Low Value Flat

Chip Resistor

LR Series

09.18

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

© 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

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

LRC 2512 1 w

att

LRC 2512 2 w

att

LRC 2010 0.5 watt

LRC 2010 1 w

att

LR C 1206 0.25

w att

LR C 1206 0.5

w att

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 ra ng @70°C

wa s

0.5

1

2

Resistance range1

ohms

R003 to 1R0

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%

Pb-free

Pb-free

All sizes

Pb-free

1000/reel

Pb-free

Make Possible

12.15

General Note

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

3000/reel

1800/reel

1206 & 2010

Pb-free

2512

Pb-free

SnPb

Pb-free