Low Value Flat
Resistors
Low Value Flat
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Chip Resistor
Chip
Resistor
Low
Value
Flat
Chip Resistor
Low Value
Flat
LRC/LRF Series
LR
Series
ChipSeries
Resistor
LRC/LRF
• Standard 2512, 2010 and 1206 sizes
Make Possible
Welwyn Components
Welwyn Components
Welwyn Components
Standard 2512,
2010
andand
1206
sizesdown
• Resistance
values
• Standard
2512,
2010
1206
sizes to 0.003 ohms
Resistance values
down
to 0.003solder-plated
ohms
• Leach
resistant
•LRC/LRF
Resistance
values
down
to 0.003 ohms copper
Series
Leach resistant wrap-around
solder-plated copper
wrap-around termination
termination
•• Leach
resistant
solder-plated
copper
Standard
2512,
2010
and
1206
sizes
AEC-Q200 Qualified
• Low
inductance - less than 0.2nH
termination
• wrap-around
Resistance
values
down
to 0.003 ohms
RoHS
compliant
and
SnPb
variants
• AEC-Q200
Qualified
• Low inductance
- less than
0.2nH
•
•
•
•
Leach resistant solder-plated copper
wrap-around
termination
AEC-Q200 Qualified
Low inductance - less than 0.2nH
AEC-Q200 Qualified
All Pb-free parts comply with EU Directive 2011/65/EU (RoHS2)
Electrical Data
Electrical Data
Power rating at 70°C
LR1206
LR2010
LR2512
watts
0.5
1.0
1.5/2.0*
LR1206
LR2010
LR2512
Resistance range
ohms
0R010 to 1LR2010
R
0R003 to 1RLR2512 0R003 to 1R
LR1206
Power rating @70°C
watts
0.5
1
2
200
200
200
Power rating at 170°CDielectric withstanding voltage
watts
0v.o5lts
1.0
1.5/2.0*
Resistance range
ohms
R003 to 1R0
LR1206
LR2010
LR2512
T
C
R
p
p
m
/
°
C
±
1
0
0
(
C
o
n
t
a
c
t
f
a
c
t
o
r
y
f
o
r
v
a
l
u
e
b
e
l
o
w
0
.
0
5
0
o
hms)
R
e
s
i
s
t
a
n
c
e
r
a
n
g
e
o
h
m
s
0
R
0
1
0
t
o
1
R
0
R
0
0
3
t
o
1
R
0
R
0
0
3
t
o
1
R
Resistance tolerance1
%
<R01: 5, ≥R01: 1, 2, 5
Power rating at 70°C
watts
0.5%
1.≤R005
0
1.2,
5/25%
.0*
R
e
s
i
s
t
a
n
c
e
t
o
l
e
r
a
n
c
e
5%,
>R005
1,
Dielectric withstanding voltage
volts
200 R025–R047: <+200,2R015-R024:
00
200
≥R05: ±100,
<+300,
TCR
ppm/°C
Resistance range
ohms
0R010 °tC
o 1R
0R003 to 1R
R003 to 1R
Temperature rise at rated power
800.00
90
R01-R014:
TCR
ppm/°C
±1
00 (Conta<+500,
ct 4fa0cto<R01:
ry for<+900
value below
50 ohms)
Dielectricwithstand
withstandiPad
ng vand
oltag
e area for max power
volts
2mm
00 2
200
200
Dielectric
volts
200
trace
rating
@
70°C
30
30
100
Resistance tolerance
%
≤R005 5%, >R005 1, 2, 5%
TCR
ppm/°C
±100 (Con-55
tacttofa+150
ctory for value below 0.050 ohms)
Ambient
temperature range
°C
2
*2
Watts
with
total
solder
pad
and
trace
size
of
300
mm
Temperature rise at rated power
°C
40
80
90
2
Resistance tolerance
%
≤R005
5%, >R005
1, 2, 5%
Values
E24
preferred
2
Pad
and
trace
area
for
max
power
rating
@
70°C
mm
30
30
100
Temperaturerise
riseatarated
t ratepower
d power
°C
40
80
Temperature
°C
40
80
90 90
2
2
Pad
and trace
max power
rating
@ 70°C
30
30
Pad
/ trace
area3area
mm300
30 2
100
300 100
*2
Watts
with
totalfor
solder
pad and
trace
size of
mm mm
Electrical Data
