ł
˘
’
ł
˘
ˇ Ğ
fi◊‘ÿ¥ •Õ
ł
∆
Ł
ÿ ÿ Õ
−
— ÿ ½
Łÿ
ÿ
∏ ∞
ÿ Õ
ÿ ∆
∏ł
Ÿ
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Value Flat
Resistors
Low Value Flat
Low Value
Chip Resistor
Flat
Chip
Value
Chip Resistor
Resistor
Resistor
Low
Value
Flat Chip
Low
LRC/LRF Series
Flat
LR Series
Chip
•
LRC/LRF Series
Standard 2512, 2010 and 1206 sizes
LR Series
Resistor
Standard
2512, 2010 and 1206 sizes
•
2010 and 1206 sizes
•
Standard
2512,
Resistance values down to 0.003 ohms
Standard 2512, 2010 and 1206 sizes
Resistance
•
ohms
Resistance values down to 0.003 ohms
•
Resistance
values down to 0.003
solder-plated copper
values down to
LRC/LRF Series
Leach resistant
0.003 ohms
Leach
wrap-around
copper wrap-around
resistant solder-plated
termination
Leach resistant solder-plated copper wrap-around termination
•
Leach
AEC-Q200
solder-plated copper
resistant
•
Standard 2512, 2010 and 1206 sizes
•
Low
Resistance values
inductance - less than 0.2nH
AEC-Q200 Qualified
down to
•
wrap-around termination
0.003 ohms
RoHS compliant and SnPb variants
•
AEC-Q200 Qualified
RoHS compliant and SnPb variants
•
Low inductance - less than 0.2nH
Resistors
Low
Welwyn Components
Welwyn Components
Welwyn Components
Make Possible
•
•
•
•
Leach resistant solder-plated copper
wrap-around termination
AEC-Q200 Qualified
Low inductance - less than 0.2nH
AEC-Q200 Qualified
Electrical Data
All Pb-free parts comply with EU
2011/65/EU (RoHS2)
All Pb-free parts comply with EU Directive 2011/65/EU amended by (EU) 2015/863 (RoHS3)
0.5
1.0
1.5/2.0*
LR(F)2010
1R
LR(F)2512
Resistance range
ohms
0R010 to
LR2010
0R003 to 1R
LR2512
0R003 to 1R
LR1206
Power rating @70°C
watts
1
2
D
v
5
200
200
200
Power rating at
1
70° C
ielectric withstanding voltage
0.
olts
1.0
1.5/2.0*
ohms
R003 to 1R0
Resistance range
LR1206
LR2512
TCR
0
R
LR2010
t f
( na
Resistance range
ohms
0R
ppm/
to 1R
010
° C
<R01: 5,
±1
0
0
0
Co
2,
t
o
c
1R
actory for val
R
e
03
lo
o 1R
050 ohms)
0
u
0
be
t
w 0.
%
≥R01:
03 t
5
1,
Resistance tolerance
1
Power rating at 70° C
e i
watts
0.5
1.
≤R005
5%, >R005 1,
.
2,
/2.0*
0
1 5
5%
R
oltage
%
Dielectric withstanding
s
v
stance tolerance
volts
200
00
200
≥R05: ±100, R025–R047: <+200,
2
R015-R024: <+300,
TCR
sistance range
ppm/°C
Re
ohms
0R010
°
t
C
1R
o
0R003 to 1R
0R003 to 1R
Temperature rise at rated power
8
0
90
R01-R014: <+500, <R01:
value
TCR
ppm/° C
±100 (Contact
4
actory for
<+900
below
0
.050 ohms)
f
0
Dielectric withstandi
Pad
voltage
area for max power rating @ 70° C
volts
ng
and trace
200
2
200
200
Dielectric withstand
e
volts
200
mm
30
30
100
Resistance toleranc
%
≤R005
5%, >R005 1, 2, 5%
TCR
ppm/° C
±100 (Con
-55
t
to
actory for value below 0.050 ohms)
tac f
+150
Ambient temperature range
°C
2
Temperature rise at
*2
at
W atts
wer
total solder pad and trace size
°
of 300 mm
40
r ed po
with
C
80
90
Resistance tolerance
%
≤R005
5%,
2
Values
E24 preferred
>R005 1, 2, 5%
2
Pad and
a
trace area
t
for
t
max
ow
mm
C
30
30
100
Temper tur
rise at
ra ed p
power rating @ 70° C
°
40
80
Temperature
e rise a
rated power
er
°C
40
80
90
90
2
30
30
30
100
300
100
Pad / trace
with total solder pad
rating @
size
mm
2
*2
Pad
atts
trace
3
area for max power
and trace
70° C
of 300 mm
mm
2
W
and
area
Electrical Data
ing at 70° C
Power rat
Electrical Data
LR1206
watts
LR2010
LR2512
LR(F)1206
0.5
watts
Physical Data
Physical Data
Dimensions (mm)
LR1206
LR2010
LR2512
ł
˘
Note 1:
atts with total
