?003 teledyne relays specifications are subject to change without notice 722 page 96 www.teledynerelays.com 722/1203/q1 centigrid ? and to-5 series 722 commercial to-5 relays dpdt magnetic latching description the magnetic-latching to-5 relay, originally conceived and de veloped by teledyne, has become one of the industry standards for low-level switching from dry circuit to 1 ampere. designed for high-density pc board mounting, the 7 22 relay has become one of the most versatile ultraminiature relays available because of its small size and low coil power dissipation. unique construction features and manufacturing techniques provide excellent resistance to environmental extremes and overall high reliability. ? 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. ? precious metal alloy contact material with gold plating assures excellent high current and dry circuit switching capabilities. the series 722d relay has discrete silicon diodes for coil transient suppression. the series 722 magnetic-latching relays are ideally suited for applications where coil power dissipation must be minimized. the relays can be operated with a short duration pulse and after the contacts have transferred, no external coil power is required. the magnetic-latching feature of the series 722 provides a emory capability, since the relays will not reset upon removal of coil power. by virtue of its inherently low intercontact capacitance and contact circuit losses, the 722 relay has proven to be an excellent ultraminiature rf switch for frequency ranges well into the uhf spectrum. a typical rf application for the to-5 relay is in handheld radio transceivers, wherein the combined features of good rf performance, small size, low coil power dissipation and high reliability make it a preferred method of transmitter-receive switching (see figure 1). principle of operation energizing coil b produces a magnetic field opposing the holding flux of the per manent magnet in 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 into a closed position against core a. the armature then remains in this position upon removal of power from coil b, but will snap back 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 rated 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. series designation relay type 722 dpdt basic relay 722d dpdt relay with internal diode for coil transient suppression soft iron armature soft iron core b coil b magnetic circuit b permanent magnet magnetic circuit a soft iron frame coil a soft iron core a air gap stationary contact moving contact environmental and physical specifications temperature (ambient) storage C5? to +125 operating C5? to +85 vibration (general note 1) 10 gs to 500 hz shock (general note 1) 30 gs, 6 msec, half-sine enclosure hermetically sealed weight 0.1 oz. (2.9g) max.
722 page 97 specifications are subject to change without notice ?003 teledyne relays www.teledynerelays.com 722/1203/q1 centigrid ? and to-5 0 .1 .2 .3 .4 10 20 30 40 50 60 70 .01 0.5 .1 .5 1.0 frequency (ghz) figure 1 typical rf performance 1.92 1.22 1.07 1.02 1.01 1.00 1.00 vswr 300 250 200 150 100 50 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 load current (amps dc) figure 2 typical dc cont act rating (resistive) load vol tag e (vdc) db return loss (vswr) insertion loss isolation across co nta cts isolation a cross p oles series 722 general electrical specifications (@25) (notes 2 & 3) detailed electrical specifications (@25) (note 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) contact load ratings (dc) (see fig. 2 for other dc resistiv e voltage/current ratings) resistive: 1 amp/28vdc inductive: 200 ma/28vdc (320 mh) lamp: 100 ma/28vdc low level: 10 to 50 ?/10 to 50mv contact load ratings (ac) resistive: 250 ma/115vac, 60 and 400 hz (case not grounded) 100 ma/115vac, 60 and 400 hz (case grounded) contact life ratings 10,000,000 cycles (typical) at low level 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. performance curves (note 2) base part numbers (see note 6 for full p/n example) 722-5 722d-5 722-6 722d-6 722-9 722d-9 722-12 722d-12 722-18 722d-18 722-26 722d-26 coil voltage (vdc) nom. 5.0 6.0 9.0 12.0 18.0 26.5 max. 6.0 8.0 12.0 16.0 24.0 32.0 coil resistance (ohms ?0% @25? 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
?003 teledyne relays specifications are subject to change without notice 722 page 98 www.teledynerelays.com 722/1203/q1 centigrid ? and to-5 .370 (9.40) dia. max. case detail .335 (8.51) dia. max. .280 (7.11) max. wire lead: .75 (19.05) min. .017 (.43) dia. +.002 (.05) C001 (.03) .031 (0.79) .003 (0.08) 36 3 typ. .035 (0.89) .010 (0.25) .200 (5.08) .010 (.25) dia. .200 (5.08) .010 (.25) dia. 1 2 3 4 5 6 7 8 9 10 dimensions are s hown in inches (millimeters) terminal lo cations and pi n numbers (ref. onl y) (viewed from t erminals) schematics a re viewed from terminals. contacts shown in position resulting when coil a last energized. 722d coil b coil a 722 coil a coil b series 722 outline dimensions schematic diagram general notes 1. relay contacts will exhibit no chatter in excess of 10 sec or transfer in excess of 1 ?ec. 2. ypical characteristics are based on available data and are best estimates. no on- going verification tests are performed. 3. unless otherwise specified, parameters are initial values. 4. unless otherwise specified, relays will be supplied with either gold-plated or solder- coated leads. 5. the slash and characters appearing after the slash are not marked on the relay. 6. te l edyne part numbering system f or commercial relays 722 x m - 26 / s q pad option (see appendix) relay series optional ground pin (see appendix ) coil voltage q= solder coated leads g= gold plated leads (notes 4 and 5) s= 0.187" leads (note 5)
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