The Series 89 mercury wetted reed relays are encapsulated plastic devices with internal mu-metal magnetic screening, designed for PCB mounting on a 0.1 inch pin grid. They are available with 5, 12, or 24 volt coils and feature 1 Form A (normally open) switching configurations. The mercury wetted contacts are rated for 50 watts at 500 volts with a maximum carry current of 3 amps. These relays must be mounted vertically as indicated by the arrow on the package. The coil resistance for the 5 volt version is 140 ohms. Pin configuration matches the Series 85 dry relays, allowing PCB compatibility between wetted and dry types.
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-5/1 |
| Product Name | Series 80 |
| Relay Type | General; Reed Relay |
| Mounting | PCBoard |
| Poles | Single Pole (SP) |
| Throw | Single Throw |
| Features | Mercury Wetted Contacts |
