The Series 101 is a CMOS drive SIL/SIP reed relay family designed for direct operation from 74HC or HCT logic without external drivers. The 2 Form A variant, including the 101-2-A-12/2, features a vertically stacked contact arrangement that occupies the same board area as a single pole relay. It has a 12 V coil with a resistance of 3000 Ω, is encapsulated in a plastic package with an internal mu-metal magnetic screen to prevent magnetic interaction, and supports switching up to 2 A at 50 W with mercury wetted contacts. The relay is available in dry or mercury wetted switch options, with insulation resistance exceeding 10¹² Ω and typical capacitance of 0.1 pF across open contacts. It operates with a typical time of 1.0 ms and offers 10⁸ operation life at rated load. Mounting is on 0.3 inch (7.6 mm) pitch.
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 | 101-2-A-12/2 |
| Product Name | Series 101 |
| Relay Type | General; Reed Relay |
| Mounting | PCBoard |
| Poles | Double Pole (DP) |
| Throw | Single Throw |
| NO | 1 |
