SERIES 722 COMMERCIAL TO-5 RELAYS DPDT MAGNETIC LATCHING SERIES DESIGNATION 722 722D RELAY TYPE DPDT basic relay DPDT relay with internal diode for coil transient suppression DESCRIPTION CENTIGRID® AND TO-5 The magnetic-latching 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 for high-density PC board mounting, the 722 relay has become one of the most versatile ultraminiature relays available because of its small size and low coil power dissipation. The Series 722D relay has discrete silicon diodes for coil transient suppression. Unique construction features and manufacturing techniques provide excellent resistance to environmental extremes and overall high reliability. 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 “memory” capability, since the relays will not reset upon removal of coil power. • 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. 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 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 enough to break the armature free of Core AIR GAP SOFT IRON B, and snap it into a closed position against ARMATURE STATIONARY CONTACT Core A. The armature then remains in this position upon removal of power from Coil B, but will snap back into position B upon MOVING energizing Coil A. Since operation depends CONTACT 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. ©2003 TELEDYNE RELAYS ENVIRONMENTAL AND PHYSICAL SPECIFICATIONS –65°C to +125°C Temperature Storage (Ambient) Operating –55°C to +85°C Vibration (General Note 1) 10 g’s to 500 Hz Shock (General Note 1) 30 g’s, 6 msec, half-sine Enclosure Hermetically sealed Weight 0.1 oz. (2.9g) max. SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE www.teledynerelays.com 722 Page 96 722/1203/Q1 SERIES 722 GENERAL ELECTRICAL SPECIFICATIONS (@25°C) (Notes 2 & 3) Contact Arrangement Rated Duty Contact Resistance 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) Contact Load Ratings (DC) (See Fig. 2 for other DC resistive voltage/current ratings) Resistive: Inductive: Lamp: Low Level: 1 Amp/28Vdc 200 mA/28Vdc (320 mH) 100 mA/28Vdc 10 to 50 µA/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 Contact Carry Rating Coil Operating Power Operate Time Minimum Operate Pulse Intercontact Capacitance Insulation Resistance Dielectric Strength Negative Coil Transient 722D Diode P.I.V. 722D 2A/28Vdc Resistive (100 cycles min.) Contact factory 290 milliwatts typical at nominal rated voltage 2.0 ms max at nominal rated coil voltage 6.0 ms width @ rated voltage 0.4 pf typical 1,000 megohms min. between mutually isolated terminals Atmospheric pressure: 350 Vrms/60Hz 2.0 Vdc Max. 60 Vdc Min. DETAILED ELECTRICAL SPECIFICATIONS (@25°C) (Note 3) BASE PART NUMBERS (See Note 6 for full P/N example) Nom. Max. Coil Voltage (Vdc) Coil Resistance (Ohms ±20% @25°C) Set & Reset Voltage (Vdc, Max.) Pulse Operated 722-5 722D-5 722-6 722D-6 722-9 722D-9 722-12 722D-12 722-18 722D-18 722-26 722D-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 PERFORMANCE CURVES (Note 2) TYPICAL RF PERFORMANCE 0 INS ERT .1 ION TYPICAL DC CONTACT RATING (RESISTIVE) 300 LOS 10 1.92 20 WR) S (VS 40 N ATIO S TACT 1.07 ON SS C O ACR ISOL 50 1.22 S RN LO RETU 30 1.02 S OLE OSS P N ACR 1.01 TIO ISOLA 60 1.00 70 VSWR dB .4 250 200 150 100 50 1.00 .01 722 Page 97 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 SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE www.teledynerelays.com 0.7 0.8 0.9 1.0 ©2003 TELEDYNE RELAYS 722/1203/Q1 CENTIGRID® AND TO-5 .3 LOAD VOLTAGE (VDC) S .2 SERIES 722 OUTLINE DIMENSIONS SCHEMATIC DIAGRAM TERMINAL LOCATIONS AND PIN NUMBERS (REF. ONLY) (Viewed from Terminals) CASE DETAIL .370 (9.40) DIA. MAX. COIL B .031 (0.79) .003 (0.08) .335 (8.51) DIA. MAX. .200 (5.08) .010 (.25) DIA. 10 9 .035 (0.89) .010 (0.25) COIL A 722 1 8 2 COIL B .280 (7.11) MAX. 7 WIRE LEAD: .75 (19.05) MIN. (.05) .017 (.43) +.002 –.001 (.03) DIA. .200 (5.08) .010 (.25) DIA. 3 6 36° ±3° TYP. 4 5 DIMENSIONS ARE SHOWN IN INCHES (MILLIMETERS) COIL A 722D SCHEMATICS ARE VIEWED FROM TERMINALS. CONTACTS SHOWN IN POSITION RESULTING WHEN COIL A LAST ENERGIZED. GENERAL NOTES 1. Relay contacts will exhibit no chatter in excess of 10 µsec or transfer in excess of 1 µsec. 2. “Typical” characteristics are based on available data and are best estimates. No ongoing 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 soldercoated leads. 5. The slash and characters appearing after the slash are not marked on the relay. 6. Teledyne Part Numbering System for Commercial Relays 722 X M - 26 / S Q Optional Ground Pin (See Appendix ) S= 0.187" leads (Note 5) Pad Option (See Appendix) Coil Voltage CENTIGRID® AND TO-5 Relay Series Q= Solder Coated Leads G= Gold Plated Leads (Notes 4 and 5) ©2003 TELEDYNE RELAYS SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE www.teledynerelays.com 722 Page 98 722/1203/Q1