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Dual-In-Line (DIL/DIP) series 97 - 98

All Pickering Reed Relays feature the highest quality instrumentation grade reed switches making them suitable for the most demanding applications.

Diodes are optional. Two ranges of DIL (DIP) reed relays featuring internal mu-metal magnetic screens.

Pickering Series 97

Dual-in-Line Reed Relays

SoftCenter™ construction
• Encapsulated in a plastic package with internal mu-metal magnetic screen
• Wide range of switch configurations - 1 Form A, 1 Form B, 2 Form A, 1 Form C
• Many benefits compared to industry standard relays. Learn more here >.
• Dry and mercury wetted switches are available with the same pin configuration and footprint
• 5, 12 and 24 Volt coils are standard, with or without internal diode

The Series 97 is a range of reed relays with pins in the popular Dual-in-Line format.

Being encapsulated in a plastic package using a very high resistivity epoxy resin gives the device several advantages over the more usual moulded construction. The reed switches are not subjected to the high temperatures and pressures of the transfer moulding process with the inherent risk of damage to the sensitive glass to metal seals. The construction incorporates a mu-metal wrap around the operating coil to eliminate magnetic interaction problems.

Higher drive levels are achieved, allowing a full range of switching configurations including 1 or 2 Form A (energize to make), Form C (change-over) and Form B (energize to break) in both dry and mercury wetted types.

If higher coil resistance levels are required, please look at our Series 98 DIL relays which may be driven directly from 74HC or 74HCT CMOS logic.

A useful tip
If there is a chance that you might want to use mercury wetted relays instead of dry relays at a later date, for example to increase switch ratings, lay out the PCB initially as though for the mercury wetted type with pins 1 and 14 uppermost. This allows uprating later without PCB changes. The mercury versions in the Series 97 have identical pin configurations to the dry types.

Pickering Series 98

CMOS Drive DIL Reed Relays
Direct drive from 74HC or HCT

SoftCenter™ construction
• Pin compatible with standard DIL relays
• Board space may be saved by eliminating drivers
• Encapsulated in a plastic package with internal mu-metal magnetic screen
• Wide range of switch configurations - 1 Form A, 1 Form B, 2 Form A, 1 Form C
• Many benefits compared to industry standard relays. Learn more here >.
• Form A (energize to make) or Form B (energize to break) configurations
• Dry and mercury wetted switches are available with the same pin configuration and footprint
• 5, 12 and 24 Volt coils are standard, with or without internal diode

The Pickering Series 98 is a range of Dual-In-Line relays, electrically equivalent to the Series 101 CMOS drive, Single-In- Line types, but pin compatible with standard DIL relays. The range features very high coil resistances, the 5 volt dry devices may be driven directly from 74HC or 74HCT logic without the need for additional drivers. Naturally, high resistance 12 and 24 volt coils are also available in this series.

74HC logic will drive up to 4mA at 5 volts which means that a nominal coil resistance of 1600 ohms is required to avoid running
the IC at its maximum rating; 1600 ohms is the coil resistance of the single pole dry Series 98. A special model with an even higher coil resistance of 3000 ohms is also available, our type number 98-1-A-5/17D (the D suffix indicates an internal diode).

It is often possible to replace TTL ICs with their equivalent CMOS ones and replace standard DIL relays with Pickering Series 98, to obtain the benefits of CMOS without any circuit or PCB redesign.

The range like its SIL equivalent has an internal mu-metal screen to enable high packing density with negligible interaction between adjacent devices.

A useful tip
If there is a chance that you might want to use mercury wetted relays instead of dry relays at a later date, for example to increase switch ratings, lay out the PCB initially as though for the mercury wetted type with pins 1 and 14 uppermost. This allows uprating later without PCB changes. The mercury versions in the Series 98 have identical pin configurations to the dry types

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