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ULTRA HIGH DENSITY 4mm

Ultra-high density 4mm2 TM reed relay product lines stack on a 4mm x 4mm pitch, allowing the highest packing density currently available in the industry. The relays feature the highest quality instrumentation grade reed switches and internal mu-metal magnetic screens. 4mm2 TM  reed relays are ideal for very high density applications such as A.T.E. switching matrices or multiplexers.

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Pickering Series 120

Single Pole Reed Relays
Up to 1 Amp switching - Very high packing density
Stacking on 4mm x 4mm pitch

  • 3V, 5V or 12V coils
  • 1 Form A (SPST) Normally Open Energize to make relay
  • Plastic package with internal mu-metal magnetic screen
  • Insulation resistance greater than 10¹²Ω
  • 100% tested for dynamic contact resistance for guaranteed performance
    Highest quality instrumentation grade reed switches
    Many benefits compared to industry standard relays. Learn more here >.
    Highest packing density currently available

The Series 120 reed relay range takes up the minimum board area making them ideal for very high density applications such as A.T.E. switching matrices or multiplexers. Requiring a board area of only 4mm x 4mm, these relays allow the highest packing density currently available.

Two switch types are available, a general purpose sputtered ruthenium switch rated at 15 Watts, 1 Amp (3 volt version) or 20 Watts, 1 Amp (5 & 12 volt versions) and a low level sputtered ruthenium switch rated at 10 Watts, 0.5 Amps.

These are the same reed switches as used in many other long established Pickering ranges but are orientated vertically within the package, allowing this high density. The small size of the package does not allow an internal diode. Back EMF suppression diodes are included in many relay drivers but if they are not, and depending on your drive methods, these may have to be provided externally.

While socketing relays is not normally recommended due to the risk of affecting contact resistance integrity, it is appreciated that sockets may sometimes be desired for ease of servicing/replacement, in the case of a relay being damaged or reaching the end of its working life.

The device has pins on a 2mm square pitch. There are suitable connectors available from some manufacturers, both SMD and Through Hole, that will allow these relays to be stacked in either a row or in a matrix on a 4mm pitch.

The below table will help you narrow down our offering to get you the correct reed relay for your application.

Once you narrow your selections down you can download a reed relay data sheet for more information or request a quote to find out prices and lead times.

Switching Current (Amps)
Coil Voltage
Contact Configuration
Diode
Switching Power (Watts)
Stand-Off Voltage (DC/AC peak)
Switching Voltage (DC/AC peak)
Depth (mm)
Height (mm)
Width (mm)
Series
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Part Number
Category
Contact Configuration
Switching Current (Amps)
Switching Power (Watts)
Switching Voltage (DC or AC peak)
Stand-off Voltage DC or AC peak
Coil Voltage
Coil Resistance (Ω)
Switch Type
Diode
Depth (mm)
Width (mm)
Height (mm)
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Price
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120-1-A-3/1
Ultra High Density 4mm
1 Form A - SPST N.O.
1
15
200
220
3V
200 Ω
General Dry Reed
No
3.9
3.9
15.5
$7.28
Max:
Min: 1
Step: 1
Add
120-1-A-3/1
Ultra High Density 4mm
1 Form A - SPST N.O.
1
20
200
220
5V
300 Ω
General Dry Reed
No
3.9
3.9
15.5
$7.31
Max:
Min: 1
Step: 1
Add
120-1-A-3/1
Ultra High Density 4mm
1 Form A - SPST N.O.
1
20
200
220
12V
800 Ω
General Dry Reed
No
3.9
3.9
15.5
$7.39
Max:
Min: 1
Step: 1
Add
120-1-A-3/1
Ultra High Density 4mm
1 Form A - SPST N.O.
0.5
10
200
220
3V
200 Ω
Low Level Dry Reed
No
3.9
3.9
15.5
$7.22
Max:
Min: 1
Step: 1
Add
120-1-A-3/1
Ultra High Density 4mm
1 Form A - SPST N.O.
0.5
10
200
220
5V
500 Ω
Low Level Dry Reed
No
3.9
3.9
15.5
$7.23
Max:
Min: 1
Step: 1
Add
120-1-A-3/1
Ultra High Density 4mm
1 Form A - SPST N.O.
0.5
10
200
220
12V
800 Ω
Low Level Dry Reed
No
3.9
3.9
15.5
$7.33
Max:
Min: 1
Step: 1
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