Physical Data
2
Note
1: Contact
factory
value pad
– tolerance
combinations
outside
this
range. Note 2: Many values = N x R001 and N x R005 up to N=10 are also
*2 Watts
with
total for
solder
and trace
size of 300
mm
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
Physical Data
LR1206
Dimensions (mm)
LR2010
(mm)
SDimensions
iz e
LR2512
Size
LR1206
3.20±0.305
LR2010
5.23±0.38
LR1206
LR2010
L
L
3.20±0.305
5.23±0.38
6.50±0.38
LR2512
2.64±0.25
D
D
0.48±0.25
0.48±0.25
0.84
0.48±0.25
0.84
0.48±0.25
0.48±0.25
0.84
0.48±0.25
0.84
LL
Solder Plating
Protective Overcoat
Resistive Element
Copper Termination
ProtectiveOvercoat
Overcoat
Protective
Resistive Element
Resistive Element
Copper Termination
Copper Termination
2.0
Nickel Barrier Layer
Copper Wraparound
Termination
SolderPlating
Plating
Alumina Substrate
Solder
NickelBarrier
BarrierLayer
Layer
Nickel
Copper Wraparound Welwyn
Copper Wraparound
Termination
Termination
Alumina Substrate
Alumina Substrate
Components
A
B
C
4.0
1.25
B
3.05
6.5in product specification 1.5
Welwyn Components reserves
the right to make changes
without notice or liability.
All information is subject to Welwyn’s own data and is considered accurate at time of going to print.
LR2512Note
General
D
0.48±0.25
LR 1206 / 0.8
2010 / 2512
L
0.48±0.25
D
0.84
H (max)
General Note
LR2010
0.84
H (max)
0.8
D
Recommended Solder Pad Dimensions (mm)
A
LR1206
3.25±0.25
D
0.48±0.25
0.8
LLRR 11220066 // 22001100 // 22551122
W
W
H
H
LRC/LRF Series
5.23±0.38
H
i o` J i oc | bKè ñÇ= = NOLOPLMQ= = NMWMT= ^ j = = m~ÖÉ= O
Low Value Flat
Chip Resistor
1.63±0.20
W
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
6.50±0.38
LR2512
3.20±0.305
3.7 Limited · Bedlington,
7.75
1.5 UK
© Welwyn Components
Northumberland NE22 7AA,
C
A subsidiary of
TT electronics plc
04.10
Telephone:
+44 (0)
1670 822181
(0) 1670 829465
· Email:
· Website: www.welwyn-tt.com
Welwyn Components reserves
the right
to make
changes· Facsimile:
in product+44
specification
without
noticeinfo@welwyn-tt.com
or liability.
General
Note
All information
is subject to Welwyn’s own data and is considered accurate at time of going to print.
Temperature
Cycling
©4TT Electronics
plc
6
JESD22 Method JA-104
Moisture Resistance MIL-STD-202 Method 106
R% 0.25
R%
0.5
0.1
0.2
wer Rating
Welwyn Components reserves the right to make changes in product specification without notice or liability.
(%)
General
NoteisComponents
All
subject to Welwyn’s
own data
and is considered
accurate NE22
at time
of going
© information
Welwyn
Limited
· Bedlington,
Northumberland
7AA,
UK to print.
AEC-Q200
Telephone:
+44
(0) 1670
822181
· Facsimile:
(0) 1670
829465 ·without
Email: info@welwyn-tt.com
· Website: 100
www.welwyn-tt.com
TT
Electronics
reserves
theTable
right
to7make
changes+44
in product
specification
noticeMax.
or liability. Typ.
Method
(add
R05)
(@1R0)
©
Welwyn isComponents
Limited
Bedlington,
Northumberland
7AA,
UK to print.
