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Resistors
Low Value Flat
Resistors
Low
Chip Resistor
Value Flat
Chip Resistor
Low
Value Flat Chip Resistor
Value Flat Chip Resistor
Chip Resistor
Chip Resistor
Low
Value Flat
Chip
Value Flat
Resistor
Low
Value Flat
Low
Low
LRC/LRF Series
LRC/LRF Series
LR Series
LR Series
•
LRC/LRF Series
Standard 2512, 2010 and
and 1206 sizes
LR Series
LRC/LRF Series
Standard 2512, 2010
1206 sizes
•
Resistors
Value Flat
Low
Value Flat
Low
Make Possible
Welwyn Components
Welwyn Components
Welwyn Components
Welwyn Components
Make Possible
Standard
2512,
•
Resistance
sizes
sizes
1206
•
2010
2010
1206 sizes
Standard
Resistance values
•
Standard
2512,
2512,
and
and
1206
down to 0.003 ohms
2010 and
values
•
Standard
2512, 2010
and
1206 sizes
sizes
to 0.003 ohms
Standard 2512, 2010
and 1206
down
Resistance
•
values down to 0.003
solder-plated
down
ohms
Resistance
•
down
0.003
solder-plated copper
•
Resistance
values
values
to
resistant
0.003 ohms
copper
ohms
LRC/LRF Series
Leach resistant
0.003
ohms
Resistance values down
•
Resistance
solder-plated
to 0.003
wrap-around
down
LRC/LRF
values
Leach
to
to
ohms
Series
Leach
wrap-around
copper
resistant
termination
Leach
wrap-around
copper wrap-around
resistant solder-plated
termination
Leach resistant solder-plated copper wrap-around termination
•
Leach
AEC-Q200
2512,
solder-plated copper
resistant
2010 and 1206 sizes
•
Leach
2512,
solder-plated
1206 sizes
resistant
•
Standard
AEC-Q200
2010 and
copper
•
Standard
•
termination
- less
less than 0.2nH
than
•
inductance
Resistance values
wrap-around
Low
Low inductance -
ohms
0.2nH
•
RoHS
AEC-Q200 Qualified
SnPb variants
Resistance values
termination
0.003 ohms
down to
to
•
wrap-around
and
down
0.003
compliant and
RoHS compliant
SnPb variants
•
AEC-Q200 Qualified
•
and
than 0.2nH
RoHS compliant
less
SnPb variants
•
Low
Low inductance - less than 0.2nH
inductance -
AEC-Q200 Qualified
•
Chip Resistor
Chip Resistor
Welwyn Components
Welwyn Components
•
•
•
•
Leach resistant solder-plated copper
•
Leach resistant solder-plated copper
wrap-around termination
wrap-around termination
•
AEC-Q200 Qualified
AEC-Q200 Qualified
ł
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ł
Ôß
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¢ ¸—ï Á ł ½ ł Ł
ï ± Š½ š ž
LR1206
LR2010
LR2512
LR1206
LR2010
LR2512
w
1.5/2
Power rating at 70° C
watts
atts
0.5
0.5
1.0
1.0
1.5/2.0*
.0*
LR(F)1206
LR(F)2010
1R
LR(F)2512
LR(F)1206
Resi
range
o
0R
t
1 t
0R
t
03
1
to 1R
LR2512
R0
0R0
to 1
o 1R
Resistance
stance range
oh
LR1206
LR(F)2010
1R
o
LR2010
0R003
0
LR(F)2512
ms
o R
LR2512
0 03
03 t
R
LR1206
hms
0R010
0
o
0
LR2010
Power rating @70°C
watts
0.5
Power rating
r
@70°C
at 70° C
ielectric withstanding volt
watts
0.5
watts
1
1
200
2
2
5/2
D
age
v
2
o
ti
e at ng
° C
v
5
0
olts
200
to
1.0
1.0
200
200
1.5/
1.
.0*
.0*
200
00
Power
P
ra
w
ng
r
at
i
1
range
1
ielectric withstanding voltage
70
D
watts
0.
olts
.5
2
R003
Resistance
ohms
ohms
R003 to 1R0
0
1R0
ontact factory for value below 0.050 ohms)
Resistance range
LR1206
LR2010
LR2512
ppm °
LR1206
/
t
C
<R01: 5,
0
±1
Con
C
3
2,
f
5
1
o
LR2010
LR2512
0.
Resi
rang
o
TC
TCR
(
0
0 (
a
b
3
Resist
Resistance
e
range
R
1
ance
stance
tolerance
ohms
hms
0R
pp
0R
/
0
o
0
R
o 1R
5,
±1
0
0
≥R01:
t
t
1,
c
1
to
ct
R
ry for val
R
e
0R0
o
o 1R
05
R
ohms)
01
m
t
C
1
<R01:
0
°
1
R0
1,
R00
t
R
a
0
u
00
el
0
w
to 1
0
%
%
≥R01:
03
2,
o
1.
