Resistors
1: Brazed Resistors S1: Standard Resistors1:Resistor, Q: Package Style, 300: Average Power, xxx: Resistance (Ohm)
1Q300050 (300 Watts 50 Ohm Brazed Resistor)
S1Q300100 (300 Watts 100 Ohm Standard Resistor )
Terminations
3: Brazed Terminations S3: Standard Terminations
3R300050 (300 Watts 50 Ohm Termination)
Attenuators
2Q250050 (250 Watts 5 dB brazed Attenuator)
2Q250055 (250 Watts 5.5 dB brazed Attenuator)
S2Q250200 (250 Watts 20 dB standard Attenuator)
Warranty
RFT warrants each brazed product to be free from any defect in material and workmanship for a period of two(2) years after delivery to the original purchaser. RFT liability is limited only to replacing or repairing the defective product, at our option, during the warranty period, provided:
a) RFT must be notified of such defects by the purchaser prior to the expiration of the warranty period;
b) After receiving Return Material Authorization (RMA) number from RFT;
c) The defective item is returned to RF T, with transportation charges prepaid by purchaser;
d) Upon examination of the parts by RFT, it is determined the defects were not caused by misuse, neglect, improper installation, improper storage, repair or handling.
All devices should be properly mounted in order to reduce mechanical and thermal stresses, which can degrade the MTBF of the devices. The devices must be mounted on a flat surface (. 002") in order to achieve the maximum heat transfer. (The following is a guideline outlining the proper techniques for mounting RF Techniques power component.
Flanged Parts
Flange Packages should be mounted on a flat surface (. 002") in order to achieve the maximum heat transfer. Also, avoid twisting or bending the flanges before installation. High quality silicone grease should be used sparingly on the flange of the device. The idea is to fill in the micro irregularities on the surfaces rather than creating a continuous layer of silicone grease. The best way to apply the grease is with a flat razor blade. The mounting bolts should be torqued to insure a solid contact with heat sink. Over torquing can cause the flange to bow in the middle. The devices should be mounted such that they have sufficient stress relief with the circuit board. The package should be as close as possible to the circuit board to reduce parasitic inductance caused by excessive lead length. For more information, contact one of our engineers.
Flangeless Parts
There are two basic ways of mounting un-flanged devices. One way is to solder the devices to a heat sink using tin/lead solder. This method assures a continuous ground plane and produces good thermal contact between the devices and the heat sink. This technique requires tin/lead plated heatsink (or other metal that will wet with the gold or nickel plating of the device to produce a good solder connection).
The alternate method is to clamp the device to the heatsink with some type of clamping mechanism. It is recommended that Indium foil be used rather than heatsink compound to ensure a good thermal and electrical contact. This method requires a good clamping mechanism that will work correctly.
Either of the methods described above will work for most applications. The solder technique is used by majority of customers. RFT brazed devices will be able to withstand low or high temperature soldering.
High Reliability
RFT devices are utilized in demanding environments. They are used in many military and commercial programs requiring the most stringent performance standards.
Power Dissipation
RFT devices dissipate more watts per square inch than any others on the market. RFT can supply devices with up to 500 watts power handling capability for frequency ranges from DC to 6 GHz. RFT devices can handle more RF power than a soldered device.
Power Deration
RFT devices offer a significant advantage over the competition in power handling capability due to superior power derating capability. RFT devices can be power derated to flange temperatures up to 250 degree C (see figure 1). This high temperature capability provides the user with improved system reliability and a wider margin of performance under abnormal operating conditions. RFT devices are also capable of withstanding much higher temperature for short period of time without damage.
Brazed Construction
RFT uses a high temperature brazing process ( over 800 degree C) that yields the lowest possible thermal resistance and allows for higher temperature operation. Higher temperature processing also ensures greater reliability and overall performance during thermal cycling. RFT devices are capable of withstanding a 1 1/2 to 3 lbs. pull test. The device will withstand substantial forces applied to the lead due to different rates of contraction and expansion of the lead during temperature variations. Since RFT devices are brazed, the customer need not have to worry about leads coming off during soldering operations.
Testing & Screening
100% physical & electrical screening of finished product is performed to guarantee that products comply with specification.
Quality Control
At RFT, quality is more than just a departmental function. We believe that quality is every employees responsibility. Every employee is expected to perform his/her work function to the highest possible standards. RFT is dedicated to manufacture the most reliable products available in the market. We work very hard to ensure that highest quality products are shipped everyday.
Availability
RFT stocks most of the package styles with standard values. Lead-time for non-stock item is 6-8 weeks ARO.
Custom Design
RFT’s technical staff has extensive experience in the design of high power RF/microwave amplifiers, combiners and other components used for cellular and military applications. This gives RFT a unique capability to meet customer's design requirement.
Customer Service
RFT is constantly improving customer service and quality of products to better meet customer demands.
So why are you still using the competitors parts in your high power applications?