Current Sense Resistor Datasheet
Four-Terminal Surface Mount Resistor
L4CA/C Series
RoHS
Pb
Description
Littelfuse L4CA/C Series Kelvin sensing, low resistance, high
power chip resistors exhibit excellent performance in resistance,
noise performance, surface heat distribution, and have a lower
surface temperature.
Features
■ Resistance range down to 0.5 mΩ
■ Separate voltage sensing terminals
■ Ceramic substrate
Benefits
■ Small size
■ High voltage
Additional Information
Application
■ Power management
■ Low ESL
Resources
Accessories
Samples
1
© 2023 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: BA.03/17/23
Current Sense Resistor Datasheet
Four-Terminal Surface Mount Resistor
L4CA/C Series
Electrical Specifications
LF Seires
Part Number
Size
Inch
Resitance
Power
mm
Ro (mΩ)
Rt (%)
(W)
TCR (ppm/˚C)
Standard
Package Qty
L4CC
L4CC0306RLR001FNR
0306
816
1
±1.0%
0.33
±100
5000
L4CC
L4CC0306RLR002FNR
0306
816
2
±1.0%
0.33
±100
5000
L4CC
L4CC0306QLR005FNR
0306
816
5
±1.0%
0.33
±50
5000
L4CC
L4CC0306QLR006FNR
0306
816
6
±1.0%
0.33
±50
5000
L4CC
L4CC0306QLR007FNR
0306
816
7
±1.0%
0.33
±50
5000
L4CC
L4CC0306QLR008FNR
0306
816
8
±1.0%
0.33
±50
5000
L4CC
L4CC0306QLR009FNR
0306
816
9
±1.0%
0.33
±50
5000
L4CC
L4CC0306QLR010FNR
0306
816
10
±1.0%
0.33
±50
5000
L4CC
L4CC0306QLR011FNR
0306
816
11
±1.0%
0.33
±50
5000
L4CC
L4CC0306QLR012FNR
0306
816
12
±1.0%
0.33
±50
5000
L4CC
L4CC0306QLR013FNR
0306
816
13
±1.0%
0.33
±50
5000
L4CC
L4CC0306QLR014FNR
0306
816
14
±1.0%
0.33
±50
5000
L4CC
L4CC0306QLR015FNR
0306
816
15
±1.0%
0.33
±50
5000
L4CC
L4CC0306QLR016FNR
0306
816
16
±1.0%
0.33
±50
5000
L4CC
L4CC0306QLR018FNR
0306
816
18
±1.0%
0.33
±50
5000
L4CC
L4CC0306QLR020FNR
0306
816
20
±1.0%
0.33
±50
5000
L4CC
L4CC0306QLR021FNR
0306
816
21
±1.0%
0.33
±50
5000
L4CC
L4CC0306QLR022FNR
0306
816
22
±1.0%
0.33
±50
5000
L4CC
L4CC0306QLR024FNR
0306
816
24
±1.0%
0.33
±50
5000
L4CC
L4CC0306QLR035FNR
0306
816
35
±1.0%
0.33
±50
5000
L4CC
L4CC0306QLR050FNR
0306
816
50
±1.0%
0.33
±50
5000
L4CA
L4CA0612L0M50FNR
0612
1632
0.5
±1.0%
1
±150
5000
L4CA
L4CA0612LR003FNR
0612
1632
3
±1.0%
1
±100
5000
L4CA
L4CA0612LR004FNR
0612
1632
4
±1.0%
1
±100
5000
L4CA
L4CA0612LR005FNR
0612
1632
5
±1.0%
1
±50
5000
L4CA
L4CA0612LR006FNR
0612
1632
6
±1.0%
1
±50
5000
L4CA
L4CA0612LR007FNR
0612
1632
7
±1.0%
1
±50
5000
L4CA
L4CA0612LR008FNR
0612
1632
8
±1.0%
1
±50
5000
L4CA
L4CA0612LR009FNR
0612
1632
9
±1.0%
1
±50
5000
L4CA
L4CA0612LR010FNR
0612
1632
10
±1.0%
1
±50
5000
L4CA
L4CA0612LR011FNR
0612
1632
11
±1.0%
1
±50
5000
L4CA
L4CA0612LR012FNR
0612
1632
12
±1.0%
1
±50
5000
L4CA
L4CA0612LR013FNR
0612
1632
13
±1.0%
1
±50
5000
L4CA
L4CA0612LR014FNR
0612
1632
14
±1.0%
1
±50
5000
L4CA
L4CA0612LR015FNR
0612
1632
15
±1.0%
1
±50
5000
L4CA
L4CA0612LR016FNR
0612
1632
16
±1.0%
1
±50
5000
L4CA
L4CA0612LR018FNR
0612
1632
18
±1.0%
1
±50
5000
L4CA
L4CA0612LR020FNR
0612
1632
20
±1.0%
1
±50
5000
L4CA
L4CA0612LR021FNR
0612
1632
21
±1.0%
1
±50
5000
L4CA
L4CA0612LR022FNR
0612
1632
22
±1.0%
1
±50
5000
L4CA
L4CA0612LR024FNR
0612
1632
24
±1.0%
1
±50
5000
L4CA
L4CA0612LR025FNR
0612
1632
25
±1.0%
1
±50
5000
Note: Resistors are available in steps of 1 mOhm. Ratings not indicated in the above table may be available on request.