≤R005
5%, >R005
3
1
t
2,
/2.0*
5
0
Resistance tolerance
1
at 70° C
esistance tolerance
Power rating
watts
0.5
5
R
%
1,
.
.0
0
Power r
el
tin
tric
t
withs
R
an
i
ding voltage
watts
volts
0.5
200
1.
≤R005
5%, >R005 1,
.
2,
/2
20
5%
0
200
1 5
5%
*
Di
a
ec
g a 70° C
t
±100,
Dielec
TCR
s
w
t
thst
e
n
an
ng
s
v
stance tolerance
t
R
i
e is
i
anc
a
r
di
g
e
oltage
rc
volts
ohms
≥R05:
0
10 to
R025–R047: <+200,
0
R015-R024: <+300,
0R003 to 1R
20
%
00
3 to 1R
200
≥R05: ±100, R025–R047: <+200,
2
R015-R024: <+300,
ppm/°C
e
0R0
°
1R
Temperature rise at rated power
40
0R0
f
90
TCR
sist
TC
ce range
ppm/°C
Re an
R
ohm
m/° C
0R010
°
t
C
±1
C
0 (Contact
0R
ctory
to
o
1R
alue b
8
low
0
R
050 o
o
m
R
)
o 1
R01-R014: <+500, <R01:
r
<+900
e
8
0
.
003 t
h
1
s
R
pp
s
0
0
m r
i
90
R01-R014: <+500,
fa
003
va
0
u
v
TCR
Dielectric with
Te
an
pe
n
ature
lt
r
a
se
e
at rated power
ppm/° C
volts
±10
20
(
0
2
ontact
4
actory for
<+900
below
0
.050 ohm
2
)
0
0 C
f
0
<R01:
2
l
0
e
0
s
0
st di
Pad
vo g
g
and trace area for max power rating @ 70° C
Dielectric withstand
o
volts
200
30
100
Dielec
R
ric
ista
thsta
o
d
Pad
v
e
lta
trace
t
e
wi
nce t
n
e
n
n
200
2
mm
≤R005
20
>R005 2,
30
20
Dielectric
s
withstand
l
e
i
ra
g
c
and
ge
area for max power rating @ 70° C
volts
%
volts
200
mm
±100
≤R005
a
5%,
5%,
0
for val
1,
5%
5%
0.050
0
hms)
100
30
c f
>R005
30
Resist
Ambient
e
temperature range
a
TC
e tol ranc
nc
R
%
ppm/° C
(Con
-55
t
to
actory
1, 2,
e below
t
u
o
°C
ppm
2
TCR
Te
temperature
e at
*2
ed po
with
tac f ctor
+150
80
y
v
Ambient
mperature ris
range
at
W atts
wer
total solder pad and trace
/° C
°
of 300
2
±100 (Con
-55
t
to
a
+150
for
2
alue below 0.050 ohms
0
°C
size
C
mm
40
r
9
)
Resis
e
a
rise a
ol
rat
W
ce
ower
total solder pad and trace size
°
of 300 mm
40
t nce t
t
era
ed
atts with
n
p
%
≤R005
5%,
*2
Temperatur
C
80
90
Values
E24 preferred
>R005 1, 2, 5%
Resis anc to
trace area for max power rating @ 70° C
%
mm
2
≤R005
5%,
2
Values
t
Pad
e
and
lerance
E24 preferred
>R005 1, 2, 5%
30
30
100
2
Temperatur
rise
e
max
a
power
w
ris t r ted po
rating
°C
40
Temperature
e
for
at
a
rated power
er
@ 70° C
°C
40
80
90
90
Pad and
a
trace area
t rated pow
mm
C
30
30
80
100
Temper tur
rise at
°
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
Pad
trace
with total solder pad
rating @
size
mm
2
and
area
30
30
30
100
300
100
Pad /
atts
trace
3
area for max power
and trace
70° C
of 300 mm
2
mm
2
*2 W
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)
Note 1:
atts with total
for value
pad and trace
pad &
of 300 mm
2
area for each termination for rated dissipation on
R005
PCB
to N=10 are also
Contact
Note 3:
solder
– tolerance combinations outside this
*2 W
available.
