FILM RESISTORS
MR Series: Metal Film
INTRODUCTION
Metal Film Resistors are designed to provide MIL
performance and reliability at a significantly lower cost.
High grade materials make the much smaller space
saver size available. Automated production assures
uniform quality and low cost.
RoHS
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FEATURES
•Temperature Coefficients: 25, 50, & 100PPM
(1/4 watt standard is 50ppm)
•Tolerance 1%, 0.5%, & 0.1%
•DIN Style 44061
Dimensions
(mm)
DERATING CURVE
70°C
100
Rated Load (%)
80
60
40
20
0
-55
155°C
-30
0
20
40
60
80
100
125 140
160
SPECIFICATIONS
Type
MR12
MR25
MR25M
MR50
MR50M
MR100
MR200
Notes:
MIL
Style
RN50
RN55
RN60
RN65
RN70
Rated Power (W)
125°C
1/16
1/8
1/3
3/4
1
70°C
1/8
1/4
1/4
1/2
1/2
1
2
Body(mm)
L±0.3
3.8
6.5
3.6
9.5
6.3
11
16
D±0.3
1.5
2.5
1.6
3.5
2.5
4.5
5
Lead(mm)
H
20
20
20
20
20
20
20
0.45
0.6
0.5
0.7
0.6
0.8
0.8
Resistance
d±0.05 Range (W)
10-1M
1-10M
10-1M
10-2.4M
5.11-4.7M
5.11-2.4M
5.11-5.11M
Ambient Temperature (°C)
Max. Working Max. Overload
Voltage
Voltage
200
250
200
350
350
500
750
400
500
400
700
700
1000
1000
Standard
tape
T52
T52
T52
T52
T52
T73
T73
Packing
5000
5000
5000
2500
2500
2000
1000
•Flame-Proof (MRF) available on request. Meets Ml1412
•Lower and higher resistances available on request.
•Tolerances below 1% require extra lead-time for proper aging.
•Special tape to tape size by request.
PERFORMANCE CHARACTERISTICS
Test Items
Rated Wattage
W
W
Max Rated Voltage
Vdc or Vrms
Thermic Resistance
K/W
Temperature Resistance
%
Low Temp. Operation
%
Short Time Overload
%
Terminal Strength
%
Dielectric with Standing Voltage
%
Resistance to Soldering: Heat
%
Insulation Resistance - Dry
M
Insulation Resistance - Wet
M
Moisture Resistance
%
Life 1000 Hrs
%
Shock, Medium Impact
%
Vibration, High Freq.
%
Shelf-Life, Per Year
%
Solderability
% area
at 70°C
at 125°C
MIL SPEC
10509
char (D)
char (D)
DIN SPEC
44061
MR12
.16
.1
200
150
±0.20
±0.15
-0.20
-0.10
-0.10
-0.01
10000
100
±0.40
±0.50
±0.10
±0.10
±0.10
95
MR25
.25
.125
250
150
±0.20
±0.15
±0.20
±0.10
±0.10
±0.10
10000
100
±0.50
±1.0
±0.10
±0.10
±0.10
95
SPEC
MR25M MR50
.25
.5
.125
.4
200
350
200
100
±0.30
±0.20
±0.30
±0.15
±0.25
±0.25
±0.10
±0.10
±0.15
±0.10
±0.10
±0.10
10000 10000
100
100
±0.50
±0.50
±0.10
±1.0
±0.10
±0.10
±0.10
±0.10
±0.10
±0.10
95
95
MR50M
.5
.4
350
140
±0.20
±0.15
±0.25
±0.10
±0.10
±0.10
10000
100
±0.50
±1.0
±0.10
±0.10
±0.10
95
MR100
1
.75
500
100
±0.20
±0.15
±0.25
±0.10
±0.10
±0.10
10000
100
±0.50
±1.0
±0.10
±0.10
±0.10
95
MR200
2
1
750
100
±0.20
±0.15
±0.25
±0.10
±0.10
±0.10
10000
100
±0.50
±1.0
±0.10
±0.10
±0.10
95
±0.25
±0.25
±0.25
±0.20
±0.25
±0.10
10000
100
±0.50
±0.50
±0.25
±0.25
95
±0.25
±0.25
±0.5
±0.25
±1.0
±0.25
±0.25
PART NUMBER EXAMPLE
MR 25 R - 100K - F
(1/4 watt is standard 50ppm so no suffix is needed for 50ppm or 100ppm)
PART NUMBER EXAMPLE
(With specified Temperature Coefficient)
MR 25 R - 100K - B25
B25 indicates B tolerances (0.1%), 25ppm temperature coefficient
RFE International
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