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Old 13th October 2002, 12:10 AM   #1
diyAudio Member
Join Date: Jan 2002
Location: Tyrone Ga. U.S.A.
Default Resistor Question

I found a couple of resistors I don't know the power rating on
they are marked RN75C and made by ACI. Could some one
enlighten me on the RN75C rating.

Thanks in advance,

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Old 13th October 2002, 02:22 AM   #2
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Location: Michigan
Hi Bob,

Heres a link to the Vishay/Dale data sheet for RNx resistors. It has what youre looking for. These are metal film, mil-spec resistors.

Rodd Yamas***a
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Old 13th October 2002, 12:37 PM   #3
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Thanks for the link. It did answer all my questions.

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Old 27th December 2005, 01:00 AM   #4
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(New-Old Thread)

I too have aquired some RN75c 's , but that Dale/Vishay link is dead, and could not find any info on wattage.

What is the method for testing resistor wattage?

I have some:
"IRC" MEF1% RN75c 27.4k (watts??)

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Old 27th December 2005, 01:19 AM   #5
poobah is offline poobah  United States
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RN75 = 1.5Watt @70 deg C, 1.0Watt @ 125 deg C,
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Old 27th December 2005, 01:36 AM   #6
Tweeker is offline Tweeker  United States
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Resistors, Fixed, Film, Nonestablished Reliability, Established Reliability, and Space Level, Style RNC75

6.3 Power rating at 70C. Resistors furnished to this specification have completed 2,000 hours of testing at 70C and power rating of 2.0 watts; however, the failure rate level specified is established at 1 watt at 125C. User should consider the FR level as assigned only to the 125C temperature.
Be sure your foil hat has a good low impedance ground.
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