Catalogs >
Smiths Interconnect >
Resistor Family

Resistor Family
10Pages

Catalog excerpts

Features • Lead Free, RoHS Compliant Option Available • Low Capacitance • Mounting - Surface Mount, Tab & Cover, Flange, and Rod • Power Levels: 0.05 to 800 Watts • 50 and 100 Ohms Standard • Tight Resistance Tolerance - ±5%, ±2%, and ±1% Available • Tuned Circuit • Available in AlN, BeO, or Alumina • Substrate Thicknesses of .015" to .120" Available • Rod Diameters of .020" to .375" • Custom Tab Forming Available • Resistance Ranges from 3 to 400 Ohms • Small Footprint and Low profile Applications • Base Stations • Broadcast (TV and Radio) • High Power Amplifier • Instrumentation • Military • Radar System • Satellite Communications • Splitters/Combiners • Voltage Dropping Resistor • Wilkinson Dividers For our CVD Diamond Resistors see Diamond Rf Resistives® on pages 65 to 74 Resistor Family Introduction EMC Technology offers low and high power RF resistors including surface mount chips, tab & cover chips, flange mounted and rod types. These resistors are available with Alumina, AlN, BeO and CVD substrate materials. Some devices use a tuned circuit design to minimize parasitic capacitance across their usable frequency bands. Most devices are available in a wide range of resistance values, typically from 1 ohm to 1,000 ohms. Choose from a variety of metallization finishes for easy mounting to a heat sink or directly to a printed circuit board. Typical finishes include: Lead-free, RoHS compliant plating (silver or gold), solder finish with Sn60Pb40 or solder fused finish with Sn60Pb40 depending upon package type. Select from bulk, tape & reel, or waffle packaging, again, depending upon resistor package style.

Open the catalog to page 1

Surface Mount Chip Resistor Surface mount chip resistors are available in three different terminal styles for either RF or DC applications, such as bias voltage dropping or heaters. Terminal Style A has a full backside metallization for direct attachment to a heat sink or an item to be heated. Terminal Style B has wrap-around divider for low power SMT applications. Terminal Style C has a split ground that allows it be mounted as a resistor or termination. This style provides a larger ground area for increased heat dissipation and is an excellent choice for high power SMT applications....

Open the catalog to page 2

Peak power is typically 10 times the max power rating with a 1% duty cycle and 10 microsecond pulse width. /1 Varies by resistance value within the range. Call the Sales department for more information. “*” is a place holder. See part number configurations to complete the part number. For I, B and C dimensions see data sheet on website.

Open the catalog to page 3

Tab & Cover resistors are ideal for mounting directly to a heat sink or onto a circuit board. The resistors are available with BeO, Aluminum Nitride (AlN) or Alumina substrates. These devices have standard resistance values of 50 & 100 ohms, however, are available in many non-standard values as well. The power rating ranges from 10 to 500 watts. Applications include Wilkinson divider/combiner that require low capacitance to ground. Packaging options are tray or tape & reel. All devices are available RoHS compliant. Standard Resistance For “I min” and Tw dimensions see data sheet on website....

Open the catalog to page 4

Tab & CoverProduct Information Power /I & 12 Slightly different specifications /3 & /4 Slightly different body size and lead length Peak power is typically 10 times the max power rating with a 1% duty cycle and 10 microsecond pulse width. Capacitance is parallel and measured to 2.7 GHz. “*” is a place holder. See part number configuration to complete the part number. For a complete part number, include resistance and tolerance as described above in ordering information. Please call the Sales department for specific applications.

Open the catalog to page 5

Resistor Flange resistors are excellent for mounting directly to heat sinks for improved heat dissipation. The devices are available in single, double and four hole flange mounting styles. These devices have standard resistance values of 50 & 100 ohms, however most designs are available in non-standard values as well. The flange resistors are offered in power ratings ranging from 10 to 1000 watts. Many designs are available in both BeO and Aluminum Nitride (AlN) substrates. The 31-XXXX designs, traditionally have a thin film resistorwhile the 5XXX designs, use a thick film resistor....

Open the catalog to page 6

Flange Mechanical Outlines Figure 4

Open the catalog to page 7

FlangeProduct Information Power /1 Varies by resistance value within the range. Call the Sales department for more information. /2 Formed Tabs

Open the catalog to page 8

Rod resistors are typically used in wideband high performance coaxial terminations. They feature thin film resistance elements trimmed without kerfs for stable, high frequency characteristics. The high temperature protective coating protects the film during assembly operations. In applications where one end of the rod resistor is soldered directly to the heat sink, power handling as much as 10 times its rated power may be achieved. Terminations constructed with our rod resistors, when designed properly, will yield a maximum VSWR of 1.05:1 at 4 GHz and 1.1:1 at 12 GHz. Standard resistance...

Open the catalog to page 9