F E A T U R E S
S P E C I F I C A T I O N S
• Extremely low resistance and
high precision tolerance
• Low T.C.R. achieved (±50ppm/
°C)
• Flameproof UL94-V-0
• Marking: Black body color with
white marking
TCR max.: ±50 ppm/°C
Rated Ambient Temp: +70°C
Oper. Temp. Range:
-55°C - +125°C
Four-terminal Current
Sense Resistor
Voltage
RW Type
Electrode
Molded
Resin
Resistive
Element
Current
D E R A T I N G
Electrode
L
100
W
e
80
60
40
20
0
t
f
d
g
a
c
b
h
c
Power Resistance
Rating Range
(watts) E-12 (mΩ)
Dielectric
Resistance Withstanding (ppm/°C)
TCR
Type
Tolerance
1%
Voltage
500V
Max.
±50
±50
-55 -40
-20
0
20
40 70 60
80
100
125 140
RW1S0CK
RW2S0DK
1
2
5mΩ - 50mΩ
5mΩ - 50mΩ
Ambient Temperature, °C
1%
500V
T Y P I C A L S C H E M A T I C
S U R F A C E T E M P. R I S E
Input
Detecting
Circuit
125
D I M E N S I O N S inches (mm)
RW2S0DK
RW1S0CK
RW2S0DK
100
L
W
t
a
b
0.425±.02 (10.8±0.5)
0.244±.012 (6.2±0.3)
0.083±.008 (2.1±0.2)
0.118±.012 (3.0±0.3)
0.031±.008 (0.8±0.2)
0.504±.02 (12.8±0.5)
0.323±.012 (8.2±0.3)
0.122±.008 (3.1±0.2)
0.197±.012 (5.0±0.3)
0.039±.008) (1.0±0.2)
R
Output
W
75
Voltage Terminal
(KELVIN terminal)
RW1S0CK
50
c
d
e
f
0.055±.02 (1.4±0.5)
0.047±.02 (1.2±0.5)
0.051±.012 (1.3±0.3)
0.051±.012 (1.3±0.3)
0.197±.004 (5.0±0.1)
0.079±.02 (2.0±0.5)
0.079±.02 (2.0±0.5)
0.087±.012 (2.2±0.3)
0.087±.012 (2.2±0.3)
0.236±.004 (6.0±0.1)
Current Terminal
25
0
L A N D P A T T E R N
g
k
h
j
0.098±.004 (2.5±0.1)
0.39 (10.0)
0.118±.004 (3.0±0.1)
0.47 (12.0)
m
j
0
20
40
60
80
100
k
0.08 (2.0)
0.09 (2.3)
Percent Rated Power
m
n
0.04 (1.0)
0.05 (1.15)
0.12 (3.0)
0.21 (5.3)
o
p
q
r
0.24 (6.0)
0.20 (5.0)
0.06 (1.6)
0.08 (2.0)
0.04 (1.0)
0.31 (8.0)
0.24 (6.0)
0.09 (2.2)
0.13 (3.2)
0.06 (1.6)
n o
s
r
s
p
q
P E R F O R M A N C E C H A R A C T E R I S T I C S
O R D E R I N G I N F O R M AT I O N
Requirement ΔR
Parameter
Limit
Typical
Test Method
RoHS Compliant
Resistance
Within
regulated
tolerance
—
25°C
� ꢀ ꢁ ꢂ ꢃ ꢄ ꢅ � ꢃ ꢃ ꢆ ꢇ ꢈ ꢉ ꢊ
Type &
Ohms
Tolerance
Packaging
T.C.R.
Within
specified
T.C.R.
—
+25°C/-55°C and +25°C/+125°C
Power Rating
R005 = 0.005� F = 1%
T = tape and reel
(optional)
R050 = 0.05�
D = 0.5%
Overload
±1.0%
±1.0%
±1.0%
Rated power x 5 for 5 seconds
Current
Sense
Power Rating
Resistance to
Solder Heat
±1.0%
±0.5%
±0.5%
±0.5%
260°C ± 5°C, 10 seconds
±1 second
Resistor (watts)
Rapid Change of
Temperature
±1.0%
±2.0%
±1.0%
-55°C (30 minutes), +125°C
(30 minutes), 500 cycles
The part itself will be
marked as follows:
ꢄꢂ�ꢁ
ꢁꢃꢋꢌꢍꢎꢋꢏꢌꢐ
Tolerance
Moisture
Resistance
40°C ± 2°C, 90 - 95% RH, 1000
hours, 1.5 hr ON, 0.5 hr OFF cycle
F = 1%
D = 0.5%
Ohms
10m ohms = 0.01�
Endurance at
70°C
70°C ± 2°C, 1000 hours,
1.5 hr ON, 0.5 hr OFF cycle
Low Temperature ±0.5%
Operation
±0.25% -55°C, 1 hour
S TA N D A R D P A R T N U M B E R S A V A I L A B L E
High Temperature ±0.5%
Exposure
±0.25% +125°C, 100 hours
Wattage:
1 watt
2 watt
1%
Tolerance:
1%
0.5%
Ohms
Series: RW1S0CK----FT
RW1S0CK----DT
RW2S0DK----FT
0.00500
0.01000
0.02500
0.05000
RW1S0CKR005FT RW1S0CKR005DT RW2S0DKR005FT
RW1S0CKR010FT RW1S0CKR010DT RW2S0DKR010FT
RW1S0CKR025FT RW1S0CKR025DT RW2S0DKR025FT
RW1S0CKR050FT RW1S0CKR050DT RW2S0DKR050FT
Ohmite Mfg. Co. 1600 Golf Rd., Suite 850, Rolling Meadows, IL 60008 • Tel. 1-866-9-OHMITE • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com