LRLRCC 1206 0.5 w 1206 0.25 wattatt
LRC 2010 1 wLRC 2010 0.5 wattatt
LRC 2512 1 wLRC 2512 2 wattatt
i o ` J i o c | b K = = NOLOPLMQ= = NMWMT= ^j = = m~= N
i o ` J i o c | b K = = NOLOPLMQ= = NMWMT= ^j = = m~= N
i o ` J i o c | b K = = NOLOPLMQ= = NMWMT= ^j = = m~= N
Low Value Flat
Resistors
Low Value Flat
Make Possible
Welwyn Components
Chip Resistor
Welwyn Components
Chip Resistor
Low Value Flat Chip Resistor
Low Value Flat
LRC/LRF Series
LR Series
Welwyn Components
Chip Resistor
LRC/LRF Series
Standard 2512, 2010 and 1206 sizes
Standard 2512, 2010 and 1206 sizes
Resistance values down to 0.003 ohms
Standard 2512, 2010 and 1206 sizes
Resistance values down to 0.003 ohms
Leach resistant solder-plated copper
Resistance values down to 0.003 ohms
LRC/LRF Series
Leach resistant solder-plated copper wrap-around termination
wrap-around termination
Leach resistant solder-plated copper
Standard 2512, 2010 and 1206 sizes
AEC-Q200 Qualified
Low inductance - less than 0.2nH
wrap-around termination
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
LR1206 LR2010 LR2512
Electrical Data
Power rating at 70C watts 0.5 1.0 1.5/2.0*
LR1206 LR2010 LR2512
Resistance range ohms 0R010 to 1R 0R003 to 1R 0R003 to 1R
LR1206 LR2010 LR2512
Electrical Data
Power rating @70C watts 0.5 1 2
Dielectric withstanding voltage volts 200 200 200
Power rating at 70C watts 0.5 1.0 1.5/2.0*
1
Resistance range ohms R003 to 1R0
LR1206 LR2010 LR2512
TCR ppm/C 100 (Contact factory for value below 0.050 ohms)
Resistance range ohms 0R010 to 1R 0R003 to 1R 0R003 to 1R
1
Resistance tolerance % <R01: 5, R01: 1, 2, 5
Power rating at 70C watts 0.5 1.0 1.5/2.0*
Resistance tolerance % R005 5%, >R005 1, 2, 5%
Dielectric withstanding voltage volts 200 200 200
R05: 100, R025R047: <+200, R015-R024: <+300,
TCR ppm/C
Resistance range ohms 0R010 to 1R 0R003 to 1R 0R003 to 1R
Temperature rise at rated power C 40 80 90
R01-R014: <+500, <R01: <+900
TCR ppm/C 100 (Contact factory for value below 0.050 ohms)
Dielectric withstanding voltage volts 200 200 200
2
Dielectric withstand volts 200
Pad and trace area for max power rating @ 70C mm 30 30 100
Resistance tolerance % R005 5%, >R005 1, 2, 5%
TCR ppm/C 100 (Contact factory for value below 0.050 ohms)
Ambient temperature range C 2 -55 to +150
Temperature rise at*2 ra tWedatts pow wither total solder pad and trace size ofC 300 mm 40 80 90
2
Resistance tolerance % R005 5%, >R005 1, 2, 5%
Values E24 preferred
2
Pad and trace area for max power rating @ 70C mm 30 30 100
TemperTempearaturtue rre ise arise t rata rtaed poted pwoerwer C 40C 40 80 80 90 90
2
3 2 2
Pad / trPad andace ar traceea area for max power rating @ 70C mm mm30 30 100 30 300 100
*2 Watts with totalPhysical solder pad and Dat tracea size of 300 mm
2
Not*2 e 1: CWattson tacwitht fac totaltory f solderor value t padoler andanc e ctraceombina sizetions outside this r of 300 mm ange. Note 2: Many values = N x R001 and N x R005 up to N=10 are also
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) D
Physical Data
Physical Data
LR1206
3.200.305 1.630.20 0.8 0.480.25
Dimensions (mm)
LR2010 5.230.38 2.640.25 0.84 0.480.25
Dimensions (mm)
Size L W H (max) D
LR2512 6.500.38 3.250.25
0.84 0.480.25
Size L W H (max) D
LR1206 3.200.305 1.630.20 0.8 0.480.25
LR1206 LR 1206 / 2010 / 2512
3.200.305 1.630.20 0.8 0.480.25
LR2010 5.230.38 2.640.25 0.84 0.480.25
LR2010 5.230.38 2.640.25 0.84 0.480.25
W
L
LR2512 6.500.38 3.250.25
0.84 0.480.25
LR2512 6.500.38 3.250.25 0.84 0.480.25
LR 1206 / 2010 / 2512
LR 1206 / 2010 / 2512
H
i o ` J i o c | b K = = NOLOPLMQ= = NMWMT= ^j = = m~= O
W
L
W
L
D
Solder Plating
H
H
Nickel Barrier Layer
Protective Overcoat
Copper Wraparound
Low Value Flat Resistive Element
Termination
D Copper Termination
D
Solder Plating
Alumina Substrate
Solder Plating
Chip Resistor
Nickel Barrier Layer
Nickel Barrier Layer
Protective Overcoat
Protective Overcoat
Welwyn Components
Copper Wraparound
LRC/LRF Series Resistive Element
Copper Wraparound
Resistive Element
Termination
Copper Termination
Termination
Copper Termination
Alumina Substrate
Alumina Substrate
Recommended Solder Pad Dimensions (mm)
A
A B C
LR1206 2.0 4.0 1.25
B
General Note
LR2010 Welwyn Components reserves3.0 the5 right to make changes6. 5in product specification 1.5without notice or liability.
