ROD RESISTORS general specificationsStandard Resistance: 50 OhmsTolerance: 1%, 2%, and 5%Resistance Range: 10 – 300 OhmsResistive Material: Nichrome (NiCr)TCR: ±100ppm/℃Substrate Material: BeO (Beryllium Oxide), Alumina and AlN (Aluminum Nitride)Operating Temperature: -65 C to +175 CTerminals: Tin, Gold, or Silver If you don’t see what you’re looking for, please email us at alen@electro-photonics.com and we may be able to help you. MECHANICAL OUTLINE POWER DERATING ROD RESISTORS Part NumberO.D. ± 0.004L ± 0.010T ± 0.015Power (W)Material R040 – 157B0.040 [1.02]0.157 [3.98]0.035 [0.90]5BeO R040 – 205A0.040 [1.02]0.205 [5.20]0.040 [1.02]5Alumina R063 – 250B0.063 [1.60]0.250 [6.35]0.063 [1.60]10BeO R079 – 275B0.079 [2.00]0.275 [6.98]0.047 [1.19]20BeO R0118 – 354B0.118 [2.99]0.354 [8.99]0.079 [2.00]25BeO ORDERING INFO R040–157B–50–5G 123456 Product Code with Outside DiameterLengthSubstrate MaterialResistance (Ohm)ToleranceTerminal Plating In milsIn milsA = Alumina B = BeO N = AlN XXX1 = +/- 1% 2 = +/- 2% 5 = +/- 5% No letter = Tin over Nickel S = Silver G = Gold