1170 pages

PICKERING SERIES 117
Single-in-Line reed relays
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Ne olt
3 V sion
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3 Watts switching - Very high packing density
1 Form A stacks on 0.15 x 0.27 inches pitch
2 Form A stacks on 0.15 x 0.40 inches pitch
FEATURES
SoftCenter™ construction (see opposite)
Plastic package with internal mu-metal magnetic
screen
They take up the minimum of board area,
conserving board space
3 or 5 Volt coils with or without internal diode
1 Form A 0.26 nominal (6.60)
0.27 maximum (6.86)
2 Form A 0.39 nominal (9.90)
0.40 maximum (10.16)
0.145 nominal (3.70)
0.15 maximum (3.81)
100% tested for dynamic contact resistance for
guaranteed performance
0.375 nominal (9.52)
0.385 maximum (9.78)
The Pickering Series 117 is a range of Single-in-Line relays
intended for very high density applications such as A.T.E.
switching matrices or multiplexers.
Single switch versions require a board area of only 0.15 inches
x 0.27 inches. This is one quarter of the board area of the
industry standard 0.2 x 0.8 inches Single-in-Line packge.
The very small size of these relays often makes it possible to
increase the functionality of existing designs without increasing
the size of printed circuit boards.
The Series 117 switch rating of 3 Watts, 0.25 A. is adequate
for most instrumentation applications. If a higher rating
is required, the Series 116, which is rated at 10 Watts,
0.5 A. should be considered. The relay footprint and pin
configurations of the Series 116 are identical but the case
height increases slightly to 0.49 inches. (12.5 mm.)
The relays feature an internal mu-metal magnetic screen.
Mu-metal has the advantage of a high permeability and low
magnetic remanence and eliminates problems that would
otherwise occur due to magnetic interaction. Interaction is
usually measured as a percentage increase in the voltage
required to operate a relay when additional relays, stacked
each side, are themselves operated. An unscreened device
mounted on this pitch would have an interaction figure of
around 40 percent. Relays of this size without magnetic
screening would therefore be totally unsuitable for applications
where dense packing is required.
3 volt and 5 volt coils are available with an optional Back
E.M.F suppression diode.
Dimensions in Inches
(Millimetres in brackets)
Pickering SoftCenter™ Construction
TYPICAL PICKERING CONSTRUCTION
Encapsulation
Shell
PICKERING
They are available with either 1 or 2 Form A (energize to
make) switches.
Pin 1
Internal mu-metal magnetic screen
permitting high packing density without
magnetic interaction
117-1-A-5/2D
Insulation resistance greater than 1012 Ω
1 Form A
PICKERING
England
117-2-A-5/2D
2 Form A
Actual size
Former-less
operating coil
Delicate
glass/metal
reed switch seal.
Must be
protected
Diode
Instrumentation
grade
reed switch
TYPICAL COMPETITOR’S CONSTRUCTION
www.pickeringrelay.com
Highest quality instrumentation grade switches
No mu-metal
magnetic screen
Internal
mu-metal
magnetic
screen
Encapsulation Soft inner
Shell
encapsulation
material
to protect
reed switch
Bobbinless
self
supporting
coil to
maximise
magnetic drive
pickering
www.pickeringrelay.com
Very hard
moulding material
High magnetic
interaction
with adjacent
relays
Reed switch
Diode
Coil winding
Hard outer
encapsulation
material
Coil supporting
bobbin,
wastes space
and reduces
magnetic drive
pickering
117/08/10