TELEDYNE RELAYS COMMERCIAL CENTIGRID® MAGNETIC LATCHING R.F. RELAYS SERIES RF170 DPDT DESCRIPTION • 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 RF170 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. In addition, the RF170 design has been optimized for use in RF attenuators, RF switch matrices, and other applications requiring high isolation, low insertion loss, and low VSWR. The RF170 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. Unique construction features and manufacturing techniques provide overall high reliability and excellent resistance to environmental extremes. The magnetic-latching feature of the RF170 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 MAGNETIC CIRCUIT A PERMANENT MAGNET SOFT IRON CORE A permanent magnet in Circuit B. As this MAGNETIC CIRCUIT B SOFT IRON FRAME net holding force decreases, the attractive force in the air gap of Circuit A, COIL A COIL B which also results from the flux of the permanent magnet, becomes great enough to break the armature free of AIR GAP Core B, and snap it into a closed position STATIONARY SOFT IRON CONTACT ARMATURE against Core A. The armature then remains in this position upon removal of power from Coil B, but will snap back MOVING CONTACT into 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 followed, it is possible for the relay to be in the magnetic neutral position. 87 ENVIRONMENTAL AND PHYSICAL SPECIFICATIONS Temperature (Ambient) -55°C to + 85°C Vibration 10 g’s to 1000 Hz (Note 3) Shock 30 g’s for 6 msec. (Note 3) Enclosure Hermetically sealed Weight 0.10 oz (2.9 gms.) max. SERIES RF170 GENERAL ELECTRICAL SPECIFICATIONS (@ 25°C) (Notes 1 & 2) Contact Arrangement 2 Form C (DPDT) Rated Duty Continuous Contact Resistance 0.15 ohm max. before life; 0.25 ohm max. after life at 0.25A/28VDC, (measured 1/8” from header) Contact Load Rating (DC) Resistive: Low Level: Contact Life Ratings 10,000,000 cycles (typical) at low level 00,100,000 cycles min. at all other loads specified above Contact Overload Rating 0.5A/28VDC Resistive (100 cycles min.) Contact Carry Rating Contact factory Coil Operating Power 290 milliwatts typical at nominal rated voltage @ 25°C Operate Time 2.0 msec max. at nominal rated coil voltage Minimum Operate Pulse 6.0 msec max. at nominal voltage lntercontact Capacitance 0.02 pf typical Insulation Resistance 1,000 megohms min. between mutually isolated terminals Dielectric Strength Atmospheric pressure: 350 VRMS/60 Hz DETAILED ELECTRICAL SPECIFICATIONS (@ 25°C) (Note 2) BASE PART NUMBERS Coil Voltage (VDC) 0.25 Amp/28VDC 10 to 50 µA/10 to 50 mV ➧ RF170-5 RF170-6 RF170-9 RF170-12 RF170-18 5.0 6.0 9.0 12.0 18.0 Nom. Max. RF170-26 26.5 6.0 8.0 12.0 16.0 24.0 32.0 Coil Resistance (Ohms ± 20%) 61 120 280 500 1130 2000 Set & Reset Voltage (VDC, Max.) 3.5 4.5 6.8 9.0 13.5 18.0 TYPICAL R.F. PERFORMANCE (NOTE 1) OUTLINE DIMENSIONS .335 MAX. (8.51) .435 MAX. (11.05) 0 INSERTIO .1 .300 MAX. (7.62) N LOSS .2 .3 .75 MIN. (19.05) 20 RETUR 40 S TACT CON OSS ACR N POLES ATIO A C R O SS ISOL ATION ISOL 50 60 0.5 .1 .5 (0.43) + (0.051) – (0.025) 10 LEADS 1.07 70 .01 DIA. 1.22 R) S (VSW N LOS 30 1.0 1.02 1.01 .375 MAX. (9.53) (.031 ± .003) (0.79 ± 0.08) 0.17 + .002 – .001 1.92 10 VSWR dB .4 10 9 .100 TYP. (2.54) 1.00 1.00 4.0 FREQUENCY (GHz) .035 ± .010 (0.89 ± 0.25) 1 COIL B 2 8 7 3 6 4 .475 MAX. (12.06) COIL A 5 PIN NUMBERS FOR REF. ONLY .200 (5.08) SCHEMATIC (TERMINAL VIEW) (NOTE 4) DIMENSIONS ARE SHOWN IN INCHES (MILLIMETERS) NOTES: 1. 2. 3. 4. 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. ©1996 TELEDYNE RELAYS 88 12525 Daphne Avenue Hawthorne, California 90250