MRS
plate-shaped high precision metal film resistor
applications and ratings
Absolute Absolute
Maximum Maximum
Working Overload
Resistance Range (Ω)
T.C.R.
(ppm/°C)
Max.
Rated
Operating
Power
Rating
Type
Ambient Temperature
Temperature
A: ±.05% B: ±.1% C: ±.25% D: ±.5%
E24/E96 & 25, 50 *10n
T: ±.01% Q: ±.02%
Range
E96
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E96
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Voltage
Voltage
Y: ±5
100-250k 100-250k 100-250k 100-250k
100-250k 100-510k 30-510k 30-510k
100-250k 100-510k 10-510k 10-510k
100-510k 100-510k 100-510k 100-510k
MRS1/8
MRS1/4
MRS1/3
0.125W T: ±10
E: ±25
200V
400
Y: ±5
-55°C
to
+125°C
0.25W
0.3W
T: ±10
E: ±25
100-510k 100-1M
100-510k 100-1M
30-1M
10-1M
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30-1M
10-1M
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250V
200V
+70°C
500
S: ±2.5 100-100k 30.1-100k 30.1-100k 30.1-100k
Y: ±5
100-100k 30.1-100k 10-100k 10-100k
100-100k 30.1-100k 10-100k 10-100k
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T: ±10
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* MRS1/3 is available only in E96 series.
environmental applications
Derating Curve
Surface Temperature Rise
100
100
80
75
50
60
40
MRS1/8
MRS1/4
25
0
20
0
-60 -40 -20
-55
0
20
40
60
80 100 120
125
140
0
25
50
75
100
70
Ambient Temperature
% Rated Power
(°C)
Performance Characteristics
Parameter
Test Method
Requirement ∆ R ±(% + 0.05Ω)
Within specified
Resistance
25°C
+25°C/+65°C
tolerance
Within specified
T.C.R.
T.C.R.
Overload (Short time)
±0.05%
Rated voltage x 2.5 or max. overload voltage whichever is lower, for 5 seconds
350°C ± 10°C, 3.5 seconds ± 0.5 second
±0.1%: MRS1/8, 1/4
±0.05%: MRS1/3
Resistance to Soldering Heat
±0.1%: MRS1/8, 1/4
±0.05%: MRS1/3
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
Rapid Change of Temperature
Dielectric Withstanding Voltage
Endurance at 70°C
±0.5%: MRS1/8, 1/4
±0.05%: MRS1/3
±0.1%: MRS1/8, 1/4
±0.05%: MRS1/3
500V (a.c.) for 1 minute between terminals and coatings
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
10,000MΩ and more
Moisture Resistance
Insulation Resistance
40°C ± 2°C, 90 ~ 95% RH, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle
500V (d.c.) for 1 minute
No abnormality in appearance.
Marking shall be easily legible.
Resistance to Solvent
Soaking in 2-propanol of +20°C~25°C for 180 seconds ± 10 seconds
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
130
KOA Speer Electronics, Inc. • 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com
KOA [ KOA SPEER ELECTRONICS, INC. ]
