The Pickering Series 89 is a mercury-wetted reed relay with a 1 Form A switch configuration, designed for high-voltage switching up to 500 V and carrying up to 3 A. It features a 12 V coil with an initial resistance of 750 Ω, an internal magnetic shield, and is encapsulated in a plastic package. The relay is intended for PCB mounting with a 0.1 inch pin grid and must be mounted vertically as indicated by the arrow on the package. It shares the same footprint and pinout as the dry Series 85 relays, allowing for easy replacement without PCB redesign. Life expectancy is rated at up to 10^8 operations under low-load conditions. The part number 89-1-A-12/1 is not explicitly listed, but the 12 V variant with diode (89-1-A-12/1D) is referenced, indicating the /1 suffix without D is an equivalent base configuration.
These ranges of reed relays are available with both dry and mercury wetted switches. They are available with 5, 12 and 24 volts coils, a particularly useful feature of the 5 volt dry devices is their ability to be driven directly from TTL, the coil requiring only 10mA of drive current. All units have an internal magnetic screen and can be supplied with built-in diode if required.
Standard coil voltages are 5, 12 and 24 volts. All relays are fitted with internal magnetic screen to avoid stray magnetic interaction between adjacent relays. Many special coil resistances are available, and relays can be designed to customers specific requirements. These Pickering relays fit straight onto P.C. boards with pins on the popular 0.1 inch grid. They are completely protected, being encapsulated in plastic cases. With these series you get the choice of three different dry reed switches and two mercury wetted switches in a range of configurations to cover all switching problems. See Switch Ratings in adjacent column.
The Series 80 and 85 are electrically similar ranges but with alternative pin configurations; these are shown overleaf. Their mercury wetted equivalents are prefixed 88 and 89 respectively..
| Pickering Electronics | |
|---|---|
| Product Category | Electromechanical Relays |
| Product Number | 89-1-A-12/1 |
| Product Name | Series 80 |
| Relay Type | General; Reed Relay |
| Mounting | PCBoard |
| Poles | Single Pole (SP) |
| Throw | Single Throw |
| Features | Mercury Wetted Contacts |