factory
Recommended minimum
size
adjacent trace
range. Note 2: Many values = N x R001 and N x
FR4
up
Dimensions (mm)
available. Note 3: Recommended minimum pad & adjacent trace area for each termination for rated dissipation on FR4
H (max)
PCB
Size
L
W
D
Size
L
W
H (max)
D
LR1206
0.48±0.25
3.20±0.305
1.63±0.20
0.8
Dimensions (mm)
LR1206
0.48±0.25
3.20±0.305
1.63±0.20
0.8
0.48±0.25
5.23±0.38
2.64±0.25
0.84
Dimensions (mm)
(mm)
LR2010
Dimensions
S i ze
L
W
H (max)
D
LR2010
0.48±0.25
5.23±0.38
2.64±0.25
0.84
6.50±0.38
3.25±0.25
H (max)
Dimensions (mm)
LR2512
0.48±0.25
0.84
Size
Size
L
W
W
D
D
L
H (max)
LR1206
LR2512
0.48±0.25
3.20±0.305
6.50±0.38
1.63±0.20
3.25±0.25
0.8
0.48±0.25
0.84
Size
LR(F)1206
L
W
H ma
2
D
LR 120
(
6 /
x)
010 / 2512
0.48±0.25
3.20±0.305
1.63±0.20
LR1206
0.48±0.25
3.20±0.305
1.63±0.20
0.8
0.8
LR2010
0.48±0.25
5.23±0.38
2.64±0.25
LR 1206 /
0.8
10 / 2512
20
0.84
LR(F)1206
0.48±0.25
3.20±0.305
1.63±0.20
LR(F)2010
0.48±0.25
5.23±0.38
2.64±0.25
0.84
LR2010
0.48±0.25
5.23±0.38
2.64±0.25
W
0.84
0.84
L
0.84
6.50±0.38
3.25±0.25
LR2512
0.48±0.25
LR(F)2010
0.48±0.25
5.23±0.38
2.64±0.25
6.50±0.38
3.25±0.25
LR(F)2512
0.48±0.25
0.84
W
L
6.50±0.38
3.25±0.25
LR2512
0.48±0.25
0.84
6.50±0.38
3.25±0.25
LR 1206 / 2010 / 2512
LR(F)2512
0.48±0.25
0.84
LR 1206 / 2010 / 2512
H
Electrical Data
Electrical Data
Electrical Data
Electrical Data
er rating at 70° C
Pow
Electrical Data
Electrical Data
•
inductance - less than 0.2nH
Low
Low inductance - less than 0.2nH
•
AEC-Q200 Qualified
AEC-Q200 Qualified
All Pb-free parts comply
EU
2011/65/EU (RoHS2)
All Pb-free parts comply with
with EU
2011/65/EU (RoHS2)
All Pb-free parts comply with EU Directive 2011/65/EU amended by (EU) 2015/863 (RoHS3)
Physical Data
Physical Data
Physical Data
Physical Data
Physical Data
Physical Data
ï ï ŠŁ ð
−
Ł
ï ¾Łï ï ∏ ’Ï ï ½
₣ ˆ
ł
Ôß
Ğ
¢ ¸—ï Š½ ½ ł Ł
ï ±Á ł š ž
ï ï ŠŁ ð
−
Ł
ï ¾Łï ï ∏ ’Ï ï ½
W
W
H
H
H
H
D
D
W
H
W
LR 1206 /
/
2010 /
/
2512
LR 1206 2010 2512
L
L
L
D
L
Low Value Flat
Low Value Flat
Chip Resistor
Chip Resistor
LRC/LRF Series
Copper Termination
D
D
Nickel Barrier
Solder Plating
Layer
Nickel Barrier
Layer
Alumina Substrate
Protective Overcoat
Solder Plating
Protective Overcoat
Welwyn Components
Copper W raparound
Resistive Element
Nickel
Barrier Layer
Barrier Layer
Copper W raparound
Resistive Element
Nickel
Protective
Overcoat
Overcoat
Termination
Protective
Copper Termination
Welwyn Components
Termination
Copper W raparound
Copper Termination
LRC/LRF Series
Resistive Element
Alumina Substrate
Copper W raparound
Resistive Element
Alumina Substrate
Termination
Copper Termination
Termination
Copper Termination
Alumina Substrate
Alumina Substrate
Recommended Solder Pad Dimensions (mm)
A
A
B
C
Recommended Solder Pad Dimensions (mm)
A
A
2.0
B
4.0
C
1.25
LR(F)1206
3.05
6.5
Welwyn Components reserves the right to make changes in product specification
1.5
without notice or liability.
B
All
Note
General
information is subject to Welwyn’s own data and is considered accurate at time of going to print.
LR(F)2010
3.05
6.5
Welwyn Components reserves the right to make changes in product specification
1.5
without notice or liability.
LR(F)2512
3.7
7.75
1.5
© Welwyn Components Limited
· Bedlington, Northumberland NE22 7AA,
to
General Note
All information is subject to Welwyn’s own data and is considered accurate at time of going
UK
print.
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
General
LR(F)2512
Note
subject to Welwyn’s own data
Limited
· Bedlington, Northumberland NE22
print.
