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Pickering Series 125
NEW ULTRA-HIGH DENSITY 5MM REED RELAYS
Ultra High Density Reed Relays
Up to 1 Amp, 20 Watts Switching
Stacking on 5mm x 5mm Pitch – the Highest Packing Density for 2-Pole, 1 Form A RF, 1 Form B and 1 Form C reed relays
- 3V, 5V or 12V coils with diode
- 1 Form A (SPST-NO), 1 Form A RF (SPST-NO), 1 Form B (SPST-NC), 1 Form C (SPDT) & 2 Form A (DPST) reed relays
- Full mu-metal magnetic screening reduces interaction from 40% to just 1%
- Insulation resistance greater than 10¹²Ω
- 100% tested for dynamic contact resistance for guaranteed performance
- Ideal for A.T.E. switching matrices or multiplexers
- Highest quality instrumentation grade reed switches
- Many benefits compared to industry standard relays. Learn more here >.
- Highest packing density 1A RF, 1B 1C & 2A reed relay currently available
- Designed in the United Kingdom and manufactured in the United Kingdom and the Czech Republic.
Series 125 relays occupy just 5 mm × 5 mm of board area, making them ideal for very high-density ATE switch matrices, PXI/LXI cards and multiplexers. The range delivers the smallest footprint for 2 Form A relays and now also for 1 Form A RF (coaxial), 1 Form B and 1 Form C variants, so you can maximise channel count without sacrificing instrumentation performance. Despite the compact package, Series 125 relays contain an internal diode.
Switch options
- Type 1 (general-purpose, sputtered ruthenium): up to 20 W / 1 A with 12 V coils, or 15 W / 1 A with 3 V/5 V coils — best where higher power or inrush handling is needed.
- Type 2 (low-level, sputtered ruthenium): 10 W / 0.5 A — ideal for low-current/low-voltage and cold-switching use in ATE.
- Type 3 (changeover, rhodium): 2 W / 0.1 A — for compact 1 Form C (SPDT) routing.
These switches are the same instrumentation-grade elements used across established Pickering ranges, oriented vertically to achieve the Series 125 density.
Layout & connectivity
The device uses pins on a 3.5 mm square pitch. Compatible SMD and through-hole connectors from third parties allow stacking in rows or matrices on a 5 mm pitch.
Note: While socketing isn’t generally recommended (to maintain optimum contact resistance stability), we recognise some users may prefer sockets for serviceability.
All our data sheets have been recently updated to include additional environmental specifications, mechanical characteristics and relay weights, RF plots for coaxial relays (showing VSWR, isolation and insertion loss), interactive links to further useful information, comparison tables to similar relay ranges and much more.
The download is a zip file containing 3D models in STEP, IGS and SLDPRT formats (free viewers are available for these formats).
- Free Sample Service – determining which components to design in can be challenging. Fortunately, here at Pickering Electronics, we provide free working samples to help you evaluate our high-quality Reed Relays.
- Reed Relay Selector Tool – this tool will help you narrow down our large offering to get you the correct reed relay for your application. Once you narrow your selections down you can download a relay datasheet for more information, purchase in stock items or request a quote to find out lead times of made to order (MTO) relays.
- Concise Tech Guide – this guide will help you to maximise the reliability of your design.
- Quality Assurance – learn more about the various accreditations and certifications that Pickering holds.
- Custom Designed Reed Relays – With over a thousand catalog parts there is plenty of choice when choosing the right Reed Relay for your product, but if you cannot find one suitable for your needs Pickering can customize our standard reed relay parts to suit your specific requirements and applications.
All Pickering reed relays feature the highest quality instrumentation grade reed switches making them suitable for the most demanding applications. Internal mu-metal magnetic screens allow very high packing density. Diodes are optional.
