Series SGRF424 Magnetic-Latching Electromechanical Relay Signal Integrity up to 10Gbps, MAGNETIC-LATCHING DC-8 GHz TO-5 RELAYS 4PST SERIES RELAY TYPE SGRF424 4PST RF Relay SGRF424D 4PST RF Relay with internal diodes for coil transient suppression DESCRIPTION Minimum mass components and welded construction The RF424 series relay is an ultraminiature, hermetically provide maximum resistance to shock and vibration. sealed, magnetic-latching relay featuring low intercontact Advanced cleaning techniques provide maximum capacitance for exceptional RF performance from DC-8 assurance of internal cleanliness. GHz. Its low pro le and small size make it ideal for Gold-plated precious metal contacts ensure reliable, applications where extreme packaging density and/or lowlevel switching. close PC board spacing are required. Due to its minimal mass, many relays may be used to con gure The RF424 relay is ideally suited for applications where replacements for bulkier switching solutions at a power dissipation must be minimized. The relays can be substantial savings in weight.These design features make operated with a short duration pulse. After the contacts these unique relays the perfect choice for use in RF have transferred, no external holding power is required. attenuators, RF switching matrices and other RF The magnetic latching applications requiring low insertion loss and low VSWR. feature of the RF424 series provides a nonvolatile The basic operating mechanism is similar to the TO-5 422 memory capability since the relays will not reset upon series relay. removal of coil power. The 424D series utilizes discrete diodes for coil The following unique construction features and suppression. manufacturing techniques provide overall high reliability and excellent resistance to environmental extremes: PRINCIPAL OF OPERATION PERMANENT MAGNET MAGNETIC CIRCUIT A MAGNETIC CIRCUIT B SOFT IRON FRAME Energizing Coil B produces a + magnetic eld opposing the hold- COIL A COIL B ing ux of the permanent magnet SOFT IRON SOFT IRON COIL B COIL A in Circuit B. As this net holding - AIR GAP SOFT IRON force decreases, the attractive ARMATURE STATIONARY CONTACT force in the air gap of Circuit A, which also results from the ux of the ENVIRONMENTAL AND MOVING permanent magnet, becomes great PHYSICAL SPECIFICATIONS CONTACT enough to break the armature free of Temperature Core B, and snap it into a closed Storage 65C to +125C position against Core A. The armature then remains in this position upon Operating 55C to +85C removal of power from Coil B, but will snap back into position B upon Vibration energizing Coil A. Since operation depends upon cancellation of a magnetic 10 gs to 500 Hz (General Note 1) eld, 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 Shock 30 gs, for 6 msec latch and reset coils should not be pulsed simultaneously. Coils should not be (General Note 1) half sine pulsed with less than rated coil voltage and the pulse width should be a Hermetically minimum of three times the speci ed operate time of the relay. If these Enclosure Sealed conditions are not followed, it is possible for the relay to be in the magnetic neutral position. Weight 0.1 oz. (2.9g) max. 2013 TELEDYNE RELAYS (800) 284-7007 www.teledynerelays.com SGRF424 Page 1 SGRF424 062013 Q2 - +Series SGRF424 Magnetic-Latching Electromechanical Relay Signal Integrity up to 10Gbps, SERIES SGRF424/SGRF424D TYPICAL RF CHARACTERISTICS (See RF Notes) Isolation Across Contacts (RF Note 4) Isolation Pole to Pole (RF Note 5) 0 -20 -10 -30 -20 -40 -30 -50 -40 -50 -60 -60 -70 -70 Path: 1-2 or 8-9 -80 Path: 1-2 or 8-9 -80 Path: 3-4 or 6-7 Path: 3-4 or 6-7 -90 -90 012345678 012345678 Frequency, GHz Frequency, GHz Insertion Loss (RF Note 6) VSWR (RF Note 6) 0 4 -0.2 Path: 1-2 or 8-9 3.5 -0.4 Path: 3-4 or 6-7 -0.6 3 -0.8 2.5 -1 -1.2 2 -1.4 -1.6 1.5 Path: 1-2 or 8-9 -1.8 Path: 3-4 or 6-7 -2 1 012345678 012345678 Frequency, GHz Frequency, GHz RF NOTES 1. Test conditions: a. Fixture: .031 copper clad, reinforced PTFE, RT/duroid 6002 with SMA connectors. (RT/duroid is a registered trademark of Rogers Corporation.) b. Relay header is soldered to ground plane. c. Room ambient temperature. d. All terminals not tested were terminated with 50-ohm load. e. Contact signal level: 10 dBm. f. No. of test samples: 2. 2. Data presented herein represents typical characteristics and is not intended for use as specification limits. 3. Data is per pole, except for pole-to-pole data. 4. Data is the average from readings taken on poles after Coil A is energized then Coil B is energized. 5. Data is the average from readings taken on all closed contacts. 6. Test fixture effect de-embedded from frequency and time response data. SGRF424 Page 2 SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE 2013 TELEDYNE RELAYS SGRF424 062012 Q2 Insertion Loss ( dB ) Isolation ( dB ) VSWR Isolation ( dB )