Test
Allref
information
subject
to TT Electronics’
own· data
and is considered
accurateNE22
at time
of going
80
Telephone:
+44 (0)
1670
822181
· Facsimile:MIL-STD-202
+44 (0) 1670 829465
· Email:
· Website: www.welwyn-tt.com
3
High
Temp.
Exposure
Method
108info@welwyn-tt.com
R% 0.5 0.2
60
40
A subsidiary of
TT electronics plc
2
A subsidiary of
TT electronics04.10
plc
www.ttelectronicsresistors.com
04.10
12.15
23
23
Recommended Solder Pad Dimensions (mm)
A
Low Value Flat
LR2010
Chip
Resistor
C
2.0
4.0
1.25
3.05
6.5
1.5
LR1206
B
Make Possible
C
3.7
7.75
AEC-Q200 Table 7
Method
Test
High Temp. Exposure MIL-STD-202 Method 108
1.5
Typ.
(%)
100
R% 0.5
0.2
80
Max.
(add R05)
(@1R0)
4
Temperature Cycling
R% 0.25
0.1
6
Moisture Resistance MIL-STD-202 Method 106
R% 0.5
0.2
7
Biased Humidity MIL-STD-202 Method 103
R% 0.5
0.2
JESD22 Method JA-104
8 Operational Life (Cyclic Load) MIL-STD-202 Method 108
R%
14
R% 0.5
Vibration MIL-STD-202 Method 204
15 Resistance to Soldering Heat MIL-STD-202 Method 210
16
1
0.5
60
40
20
0.05
0
R% 0.25 0.05
R% 0.25
Thermal Shock MIL-STD-202 Method 107
J-STD-002
70
25
Solderability
21
Board Flex
AEC-Q200-005
R% 0.5
0.2
Terminal Strength
AEC-Q200-006
R% 0.25
0.1
Short Term Overload
6.25 x Pr for 2s
R% 0.5
Low Temperature Storage
-65°C for 100 hours
R% 0.5
Leach Resistance
Solder dip at 250°C
90s minimum
150 (°C)
Ambient temperature
0.1
18
22
Power Rating
LRLR2512
Series
ref
3
A
B
>95% coverage
LRC 25
12 2
1 watt
LRC 20
10 1
0.w
5 at
wat
t t
LRC 12
06 0.5
25ww
atat
tt
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.
2. Full AEC-Q200 qualification applies only to European Part Numbers at 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 L
R
F
1
2
0
6
R
0
Conventional (element up)
Values > R025
1
3
Flip-chip (element
down) 2
Values < R025
F
Size
1
Value (use IEC62 code)
Type
Tolerance (use IEC62 code)
2
Packing
W
T1
Tape
1206 or 2010
2512
All sizes
W
4
5
2
3
4
5
Size
Value
Tolerance
Termination & Packing
F = ±1%
G = ±2%
J = ±5%
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
LR = Conventional orientation 1206 E24 = 3/4
1%
(values >R025)
2010 characters
2%
2512 R = ohms
LRF
=
Flip-chip
orientation
5%
(values ≤R025)
F
G
J
F
3000/reel
1800/reel
1000/reel
Standard
USA (IRC) Part Number: LRC-LRF1206LF-01-R020-F (1206, 20 milliohms ±1%, Pb-free)
L
R
C
-
L
R
F
1
2
0
6
L
F
-
0
© Welwyn
Bedlington, Northumberland
NE22
1 Components Limited
2
3
4 7AA, UK
1
-
R
5
0
2
0
6
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
1
2
3
4
5
6
7
Family
Model
Size
Termination
TCR
Value
Tolerance
LRC
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)
F = ±1%
G = ±2%
J = ±5%
-
F
7
04.10
Packing
Standard packing is tape & reel
All sizes 1000/reel
1206 & 2010 3000/reel
1800/reel
2512
Standard
Nonstandard
Electrical
TT Electronics reserves theData
right to make changes in product specification without notice or liability.
General Note
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
© TT Electronics plc
Power rating @70°C
Resistance range1
watts
ohms
LR1206
0.5
LR2010
1
R003 to 1R0
www.ttelectronicsresistors.com
LR2512
2
12.15