50 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. 12/20/10
NPR
surface mount molded current sense resistor
features
•Surface mount power resistors
•Flame retardant type (UL94V0)
•Current detecting resistors for power supplies, etc.
•Metal plate terminals
•Marking: Black body color with teal marking
•Products with lead-free terminations meet EU RoHS
requirements. EU RoHS regulation is not intended for
Pb-glass contained in electrode, resister element and glass.
ordering information
F: ±1%
J: ±5%
K: ±10%
T: Sn
(Other termination
styles may be
available, please
contact factory
for options)
±1%: 3 significant figures + 1 multiplier
“R” indicates decimal point <100Ω
±5%, ±10%: 2 significant figures + 1
multiplier
“R” indicates decimal point <10Ω
All values <0.1Ω regardless of tolerance
use “L” as decimal
Ex: 91mΩ = 91L
3.9mΩ = 3L9
1
2
NPR1- TE: 7"
embossed plastic
(1,000 pieces/reel)
NPR2-
TEB: 13"
embossed plastic
(1,000 pieces/reel)
NPR
Type Power
Rating Nominal
Resistance Tolerance
Termination
Material Packaging
New Part # 1 TE 100 JT
For further information on packaging,
please refer to Appendix A.
dimensions and construction
W
t
L
a
b
cc Molded
Resin Resistive
Element
Electrode
.472±.02
(12.0±0.5) .315±.012
(8.0±0.3) .157±.02
(4.0±0.5) .157±.012
(4.0±0.3) .059±.02
(1.5±0.5)
NPR1
NPR2
cbatWL
Dimensions inches (mm)
.295±.02
(7.5±0.5) .177±.012
(4.5±0.3) .079±.012
(2.0±0.3) .051±.012
(1.3±0.3)
.118±.02
(3.0±0.5)
.055±.012
(1.4±0.3)
.098±.012
(2.5±0.3)
Size
Code
EU
resistors
51
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. 12/20/10
NPR
surface mount molded current sense resistor
Absolute
Maximum
Overload
Voltage
Absolute
Maximum
Working
Voltage
Part
Designation
Rated
Ambient
Temperature
Operating
Temperature
Range
Power
Rating
applications and ratings
T.C.R.
(ppm/°C)
Max.
Resistance Range
E-24
(F±1%) (J±5%) (K±10%)
NPR1
NPR2
1W
2W
350V
500V
700V
1000V +70°C -55°C
to
+180°C
±100: R≥0.1Ω
±200: R<0.1Ω0.1Ω - 10MΩ
10mΩ - 22MΩ
3.9mΩ - 9.1mΩ
Derating Curve Surface Temperature Rise
environmental applications
% Rated Power
100
80
60
40
20
-60 -40 -20 0 406080100180
70
20
Ambient Temperature
(°C)
0
-55
120 140 160
150
100
50
NPR2
0
Temperature Rise
(°C)
25 50 75 100
% Rated Power
0
2
1
Hot
Spot
1
NPR1 1
NPR2
2
NPR1
Solder
Joint
2
Performance Characteristics
Parameter
Requirement ∆R ±%
Limit Typical Test Method
Resistance
T.C.R.
25°C
+25°C/+125°C
Within regulated
tolerance
Within specified
T.C.R.
—
—
Overload Rated voltage x 2.5 for 5 seconds
±1.0% ±1.0%
Resistance to Solder Heat 260°C ± 5°C, 10 seconds ± 1 second
±1.0% ±1.0%
Rapid Change of Temperature -40°C (30 minutes), +155°C (30 minutes), 5 cycles
±1.0% ±1.0%
Moisture Resistance 40°C ± 2°C, 90 - 95% RH, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle
±2.0% ±1.5%
Endurance at 70°C 70°C ± 2°C, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle
±2.0% ±0.5%
Low Temperature Operation -55°C, 1 hour
±0.5% ±0.25%
resistors
