MRA Datasheet, PDF (1/3 Pages) Ohmite Mfg. Co. – Power dissipation up to 2W

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MRA
Vishay Mills
Wirewound Resistors, Non-Magnetic,
Non-Inductive, Axial Lead
FEATURES
• High temperature coating (> 350 °C)
• Non-magnetic and all welded constructions
greatly enhance frequency response.
Combined with non-inductive Ayrton-Perry
winding the inductive reactance and signal loss
are almost totally eliminated.
• Ideal for Audio Industry
• Material categorization: For definitions of
compliance please see www.vishay.com/doc?99912
STANDARD ELECTRICAL SPECIFICATIONS
GLOBAL
MODEL
HISTORICAL
MODEL
POWER RATING ⁽¹⁾
P_{25 °C} W
CHARACTERISTIC U + 250 °C
POWER RATING ⁽¹⁾
P_{25 °C} W
CHARACTERISTIC V + 350 °C
TOLERANCE ⁽²⁾
%
RESISTANCE
RANGE

MRA-05
MRA05
4.0
5.0
1, 5, 10
0.01 to 15.0K
MRA-10
MRA10
7.0
10.0
1, 5, 10
0.05 to 35.0K
MRA-12
MRA12
10.0
12.0
1, 5, 10
0.05 to 85.0K
Notes
(1) _{Vishay Mills MRA models have two power ratings depending on the operation temperature and stability requirements.}
(2) _{Other tolerances may be available, contact factory}
WEIGHT
(typical)
g
1.00
3.87
5.02
TECHNICAL SPECIFICATIONS
PARAMETER
UNIT
Temperature Coefficient
ppm/°C
Terminal Strength
lb
Dielectric Withstanding Voltage
V_AC
Operating Temperature Range
°C
Maximum Working Voltage
V
MRA RESISTOR CHARACTERISTICS
± 30 for 10  and above; ± 50 for 1.0  to 9.9 ; ± 90 for 0.5  to 0.99 
10 minimum
500 for MRA-05 and 1000 for MRA-10 and MRA-12
Characteristic U = - 65 to + 250, Characteristic V = - 65 to + 350
(P x R)^1/2
GLOBAL PART NUMBER INFORMATION
Global Part Numbering example: MRA-1225R00JE12 (visit www.vishay.net Vishay Dale parts numbering manual for all options)
MRA
-
1
2
2
5
R
0
0
J
E
1
2
GLOBAL MODEL
(6 digits)
(See Standard Electrical
Specifications Global
Model column
for options)
VALUE
(5 digits)
R = Decimal
K = Thousand
1R500 = 1.5 
1K500 = 1.5 k
TOLERANCE
(1 digit)
F = ± 1.0 %
J = ± 5.0 %
K = ± 10.0 %
Historical Part Number example: MRA12W25R0J
MRA12
W = STANDARD
HISTORICAL MODEL
TC
PACKAGING CODE
(3 digits)
E07 = Tape/reel (MRA-10, MRA-12)
E48 = Tape/reel (MRA-05)
E12 = Bulk, up to 100 pc boxes
SPECIAL
(up to 2 digits)
(Dash Number)
From 1 to 99
as applicable
25 
RESISTANCE VALUE
5%
TOLERANCE
Revision: 02-May-12
1
Document Number: 31801
For technical questions, contact: [e-mail]
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000