A subsidiary of
All information is subject to Welwyns own data and is considered accurate at time of going to print.
C
TT electronics plc
LR2512 3.7 7.75 1.5
Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK
General Note
Telephone: +44 (0) 1670 822181 Facsimile: +44 (0) 1670 829465 Email: info@welwyn-tt.com Website: www.welwyn-tt.com 04.10
Welwyn Components reserves the right to make changes in product specification without notice or liability.
General Note
All information is subject to Welwyns own data and is considered accurate at time of going to print. A subsidiary of
Welwyn Components reserves the right to make changes in product specification without notice or liability. TT electronics plc
23
General Note (%)
A subsidiary of
All informationWelwyn isComponents subject to Welwyn Limiteds own data Bedlington, and is conside Northumberlandred accurate NE22at time 7AA, of going UK to print.
AEC-Q200 Table 7
Telephone: +44 (0) 1670 822181 Facsimile: +44 (0) 1670 829465 Email: info@welwyn-tt.comMax. Typ. Website: www.welwyn-tt.com TT electronics04.10 plc
TT Electronics reserves the right to make changes in product specification without notice or liability. 100
Method
(add R05) (@1R0)
Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK
ref Test
All information is subject to TT Electronics own data and is considered accurate at time of going to print.
80 23
Telephone: +44 (0) 1670 822181 Facsimile: +44 (0) 1670 829465 Email: info@welwyn-tt.com Website: www.welwyn-tt.com www.ttelectronicsresistors.com04.10
3 High Temp. Exposure MIL-STD-202 Method 108 R% 0.5 0.2
4 Temperature Cycling JESD22 Method JA-104 R% 0.25 0.1
TT Electronics plc
60
23
6 Moisture Resistance MIL-STD-202 Method 106 R% 0.5 0.2 07.14
40
7 Biased Humidity MIL-STD-202 Method 103 R% 0.5 0.2
8 Operational Life (Cyclic Load) MIL-STD-202 Method 108 R% 1 0.5 20
14 Vibration MIL-STD-202 Method 204 R% 0.5 0.05
0
25 70 150 (C)
15 Resistance to Soldering Heat MIL-STD-202 Method 210 R% 0.25 0.05
Ambient temperature
16 Thermal Shock MIL-STD-202 Method 107 R% 0.25 0.1
18 Solderability J-STD-002 >95% coverage
21 Board Flex AEC-Q200-005 R% 0.5 0.2
22 Terminal Strength AEC-Q200-006 R% 0.25 0.1
Short Term Overload 6.25 x Pr for 2s 0.5
R%
Low Temperature Storage -65C for 100 hours R% 0.5
Leach Resistance Solder dip at 250C 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.
