73WLx & 73WEx Series
Current Sensing Resistor – Wide Terminal Chip
Features
Thick Film Construction – Wide Terminal Configuration
0.75 – 21 Watts Power Rating @ +70°C
73WEx – Lead Free Design
Resistance Range 5 – 910 milliohms
73WLX – RoHS Compliant in Accordance with EU Directive 2011/65/EU and 2015/863
Operating Temperature to +155°C
- Lead-Free Termination Finish
- Exemption 7(c)-I, Electrical and electronic components containing
EIA Standard Package Sizes
lead [Pb] in glass
Terminal Finish – Matte Tin (e3)
Reflow Capable per JEDEC J-STD-020, +260°C maximum
Tape and Reel Packaging
Applications
Current Detection
Current Limiting
Regulated Battery Circuits
Motor Control
Power Supply
Hard Disk Drives
Inverter/Converter
Industrial Equipment
Infotainment Systems
Description
73WLx & 73WEx Series Current Sensing Resistors are ceramic packaged devices that provides excellent accuracy
for current detection. Each resistor has good electrical and thermal characteristics.
Ordering Information
Pa cka g e
Code
6
Model
73
WL
Code
WL
WE
Type
4-Digit Resistor Code
4-Digit Resistor Code
Res i s tor
V a l ue
R024
Code
R024
R100
Code
4
6
7
Res i s tor
T ol era nce
G
Resistor Value
2
0.024 ohms
2
0.100 ohms
Package Size
1206 [3216]
2010 [5025]
2512 [6432]
Code
F
J
Tolerance
±1%
±5%
Notes:
1. No dashes or spaces to appear in part number.
2. The "R" indicates decimal point. See Addendum for Standard EIA Values and Codes.
N ot a l l perf orm a nce com bi na ti ons a nd res i s tor va l ues m a y be a va i l a bl e.
Conta ct your l oca l CT S Repres enta ti ve or CTS Cus tom er Servi ce f or a va i l a bi l i ty.
This product is specified for use only in standard commercial applications. Supplier disclaims all express and implied
warranties and liability in connection with any use of this product in any non-commercial applications or in any application
that may expose the product to conditions that are outside of the tolerances provided in its specification.
DOC# 008-0543-0 Rev. C
Page 1 of 7
©2017 CTS® Corporation. Information/product(s) subject to change. No warranty that product(s) will meet the stated specifications for customer specific applications or test
equipment. Visit www.ctscorp.com for list of applicable patent(s), more information, or to request a quote.
73WLx & 73WEx Series
Current Sensing Resistor – Wide Terminal Chip
Ordering Information
Part Number Examples
T ol era nce /
V a l ue
0.024
0.100
0.750
0.007
0.016
0.091
Ohm s
Ohm s
Ohm s
Ohm s
Ohm s
Ohm s
Pa cka g e
Si ze
2010 [5025]
1206 [3216]
2512 [6432]
2010 [5025]
1206 [3216]
2512 [6432]
4- Di g i t Code
J
[ ±5%]
73WL6R024J
73WL4R100J
73WL7R750J
73WE6R007J
73WE4R016J
73WE7R091J
F
[ ±1%]
73WL4R100F
73WL7R750F
73WE4R016F
73WE7R091F
Electrical & Environmental Specifications
Operating Conditions
Mo d el
Ty p e
73WL4
P ac k age
Code
I n c h [m m ]
1206 [3216]
R at ed
P o w er
[W at t s]
0.75
R esist an c e
R an ge
[m Ω]
R esist o r
To ler an c e
[% ]
Tem p er at u r e
C o effic ien t
100 - 910
±1
±200ppm/°C
10 - 33
36 - 91
±500ppm/°C
±5
100 - 910
100 - 910
73WL6
2010 [5025]
1.0
73WL7
2512 [6432]
2.0
1206 [3216]
0.75
7 3 W E6
2010 [5025]
1.0
7 3 W E7
2512 [6432]
2.0
DOC# 008-0543-0 Rev. C
200
400
+70°C
-55°C to +155°C
200
400
+70°C
-55°C to +155°C
200
400
±100ppm/°C
+70°C
-55°C to +155°C
200
400
±100ppm/°C
+70°C
-55°C to +155°C
200
400
±100ppm/°C
+70°C
-55°C to +155°C
200
400
±200ppm/°C
±350ppm/°C
±200ppm/°C
±500ppm/°C
±5
100 - 910
7 3 W E4
-55°C to +155°C
±200ppm/°C
±1
10 - 33
36 - 91
Ov er lo ad
Vo lt age
[m ax V]
+70°C
±350ppm/°C
±500ppm/°C
±5
100 - 910
100 - 910
W o r k in g
Vo lt age
[m ax V]
±200ppm/°C
±1
10 - 33
36 - 91
R at ed
Op er at in g
Am b ien t
Tem p er at u r e
Tem p er at u r e
R an ge
±350ppm/°C
±200ppm/°C
10 - 91
±1
5 - 91
±5
10 - 91
±1
5 - 91
±5
10 - 91
±1
5 - 91
±5
Page 2 of 7
©2017 CTS® Corporation. Information/product(s) subject to change. No warranty that product(s) will meet the stated specifications for customer specific applications or test
equipment. Visit www.ctscorp.com for list of applicable patent(s), more information, or to request a quote.
