rf341 Willow Technologies Ltd, rf341 Datasheet

rf341

Manufacturer Part Number

rf341

Description

Ultraminiature Magnetic Latching To-5 Relays Spdt

Manufacturer

Willow Technologies Ltd

Datasheet

1.RF341.pdf (3 pages)

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DESCRIPTION

The RF341 series relay is an ultraminiature, hermetically

sealed, magnetic latching relay featuring extremely low

intercontact capacitance for exceptional RF performance

well into the C band. It’s low profile and small size make it

ideal for for applications where extreme packaging density

and/or close PC board spacing are required. Due to its

minimal mass, many relays may be used to configure

replacements

substantial savings in weight

The basic operating mechanism is similar to the TO-5 422

series relay. In addition, the RF341 design has been

optimized by increasing the distance between the set/reset

contacts. This design improvement make these unique

relays the perfect choice for use in RF attenuators, RF

switching matrices and other RF applications requiring

high isolation, low insertion loss and low VSWR.

The

manufacturing techniques provide overall high reliability

PRINCIPLE OF OPERATION

Energizing

magnetic field opposing the holding

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 in position against Core A. The

armature then remains in this position

upon removal of power from Coil B, but will snap back to 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 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 observed, It is

possible for the relay to be in a magnetically neutral position. Should this happen

however, pulsing one coil or the other, as prescribed, will bring the relay back into

proper operating condition.

following

Coil

for

unique

bulkier

produces

construction

switching

MAGNETIC LATCHING

TO-5 RELAYS SPDT

MAGNETIC CIRCUIT B

ULTRAMINIATURE

SOFT IRON

ARMATURE

COIL B

CONTACT

solutions

MOVING

features

TELEDYNE RELAYS

DC TO C BAND

PERMANENT MAGNET

and

• Minimum mass components and welded construction

• Uni-frame motor design provides high magnetic

• Advanced cleaning techniques provide maximum

• Gold plated precious metal contacts ensure reliable, low

and excellent resistance to environmental extremes:

The RF341 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.

The magnetic latching feature of the RF341 series

provides a non volatile memory capability since the

relays will not reset upon removal of coil power.

efficiency and mechanical rigidity.

assurance of internal cleanliness.

level switching.

provide maximum resistance to shock and vibration.

MAGNETIC CIRCUIT A

SOFT IRON CORE A

SOFT IRON FRAME

STATIONARY

CONTACT

COIL A

Temperature

Vibration

Shock

Acceleration

Enclosure

Weight

PHYSICAL SPECIFICATIONS

( Ambient )

ENVIRONMENTAL AND

SERIES

RF341

-55° C to

30G to 2,000

75G for 6 ms

50G

Hermetically

(2.52 gm)

0.09 oz.

+85° C

Hz (note 1)

max.

(note 1)

sealed

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rf341 Summary of contents

Page 1

... The basic operating mechanism is similar to the TO-5 422 series relay. In addition, the RF341 design has been optimized by increasing the distance between the set/reset contacts. This design improvement make these unique relays the perfect choice for use in RF attenuators, RF switching matrices and other RF applications requiring high isolation, low insertion loss and low VSWR ...

Page 2

INSERTION LOSS (RF Note 1) -0.00 -0.25 -0.50 -0.75 -1.00 -1.25 -1.50 -1.75 -2.00 -2.25 -2.50 0 500 1,000 VSWR 1.50 1.45 1.40 1.35 1.30 1.25 1.20 1.15 1.10 1.05 1.00 0 500 1,000 ISOLATION (RF Note ...

Page 3

... Characteristics shown as “typical” are based on available data and are best estimates going verification tests are performed. 4. Pin positions 5 and 10 are recesses in the header for ground pin options (ground pins not shown). 5.To order ground pin options add Y (pin 5 position) or Z(pin 10 position) to the part base part number. Ex. RF341Y-5 6. Contact Teledyne Relays for Hi-Rel Screening/Program options. ...

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