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Author Topic: current limiting resistors fo ne - 58 / 45 indicator bulbs  (Read 6170 times)

Offline nixie

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current limiting resistors fo ne - 58 / 45 indicator bulbs
« on: November 04, 2003, 10:59:00 pm »
Hi, does anyone know whether ne 58 and ne 45 glow bulbs have built in current limiting resistors?

thanks,

jon
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Offline Alan Franzman

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current limiting resistors fo ne - 58 / 45 indicator bulbs
« Reply #1 on: November 06, 2003, 06:00:00 pm »
The NE-45 (=B7A) contains a 30k resistor for use at 100-125 VAC.

The NE-58 (=F4A) contains a 100k resistor for use at 220-250 VAC.

For use at higher voltages, add resistance to keep lamp current at rated 2.0mA.

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