73WLx & 73WEx Series
Current Sensing Resistor – Wide Terminal Chip
Electrical & Environmental Specifications
Power Derating Curve – Typical
With the rated ambient temperature set to +70°C, the maximum power [maximum current for 0Ω product] at a temperature of no more
than rated ambient temperature shall be equal to the rated power [rate current for 0Ω product]. The maximum power at a temperature
exceeding the rated ambient temperature shall be a value determined by reducing the rated power according to the power reduction
curve in the figure below.
Rated Voltage
The rated voltage shall be the DC or AC [effective power frequency] voltage corresponding to the rated power and shall be determined
with the formula shown below. If the determined rated voltage exceeds the maximum operating voltage specified in Operating Conditions
table, the maximum operating voltage shall be the rated voltage.
E = Rated Voaltge [V]
E = √ PxR
P = Rated Power [W]
R = Nomimal Resistance [Ω]
Environmental Parameters
Max im u m D elt a R [% ]
Test
Test D esc r ip t io n
7 3 W L x & 7 3 W Ex
Tem p er at u r e C o effic ien t
S h o r t -Tim e Ov er lo ad
I n su lat io n R esist an c e
D ielec t r ic W it h st an d in g Vo lt age
R esist an c e t o S o ld er H eat
S o ld er ab ilit y
H igh Tem p er at u r e Ex p o su r e
C h an ge o f Tem p er at u r e
±200ppm/°C
±2.0
9
1
Over 10 ohm
No Breakdown
±1.0
No Damage
Over 95%
Coverage
±3.0
±1.0
No Damage
Measured temperature at -55°C to 155°C
Apply 2.5 times the rated voltage, 5 seconds, maximum 100V
Measured at terminals and center of resistor by D.C. 100V ±15V in 1 minute [JIS C 5202]
Applied at terminals and center of resistor on A.C. 400V, 1 minute [JIS C 5201-1 4.7]
Immerse in solder, +260°C ±5°C, 10 ±1 seconds
Immerse terminal in solder [Sn3Ag0.5Cu], +245°C ±0.5°C, 3 ±0.5 seconds [JIS C 5201-1 4.17]
1,000 hours @ +155°C ±2°C, bias load 0% power [JIS C 5201-1 4.23.2]
30 minutes @ -55°C, 10 minutes @ +25°C, 30 minutes @ +155°C, 10 minutes @ +25°C; 1,000 cycles
Mo ist u r e Resist an c e
±1.0
MIL-STD-202, Method 106, 0% power 7a and 7b not required, 1 cycle = 24 hours, 10 cycles
B ias Hu m id it y
±3.0
1,000 hours @ +85°C ±2°C, 90% - 95% relative humidity, bias load 10%, on time 90 minutes/off time 30 minutes
En d u r an c e [Rat ed L o ad ]
±3.0
1,000 hours @ +70°C ±3°C, bias load, on time 90 minutes/off time 30 minutes
R esist an c e t o S o lv en t
No Damage
Immerse in Isopropyl alcohol, +20°C to +25°C, 60 ±5 seconds
Ter m in al St r en gt h [B en d in g]
±0.1
No Damage
3mm bending, 1mm/second, hold 5 seconds
1. Temperature Coefficient value varies by resistance range. Referecne data sheet for specific value.
DOC# 008-0543-0 Rev. C
Page 3 of 7
©2017 CTS® Corporation. Information/product(s) subject to change. No warranty that product(s) will meet the stated specifications for customer specific applications or test
equipment. Visit www.ctscorp.com for list of applicable patent(s), more information, or to request a quote.
73WLx & 73WEx Series
Current Sensing Resistor – Wide Terminal Chip
Mechanical Specifications
Package Drawing/Dimensions
Mo d el
Typ e
73WL4
7 3 W E4
73WL6
7 3 W E6
73WL7
7 3 W E7
P ac k age
Code
I n c h [m m ]
L
1206 [3216]
3.2 ±0.15
5.0 ±0.2
2010 [5025]
2512 [6432]
6.3 ±0.2
W
1.6 ±0.15
2.5 ±0.2
3.2 ±0.2
Recommended Pad Layout
Mo d el
Ty p e
73WL4
7 3 W E4
73WL6
7 3 W E6
73WL7
7 3 W E7
0.55
+0.15
-0.05
0.56 ±0.015
0.56 ±0.15
c
d
0.3 ±0.2
0.5 ±0.2
0.5 ±0.2
0.3 ±0.2
0.6 ±0.2
0.5 ±0.2
0.5 ±0.2
0.9 ±0.2
0.6 ±0.2
0.6 ±0.2
Notes
C
D im en sio n s
[m m ]
L
W
0.65
3.2
2.65
1.3
5.0
4.0
1.45
6.4
4.85
DOC# 008-0543-0 Rev. C
D im en sio n s
[m m ]
t
1. Terminal Details
Base Metal - Silver [Ag] or Cooper [Cu] plate.
