TELEDYNE RELAYS SERIES 722 COMMERCIAL/INDUSTRIAL TO-5 RELAY DPDT MAGNETIC LATCHING SERIES DESIGNATION RELAY TYPE 722 DPDT relay 722D DPDT relay with internal diode for coil transient suppression DESCRIPTION The TO-5 relay, originally conceived and developed by Teledyne, has become one of the industry standards for low level switching from dry circuit to 1 ampere. Designed expressly for high density PC Board mounting, its small size and low coil power dissipation make the TO-5 relay one of the most versatile ultraminiature relays available. 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 722D Series utilizes discrete silicon diodes for coil suppression. The 722 Series magnetic latching relays are ideally suited for applications where power dissipation must be minimized. The relays can be operated with a short duration pulse and after contacts have transferred, no external holding power is required. The magnetic latching feature of the 722 Series provides a "memory" capability, since the relays will not reset upon removal of power. By virtue of its inherently low intercontact capacitance and contact circuit losses, the TO-5 relay has shown itself 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 hand held 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 PERMANENT MAGNET MAGNETIC CIRCUIT A Energizing Coil B produces a magnetic field opposing the SOFT IRON FRAME holding flux of the permanent magnet in Circuit B. As this MAGNETIC CIRCUIT B net holding force decreases, the attractive force in the air gap of Circuit A, which also results from the flux of the COIL A COIL B permanent magnet, becomes great enough to break the armature free of Core B, and snap it into a closed position SOFT IRON SOFT IRON CORE A CORE B against Core A. The armature then remains in this position AIR GAP upon removal of power from Coil B, but will snap back SOFT IRON STATIONARY into position B upon energizing Coil A. Since operation ARMATURE CONTACT 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. MOVING CONTACT 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. 101 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) half-sine Enclosure Hermetically sealed Weight 0.1 oz (2.9 gms.) max. SERIES 722 GENERAL ELECTRICAL SPECIFICATIONS (@ 25°C)) (Notes 1 & 2) Contact Arrangement Rated Duty Contact Resistance Contact Load Rating (DC) (See Fig. 2 for other DC resistive voltage/current ratings) 2 Form C (DPDT) Continuous 0.15 ohm max. before life; 0.25 ohm max. after life at 1A/28VDC, (measured 1/8” from header) Resistive: 1 Amp/28VDC Inductive: 200 mA/28VDC (320 mH) Lamp: 100 mA/28VDC Low Level: 10 to 50 µA/10 to 50 mV Resistive: 250 mA/115VAC, 60 and 400Hz (Case not grounded) 100 mA/115VAC, 60 and 400Hz (Case grounded) 10,000,000 cycles (typical) at low level 01,000,000 cycles (typical) at 0.5A/28VDC resistive 00,100,000 cycles min. at all other loads specified above 2A/28VDC Resistive (100 cycles min.) Contact factory 290 milliwatts typical at nominal rated voltage 2.0 msec. max. at nominal rated coil voltage 6.0 msec. at nominal voltage 0.4 pf typical 1,000 megohms min. between mutually isolated terminals Atmospheric pressure: 350 VRMS/60 Hz 60 VDC, min. 2.0 Volt, max. Contact Load Ratings (AC) Contact Life Ratings Contact Overload Rating Contact Carry Rating Coil Operating Power Operate Time Minimum Operate Pulse lntercontact Capacitance Insulation Resistance Dielectric Strength Diode P.I.V. 720D/722D Negative Coil Transient 720D/722D DETAILED ELECTRICAL SPECIFICATIONS (@ 25°C) (Note 2) ➧ BASE PART NUMBERS Coil Voltage (VDC) 722-5 722D-5 Nom. Max. 5.0 6.0 61 3.5 Coil Resistance (Ohms ± 20% @ 25°C) Set & Reset Voltage (VDC, Max.) Pulse Operated 722-6 722D-6 722-9 722D-9 722-12 722D-12 722-18 722D-18 722-26 722D-26 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 PERFORMANCE CURVES (NOTE 1) TYPICAL RF PERFORMANCE 0 TYPICAL DC CONTACT RATING (RESISTIVE) INSE LOS .2 300 S .3 10 1.92 20 WR) SS (VS N LO 1.22 RETUR 30 40 TION ISOLA 50 1.07 CTS ONTA SS C ACRO 1.02 1.01 LES SS PO N ACRO O ISOLATI 60 VSWR dB .4 LOAD VOLTAGE (VDC) RTIO N .1 200 150 100 50 1.00 70 250 1.00 .01 0.5 .1 .5 1.0 0 0.1 0.2 0.3 0.4 0.5 0.6 FREQUENCY (GHz) LOAD CURRENT (AMPS DC) FIGURE 1 FIGURE 2 102 0.7 0.8 0.9 1.0 SERIES 722 OUTLINE DIMENSIONS TERMINAL LOCATIONS AND PIN NUMBERING (REF. ONLY) (Viewed from Terminals) CASE DETAIL .370 (9.40) DIA. MAX. .031 (.79) ± .003 (0.08) .200 (5.08) ± .010 (.25) DIA. .335 (8.51) DIA. MAX. 10 9 .035 (.89) ± .010 (0.25) .280 (7.11) MAX. .200 (5.08) ± .010 (.25) DIA. 1 8 2 7 3 6 36° ±3° TYP. 5 4 WIRE LEAD: .75 (19.05) MIN. +.002 (.05) .017 (.43) –.001 (.03) DIA. DIMENSIONS ARE SHOWN IN INCHES (MILLIMETERS) SPACER PAD SCHEMATIC DIAGRAMS Relays can be supplied with a spacer pad attached to the relay header. The pad permits the relay to be spaced away from the mounting surface facilitating solder joint inspection. To order add M4 to the part number (e.g. 722M4-26). COIL B COIL B .305 MAX (7.75) COIL A 722 COIL A 722D NOTES: 1. Material: Polyester film. 2. Increase contact resistance by 0.01 ohm. SCHEMATICS ARE VIEWED FROM TERMINALS. CONTACTS SHOWN IN POSITION RESULTING WHEN COIL A LAST ENERGIZED. NOTES: SPREADER PAD Relays can be supplied with spreader pads which are attached to the relays. Spreaders can be supplied by adding M to the part number (e.g. 722M-26). .370 SQ. MAX. (9.40) 1. Characteristics shown as "typical" are based on available data and are best estimates. No on-going verification tests are performed. 2. Unless otherwise specified, parameters are initial values. 3. Relays will exhibit no contact chatter in excess of 10 µsec or transfer in excess of 1 µsec. .100 (2.54) .100 (2.54) .150 (3.81) .300 (7.62) .200 (5.08) ( .41 .016 ) .18 .007 .398 MAX. (10.11) NOTES: 1. Material: Diallyl phthalate. 2. Increase contact resistance by 0.925 ohm. ©1996 TELEDYNE RELAYS 103 12525 Daphne Avenue Hawthorne, California 90250