The following equation may be used to determine the DC (Direct Current) or AC (Alternating Current)

(RMS, root mean square value) of normal rated power. However, if the result value exceeds the

highest current of regulated standards (paragraph 5), the highest normal rated power is to be used.

RoHS

SURFACE MOUNT RESISTORS

LRMA Series: Metal Alloy, Very Low Resistance

POWER DERATING CURVE

The Operating Temperature Range : -55ºC ~ +170ºC

For resistors operated in ambient temperature above 70ºC, power rating must be derating in

accordance with the curve below.

RATING CURRENT

I =

P/R

I = Rating Current (A)

P = Rating Power (W)

R = Resistance (Ω)

MARKING FORMAT

• All the other products marking are 4 digits

• “R” designates the decimal location in ohms

e.g. 1mΩ=R001, 25mΩ=R025, 100mΩ=R100

• “m” designates the decimal location in milli-ohms

e.g. 0.25mΩ=0m25, 0.5mΩ=0m50, 25.5mΩ=25m5

• 0Ω marking as 0R

Page 5 of 9

RFE International • Tel:(949) 833-1988 • Fax:(949) 833-1788 • E-Mail Sales@rfeinc.com

Ambient Temperature (ºC)

2022.03.23