Low Value Flat

Chip Resistor

LR Series

06.17

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 plc

www.ttelectronics.com/resistors

BI Technologies IRC Welwyn

Low Value Flat

Chip Resistor

LR Series

Low Value Flat

Chip Resistor

LRC/LRF Series

Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com

04.10

Welwyn Components

Recommended Solder Pad Dimensions (mm)

A

B

C

LR1206

2.0

4.0

1.25

LR2010

3.05

6.5

1.5

LR2512

3.7

7.75

1.5

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.

A

C

B

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LRC 2512 1 w

att

LRC 2512 2 w

att

LRC 2010 0.5

watt

LRC 2010 1 w

att

LRC 1206

0.25 watt

LRC 1206

0.5 watt

25

70

150 (°C)

0

20

40

60

80

100

(%)

Ambient temperature

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)

Size

Value (use IEC62 code)

Tolerance (use IEC62 code)

F

1%

G

2%

J

5%

Packing

W

Tape

1206 or 2010

3000/reel

Standard

2512

1800/reel

T1

All sizes

1000/reel

Values < R025

AEC-Q200 Table 7

Method

Max.

(add R05)

Typ.

(@1R0)

ref

Test

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

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

8 Operational Life (Cyclic Load) MIL-STD-202 Method 108

R%

1

0.5

14

Vibration MIL-STD-202 Method 204

R% 0.5 0.05

15 Resistance to Soldering Heat MIL-STD-202 Method 210

R% 0.25 0.05

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

R% 0.5

Low Temperature Storage

-65°C for 100 hours

R% 0.5

Leach Resistance

Solder dip at 250°C

90s minimum

Ordering Procedure

This product has two valid part numbers:

European (Welwyn) Part Number: LRF1206-R02FW (1206, 20 milliohms ±1%, Pb-free)

L

R

F

1

2

0

6

-

R

0

2

F W

1

2

3

4

5

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

1

2

3

4

5

6

7

Electrical Data

LR1206

LR2010

LR2512

Power rating @70°C

watts

0.5

1

2

ohms

R003 to 1R0

%

<R01: 5, ≥R01: 1, 2, 5

TCR

ppm/°C

≥R05: ±100, R025–R047: <+200, R015-R024: <+300,

R01-R014: <+500, <R01: <+900

Dielectric withstand

volts

200

Ambient temperature range

°C

-55 to +150

Values

Temperature rise at rated power

°C

40

80

90

30

100

300

Note 1: Contact factory for value – tolerance combinations 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 dissipation on FR4 PCB

1

2

3

4

5

Type

Size

Value

Tolerance

Termination & Packing

LR = Conventional orientation

(values >R025)

1206 E24 = 3/4

characters

R = ohms

F = ±1%

W

Pb-free, standard packing

2010

G = ±2%

T1 Pb-free, 1000/reel (non-standard)

LRF = Flip-chip orientation

(values ≤R025)

2512

J = ±5%

PB

SnPb finish, standard packing

Standard packing is tape & reel

1206 & 2010

3000/reel

2512

1800/reel

1

2

3

4

5

6

7

Family

Model

Size Termination

TCR

Value

Tolerance

Packing

LRC LR = Conventional orientation

(values >R025)

1206 Omit for SnPb 01 = standard

(±100ppm/°C

values ≥R05)

4 characters

R = ohms

F = ±1%

Standard packing is tape & reel

2010 LF = Pb-free

G = ±2%

LRF = Flip-chip orientation

(values ≤R025)

2512

J = ±5%

1206 & 2010

All sizes

3000/reel

1000/reel Standard

1800/reel

Non-

standard

2512

Make Possible

12.15

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 plc

www.ttelectronicsresistors.com