CR251210MF 데이터 시트보기 (PDF) - Welwyn Components Limited

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CR251210MF

Surface Mounted Resistors

Welwyn Components Limited 

Surface Mounted

Resistors

CR Series

Welwyn Components

Application Notes

Operating Temperature Range

The chips themselves can operate at a maximum temperature

of 155°C (see performance claims above). For soldered chips,

the joint temperature should not exceed 110°C. This

condition is met when the stated power levels at 70°C are

used.

Packaging

Wrap-around Termination

Chip resistors are supplied taped and reeled on standard

8mm tape to IEC 286-3.

Quantity per reel; 3000 max.

Mounting

This chip resistor is ideally suited for handling by automatic

methods due to its rectangular shape and the small

dimensional tolerances. Electrical connection to a ceramic

substrate or to a printed circuit board can be made by wire

bonding (eg suffix ‘G’ in CR0805G) or by reflow soldering of

wrap-around terminations (eg suffix ‘F’ in CR0805F).

Planar Terminations

Resistor chips are supplied in waffle packs.

The ‘F’ terminations provide good leach properties and ensure

reliable contact. Due to the robust construction the resistor

chip can be immersed in the solder bath for 30 seconds at

260°C. This enables the resistor to be mounted on one side

of a printed circuit board and other wire-leaded components

on the other side.

Ordering Procedure

Specify type reference, value and tolerance as shown in this example of CR0805 10M 0.1%:

Type

CR0805 10M

B

Resistance value

(IEC62 code)

Tolerance

(IEC62 code)

B

0.1%

C

0.25%

D

0.5%

F

1%

G

2%

J

5%

© 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

Issue F · 10.05

19

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