2. Full AEC-Q200 qualification applies only to European Part Numbers at ohmic values R01.
Ordering Procedure
Example: LRF2512 at 10 milliohms (hence flip-chip mounted) and 2% tolerance on a reel of
1800 pieces
L R F 2 5 1 2 R 0 1 G W
Type
Mounting
Conventional (element up) Values > R025
F Flip-chip (element down)
Values < R025
Size
Value (use IEC62 code)
Tolerance (use IEC62 code)
F 1%
G 2%
J 5%
Packing
1206 or 2010 3000/reel
W Standard
Tape 2512 1800/reel
T1 All sizes 1000/reel
Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 Facsimile: +44 (0) 1670 829465 Email: info@welwyn-tt.com Website: www.welwyn-tt.com 04.10
Power RatingLRLRCC 1206 0.5 w 1206 0.25 wattatt
LRC 2010 1 wLRC 2010 0.5 wattatt
LRC 2512 1 wLRC 2512 2 wattatt
i o ` J i o c | b K = = NOLOPLMQ= = NMWMT= ^j = = m~= O
Low Value Flat
Chip Resistor
Welwyn Components
LRC/LRF Series
Recommended Solder Pad Dimensions (mm)
A
A B C
LR1206 2.0 4.0 1.25
Low Value Flat
B
LR2010 3.05 6.5 1.5
Chip Resistor Make Possible
C
LR Series
LR2512 3.7 7.75 1.5
(%)
AEC-Q200 Table 7
Max. Typ.
100
Method
(add R05) (@1R0)
ref Test
80
3 High Temp. Exposure MIL-STD-202 Method 108 R% 0.5 0.2
4 Temperature Cycling JESD22 Method JA-104 R% 0.25 0.1
60
6 Moisture Resistance MIL-STD-202 Method 106 R% 0.5 0.2
40
7 Biased Humidity MIL-STD-202 Method 103 0.5 0.2
R%
8 Operational Life (Cyclic Load) MIL-STD-202 Method 108 R% 1 0.5 20
14 Vibration MIL-STD-202 Method 204 R% 0.5 0.05
0
70
25 150 (C)
15 Resistance to Soldering Heat MIL-STD-202 Method 210 R% 0.25 0.05
Ambient temperature
16 Thermal Shock MIL-STD-202 Method 107 0.25 0.1
R%
18 Solderability J-STD-002 >95% coverage
21 Board Flex AEC-Q200-005 R% 0.5 0.2
22 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 -65C for 100 hours R% 0.5
Leach Resistance Solder dip at 250C 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.
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:
L R F 2 5 1 2 R 0 1 G W
ETuyrpope ean (Welwyn) Part Number: LRF1206-R02FW (1206, 20 milliohms 1%, Pb-free)
Mounting
L R F 1 2 0 6 - R 0 2 F W
Conventional (element up) Values > R025
F Flip-chip 1(element down) 2 3 4 5
Values < R025
Size
1 2 3 4 5
Value (use IEC62 code)
Type Size Value Tolerance Termination & Packing
Tolerance (use IEC62 code)
1206 F = 1% W Pb-free, standard packing
F 1%L R = Conventional orientation E24 = 3/4
G 2% (values >R025)
2010 characters G = 2% T1 Pb-free, 1000/reel (non-standard)
J 5% R = ohms
LRF = Flip-chip orientation 2512 J = 5% PB SnPb finish, standard packing
(values R025) Standard packing is tape & reel
Packing
1206 & 2010 3000/reel
1206 or 2010 3000/reel
W Standard
2512 1800/reel
Tape 2512 1800/reel
T1 All sizes 1000/reel
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 1 - R 0 2 0 - F
Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 Facsimile: +44 (0) 1670 829465 Email: info@welwyn-tt.com Website: www.welwyn-tt.com 04.10
1 2 3 4 5 6 7
1 2 3 4 5 6 7
Family Model Size Termination TCR Value Tolerance Packing
LRC 1206 Omit for SnPb F = 1%
LR = Conventional orientation 4 characters Standard packing is
01 = standard
(values >R025) R = ohms tape & reel
2010 LF = Pb-free (100ppm/C G = 2%
values R05)
2512 J = 5% 1206 & 2010 3000/reel
LRF = Flip-chip orientation
(values R025)
2512 1800/reel
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.
Electrical Data
www.ttelectronicsresistors.com
TT Electronics plc
07.14
LR1206 LR2010 LR2512
Power rati ng @70C watt s 0.5 1 2
1
Resistance range ohms R003 to 1R0
1
Resistance tolerance % <R01: 5, R01: 1, 2, 5
R05: 100, R025R047: <+200, R015-R024: <+300,
TCR ppm/C
R01-R014: <+500, <R01: <+900
Dielectric withstand volts 200
Ambient temperature range C -55 to +150
2
Values E24 preferred
Temperature rise at rated power C 40 80 90
3 2
Pad / trace area mm 30 100 300
Note 1: Contact factory for value tolerance combinati ons outside this range. Note 2: Many values = N x R001 and N x R005 up to N=10 are also
available. Note 3: Recommended minimum pad & adjacent trace area for each termination for rated dissipati on on FR4 PCB
Power Rating