3 significant
figures + 1 multiplier
“R” indicates decimal
on values <100Ω
Nominal
Resistance
1002
features
•Ultra precision T.C.R. up to ±2.5 ppm/°C,
tolerance to ±0.01%
•Wide resistance range from 10Ω to 1MΩ
•Marking: Black body color with laser marking
•Products with lead-free terminations meet EU RoHS
and China RoHS requirements
MRS
plate-shaped high precision metal film resistor
dimensions and construction
Solder
Electrode
L
D
Substrate
Film
Outer
Coating
Lead
Frame
h
H
P
.020
(0.5)
.010±.020
(0.25±0.5)
L (max.)
MRS1/8 .220
(5.6) .118±.02
(3.0±0.5) .244
(6.2)
.295
(7.5)
MRS1/4
.315±.079
(8.0±2.0) .354
(9.0)
.100±.008
(2.54±0.2)
.200±.008
(5.08±0.2)
.150±.008
(3.81±0.2)
MRS1/3
Type D (max.) PHh (max.)
Dimensions inches (mm)
.098
(2.5)
ordering information
T: ±0.01%
Q:±0.02%
A: ±0.05%
B: ±0.1%
C: ±0.25%
D: ±0.5%
1/8: 0.125W
1/4: 0.25W
1/3: 0.3W
Please contact
factory for other
available
terminations
S: ±2.5
Y: ±5
T: ±10
E: ±25
MRS 1/3 S
T.C.R.
(ppm)
Product
Code Size Resistance
Tolerance
Lead Free T
D: SnAgCu
Terminal Surface
Material
D
EU
resistors
129
KOA Speer Electronics, Inc. • 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use. 1/19/11
MRS
plate-shaped high precision metal film resistor
Absolute
Maximum
Overload
Voltage
Absolute
Maximum
Working
Voltage
Type Operating
Temperature
Range
Rated
Ambient
Temperature
Power
Rating
applications and ratings
T.C.R.
(ppm/°C)
Max.
Resistance Range (Ω)
––
––
––
––
––
––
100-100k
100-100k
100-100k
Y: ±5
T: ±10
E: ±25
Y: ±5
T: ±10
E: ±25
S: ±2.5
Y: ±5
T: ±10
0.125W
0.25W
0.3W
200V
250V
200V
400
500
MRS1/8
MRS1/4
MRS1/3
+70°C -55°C
to
+125°C
Derating Curve
environmental applications
% Rated Power
100
80
60
40
20
-60 -40 -20 0 406080100140
70
20
Ambient Temperature
(°C)
0
-55 120
125
Performance Characteristics
T: ±.01%
E96
––
––
––
––
––
––
30.1-100k
30.1-100k
30.1-100k
Q: ±.02%
E96
100-250k
100-250k
100-250k
100-510k
100-510k
100-510k
30.1-100k
10-100k
10-100k
A: ±.05%
100-250k
100-510k
100-510k
100-510k
100-1M
100-1M
30.1-100k
10-100k
10-100k
B: ±.1%
100-250k
30-510k
10-510k
100-510k
30-1M
10-1M
––
––
––
C: ±.25%
100-250k
30-510k
10-510k
100-510k
30-1M
10-1M
––
––
––
D: ±.5%
Surface Temperature Rise
Temperature Rise
(°C)
100
75
50
25
25 50 75 100
% Rated Power
MRS1/8
0
0
MRS1/4
resistors
130 KOA Speer Electronics, Inc. • 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use. 11/29/11
Parameter Requirement ∆ R ±(% + 0.05Ω) Test Method
Resistance
T.C.R.
25°C
+25°C/+65°C
Within specified
tolerance
Within specified
T.C.R.
Overload (Short time) Rated voltage x 2.5 or max. overload voltage whichever is lower, for 5 seconds
±0.05%
Resistance to Soldering Heat 350°C ± 10°C, 3.5 seconds ± 0.5 second
±0.1%: MRS1/8, 1/4
±0.05%: MRS1/3
Rapid Change of Temperature MRS1/8, 1/4: -55 +0-5°C (30 minutes), +125 +3-0°C (30 minutes), 5 cycles
MRS1/3: -55 +0-5°C (30 minutes), +125 +3-0°C (30 minutes), 50 cycles
±0.1%: MRS1/8, 1/4
±0.05%: MRS1/3
Moisture Resistance 40°C ± 2°C, 90 ~ 95% RH, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle
±0.1%: MRS1/8, 1/4
±0.05%: MRS1/3
Endurance at 70°C 70°C ± 2°C, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle
±0.1%: MRS1/8, 1/4
±0.05%: MRS1/3
500V (a.c.) for 1 minute between terminals and coatingsDielectric Withstanding Voltage
±0.5%: MRS1/8, 1/4
±0.05%: MRS1/3
500V (d.c.) for 1 minuteInsulation Resistance 10,000MΩ and more
Soaking in 2-propanol of +20°C~25°C for 180 seconds ± 10 secondsResistance to Solvent No abnormality in appearance.
Marking shall be easily legible.
* MRS1/3 is available only in E96 series.
E24/E96 & 25, 50 *10n