Global Sources
EE Times-Asia
Stay in touch with EE Times Asia
EE Times-Asia > Amplifiers/Converters

Surge protective device controls surges in excess of 10kA

Posted: 16 Apr 2014 ?? ?Print Version ?Bookmark and Share

Keywords:Bourns? surge protective device? data line?

Bourns, Inc. has launched a surge protective device for signal and data line applications, supporting working voltages of 5V, 12V, and 24V.

The Bourns Model 1840 is a heavy-duty multi-stage protector designed to safeguard sensitive electronic circuits and components from damaging surge voltages and currents. It features fast response and low clamping voltages, suitable for applications in computer, data communication, instrumentation, broadcasting and industrial controls.

The device may be used directly with RS-232, RS-422, RS-423 and RS-485 standard EIA interfaces as well as with 4-20mA and 50mA instrumentation loops.

"Bourns designed our new surge protective device to shield signal and data lines from multiple destructive surge currents in excess of 10,000A on an 8/20?S waveform to deliver reliable protection for sensitive electronics," said Kurt Wattelet, Product Line Manager at Bourns, Inc.

Surge protective device

The device works by intercepting the leading edge of a surge within a sub-nanosecond response time. Within micro-seconds thereafter, a primary stage, three-electrode common-chambered Gas Discharge Tube (GDT) activates and crowbars the majority of the surge energy to ground.

It also utilises the company's TBU High-Speed Protector (HSP) technology as a key second stage. Currents exceeding 300mA through the protector will cause the TBU HSP to quickly transition into high impedance, isolating any harmful voltages and/or currents from damaging the protected equipment.

The GDT protector remains in the crowbar state until the surge has passed and line voltages return to safe levels. After an event, the TBU HSP automatically restores the line to normal operation by automatically resetting to a low impedance state.

The device features vibration-resistant screw-type clamp terminals and convenient mounting and grounding is possible to any flat surface or to DIN-1 (TS-32) or DIN-3 (TS-35) rails. It also has a flame-resistant epoxy-filled housing and cable shields are passed through and may be grounded or arc-protected to ground.

The device is available at $120 each through catalogue distribution.

Article Comments - Surge protective device controls sur...
*? You can enter [0] more charecters.
*Verify code:


Visit Asia Webinars to learn about the latest in technology and get practical design tips.

Back to Top