for value
pad and trace size of 300 mm
2
range. Note 2: Many values = N x R001 and N x R005 up to N=10 are also
*2 W
Contact factory
solder
– tolerance combinations outside this
Dimensions (mm)
available. Note 3: Recommended minimum pad & adjacent trace area for each termination for rated dissipation on FR4 PCB
Size
L
W
H (max)
Physical Data
LR1206
Dimensions (mm)
S i ze
Si ze
LR(F)1206
LR(F)2010
LR(F)2512
D
3.20±0.305
1.63±0.20
0.8
0.48±0.25
LR2010
LR2512
L
5.23±0.38
3.20±0.305
5.23±0.38
6.50±0.38
5.23±0.38
L
3.20±0.305
6.50±0.38
6.50±0.38
W
1.63±0.20
1.63±0.20
2.64±0.25
2.64±0.25
W
3.25±0.25
3.25±0.25
W
2.64±0.25
3.25±0.25
H (max)
0.8
0.84
0.84
0.84
0.84
H (max)
0.84
0.84
D
0.48±0.25
0.48±0.25
LR 1206 /
0.8
10 / 2512
20
0.48±0.25
0.48±0.25
0.48±0.25
0.6 ±0.25
0.6 ±0.25
0.6 ±0.25
D
L
’
ł
˘
ˇ Ğ
fi◊‘ÿ¥ •Õ
ł
∆
Ł
ÿ ÿ Õ
−
— ÿ ½
Łÿ
ÿ
∏ ∞
ÿ ∆
ÿ ∆
∏ł
Ÿ
ŁŁ
Û
H
LR 1206 /
/
2010 /
/
2512
LR 1206 2010 2512
W
W
H
H
D
L
L
Solder Plating
Low Value Flat
Chip Resistor
LRC/LRF Series
Nickel Barrier Layer
Protective Overcoat
Copper W raparound
Resistive Element
Termination
Copper Termination
D
D
Solder
Plating
Plating
Alumina Substrate
Solder
Nickel
Barrier Layer
Nickel
Barrier Layer
Protective Overcoat
Protective Overcoat
Welwyn
Copper W raparound
Resistive Element
Copper W raparound
Resistive Element
Termination
Copper Termination
Termination
Copper Termination
Alumina Substrate
Alumina Substrate
A
Components
Recommended Solder Pad Dimensions (mm)
A
B
LR(F)1206
LR(F)2010
LR(F)2512
General Note
2.0
4.0
Marking
LR parts are marked with the value code, where this
is up to four characters (e.g. "R025"). For five character value
codes the value in milliohms is marked, with "m" indicating
decimal position (e.g. "2m5" for value code R0025).
C
C
1.25
B
General Note
3.05
6.5
1.5
Welwyn Components reserves the right to make changes in product specification without notice or liability.
All information is subject to Welwyn’s own data and is considered accurate at time of going to print.
3.7
7.75
1.5
© Welwyn Components Limited
· Bedlington, Northumberland NE22 7AA, UK
A subsidiary of
TT electronics plc
04.10
General Note
subject to Welwyn’s own data and is considered accurate at time of going to print.
All information is
Telephone: +44
to
1670
changes in product specification without notice or liability.
Welwyn Components reserves the right
(0)
make
822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
Welwyn Components reserves the right to make changes in product specification without notice or liability.
(%)
General Note
All information is subject to Welwyn’s own data and is considered accurate
NE22 7AA,
going to print.
© Welwyn Components Limited
· Bedlington, Northumberland
at time of
UK
General Note
Temperature Cycling
©
4
Electronics plc
©
TT
Electronics plc
TT
6
7
JESD22 Method JA-104
R% 0.25
R%
R%
0.5
0.5
0.1
0.2
0.2
Power Rating
AEC-Q200 Table 7
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website:
100
www.welwyn-tt.com
Typ.
Max.
Method
TT Electronics reserves the right to make changes in product specification without notice or
R05)
liability.
(@1R0)
©
information is subject to TT Electronics’ own
·
data and is considered accurate
NE22
(add
going to print.
Welwyn Components Limited
Bedlington, Northumberland
7AA, UK
ref
Test
All
information is subject to TT Electronics’ own data and is considered accurate
at time of
going to print.
