TELEDYNE RELAYS
COMMERCIAL CENTIGRID®
MAGNETIC LATCHING
R.F. RELAYS
SERIES
RF170
DPDT
DESCRIPTION
• 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.
• Gold plated precious metal alloy contacts ensure reliable d.c.
switching from dry-circuit to 1/4 amp, as well as low, stable
insertion loss.
The RF170 Series relay is an ultraminiature, hermetically sealed,
magnetic-latching relay featuring extremely low intercontact capacitance
for exceptional R.F. performance over the full UHF spectrum. Its low
profile height and .100" grid spaced terminals (precluding the need for
spreader pads) make it ideal for applications where extreme packaging
density and/or close PC board spacing are required.
The basic design and internal structure are similar to the TO-5 421
Series relay. In addition, the RF170 design has been optimized for use
in RF attenuators, RF switch matrices, and other applications requiring
high isolation, low insertion loss, and low VSWR.
The RF170 relay is ideally suited for applications where power dissipation
must be minimized. The relays can be operated with a short-duration
pulse. After the contacts have transferred, no external holding power is
required.
Unique construction features and manufacturing techniques provide
overall high reliability and excellent resistance to environmental
extremes.
The magnetic-latching feature of the RF170 Series provides a “memory”
capability, since the relays will not reset upon removal of coil power.
PRINCIPLE OF OPERATION
ENVIRONMENTAL AND
PHYSICAL SPECIFICATIONS
Energizing Coil B produces a magnetic
field opposing the holding flux of the
permanent magnet in Circuit B. As this
MAGNETIC CIRCUIT A
SOFT IRON CORE A
PERMANENT MAGNET
MAGNETIC CIRCUIT B
Temperature
(Ambient)
-55°C to + 85°C
SOFT IRON FRAME
net holding force decreases, the attrac-
tive 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
COIL A
COIL B
Vibration
Shock
10 g’s to 1000 Hz
(Note 3)
AIR GAP
STATIONARY
CONTACT
SOFT IRON
ARMATURE
against Core A. The armature then
30 g’s for 6 msec.
(Note 3)
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 cancella-
tion of a magnetic field, it is necessary
MOVING
CONTACT
Enclosure
Weight
Hermetically sealed
to apply the correct polarity to the relay coils as indicated on the relay schematic.
0.10 oz
(2.9 gms.) max.
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 volt-
age 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
magnetic neutral position.
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TELEDYNE [ TELEDYNE TECHNOLOGIES INCORPORATED ]
