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Optoelectronics/Displays??

Lamp-based LEDs to replace incandescent bulbs

Posted: 02 Jun 2006 ?? ?Print Version ?Bookmark and Share

Keywords:Data Display Products? DDP. lamp-based LED? LED? LS series?

Lamp-based LEDs

Data Display Products (DDP) has developed a series of lamp-based LEDs that feature built-in shunt resistors to reduce unwanted illumination caused by leakage current. Well-suited for industrial environments, power generation, transmission, and distribution applications, DPP said the LS Series is designed to be a direct replacement for incandescent bulbs. The devices promises a lifetime of more than 100,000 hours, shock and vibration resistance, low heat and low power consumption.

"Burned-out incandescent bulbs can create safety concerns, require costly maintenance and repair, and result in significant downtime," said Tony Toniolo, DDP President. "Our LED lamps provide many years of high reliability, maintenance-free operation. DDP engineers designed-in shunt resistors to our products specifically for the unique environments they operate in."

According to Toniolo, there are several potential sources of leakage current in a typical circuit, including transient voltage from a relay or discharge from a capacitor. Certain PLCs may supply up to 5mA of leakage current in the 'off' state. Because LEDs are so efficient, a current as low as 0.25mA can cause an LED to illuminate. The new products incorporate parallel shunt resistors to bleed off residual current in the circuit that could otherwise cause a false 'on' indication.

DDP incandescent light replacement solutions are available in either standard or custom assemblies. Pricing for a standard 9mm MB LED lamp starts at $11. Samples are available from DDP with a lead-time of stock to one week.




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