2
© 2023 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: BA.03/17/23
Current Sense Resistor Datasheet
Four-Terminal Surface Mount Resistor
L4CA/C Series
Temperature De-rating Curve
Storage / Environment Conditions
Products should be stored under the following environmental
conditions.
Rated Power (%)
100
80
Temperature:
+5 to +35 °C
60
Humidity:
45 to 85% relative humidity
40
Moisture Sensitivity
Level: 1, J-STD-020
Do not keep products in environments where they may be subject
to particulate contamination or harmful gases such as sulfuric acid
or hydrogen chloride as it may cause oxidization on electrodes,
resulting poor solderability.
20
0
-55
0
70
40
80
120
155
Ambient Temperature (ºC)
Products should be stored in a space that does not expose to high
temperatures, vibration, or direct sunlight.
Products should be stored in the original airtight packaging
until use.
Soldering Parameters–Wave Soldering
Profile Feature
tP
TP
Critical Zone
TL to TP
Temperature
Ramp-up
TL
tL
T S(max)
Ramp-dow
Ramp-down
Preheat
T S(min)
tS
25
time to peak temperature
Time
3
Pb-Free Assembly
Average Ramp-Up Rate (Tsmax to Tp)
3 ºC / second max
Preheat
Temperature Minimum (Tsmin)
150 ºC
Temperature Maximum (Tsmax)
200 ºC
Time (Tsmin to (Tsmax)
60–180 seconds
Time maintained above
Temperature Minimum (TL)
Time (tL)
217 ºC
60–150 seconds
Peak Temperature (TP)
260 +0 ºC
Time within 5 ºC of
Actual Peak Temperature (tp)
20–40 seconds
Ramp-Down Rate
6 ºC / second Maximum
Time 25 ºC to Peak Temperature
8 minutes Maximum
© 2023 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: BA.03/17/23
Current Sense Resistor Datasheet
Four-Terminal Surface Mount Resistor
L4CA/C Series
Reliability Specifications
Test
Procedure
Specifications
Resistance Data
Resistance data at 25 °C
Must meet datasheet
requirements
TCR Data
Tested at 25 °C and 125 °C , TCR = (Rb-Ra) / Ra ×
1 / (Tb-Ta) × 10 6
Must meet datasheet
requirements
Dimensional Data
Measure all dimensions specified in datasheet
Must meet datasheet
requirements
Short Time Overload
JIS-C-5201, 4.13
Applied voltage: 2.5X rated power. Test duration: 5 seconds
±1.0%
Load Life (1)
JIS-C-5201-1, 4.25
Test Temperature: 70 °C ± 3 °C, Applied voltage: rated voltage
Test period: 1,000 hours with power cycling as follows: ±1.0%
90 min. power ON / 30 min. power OFF
Moisture Resistance (1)
JIS-C-5201-1, 4.24
Test Condition: 40 °C ± 3 °C / 90–95% RH Test period:
1,000 hours
±1.0%
Temperature Cycle (1)
(Thermal Shock) JESD22-A-104
Repeat 1,000 cycles as follows: -55 ± 3 °C (30 min.) /
+155 ±3 °C (30 min.) Transition time of 1 minute maximum
±1.0%
Resistance To Solder Heat #1
J-STD-020
One reflow cycle according to JEDEC J-STD-020, cool down
then parts are immersed into a molten solder bath with a
temperature of 260 °C for a period of 10 ±1 seconds.