Barrier Plating – Nickel [Ni].
Finish Plating – Matte Tin [Sn].
Page 4 of 7
©2017 CTS® Corporation. Information/product(s) subject to change. No warranty that product(s) will meet the stated specifications for customer specific applications or test
equipment. Visit www.ctscorp.com for list of applicable patent(s), more information, or to request a quote.
73WLx & 73WEx Series
Current Sensing Resistor – Wide Terminal Chip
Mechanical Specifications
Marking Information
Mo d el
Ty p e
P ar t Mar k in g
73WL4
73WL6
Rxxx = "R" is the decimal point and 3 digits [E24] are significant values. See resistor tables for codes.
73WL7
7 3 W E4
7 3 W E6
No Marking
7 3 W E7
Packaging
Tape and Reel Information
Paper Tape
Mo d el
Ty p e
73WL4
7 3 W E4
A
2.00
+0.10
-0.15
[mm]
B
3.57
+0.10
-0.15
t
0.80 ±0.20
Embossed Tape
Mo d el
Typ e
73WL6
7 3 W E6
73WL7
7 3 W E7
DOC# 008-0543-0 Rev. C
[mm]
A
B
t
2.9 ±0.1
5.3 ±0.1
1.0 ±0.1
3.4 ±0.1
6.6 ±0.1
1.0 ±0.1
Page 5 of 7
©2017 CTS® Corporation. Information/product(s) subject to change. No warranty that product(s) will meet the stated specifications for customer specific applications or test
equipment. Visit www.ctscorp.com for list of applicable patent(s), more information, or to request a quote.
73WLx & 73WEx Series
Current Sensing Resistor – Wide Terminal Chip
Packaging
Tape and Reel Information
Reel
Mo d el
Ty p e
73WL4
7 3 W E4
73WL6
7 3 W E6
73WL7
7 3 W E7
[mm]
Qu an t it y
P er Reel
W
M
A
B
C
D
5,000
13.0 ±1.4
180
2.5 ±0.6
13.5 ±0.6
21.9 ±0.6
60
4,000
17.0 ±1.4
180
2.5 ±0.6
13.5 ±0.6
21.9 ±0.6
60
4,000
17.0 ±1.4
180
2.5 ±0.6
13.5 ±0.6
21.9 ±0.6
60
DOC# 008-0543-0 Rev. C
Page 6 of 7
©2017 CTS® Corporation. Information/product(s) subject to change. No warranty that product(s) will meet the stated specifications for customer specific applications or test
equipment. Visit www.ctscorp.com for list of applicable patent(s), more information, or to request a quote.
73WLx & 73WEx Series
Current Sensing Resistor – Wide Terminal Chip
Addendum
73WLx
Standard EIA Codes and Resistor Values - E-24 [4-Digit Resistor Code for J & F Tolerances]
C OD E
OH MS
COD E
OH MS
C OD E
OH MS
COD E
OH MS
R010
0.0100
R033
0.0330
R100
0.1000
R330
0.3300
R011
0.0110
R036
0.0360
R110
0.1100
R360
0.3600
R012
0.0120
R039
0.0390
R120
0.1200
R390
0.3900
R013
0.0130
R043
0.0430
R130
0.1300
R430
0.4300
R015
0.0150
R047
0.0470
R150
0.1500
R470
0.4700
R016
0.0160
R051
0.0510
R160
0.1600
R510
0.5100
R018
0.0180
R056
0.0560
R180
0.1800
R560
0.5600
R020
0.0200
R062
0.0620
R200
0.2000
R620
0.6200
R022
0.0220
R068
0.0680
R220
0.2200
R680
0.6800
R024
0.0240
R075
0.0750
R240
0.2400
R750
0.7500
R027
0.0270
R082
0.0820
R270
0.2700
R820
0.8200
R030
0.0300
R091
0.0910
R300
0.3000
R910
0.9100
73WEx
Standard EIA Codes and Resistor Values - E-24 [4-Digit Resistor Code for J & F Tolerances]
C OD E
OH MS
COD E
OH MS
C OD E
OH MS
COD E
OH MS
R005
0.0050
R012
0.0120
R024
0.0240
R056
0.0560
R006
0.0060
R013
0.0130
R027
0.0270
R062
0.0620
R007
0.0070
R015
0.0150
R030
0.0300
R068
0.0680
R008
0.0080
R016
0.0160
R033
0.0330
R075
0.0750
R009
0.0090
R018
0.0180
R036
0.0360
R082
0.0820
R010
0.0100
R020
0.0200
R039
0.0390
R091
0.0910
R011
0.0110
R022
0.0220
R043
0.0430
DOC# 008-0543-0 Rev. C
Page 7 of 7
©2017 CTS® Corporation. Information/product(s) subject to change. No warranty that product(s) will meet the stated specifications for customer specific applications or test
equipment. Visit www.ctscorp.com for list of applicable patent(s), more information, or to request a quote.