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OKI Introduces High Switching Current Reed Switch

This device achieves industry-first 5 A maximum carry current and 2 A maximum switching current with glass tube length of 16.5 mm

High current reed switch, ORD872

TOKYO, October 11, 2013 -- OKI Sensor Device, an OKI Group company that develops, manufactures, and sells reed switches(*1), has introduced the ORD872, a high-current reed switch housed in a glass tube measuring 16.5 mm in length and boasting an industry-first maximum carry current of 5 A and maximum switching current of 2 A. Samples will be available from October 30, with production devices slated to begin shipping by December 1. OKI Sensor Device has set sales targets of 700,000 units for fiscal 2014, ramping up to 6,000,000 units in fiscal 2017. Sales will focus on buyers in the automotive and industrial equipment markets throughout the world.

Since 2006, OKI Sensor Device has produced reed switches with maximum carry current of 2.5 A for controlling LED stop lamps in compact passenger vehicles. Mid-sized and larger automobiles are generally equipped with mechanical switches capable of handling large control currents. However, mechanical switches present various drawbacks, including short service life and contact failures due to dust adhesion. The ORD872 developed by OKI Sensor Device is the world's first reed switch designed for use in mid-sized and larger automobiles. Sealed in a glass tube, the ORD872 features long service life and is capable of withstanding harsh service environments while providing high current switching capabilities equivalent to mechanical switches.

The ORD872 incorporates a new cobalt alloy wire to achieve a maximum carry current(*2) of 5 A and a maximum switching current of 2 A(*3) , both industry-first achievements. It features a glass tube measuring 2.8 mm in diameter and 16.5 mm in length. The ORD872 can handle twice the current of conventional products of the equivalent glass tube length from other companies. Coupled with a projected service life of one million switching operations—equal to the service life of conventional products—the ORD872 sets new standards for reliability and performance.

"We are excited to announce our pioneering new high current reed switch. We are re-defining standards for reliability and performance of reed switches by introducing a new device that is suitable for an impressive range of applications," says Yuki Ushida, President of OKI Sensor Device. "The newly developed ORD872 reed switch is ideal for use including industrial devices that incorporate mercury reed relays(*4) and high-capacity position sensors.(*5) As an alternative to mercury reed relays, the ORD872 also helps reduce environmental burdens."

LEDs consume less power and generate lower environmental impact than conventional incandescent lamps. Use of LEDs in automobile stop lamps and interior lamps has grown in recent years, spurring growing use of long-lived, environmentally-resistant reed switches for LED control. Demand for reed switches for LED control in automobiles is expected to continue growing in the years to come.

The new "ORD872" will be exhibited at electronicAsia 2013 to be held in Hong Kong between October 13 and 1.6.

Sales plan

Product name
Sample shipments begin
October 31, 2013
Sample price
3.00 USD
Mass production begins
December 1, 2013

Main features

Glass envelopeφ2.8-16.5mm, length 44.2mm, reed diameter φ0.6mm
Electrical characteristics
Maximum carry current 5.0A, maximum switching current 0.2A
Contact resistance


  • *1 :Reed switch

    A reed switch consists of a pair of ferrous metal reeds enclosed in a hermetically sealed glass envelope. North and south poles are formed on the reeds upon the application of a magnetic field. The reed switch operates through magnetic attraction. When the magnetism is removed, the reeds return to their original configuration due to the elasticity of the reeds.

  • *2 :Maximum carry current

    This is the maximum current which can be carried at the switching points uninterruptedly without closing or opening the switch. When current exceeds this value, it may cause damage to service life and reliability.

  • *3 :Maximum switching current

    Maximum switching current, a standard current which determines functionality of the switching points, is a maximum current that allows contacts to open and close. It is the maximum value that cannot be exceeded in order to guarantee service life and reliability of the switch.

  • *4 :Mercury reed relay

    Consisting of a mercury switch and magnetizing coil, a mercury reed relay can control large currents.

  • *5 :Position sensor

    Sensors, such as cylinder sensors and rotary sensors that detect position.

About OKI Electric Industry (OKI)

Founded in 1881, OKI Electric Industry is Japan's leading telecommunications manufacturer. Headquartered in Tokyo, Japan, OKI provides top-quality products, technologies, and solutions to customers through its info-telecom systems and printer operations. Its various business divisions function synergistically to bring to market exciting new products and technologies that meet a wide range of customer needs in various sectors. Visit OKI's global website at http://www.oki.com/.

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Press Contact:
Public Relations Division
Phone: +81-3-3501-3835
  • * Information in the press releases is current on the date of the press announcement, but is subject to change without prior notice.

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