SERIES 722 COMMERCIAL TO-5 RELAYS DPDT MAGNETIC LATCHING SERIES RELAY TYPE DESIGNATION 722 DPDT basic relay 722D DPDT relay with internal diode for coil transient suppression DESCRIPTION The Series 722D relay has discrete silicon diodes for coil transient The magnetic-latching TO-5 relay, originally conceived and suppression. developed by Teledyne, has become one of the industry standards for low-level switching from dry circuit to 1 ampere. Designed for The Series 722 magnetic-latching relays are ideally suited for high-density PC board mounting, the 722 relay has become one of applications where coil power dissipation must be minimized. The the most versatile ultraminiature relays available because of its small relays can be operated with a short duration pulse and after the size and low coil power dissipation. contacts have transferred, no external coil power is required. The magnetic-latching feature of the Series 722 provides a memory Unique construction features and manufacturing techniques provide capability, since the relays will not reset upon removal of coil power. excellent resistance to environmental extremes and overall high reliability. By virtue of its inherently low intercontact capacitance and contact All welded construction. circuit losses, the 722 relay has proven to be an excellent Unique uni-frame design providing high magnetic efficiency and ultraminiature RF switch for frequency ranges well into the UHF mechanical rigidity. spectrum. A typical RF application for the TO-5 relay is in handheld High force/mass ratios for resistance to shock and vibration. radio transceivers, wherein the combined features of good RF Advanced cleaning techniques provide maximum assurance of performance, small size, low coil power dissipation and high reliability internal cleanliness. Precious metal alloy contact material with gold plating assures make it a preferred method of Transmitter-Receive switching (see excellent high current and dry circuit switching capabilities. Figure 1). PRINCIPLE OF OPERATION PERMANENT MAGNET MAGNETIC CIRCUIT A Energizing Coil B produces a magnetic field MAGNETIC CIRCUIT B SOFT IRON FRAME opposing the holding flux of the permanent magnet in Circuit B. As this net holding force decreases, the attractive force in the air gap COIL A COIL B of Circuit A, which also results from the flux SOFT IRON SOFT IRON of the permanent magnet, becomes great CORE B CORE A ENVIRONMENTAL AND enough to break the armature free of Core AIR GAP PHYSICAL SPECIFICATIONS SOFT IRON B, and snap it into a closed position against ARMATURE STATIONARY CONTACT Core A. The armature then remains in this Storage 65C to +125C Temperature position upon removal of power from Coil B, (Ambient) Operating 55C to +85C but will snap back into position B upon MOVING energizing Coil A. Since operation depends CONTACT Vibration upon cancellation of a magnetic field, it is 10 gs to 500 Hz (General Note 1) 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 Shock 30 gs, should not be pulsed simultaneously. Coils should not be pulsed with less than rated coil (General Note 1) 6 msec, half-sine 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 Enclosure Hermetically sealed the magnetically neutral position. Weight 0.1 oz. (2.9g) max. 2003 TELEDYNE RELAYS SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE 722 Page 96 www.teledynerelays.com 722/1203/Q1 CENTIGRID AND TO-5 CENTIGRID AND TO-5 INSERTION LOSS SERIES 722 GENERAL ELECTRICAL SPECIFICATIONS ( 25C) (Notes 2 & 3) Contact Arrangement 2 Form C (DPDT) Rated Duty Continuous Contact Resistance 0.15 ohm max. before life 0.25 ohm max. after life at 1A/28Vdc (measured 1/8 from header) Resistive: 1 Amp/28Vdc Contact Load Ratings (DC) Inductive: 200 mA/28Vdc (320 mH) (See Fig. 2 for other DC Lamp: 100 mA/28Vdc resistive voltage/current ratings) Low Level: 10 to 50 A/10 to 50mV Resistive: 250 mA/115Vac, 60 and 400 Hz (Case not grounded) Contact Load Ratings (AC) 100 mA/115Vac, 60 and 400 Hz (Case grounded) 10,000,000 cycles (typical) at low level Contact Life Ratings 1,000,000 cycles (typical) at 0.5A/28Vdc resistive 100,000 cycles min. at all other loads specified above Contact Overload Rating 2A/28Vdc Resistive (100 cycles min.) Contact Carry Rating Contact factory Coil Operating Power 290 milliwatts typical at nominal rated voltage Operate Time 2.0 ms max at nominal rated coil voltage Minimum Operate Pulse 6.0 ms width rated voltage Intercontact Capacitance 0.4 pf typical Insulation Resistance 1,000 megohms min. between mutually isolated terminals Dielectric Strength Atmospheric pressure: 350 Vrms/60Hz Negative Coil Transient 722D 2.0 Vdc Max. Diode P.I.V. 722D 60 Vdc Min. DETAILED ELECTRICAL SPECIFICATIONS ( 25C) (Note 3) BASE PART 722-5 722-6 722-9 722-12 722-18 722-26 NUMBERS 722D-5 722D-6 722D-9 722D-12 722D-18 722D-26 (See Note 6 for full P/N example) Nom. 5.0 6.0 9.0 12.0 18.0 26.5 Coil Voltage (Vdc) Max. 6.0 8.0 12.0 16.0 24.0 32.0 Coil Resistance (Ohms 20% 25C) 61 120 280 500 1130 2000 Set & Reset Voltage (Vdc, Max.) Pulse Operated 3.5 4.5 6.8 9.0 13.5 18.0 PERFORMANCE CURVES (Note 2) TYPICAL RF PERFORMANCE TYPICAL DC CONTACT RATING (RESISTIVE) 0 .1 300 .2 .3 250 .4 200 10 1.92 20 1.22 150 30 1.07 100 40 1.02 50 1.01 50 60 1.00 70 1.00 .01 0.5 .1 .5 1.0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 FREQUENCY (GHz) LOAD CURRENT (AMPS DC) FIGURE 1 FIGURE 2 722 Page 97 SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE 2003 TELEDYNE RELAYS www.teledynerelays.com 722/1203/Q1 ISOLATION ACROSS POLES RETURN LOSS (VSWR) ISOLATION ACROSS CONTACTS dB VSWR LOAD VOLTAGE (VDC)