WRM0204D-1K0FI [TTELEC]
Mini Melf Resistors; 微型晶圆电阻电阻
| 型号： | WRM0204D-1K0FI |
| 厂家： | 
TT Electronics |
| 描述： | Mini Melf Resistors |
| 文件： | 总3页 (文件大小：705K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Mini Melf
Resistors
Welwyn Components
WRM Series
• High reliability
Predictable pulse handling capability
•
Tolerances down to 0.1%
•
TCR down to 5 ppm/°C
•
Electrical Data
WRM 0102
0.2
WRM 0204
WRM 0207
0.4
Power rating at 70°C
Resistance range
watts
ohms
volts
0.25
R22 – 10M
200
R22 – 2M21
150
R22 – 8M2
250
Limiting element voltage
TCR
ppm/°C
%
15, 25, 50
5, 15, 25, 50
0.1, 0.25, 0.5, 1.0, 2, 5
E24 & E96
200
25, 50
Resistance tolerance
Standard values
Thermal impedance
Ambient temperature range
Insulation resistance
k/W
°C
250
140
-55 to +125
>1010
ohms
Physical Data
Dimensions (mm) and weight (g)
L
Type
L
D
max
D1
max
K
min
Weight
max
D1
L1
D
WRM 0102
WRM 0204
WRM 0207
2.2
3.6
6.0
1.1
1.4
2.2
1.1
1.4
2.2
0.35
0.5
0.01
0.02
0.08
K
1.1
Construction
A metal film is deposited onto a high dissipation ceramic
Terminations
Material
Plated steel cap.
former to which tin plated teminating caps are fitted.
Solderability The pure tin finish produces ageing free
contacts on which low melting solders can
be used. Dipped area shall be covered with
a smooth and bright solder coating after
3 seconds immersion at 215°C.
The resistor is adjusted to value by a helical cut in the film
and the body is protected by a lacquer coating.
Marking
Resistance values are colour coded with 4 or 5 bands
depending on type.
Solvent Resistance
The body protection and marking are resistant to all normal
industrial cleaning solvents suitable for printed circuit boards.
General Note
Welwyn Components reserves the right to make changes in product specification without notice or liability.
All information is subject to Welwyn’s own data and is considered accurate at time of going to print.
A subsidiary of
TT electronics plc
© 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 D · 09.06
Mini Melf
Resistors
WRM Series
Welwyn Components
TCR and Tolerance Range
Type
TCR
Tolerance
Reference
5%
2%
1.0%
0.5%
0.25%
0.1%
WRM0102
WRM0102
WRM0102
WRM0102
WRM0102
WRM0204
WRM0204
WRM0204
WRM0204
WRM0204
WRM0207
WRM0207
WRM0207
WRM0207
WRM0207
50ppm
25ppm
15ppm
10ppm
05ppm
50ppm
25ppm
15ppm
10ppm
05ppm
50ppm
25ppm
15ppm
10ppm
05ppm
R22 – R91
IRO – 9R1
10R – 2.21M
47RS – 221K
100R – 221K
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
10R – 221K
47R5 – 221K
100R – 221K
100R – 100K
–
–
100R – 100K
100R – 100K
100R – 100K
–
–
–
–
–
–
–
–
–
–
R22 – R91
1R – 10M
10R – 475K
22R – 332K
43R – 332K
–
10R – 475K
10R – 475K
22R – 332K
43R – 332K
–
–
10R – 221K
22R – 221K
43R – 221K
–
–
–
22R – 221K
43R – 221K
–
–
–
100R – 100K
100R – 100K
R22 – R91
1R – 8.2M
10R – 1M
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
10R – 1M
–
–
–
* TC 10ppm & 5ppm is specified over the temperature range -10°C to +85°C.
Performance Data
Test
Results ∆ R/R
Stability class
Description
0.25
0.5
1.0
10 Ω – <75 Ω
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
75 Ω – <100 kΩ
≤ 0.05% + 0.01 Ω
≤ 0.05% + 0.01 Ω
≤ 0.05% + 0.01 Ω
≤ 0.05% + 0.01 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
Short time overload*
Bending test*
Resistance to soldering heat
Temperature rapid change
Endurance*
Load life
1000h
8000 h
≤ 0.25% + 0.05 Ω
≤ 0.5% + 0.05 Ω
≤ 0.25% + 0.05 Ω
≤ 0.25% + 0.05 Ω
< 0.05 µV/V
≤ 0.25% + 0.05 Ω
≤ 0.5% + 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
Climatic sequence*
Damp heat steady state*
Current noise
≤ 0.5% + 0.05 Ω
≤ 0.5% + 0.05 Ω
< 0.25 µV/V
Solderability
Dipped area shall be covered with a smooth
and bright solder coating of at least 96%
< 0.5 . 106/V
Voltage coefficient
Voltage proof
200V
300V
500V
* Resistors to be mounted on a PC-board according to IEC 115-1, clause 4.27.1
© 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 D · 09.06
Mini Melf
Resistors
WRM Series
Welwyn Components
Single Pulse
Maximum Pulse Load
WRM 0102
WRM 0204
WRM 0207
100
W
10
1
0,1
10 µs
100 µs
1 ms
10 ms
100 ms
1 s
10 s
Pulse Duration ti
Continuous Pulses
Maximum Pulse Load
WRM 0102
WRM 0204
WRM 0207
100
W
10
1
0,1
10 µs
100 µs
1 ms
10 ms
100 ms
1 s
10 s
Pulse Duration ti
Packaging
The WRM 0102 and 0204 resistors are supplied reeled on 8mm blister tape.
WRM 0207 resistors are supplied on 12mm blister tape.
Packaging complies with the requirements of IEC 286-3.
Ordering Procedure
Example: WRM0204 at 1 kilohm, 1% tolerance and 50ppm/ºC TCR on a reel of 3000 pieces -
Type
Size
TCR
WRM
0204
C
-
1K0
F
I
Packing
0102 3000 / reel (7”)
C
D
Y
50ppm/ºC
25ppm/ºC
15ppm/ºC
T
10ppm/ºC
5ppm/ºC
I
Tape
0204 3000 / reel (7”)*
0207 1500 / reel (7”)
Standard
V
* High precision parts may be supplied on 1000 piece reels – please enquire
Value (use IEC62 code)
Tolerance (use IEC62 code)
B
0.1%
D
F
0.5%
1%
G
J
2%
5%
C
0.25%
© 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 D · 09.06
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