The Series 101 is a CMOS drive SIL/SIP reed relay designed for direct operation from 74HC or HCT logic without external drivers, featuring an internal mu-metal magnetic screen that allows side-by-side stacking on 0.3 inch (7.6 mm) pitch. This variant, the 101-1-A-12/6, is a single pole Form A mercury wetted relay with a 12 V coil, rated for 2 A switching at 50 W, an operate time of 1.75 ms, and an insulation resistance of 10^12 Ω. It has a typical switch capacitance of 4.5 pF across the open contact and 0.08 pF across the closed contact. The relay requires correct coil polarity observation due to its internal diode and mercury wetted contacts. It shares the same 20.1 mm × 7.4 mm footprint and pin configuration as other Series 101 variants, with a Max. contact resistance of 0.075 Ω.
The Series 101 have very high coil resistances. 5 Volt dry versions may be driven directly from 74HC or 74HCT logic without the need for additional drivers.
74HC logic will drive up to 4mA at 5 Volts, therefore a coil resistance of 1600 ohms is desirable to avoid running the IC at its maximum rating; 1600 ohms is the coil resistance of the single pole dry Series 101. They may be stacked on 0.3 inches pitch (7.6mm) and as they have an internal mu-metal magnetic screen, there is no risk of magnetic interaction problems.
Both dry and mercury wetted switches are available in a range of confi gurations and coil voltages. The switches in the 2 Form A version are vertically stacked so the relay requires the same board area as the 1 Form A type.
A special 1 Form A, 5 Volt version is available with an even higher coil resistance of 3000 ohms. This is particularly suited to applications such as battery powered portable equipment as it requires a coil current of only 1.7 mA. This part, the 101-1-A-5/17 or 17D has the advantage of a lower level of thermal EMF of 3 microvolts or less.
Other special parts are also available that may be operated from 3 Volt logic.
| Pickering Electronics | |
|---|---|
| Product Category | Electromechanical Relays |
| Product Number | 101-1-A-12/6 |
| Product Name | Series 101 |
| Relay Type | General; Reed Relay |
| Mounting | PCBoard |
| Poles | Single Pole (SP) |
| Throw | Single Throw |
| Features | Mercury Wetted Contacts |
