Data Sheet

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DATASHEET
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© Copyright 2017by Conrad Electronic SE.
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3.1. Rated Voltage: 
Itiscalculated throughthefollowing formula: 
whereE:rated voltage ( V )
  P:rated power ( W )

R:nominalresistance value
(
Ω
)
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However, incase thevoltage calculated exceeds the maximum load voltage, such the maximum load
voltage shallberegarded asitsratedvoltage, means whichever
less.
4. Dimensionandstructure:
4.1. Dimension:
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Unit: mm
TYPE L±0.5 D±0.5 H±3 d±0.05 ResistanceRange MaxWorking
RD1/8W,1/6W,(1/4WS) 3.7Max 1.7±0.2 30 0.45
3.9Ω4.7MΩ
200V
RD1/4W(1/2WS) 6.4 2.4 30 0.6
3.9Ω10MΩ
250V
RD1/2W 9 3.5 30 0.65
3.9Ω10MΩ
350V
RDN1W 11 4.5 30 0.8
39Ω10MΩ
500V
RDN2W 15 5.0 30 0.8
3.9Ω10MΩ
750V
@Notes:1. toolowortoohighohmvaluecanbesuppliedonlycasebycase.
 2. MaxOverloadVoltageis2timesofMaxWorkingvoltage
 3. Resistancevalueover4.7MΩ(
≧4.7MΩ),whileRD1/6Wis≧1MΩ.thetoleranceshallbe±10%.
 4. RD1/4W,1/2Wcanalsosupplyflameproofform(RDN)
 5. RDN‐formDielectricWithstanding,pleaserefertoRSNpagesimilarsizecolumn.
4.2. STRUCTURE
4.2.1. CeramicRod:
ItismadeofForsteriteimportedfromJapan.
4.2.2. CarbonFilm:
Underhighvacuumandhightemperaturetosplitandoxidizethepurecarbon‐hydric.
4.2.3. Terminal:
Terminalistobefirmlyconnectedwithresistorselement,bothelectricallyand
mechanically,andalloweasysoldering.
4.2.4. Coating:
CoatingisdonebyEPOXYinsulatingpaintwhichissolidenoughtobefreefromlooseness,crackandeasy
breakage.Thepaintshallbelimitedwithin1mmofleadwiresfromresistorsbodywhiletheratedwattageis
2Wthepaintislimitedwithin2mm.RONtypeiscoatedbyflameproofpaintwhichisresistantto800°C
withoutcausinglooseness,crackandeasybreakage.
4.2.5. Marking: