WRM Datasheet, PDF (2/3 Pages) Welwyn Components Limited – Mini Melf Resistors

Mini Melf
Resistors
WRM Series
Welwyn Components
TCR and Tolerance Range
Type
Reference
WRM0102
WRM0102
WRM0102
WRM0102
WRM0102
WRM0204
WRM0204
WRM0204
WRM0204
WRM0204
WRM0207
WRM0207
WRM0207
WRM0207
WRM0207
TCR
±50ppm
±25ppm
±15ppm
±10ppm
±05ppm
±50ppm
±25ppm
±15ppm
±10ppm
±05ppm
±50ppm
±25ppm
±15ppm
±10ppm
±05ppm
5%
R22 – R91
–
–
–
–
R22 – R91
–
–
–
–
R22 – R91
–
–
–
–
2%
IRO – 9R1
–
–
–
–
–
–
–
–
–
–
–
–
–
–
Tolerance
1.0%
10R – 2.21M
10R – 221K
–
–
–
1R – 10M
10R – 475K
–
–
–
1R – 8.2M
–
–
–
–
0.5%
47RS – 221K
47R5 – 221K
100R – 100K
–
–
10R – 475K
10R – 475K
10R – 221K
–
–
10R – 1M
10R – 1M
–
–
–
* TC 10ppm & 5ppm is specified over the temperature range -10°C to +85°C.
0.25%
100R – 221K
100R – 221K
100R – 100K
–
–
22R – 332K
22R – 332K
22R – 221K
22R – 221K
100R – 100K
–
–
–
–
–
0.1%
–
100R – 100K
100R – 100K
–
–
43R – 332K
43R – 332K
43R – 221K
43R – 221K
100R – 100K
–
–
–
–
–
Performance Data
Test
Description
Short time overload*
Bending test*
Resistance to soldering heat
Temperature rapid change
Endurance*
Load life
1000h
8000 h
Climatic sequence*
Damp heat steady state*
Current noise
Solderability
Voltage coefficient
Voltage proof
0.25
75 Ω – <100 kΩ
≤ 0.05% + 0.01 Ω
≤ 0.05% + 0.01 Ω
≤ 0.05% + 0.01 Ω
≤ 0.05% + 0.01 Ω
Results ∆ R/R ±
Stability class
0.5
10 Ω – <75 Ω
>100 kΩ – 332 kΩ
≤ 0.1% + 0.01 Ω
≤ 0.1% + 0.01 Ω
≤ 0.1% + 0.01 Ω
≤ 0.1% + 0.01 Ω
≤ 0.25% + 0.05 Ω
≤ 0.5% + 0.05 Ω
≤ 0.25% + 0.05 Ω
≤ 0.25% + 0.05 Ω
< 0.05 µV/V
200V
≤ 0.25% + 0.05 Ω
≤ 0.5% + 0.05 Ω
≤ 0.5% + 0.05 Ω
≤ 0.5% + 0.05 Ω
< 0.25 µV/V
Dipped area shall be covered with a smooth
and bright solder coating of at least 96%
< 0.5 . 10⁶/V
300V
* Resistors to be mounted on a PC-board according to IEC 115-1, clause 4.27.1
1.0
0.22 Ω – <10 Ω
>332 kΩ – 10 MΩ
≤ 0.25% + 0.05 Ω
≤ 0.25% + 0.05 Ω
≤ 0.25% + 0.05 Ω
≤ 0.25% + 0.05 Ω
≤ 0.5% + 0.05 Ω
≤ 1.0% + 0.05 Ω
≤ 1.0% + 0.05 Ω
≤ 1.0% + 0.05 Ω
< 3 µV/V
500V
© Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK
Telephone: [phone] · Facsimile: [phone] · Email: [e-mail] · Website: www.welwyn-tt.com
Issue D · 09.06