Part must meet initial
specifications following
testing
Resistance To Solder Heat #2
J-STD-020
Per component MSL classification per J-STD-020,
3 reflow cycles
±1.0%
High Temperature Exposure (1)
MIL-STD-202, Method 108, Condition D
Test Temperature: Maximum rated operational temperature
Test period: 1,000 hours , No electrical load
±1.0%
HAST (1)
(Highly Accelerated, Stress Test - Autoclave)
Test Temperature: 121 °C ± 2 °C Test Pressure: 30 PSIA,
Test period: 48 hours , No electrical load
±1.0%
Terminal Strength
AEC-Q200-006
Test Force: 17.7N Duration: 60 ±1 seconds, Parts must be
soldered onto a PCB to perform test
±0.5%
Vibration (1)
MIL-STD-202, Method 204, Condition B
Frequency: 10 - 2,000 Hz
Acceleration: 15 ± 1.5 gs
Test Duration: 20 mins / 12 Cycles
±1.0%
Mechanical Shock (1)
MIL-STD-202, Method 213, Condition A
Force: 50 ± 5 gs
Test Duration: 11 ±1 milliseconds
±1.0%
Solderability
MIL-STD-202, Method 208H, Category 3
Dipped into molten solder for 3 ±1 seconds at 245 ± 5 °C
Flux activity type R0
New solder coverage of
90% minimum
Pre-Conditioning
Per component MSL classification per J-STD-020,
3 reflow cycles
N/A
4
© 2023 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: BA.03/17/23
Current Sense Resistor Datasheet
Four-Terminal Surface Mount Resistor
L4CA/C Series
Dimensions
All dimensions in mm
Part Number
W
L
T
D
C
B
A
L4CA0612
3.20±0.20
1.55±0.20)
0.50±0.20
2.16±0.20
0.50±0.20
0.46±0.20
0.41±0.20
L4CC0306
1.60±0.20
0.80±0.15
0.55±0.10
0.93±0.20
0.40±0.10
0.23±0.10
0.18±0.10
Recommended Land Pattern
Part Number
P
W
D
V
E
Loading
L4CA0612
0.762 mm
2.29 mm
1.014 mm
0.762 mm
0.381 mm
1.0 W
L4CC0306
0.35 mm
1.30 mm
0.40 mm
0.40 mm
0.20 mm
0.33 W
Packaging
Part Number
Halogen Free
Packaging Option
Quantity
Quantity & Packaging Codes
L4CA0612
Yes
Tape and Reel
5000
NR
L4CC0306
Yes
Tape and Reel
5000
NR
5
© 2023 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: BA.03/17/23
Current Sense Resistor Datasheet
Four-Terminal Surface Mount Resistor
L4CA/C Series
Part Numbering System
L4CA 0612 R L R001 F N R
Packaging Code
R = Tape and Reel
Series
Size
Quantity Code
TCR
Tolerance Code
N = 5,000
Q = ±50 ppm °C,
R = ±100 ppm °C,
G = ±150 ppm °C
F = ±1%
D = ± 0.5%
Resistance Value Code
Littelfuse Surface
Mount CSR
4 digit code for all values.
R or M denotes decimal
position as necessary
Tape and Reel Specifications
Part Number
A±5 (mm)
N±2 (mm)
W1±1 (mm)
L4CA0612
178
60
9.0
Part Number
W
P0
P
P2
A0
B0
D0
F
E
T
T1
K0
L4CA0612
8.00±0.30
4.00±0.10
4.00±0.10
2.00±0.10
1.90±0.20
3.50±0.20
1.50±0.10
3.50±0.10
1.75±0.10
0.20±0.10
Max. 0.1
0.85±0.20
L4CC0306
8.00±0.30
4.00±0.10
4.00±0.10
2.00±0.10
0.98 ± 0.20
1.85 ± 0.20
1.50±0.10
3.50±0.10
1.75±0.10
0.75 ± 0.20
Disclaimer Notice - Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications. Littelfuse products are
not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at http://www.littelfuse.com/disclaimer-electronics.
6
© 2023 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: BA.03/17/23
