722-26 TELEDYNE, 722-26 Datasheet
722-26
Manufacturer Part Number
722-26
Description
RF (Radio Frequency) Relays 26V DC-1GHz .15W
Manufacturer
TELEDYNE
Series
722r
Datasheet
1.722-26.pdf
(3 pages)
Specifications of 722-26
Coil Current
0.15 W
Contact Rating
1 A at 28 VDC
Frequency
1 GHz
Contact Form
2 Form C (DPDT)
Coil Voltage
26.5 VDC
Coil Type
Latching Magnetic
Power Consumption
290 mW
Termination Style
PCB
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
©2003 TELEDYNE RELAYS
DESCRIPTION
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.
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
• High force/mass ratios for resistance to shock and vibration.
• Advanced cleaning techniques provide maximum assurance of
• Precious metal alloy contact material with gold plating assures
PRINCIPLE OF OPERATION
Energizing Coil B produces a magnetic field
opposing the holding flux of the permanent
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.
mechanical rigidity.
internal cleanliness.
excellent high current and dry circuit switching capabilities.
DESIGNATION
SERIES
722D
722
SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE
DPDT basic relay
DPDT relay with internal diode for coil transient suppression
MAGNETIC CIRCUIT B
ARMATURE
SOFT IRON
SOFT IRON
DPDT MAGNETIC LATCHING
CORE B
COIL B
PERMANENT MAGNET
COMMERCIAL
TO-5 RELAYS
www.teledynerelays.com
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 “memory”
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).
MAGNETIC CIRCUIT A
SOFT IRON FRAME
RELAY TYPE
MOVING
CONTACT
COIL A
SOFT IRON
CORE A
AIR GAP
STATIONARY
CONTACT
Temperature
(Ambient)
Vibration
(General Note 1)
Shock
(General Note 1)
Enclosure
Weight
PHYSICAL SPECIFICATIONS
ENVIRONMENTAL AND
Storage
Operating –55°C to +85°C
SERIES
–65°C to +125°C
10 g’s to 500 Hz
30 g’s,
6 msec, half-sine
Hermetically sealed
0.1 oz. (2.9g) max.
722
722 Page 96
722/1203/Q1
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722-26 Summary of contents
Page 1
... RELAY TYPE DPDT basic relay DPDT relay with internal diode for coil transient suppression 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 ...
Page 2
... TYPICAL DC CONTACT RATING (RESISTIVE) 0.2 0.3 0.4 ...
Page 3
... SCHEMATIC DIAGRAM COIL B .200 (5.08) COIL A .010 (.25) DIA. 722 COIL B COIL A 722D SCHEMATICS ARE VIEWED FROM TERMINALS. CONTACTS SHOWN IN POSITION RESULTING WHEN COIL A LAST ENERGIZED. Q= Solder Coated Leads G= Gold Plated Leads (Notes 4 and 5) S= 0.187" leads (Note 5) Coil Voltage 722 Page 98 722/1203/Q1 ...