All
80
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email:
at time of
0.5
0.2
3
High Temp. Exposure MIL-STD-202 Method 108
info@welwyn-tt.com · Website: www.welwyn-tt.com
R%
Moisture Resistance MIL-STD-202 Method 106
Biased Humidity MIL-STD-202 Method 103
60
40
BI Technologies IRC Welwyn
www.ttelectronicsresistors.com
04.10
www.ttelectronics.com/resistors
A subsidiary of
04.10
TT electronics plc
A subsidiary of
TT electronics plc
23
23
12.15
03.21
23
Low Value Flat
A
Low Value
Resistor
Chip Resistor
Flat Chip
2.0
LR1206
LR Series
LR2010
LR2512
Recommended Solder Pad Dimensions (mm)
B
4.0
6.5
7.75
C
1.25
B
A
Make Possible
LR Series
3.05
3.7
1.5
C
1.5
Performance Data
ref
3
4
6
7
14
16
18
21
22
AEC-Q200 Table 7
Method
Test
High Temp. Exposure MIL-STD-202 Method 108
Temperature Cycling
JESD22 Method JA-104
Moisture Resistance MIL-STD-202 Method 106
Biased Humidity MIL-STD-202 Method 103
Vibration MIL-STD-202 Method 204
Thermal Shock MIL-STD-202 Method 107
Solderability
Board Flex
Terminal Strength
Short Term Overload
Low Temperature Storage
Leach Resistance
J-STD-002
AEC-Q200-005
AEC-Q200-006
6.25 x Pr for 2s
-65°C for 100 hours
Solder dip at 250°C
(add R05)
Max.
(@1R0)
Typ.
0.2
0.1
0.2
0.2
0.5
(%)
100
80
R% 0.25
R% 0.5
R% 0.5
R%
1
R% 0.5
R% 0.25
R% 0.5
R% 0.25
R% 0.5
R% 0.5
Power Rating
R% 0.5
60
40
20
0
25
70
Ambient temperature
150 (°C)
8 Operational Life (Cyclic Load) MIL-STD-202 Method 108
15 Resistance to Soldering Heat MIL-STD-202 Method 210
0.05
0.1
0.2
0.1
R% 0.25 0.05
>95% coverage
LRC 251
2 1 w at
2
t
LRC 201
0 0.5 wat
1w
t
LR C 12
06 0.25
.5 w att
w att
90s minimum
Note:
1. Although 2010 and 2512 sizes have passed temperature cycling and thermal shock, it is in general not recommended that ceramic
chips this large be used on FR4 in a severe temperature cycle environment due to the possibility of solder joint fatigue.
Full AEC-Q200 qualification applies only to ohmic values
≥R01.
Ordering Procedure
Ordering Procedure
Example: LRF2512 at 10 milliohms (hence flip-chip mounted) and 2% tolerance on a reel of 1800 pieces
This product has two valid part numbers:
LRF2512
–
R01GW
European (Welwyn) Part Number: LRF1206-R02FW
(1206, 20 milliohms ±1%, Pb-free)
Type
Mounting
F
L
R
F
1
2
0
6
-
R
0
2
F
4
W
5
4
Tolerance
F = ±1%
G = ±2%
J = ±5%
5
Termination & Packing
W
Pb-free, standard packing
T1 Pb-free, 1000/reel (non-standard)
PB
SnPb finish, standard packing
T1PB SnPb finish, 1000/reel (non-standard)
Standard packing is tape & reel
1206 & 2010
3000/reel
2512
1800/reel
1
2
Conventional (element up)
Flip-chip (element down)
1
Size
Type
Value (use IEC62 code)
Values > R025
3
Values < R025
2
3
Size
Value
LR = Conventional orientation 1206 E24 = 3/4
2010 characters
Tolerance (use
(values
code)
IEC62
>R025)
F
1%
LRF = Flip-chip orientation 2512 R = ohms
G 2%
(values
≤R025)
J
5%
1206 or 2010
3000/reel
Standard
2512
1800/reel
USA (IRC) Part Number: LRC-LRF1206LF-01-R020-F
(1206, 20 milliohms ±1%, Pb-free)
T1
All sizes
1000/reel
W
Tape
L
R
1
C
-
L
R
2
F
1
2
3
0
6
L
4
F
-
0
5
5
TCR
6
Value
1
-
R
0
6
7
Tolerance
F = ±1%
G = ±2%
J = ±5%
2
0
Packing
-
F
7
04.10
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
© Welwyn Components Limited
Bedlington, Northumberland NE22 7AA, UK
1
Family
LRC
2
Model
3
Size
4
Termination
Packing
Standard packing is tape & reel
Pb-free
All sizes
Pb-free
1000/reel
Pb-free
1206 & 2010 3000/reel
Pb-free
SnPb
Pb-free
2512
1800/reel
Pb-free
Pb-free
LR = Conventional orientation 1206 Omit for SnPb 01 = standard 4 characters
(values >R025)
R = ohms
2010 LF = Pb-free (±100ppm/°C
values
≥R05)
LRF = Flip-chip orientation 2512
(values
≤R025)
General
Note
TT Electronics reserves the right to make changes in product specification without notice or liability.
All information
is subject to TT Electronics’ own data and is considered accurate at time of going to print.
TT Electronics’ own data and is considered accurate at time of going to print.
BI Technologies IRC Welwyn
www.ttelectronicsresistors.com
www.ttelectronics.com/resistors
© TT
Electronics plc
12.15
03.21
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