series rf341 description the rf341 series relay is an ultraminiature, hermetically sealed, magnetic latching relay featuring extremely low intercontact capacitance for exceptional rf performance well into the c band. its low profile and small size make it ideal for for applications where extreme packaging density and/or close pc board spacing are required. due to its minimal mass, many relays may be used to configure replacements for bulkier switching solutions at a substantial savings in weight the basic operating mechanism is similar to the to-5 422 series relay. in addition, the rf341 design has been optimized by increasing the distance between the set/reset contacts. this design improvement make these unique relays the perfect choice for use in rf attenuators, rf switching matrices and other rf applications requiring high isolation, low insertion loss and low vswr. the following unique construction features and manufacturing techniques provide overall high reliability and excellent resistance to environmental extremes: ? minimum mass components and welded construction provide maximum resistance to shock and vibration. ? uni-frame motor design provides high magnetic efficiency and mechanical rigidity. ? advanced cleaning techniques provide maximum assurance of internal cleanliness. ? gold plated precious metal contacts ensure reliable, low level switching. the rf341 relay is ideally suited for applications where power dissipation must be minimized. the relays can be operated with a short duration pulse. after the contacts have transferred, no external holding power is required. the magnetic latching feature of the rf341 series provides a non volatile memory capability since the relays will not reset upon removal of coil power. environmental and physical specifications temperature ( ambient ) vibration shock enclosure weight -55 c to +85 c 30g to 2,000 hz (note 1) 75g for 6 ms hermetically sealed 0.09 oz. (2.52 gm) max. teledyne relays ultraminiature magnetic latching to-5 relays spdt (note 1) principle of operation energizing coil b produces a magnetic field opposing the holding circuit b. as this net holding force decreases, the attractive force in the air gap of circuit a, which also results from the flux of the permanent magnet, becomes great enough to break the armature free of core b and snap it in position against core a. the armature then remains in this position upon removal of power from coil b, but will snap back to position b upon energizing coil a. since operation depends upon cancellation of a magnetic field, it is necessary to apply the correct polarity to the relay coils as indicated on the relay schematic. when latching relays are installed in equipment, the latch and reset coils should not be pulsed simultaneously. coils should not be pulsed with less than the nominal coil voltage and the pulse width should be a minimum of three times the specified operate time of the relay. if these conditions are not observed, it is possible for the relay to be in a magnetically neutral position. should this happen however, pulsing one coil or the other, as prescribed, will bring the relay back into proper operating condition. acceleration 50g dc to c band soft iron frame soft iron core a magnetic circuit a magnetic circuit b permanent magnet stationary contact moving soft iron armature contact coil a coil b new
typical rf characteristics rf notes: 1. data represents an average between the typical reading of pins 8 and 6 (closed, coil a last energized) and pins 8 and 1 (closed, coil b last energized) 2. data represents an average between the typical reading of pins 8 and 6 (open, coil b last energized) and pins 8 and 1 (open, coil a last energized) 3. test conditions: a. fixture: .031 copper clad, reinforced ptfe, rt/duroid ? 6002 with sma connectors. (rt/duroid ? is a registered trademark of rogers corporation). b. relay header is in contact with but not soldered to ground plane nor connected to ground via ground pin. c . test performed at room ambient temperature. d. terminals not tested were terminated with 50 ohm load. e. contact signal level: 20 dbm. 4. data presented herein represents typical characteristics and is not intended for use as specification limits. 0 500 1,000 1,500 2,000 2,500 3,000 3,500 4,000 4,500 5,000 5,500 6,000 frequency (mhz) 0 500 1,000 1,500 2,000 2,500 3,000 3,500 4,000 4,500 5,000 5,500 6,000 frequency (mhz) insertion loss (rf note 1) -0.00 -0.25 -0.50 -0.75 -1.00 -1.25 -1.50 -1.75 -2.00 -2.25 -2.50 0 -5 -10 -15 -20 -25 -30 -35 -40 -45 -50 -55 -60 -65 -70 isolation (rf note 2) insertion loss in db isolation in db 0 500 1,000 1,500 2,000 2,500 3,000 3,500 4,000 4,500 5,000 5,500 6,000 frequency (mhz) 1.50 1.45 1.40 1.35 1.30 1.25 1.20 1.15 1.10 1.05 1.00 vswr
series rf341 general electrical specific ations (@ 25 c) (notes 2 & 3) detailed electrical specification (@ 25 c) (note 2) contact arrangement 1 form c (spdt) rated duty continuous contact resistance .15 ohms max. initial. after life, .25 ohms (measured 1/8 from the header) contact load rating (dc) low level: 10 to 50 a 10 to 50 mv contact life rating 10,000,000 cycles (typical) at low level coil operating power (@nominal rated voltage) 5 volt 410mw 12 volt 288mw 26.5 volt 351mw operate time 2.0 ms. max. at nominal rated coil voltage minimum operate pulse 6.0 ms. max. at nominal voltage intercontact capacitance 0.4 pf typical insulation resistance 10,000 m w min. between mutually isolated terminals dielectric strength 350 vrms/60 hz @ atmospheric pressure base part number rf341-5 RF341-12 rf341-26 coil voltage (vdc) nom. 5.0 12.0 26.5 max. 6.0 16.0 32.0 coil resistance (ohms 20%) 61 500 2,000 set & reset voltage (vdc max) 3.5 9.0 18.0 teledyne relays ? 1998 12525 daphne ave. hawthorne ca 90250 (213) 777-0077 notes 1. relays will exhibit no contact chatter in excess of 10 s or transfer in excess of 1 s. 2. unless otherwise specified, parameters are intial values. 3. characteristics shown as typical are based on available data and are best estimates. no on going verification tests are pe rformed. 4. pin positions 5 and 10 are recesses in the header for ground pin options (ground pins not shown). 5.to order ground pin options add y (pin 5 position) or z(pin 10 position) to the part base part number. ex. rf341y-5 6. contact teledyne relays for hi-rel screening/program options. outline dimensions and schematic diagram http:www//teledynerelays.com .017 +.002 -.001 ( ) .43 +.05 -.03 .335 (8.51) dia. max. .370 (9.40) dia. max. .280 (7.11) max. .75 (19.05) min. coil b coil a terminal location, pin numbering and schematic are viewed from the terminals schematic is shown with coil a last energized 36 3 typ .035 (.89) .010 (.25) .031 (.79) .003 (.08) .200 (5.08) .010 (.25) + + _ _ 1 2 4 6 7 8 9 dia. 10 5 external dimensions terminal numbering schematic
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