insulation, makes it lightweight and environmentally friendly. Mounting options include screw-on or snap-in types for maximum ease of installation. Snap-in variations fit panel thicknesses 1.0 – 2.5 mm. Standard terminals are quick connect 6.3 × 0.8 mm or 4.8 × 0.8 mm. Solder terminals are available on request. For samples or more information, please send an email to MyFeedback@Dee-inc.com, and be sure to include your contact information.

Compact, 2-Stage EMC Filters for 3-Phase Systems Up to 520 VAC

admin2 — Tue, 21 Dec 2010 16:21:36 +0000

The compact, high-end filters offer cost savings and broader choices in form, fit and function. The filters protect against interference voltage from the mains, providing very high attenuation performance. Operating voltage for 3 × 277/480 and 3 × 300/520 VAC installations, and is available in currents ranging from 7A – 200A. The filter housing is designed for screw mounting. Connections for three phases and ground are made using screw clamp terminals. It combines exceptional attenuation with a low leakage rating of <1 mA. The filter series is cURus approved with ENEC approval pending. For more information, please send an email to MyFeedback@dee-inc.com, and be sure to provide your contact information.

New Space Savings Miniature Tuning Fork Crystal

admin2 — Sat, 23 Oct 2010 15:00:55 +0000

This crystal is approximately 33% smaller than previous models, measuring just 2.1mm × 1.3mm with a very low profile of 0.6mm. The miniature size of the new watch crystal makes it ideal for portable and handheld devices where space is critical. With a frequency of 32.768kHz, the new surface-mount device is optimized for a standard 12.5pF load capacitance, with an optional load capacitance of 9pF available. Frequency tolerance is ±20PPM at 25°C (77°F) and frequency stability is -0.04ppm/(change in C°)2 over the standard operating temperature of -40°C to +85°C (-40°F to 185°F). Turnover temperature range is +20°C to +30°C (68°F to 86°F), and storage temperature is -55°C to +125°C (-67°F to 257°F). Maximum equivalent series resistance of the crystal is 90k ohm, and insulation resistance is 500m ohm at 100VDC. Aging is ±3PPM per year. The termination finish is gold-over-nickel. For samples or more information, please send an email to MyFeedback@dee-inc.com, and be sure to include your contact information.

Ceramic Duplexer Spans 1732 to 2132 MHz

admin2 — Mon, 24 May 2010 14:57:56 +0000

This ceramic duplexer has a transmit center frequency of 1732.5 MHz and a receiver center frequency of 2132.5 MHz with a bandwidth in each band of +/-22 MHz. Insertion loss is less than 2 dB, ripple in the passband is less than 0.7 dB, and return loss is at least 14 dB. Rejection from 2110 to 2155 MHz and 1710 to 1750 MHz is at least 50 dB. The duplexer handles 2 W and operates over a temperature range of -20 to +70 C. For samples or more information, please send an email to EngHelpDesk@dee-inc.com, and be sure to include your contact information.

8-Way Power Divider Covers 4.9 to 5.9 GHz

admin2 — Thu, 20 May 2010 13:32:49 +0000

This power divider handles up to 10 W, and provides isolation of at least 20 dB, insertion loss of less than 1.4 dB, and VSWR of 1.4:1 or less at any port. Amplitude balance is within 0.3 dB, and phase balance is 4 deg. or less. The unit measures 6 × 2.7 × 0.7 in. and is housed in a rugged aluminum enclosure. It can be supplied with outputs that have LMR-195 cables of various lengths (16″ typical) terminated with SMA, or Type-N connectors. The standard input port connector is Type-N female. Operating temperature range is -40° to +60°^C. For samples or more information, please send an email to EngHelpDesk@dee-inc.com, and be sure to include your contact information.

Circulator for 400 to 500 MHz Applications

admin2 — Wed, 21 Apr 2010 16:29:52 +0000

This circulator operates from 400 to 500 MHz, and has isolation of at least 18 dB, insertion loss of less than 0.5 dB, and VSWR of 1.35:1 or less. The unit will handle 100 W average (500 W peak) power, has an operating temperature range of 0 to +60 C, and measures 48 × 51 × 26 mm. Connectors are SMA female at all ports. For more information, please send an email to EngHelpDesk@dee-inc.com, and be sure to include your contact information.

New Rugged Dual Directional Coupler with High Reliability

admin2 — Fri, 18 Dec 2009 17:24:08 +0000

This rugged 50-dB dual-directional coupler operates from 380 to 870 MHz. It is an excellent choice for applications such as antenna power monitoring in base stations. It accepts an RF input power of 500 W average and 5 kW peak. Isolation is typically 25 dB, insertion loss is 0.05 dB, VSWR is less than 1.15:1 at input and output ports, and third-order intermodulation distortion is 155 dBc. Connectors are Type-N female for the mainline input and output, and SMA female for the forward and reverse coupled ports. All are RoHS compliant. For samples or more information, please send an email to EngHelpDesk@dee-inc.com. Dee can support all of your coupler requirements.

Efficient and Economical New Three-Phase Line Filters

admin2 — Tue, 06 Oct 2009 21:33:52 +0000

This new series of 3-phase line filters are designed to solve EMC problems efficiently and cost effectively. The filters are produced without potting compound, making them less costly and lighter weight than conventional filters. This series of filters are built to be used with 480 VAC installations and are available in single or two stage versions. The single stage filter is available from 16 – 150A. The two stage filter possesses a broader attenuation band with a leakage current of just 5 mA, making it ideal for use in installations equipped with residual current circuit breakers. They can be mounted lengthwise or upright, providing additional flexibility in design. Among various applications, the single and the two-stage filters are suited for drive systems such as material handling and conveyors, electrical or renewable energy equipment installations, uninterruptible power systems (UPS) for telecommunication, computer and data center systems, as well as medical equipment. The series has ENEC approvals. Approvals to cURus have been applied for. All versions are available from stock for small quantities of 1-5 and larger quantities have a lead time of 8-10 weeks. They are packaged as single units. For samples or more information, please send an email to EngHelpDesk@dee-inc.com. Dee can support all of your EMC needs.