3.7
7.75
1.5
All
Note
General
information is
© Welwyn Components
and is considered accurate at time of going to
7AA, UK
Welwyn Components reserves the
(0) 1670 822181 · Facsimile: +44 (0)
specification without notice or liability.
Telephone:
right to make
make changes in product
1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
+44
right to
changes in product specification without notice or liability.
Welwyn Components reserves the
(%)
General Note
All
Welwyn Components Limited
·
is considered accurate at time
time of
to
©
Note
General
information is subject to Welwyn’s
data and
Bedlington, Northumberland NE22
going
UK
print.
print.
General
subject
All information is
Note
to Welwyn’s own
own data and is considered accurate at
of
7AA,
going to
AEC-Q200 Table 7
Telephone: +44 (0) 1670 822181 · Facsimile:
Email:
www.welwyn-tt.com
Max.
Welwyn
TT Electronics reserves the right to make changes
+44 (0)
product specification without notice or
Typ.
Website:
100
Components reserves the right to make changes in
1670 829465 ·
without
info@welwyn-tt.com ·
liability.
Method
in product specification
notice or
R05)
liability.
(@1R0)
©
Note
Welwyn Components Limited
Bedlington, Northumberland
(%)
ref
Test
General
information is subject to TT Electronics’ own
·
data and is considered accurate at
of
(add
going to print.
All information is subject to Welwyn’s own data and is considered accurate
NE22
NE22
going
UK
print.
All
information is subject to
Limited
· Bedlington, Northumberland
at time
time of
to
© Welwyn Components
TT Electronics’ own data and is considered accurate
7AA,
7AA,
going to print.
UK
All
AEC-Q200 Table
822181 · Facsimile: +44 (0) 1670
at time of
Telephone: +44 (0) 1670
7
Telephone: +44 (0) 1670 822181 · Facsimile: +44
MIL-STD-202
829465 · Email:
Max.
www.welwyn-tt.com
Typ.
3
High Temp. Exposure
(0) 1670 829465 · Email: info@welwyn-tt.com · Website:
100
www.welwyn-tt.com
Method 108
info@welwyn-tt.com · Website:
80
R% 0.5 0.2
Protective Overcoat
Protective
Resistive Element
Overcoat
Copper Termination
Resistive Element
D
Solder Plating
Nickel Barrier Layer
Solder Plating
Copper W raparound
Nickel Barrier Layer
Termination
Copper W raparound
Solder
Plating
Plating
Alumina Substrate
Solder
Termination
LR(F)1206
LR(F)2010
General Note
2.0
4.0
1.25
B
C
C
BI Technologies IRC Welwyn
A subsidiary of
www.ttelectronicsresistors.com
04.10
04.10
TT electronics plc
www.ttelectronics.com/resistors
A subsidiary of
TT electronics plc
A subsidiary of
04.10
TT electronics plc
A subsidiary of
TT electronics plc
04.10
A subsidiary
A subsidiary of
of
04.10
TT electronics
TT electronics plc
plc
23
23
Power Rating
Temperature Cycling JESD22 Method JA-104
R% 0.25 0.1
©
4
Electronics plc
TT
7
Biased Humidity MIL-STD-202 Method 103
R% 0.5 0.2
6
Moisture Resistance MIL-STD-202 Method 106
R%
0.5
0.2
r Rating
Method
R05)
(@1R0)
©
information
Electronics
TT Electronics’
Cycling
and is considered accurate
NE22
(add
going to print.
0.1
Components
ref
©
4
Test
Temperature
own
Bedlington, Northumberland
at time of
UK
All
Welwyn
is subject to
plc
Limited
·
data
JESD22 Method JA-104
7AA,
R% 0.25
TT
Electronics plc
© TT
(0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
80
60
Telephone: +44
High Temp. Exposure MIL-STD-202 Method 108
0.5 0.2
3
R%
R% 0.5 0.2
6
Moisture Resistance MIL-STD-202 Method 106
60
40
23
23
23
www.ttelectronicsresistors.com
04.10
12.15
10.19
12.15
23
Low Value Flat
Resistors
Chip Resistor
LR1206
LR Series
LR2010
LR Series
LR2512
Recommended Solder Pad Dimensions (mm)
A
2.0
3.05
3.7
B
4.0
6.5
7.75
C
1.25
B
A
Low Value Flat Chip Resistor
Make Possible
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
Standard packing is tape & reel
1206 & 2010
3000/reel
2512
1800/reel
1
2
Conventional (element up)
Flip-chip (element down)
Values > R025
3
Values < R025
2
Size
3
Value
1
Size
Type
Value (use IEC62 code)
LR = Conventional orientation 1206
Tolerance (use IEC62 code)
F
G
J
(values >R025)
1%
2%
LRF = Flip-chip orientation
(values
≤R025)
5%
E24 = 3/4
2010 characters
2512 R = ohms
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
10.19
Embedded System
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