The Pickering Series 109-1-A-12/1 is a single-pole, normally-open (1 Form A) reed relay with a 12 V coil and no internal diode, designed for high-density circuit applications. It features a mu-metal package providing magnetic shielding with a typical interaction level of 1%, and mounts on a 0.15-inch pitch. The relay is rated for up to 200 W switching power with a contact current of 1.2 A and a contact voltage of 200 V. Contact insulation resistance exceeds 10¹² Ω, and the typical switch capacitance is 2.5 pF when closed and 0.1 pF when open. Operating temperature range is -20 to +85 °C, extendable to +125 °C with increased coil voltage. Dimensions are 0.595 in (15.1 mm) long and 0.145 in (3.7 mm) wide, with pins spaced at 0.15 in (3.8 mm) pitch.
The mu-metal packaged Series 109 and 109RF and the plastic packaged Series 109P and Series 109PH, are magnetically screened single-in-line reed relays that stack on 0.15 inches x 0.6 inches pitch. The adjacent column gives further details of the device types available.
These relays require little more than half the board area of the more usual 0.2 x 0.8 inch devices, this allows around 80 percent more relays onto your board. These are the ideal choice for high density applications such as A.T.E. switching matrices or where very little board area is available.
Mu-metal, due to its high permeability and low magnetic remanance is used to provide magnetic screening. This 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 two additional relays, stacked one each side, are themselves operated. An unscreened device mounted on this pitch would have an interaction fi gure of around 40 percent. Relays of this size without magnetic screening would therefore be totally unsuitable for applications where dense packing is required. Pickering Series 109 and 109RF have a typical interaction fi gure of 1 percent. Series 109P and 109PH have a typical fi gure of 3 percent.
Two types of Form A (energize to make) switches are available, a general purpose switch (switch no.1) and a vacuum sputtered ruthenium switch (switch no.2) which is ideal for low level or cold switching applications. 5 volt coils normally have a resistance of 500 ohms and 12 volt coils are 1000 ohms. A sensitive single pole 5 volt device with a 1000 ohms coil is also available. Internal back E.M.F. clamping diodes are an option for all types. The small size of these relays often makes it possible to increase the functionality of existing designs without increasing the size of printed circuit boards.
| Pickering Electronics | |
|---|---|
| Product Category | Electromechanical Relays |
| Product Number | 109-1-A-12/1 |
| Product Name | Series 109 |
| Relay Type | General; Reed Relay |
| Mounting | PCBoard |
| Poles | Single Pole (SP) |
| Throw | Single Throw |
| NO | 1 |
