New screening option for Pickering’s Series 67/68 10kV high voltage reed relays minimize noise between the coil drive and high voltage circuits

Pickering Electronics, the reed relay company which has pioneered miniaturization and high performance for over 55 years, now offers optional electrostatic shielding for its 10kV stand-off Series 67/68 SIL/SIP reed relay families. Electrostatic screening protects against noise which can otherwise occur between the coil drive and high voltage circuits. This new screening is in addition to Pickering’s internal mu-metal screen which eliminates magnetic interaction when devices are closely stacked.

Series 67 and 68 high voltage reed relays are constructed using a leadframe in a Single-in-Line format and feature former-less coils which means that they can be housed in a

smaller package than is usual for this type of device, that measures just 58.4 x 12.6 x 14.5mm. Series 67 relays feature PCB connections to switch and coil and provide the highest power switch capability in the Pickering portfolio – up to 200W . Series 68 devices have PCB connections to coil and flying leads to the switch which keeps high voltage away from the PCB. Configurations include:

• 1 Form A SPST up to 10kV stand-off, 7.5kV switching at 50W (max);
• 1 Form A SPST up to 8kV stand-off, 6kV switching at 200W (max);
• 1 Form C SPDT up to 5kV stand-off, 2.5kV switching at 100W (max);
• 5, 12 or 24V coils are available with the option of an internal diode across the coil connections

Commented Kevin Mallett, Technical Specialist at Pickering Electronics: “Pickering continuously looks to improve our product offering. Electrostatic screening adds a new level of protection, ensuring our relay families provide the optimum performance for high voltage applications.”

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Pickering Electronics’ Series 104 for up to 4 kV stand-off voltage now includes electrostatic screen option, helping minimize noise between the coil drive and high voltage circuits.

Pickering Electronics, the reed relay company which has pioneered miniaturization and high performance for over 50 years, has launched a new variant of its high voltage Series 104 SIL/SIP reed relay family with optional electrostatic shielding between the switch and the coil to help minimize noise between the coil drive and high voltage circuits. This new screening is in addition to Pickering’s internal mu-metal screen which eliminates problems that would otherwise be experienced due tomagnetic interaction when devices are closely stacked.

Series 104 reed relays are ideal for such applications as mixed signal semiconductor testers, renewable technologies such as solar or ev battery testing, transformer or cable testing or any other automatic test equipment where high voltages are involved. Where mains voltages are switched, for example to control and isolate S.C.R. or triac gates, they are the ideal choice.

Four types of dry switches are available, capable of standing-off 1.5, 2, 3 and 4kV DC – another new introduction. The 3kV & 4kV versions have an increased clearance between the switch and coil pins to accommodate the higher voltage. Even higher voltage ratings are available to special order. Mercury wetted devices are also available for applications where bounce free switching is required. These latter devices are rated at 1500V DC minimum stand-off, 500VDC switching at up to 50W.

These miniature devices stack on a 6.35mm pitch, can feature one or two switches in a single package and are available in 1 Form A, 2 Form A & 1 Form B configurations with 5 V, 12 V or 24 V coils and optional internal diode.

Commented Kevin Mallett, Technical Specialist at Pickering Electronics: “Our miniature high voltage reed relays continue to be the perfect solution in existing and new high voltage applications, and adding the option of an electrostatic shield to minimize noise between the signal and control circuitry provides extra protection where required”

Further parts with electrostatic shielding reed relays are planned for launch early in 2023.

Highest quality switches with sputtered ruthenium contacts suit low level ‘dry’ switching stand-off; mu metal screening to enable close stacking.

Pickering Electronics has launched the Series 100 HC high power SIL/SIP reed relay that is rated for 1A switching at up to 40W and up to 3A continuous carry current. Featuring the highest quality instrumentation-grade switches with sputtered ruthenium contacts, Series 100 HC relays are suitable for low level or ‘dry’ switching applications.

Commented Kevin Mallett Technical Specialist at Pickering Electronics: “The Series 100HC offers over double the coil resistance of other similar products and the continuous carry current specification of 3 Amps can be increased in pulsed current applications.”

Pickering Electronics, announces the Series 100HV high voltage SIL/SIP reed relays rated for up to 3kV stand-off voltage and with more than double the coil resistance of previous devices.

This suits them for applications such as transformer or cable testing or any other automatic test equipment where high voltages are involved but where low coil power consumption is required.

The Pickering 100 and 101 Series are a complete range of Single-in- Line (SIL) reed relays featuring low thermal EMF and primarily intended for direct drive from CMOS logic IC’s. The 100 series can be driven directly from 4000B CMOS or NMOS logic or similar low current sources, in addition, the mercury wetted relays in the range may be driven directly from TTL logic.

The 101 series is designed to be driven direct with 5V 74HC or 74HCT logic without the need for additional drivers, this can help save valuable board space.

Pickering employs many years of know-how and experience in the design and construction of their reed relays, features such as formerless coil construction allow the coil to be wound directly onto the glass envelope containing the reed switch, this maximises magnetic efficiency and allows the use of less sensitive reed switches resulting in optimal switching action and extended lifetime at operational extremes.

HIGH VOLTAGE RELAYS

New Series 67 1 Form C High Voltage PCB Relay

• PCB Mounting with option of flying lead switch connections
• Robust tungsten plated vacuum switches
• Plastic package with internal mu-metal magnetic screen
• Ideal for cable and transformer test or other high voltage applications

Pickering Electronics are pleased to announce the new changeover 1 Form C version of our popular Series 67 high voltage PCB relay that saves space and makes design simple.

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Interactive datasheets revealed – packed with more information – clear and easy to read.

Pickering Electronics has completely revamped the datasheets of its entire range of reed relays, providing more information in a clearer format with interactive links to further useful content.

New information includes additional environmental specs, mechanical characteristics and relay weights, plus RF plots for coaxial relays, showing VSWR, isolation and insertion loss. Instead of being ‘squashed’ onto two pages – a legacy of printed datasheets – the specifications and relay details are more clearly laid out, especially the mechanical drawings.