RF120-9

TELEDYNE RELAYS AEROSPACE CENTIGRID® MAGNETIC-LATCHING R.F. RELAYS DPDT SERIES RF120 DESCRIPTION The RF120 Series relay is an ultraminiature, hermetically sealed, magnetic-latching relay featuring extremely low intercontact capacitance for exceptional R.F. performance over the full UHF spectrum. Its low profile height and .100” grid spaced terminals (precluding the need for spreader pads) make it ideal for applications where extreme packaging density and/or close PC board spacing are required. The basic design and internal structure are similar to the TO-5 421 Series relay. The relay is capable of meeting Teledyne Relays’ T2R® requirements. The RF120 design has been optimized for use in RF attenuators, RF switch matrices, and other applications requiring high isolation, low insertion loss, and low VSWR. Unique construction features and manufacturing techniques provide overall high reliability and excellent resistance to environmental extremes. • All welded construction. • Unique uni-frame design providing high magnetic efficiency and mechanical rigidity. • High force/mass ratios for resistance to shock and vibration. • Advanced cleaning techniques provide maximum assurance of internal cleanliness. • Gold plated precious metal alloy contacts ensure reliable d.c. switching from dry-circuit to 1/4 amp, as well as low, stable insertion loss. The RF120 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 RF120 Series provides a “memory” capability, since the relays will not reset upon removal of coil power. PRINCIPLE OF OPERATION Energizing Coil B produces a magnetic field opposing the holding flux of the perMAGNETIC CIRCUIT A PERMANENT MAGNET SOFT IRON CORE A manent magnet in Circuit B. As this net MAGNETIC CIRCUIT B SOFT IRON FRAME holding force decreases, the attractive force in the air gap of Circuit A, which COIL A COIL B also results from the flux of the permanent magnet, becomes great enough to break the armature free of Core B, and AIR GAP STATIONARY SOFT IRON snap it into a closed position against Core ARMATURE CONTACT A. The armature then remains in this position upon removal of power from MOVING Coil B, but will snap back into position B CONTACT 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 followed, it is possible for the relay to be in the magnetically neutral position. ENVIRONMENTAL AND PHYSICAL SPECIFICATIONS Temperature (Ambient) Vibration -65°C to + 125°C 30 g’s to 3000 Hz (Note 3) 100 g’s for 6 msec. (Note 3) half-sine Shock Acceleration 50 g’s (Note 3) Enclosure All welded, hermetically sealed 0.10 oz. (2.84 gms.) max. Weight 54 SERIES RF120 GENERAL ELECTRICAL SPECIFICATIONS Contact Arrangement Rated Duty Contact Resistance Contact Load Rating (DC) Contact Life Ratings Contact Overload Rating Contact Carry Rating Coil Operating Power Operate Time Contact Bounce Minimum Operate Pulse lntercontact Capacitance Insulation Resistance Dielectric Strength (-65°C to +125°C unless otherwise noted) (Notes 1 & 2) 2 Form C (DPDT) Continuous 0.125 ohm max. before life; 0.225 ohm max. after life at 0.25A/28VDC, (measured 1/8” from header) Resistive: Low Level: 0.25 Amp/28VDC 10 to 50 µA/10 to 50 mV 10,000,000 cycles (typical) at low level 00,100,000 cycles min. at 0.25 Amp/28VDC 0.5A/28VDC Resistive (100 cycles min.) Contact factory 290 milliwatts typical at nominal rated voltage @ 25°C 1.5 msec max. at nominal rated coil voltage 2.0 msec max. 4.5 msec @ nominal voltage 0.02 pf typical 10,000 megohms min. between mutually isolated terminals Atmospheric pressure: 500 VRMS/60 Hz 70,000 ft.: 125 VRMS/60Hz DETAILED ELECTRICAL SPECIFICATIONS (-65°C to +125°C unless otherwise noted) (Note 2) BASE PART NUMBERS (Note 5) Coil Voltage (VDC) Nom. Max. Coil Resistance (Ohms ± 10% @ 25°C) Set & Reset Voltage (VDC, Max.) ± RF120-5 RF120-6 RF120-9 RF120-12 RF120-18 RF120-26 5.0 6.0 61 3.5 6.0 8.0 120 4.5 9.0 12.0 280 6.8 12.0 16.0 500 9.0 18.0 24.0 1130 13.5 26.5 32.0 2000 18.0 TYPICAL R.F. PERFORMANCE (NOTE 1) OUTLINE DIMENSIONS .335 MAX. (8.51) .435 MAX. (11.05) 0 .1 .2 .3 .4 dB INSERTI ON LO SS .295 MAX. (7.49) .75 MIN. (19.05) 0.17 + .002 – .001 .375 MAX. (9.53) (.031 ± .003) (0.79 ± 0.08) 10 20 30 40 50 60 70 .01 0.5 .1 FREQUENCY (GHz) 1.92 VSWR DIA. (0.43) + (0.051) – (0.025) 10 LEADS 9 N LO RETUR SS (VSW R) CTS 1.22 1.07 1.02 1.01 1.00 1.00 4.0 .035 ± .010 (0.89 ± 0.25) 10 ROS N AC POLES ACROSS ATIO ISOL ATION ISOL NTA S CO 1 2 3 4 COIL B .475 MAX. (12.07) COIL A .100 TYP. (2.54) 8 7 6 5 .5 1.0 .200 (5.08) SCHEMATIC (TERMINAL VIEW) (NOTE 4) DIMENSIONS ARE SHOWN IN INCHES (MILLIMETERS) NOTES: 1. 2. 3. 4. 5. Characteristics shown as “typical” are based on available data and are best estimates. No on-going verification tests are performed. Unless otherwise specified, parameters are initial values. Relays will exhibit no contact chatter in excess of 10 µsec or transfer in excess of 1 µsec. Contacts shown in position resulting when Coil A last energized. Screened hi rel versions available on special order. Contact factory. 55 ©1996 TELEDYNE RELAYS 12525 Daphne Avenue Hawthorne, California 90250