Bi LRF3W-R05JW Low value 3w chip resistor Datasheet

Low Value 3W
Chip Resistors
Welwyn Components
LRF3W Series
•
•
•
3 Watts @ 70°C
Resistance range from 0.003 to 0.1Ω
Tolerances to ±1%
Electrical Data
Value
Power dissipation @70°C
Resistance Range
100
% Of Power Rating
Characteristic
Power Derating Curve
3 Watts
0.005 to 0.100Ω
Dielectric withstand
200V
Ambient temp range
-55 to +150°C
Resistance tolerance
≤R005 5%, >R005 2, 5%,
≥R01 1, 2, 5%
TCR
60
40
20
0
±100ppm/°C
Pad & trace area for maximum
power rating*
80
25°
70°
Temperature in °C
150°
300mm2
Physical Data
Top
Bottom
(Board Side)
Recommended
Solder Pad Layout
0.81 ± 0.13mm
0.51 ± 0.13mm
Plating
wrap-around
2.29
± 0.13mm
7.6mm
6.35 ± 0.13mm
2mm
1mm
0.94 mm max
thickness
3.18 ± 0.13mm
Weight 0.065g typ.
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: [email protected] · Website: www.welwyn-tt.com
84
Issue D · 07.06
Low Value 3W
Chip Resistors
Welwyn Components
LRF3W Series
Chips can withstand immersion in solder at 250°C for
90 seconds and are suitable for reflow or wave soldering
mounting applications.
Construction
Patented non-noble copper based thick film material,
overglaze and organic protection are screen printed on a 96%
alumina substrate. The components are laser trimmed to
achieve the required resistance tolerance.
Marking
The body protection and marking are resistant to all normal
industrial cleaning solvents suitable for printed circuits.
Chips are packed and mounted with marking side up.
The LRF3W Chips are mounted with the actual resistor
element mounted face down on its termination pads.
Terminations
The wrap-around terminations have an electroplated nickel
barrier and matte tin finish, this ensures excellent ‘leach’
resistance properties and solderability.
Performance Data
Typical
Load at rated power: 1000 hours at 70°C MIL-PRF-55342
∆R%
1
Overload: 6.25 x rated power for 2 seconds MIL-PRF-55342
∆R%
0.5
High temperature exposure: MIL-PRF-55342
∆R%
0.5
Low temperature operation: MIL-PRF-55342
∆R%
0.5
Low temperature storage: -65°C, 100 hours
∆R%
0.5
Moisture: MIL-PRF-55342
∆R%
0.5
Temperature cycling: MIL-STD-883 Method 1010 Test condition B
∆R%
0.25
Thermal shock: MIL-STD-202 Method 107 condition B -65°C +125°C
∆R%
0.25
Resistance to solder heat: MIL-STD-202 Method 210
∆R%
0.25
Shelf life test: 12 months at room temperature
∆R%
0.1
Leach resistance: molten solder 250°C
90 Seconds min.
Packaging
LRF3W Resistors are supplied taped and reeled as per IEC 286-3. The standard quantity per reel is 1800 parts.
T2
P0
D0
T
13 ± 0.5mm
33 ± 1.0
G
B0
80 ± 2
178 ± 2
F
13 ± 0.5
W
E
Marking
(Both sides)
P2
T1
0.8 ± 0.15
2.5 ± 0.5
A0
K0
D1
P1
Tape dimensions in mm
LRF3W
W
±0.3
12
P1
±0.1
8
P0
±0.1
4
P2
±0.05
2
D0
±0.1
1.5
D1
±0.2
1.5
E
±0.1
1.75
F
±0.05
5.5
A0
±0.1
3.61
B0
±0.1
6.96
© Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: [email protected] · Website: www.welwyn-tt.com
K0
±0.1
1.17
T
±0.05
0.28
T1
nom
0.06
T2
±0.15
1.45
Issue D · 07.06
85
Low Value 3W
Chip Resistors
Welwyn Components
LRF3W Series
Ordering Procedure
Specify type reference, value and tolerance as shown in this example of LRF3W 5mΩ 2%:
Type
LRF3W
R005
G
Resistance value
(IEC62 code)
Tolerance
(IEC62 code)
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: [email protected] · Website: www.welwyn-tt.com
86
Issue D · 07.06
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