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

Issue E · 12.04

Welwyn Components

Characteristics

Test Method

Performance

Thermal Shock

MIL-STD-202 Method 107

±0.5%

Condition B, -65°C +125°C

Short Time

MIL-PRF-55342

±0.5%

Overload

High Temperature

MIL-PRF-55342

±0.5%

Exposure

Temperature

MIL-STD-883 Method 1010

±0.25%

Cycling

Test Condition B

Moisture

MIL-PRF-55342

±0.5%

Load Life

MIL-PRF-55342

±1.0%

Rated Power @ 70°C

Low Temperature

MIL-PRF-55342

±0.5%

Operation

Low Temperature

-65°C, 100 Hours

±0.5%

Storage

Resistance to

MIL-STD-202 Method 210

±0.25%

Solder Heat

Leach Resistance

Molten Solder 250°C

90 seconds

minimum

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

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:

For resistance values R025 and below part will be supplied as type LRF.

Components must be mounted with resistance value marking face up to ensure correct resistance value and tolerance.

A

C

B

LRC-LRF_E.qxd

12/23/04

10:07 AM

Page 2

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