1080 pages

PICKERING SERIES 108
Micro-SIL Reed Relays
w
Ne olt
3 V sion
r
Ve
for stacking on 0.15 x 0.8 inches pitch
FEATURES
zz SoftCenter™ construction (see opposite)
zz Encapsulated in a mu-metal can
zz Insulation resistance greater than 1012 ohms for
Form A devices
zz Dry switches available in 1 Form A, 2 Form A
and 1 Form C configurations. 2 Form A types
require the same board area as 1 Form A
zz 3, 5 and 12 Volt coils are standard, with or
without internal diode
The Pickering Series 108 is a range of magnetically screened
single-in-line reed relays that stack on 0.15 inches (3.8mm) pitch,
resulting in a 25 percent saving in board space over 0.2 inch
(5.08mm) wide relays. This means that it is possible to pack 33
percent more relays into the same board area.
Dimensions in Inches
(Millimetres in brackets)
Pin 1
Switch Ratings
Their small size, superb contact resistance stability and ultra
high insulation resistance, greater than 1012 ohms for Form A
devices, make these relays a popular choice for high quality
instrumentation.
Dry switches are available in 1 or 2 Form A (energize to make)
and 1 Form C (change-over) configurations. 3, 5 and 12 Volt coils
are available, 5 Volt coils have a resistance of 500 Ohms and may
therefore be driven directly from TTL logic.
1 Form A, 1 Form C, 0.26 (6.6)
2 Form A, 1 Form B, 0.35 (8.9)
P
M IC
ic K
ro
-S E R
IL I
R N
el G
ay
zz 100% tested for dynamic contact resistance
The device is encapsulated in a mu-metal can using a very high
resistivity resin. Mu-metal is used rather than steel because of
both its very high permeability and its low magnetic remanance.
This construction totally eliminates the risk of magnetic
interaction problems. Magnetic interaction is usually measured
as a percentage increase in the voltage required to operate a
relay when two additional relays, stacked one each side, are
themselves operated. An unscreened device mounted on this
pitch would have an interaction figure of around 40 percent,
it would therefore be totally unsuitable for applications where
relays are to be packed densely. Pickering Series 108 have a
typical interaction figure of only 1 percent.
0.145 (3.7)
0.79
(20.1)
zz 5 Volt coils are 500 ohms and may be driven
directly from TTL logic
zz 1 Form A (energize to make),
10 watts at 200V
zz 2 Form A (energize to make),
10 watts at 200V
zz 1 Form C (change-over),
3 watts at 200V
30%
www.pickeringrelay.com
zz Highest quality instrumentation grade switches
Other
Unscreened
0.2 inch relays
20%
Percentage
Interaction
109P
110
10%
111P
(change in
108 112
operate
106
109
voltage)
111
0.1
Key:
107
101 Pickering
relays 100
0.3
0.2
Package Width (inches)
Unscreened
pickering
www.pickeringrelay.com
104
105
Internal
mu-metal
screen
0.4
Complete
mu-metal
can
pickering
108/06/09