The Series 101 is a CMOS drive SIL/SIP reed relay designed for direct interface with 74HC or HCT logic without external drivers. It features an internal mu-metal magnetic screen allowing side-by-side stacking on 0.3 inch (7.6 mm) pitch, and is available in 1 Form A, 1 Form B, 2 Form A, or 1 Form C configurations. The 101-1-A-12/4 variant has a 12 V coil with a resistance of 6000 Ω, employs a high-voltage dry switch (Switch No. 4) rated for 1.2 A carry current and 200 V, with an insulation resistance greater than 10¹² Ω and contact resistance of 0.15 Ω. It supports operate and release times of 1.0 ms and 0.75 ms respectively, and is encapsulated in a plastic package with dry switch contacts capable of switching up to 20 W at 1.2 A for 12 V coils. Capacitance across the open switch is 0.1 pF.
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-12/4 |
| Product Name | Series 101 |
| Relay Type | General; Reed Relay |
| Mounting | PCBoard |
| Poles | Single Pole (SP) |
| Throw | Single Throw |
| NO | 1 |
