WH50 3R3JI Welwyn Components, WH50 3R3JI Datasheet - Page 3

• Manufacturer Part Number: WH50 3R3JI
• Description: RESISTORS, 50W 5% 3R3RESISTOR, 50W 5% 3R3
• Manufacturer: Welwyn Components
• Series: WH50r

Specifications of WH50 3R3JI

• Resistors Element Type: WIREWOUND ALUMINUM CLAD
• Resistance: 3.3R
• Power Rating: 50W
• Tolerance, +: 5%
• Tolerance, -: 5%
• Temp, Op. Max: 275(DEGREE C)
• Temp, Op. Min: -55(DEGREE C)
• Rohs Compliant: YES

Aluminium Housed
Wirewound Resistors
WH Series
Application Notes
Reference aluminium heatsink dimension
Aluminium thickness 1mm
Reference chassis
WH50 only
To load at maximum commercial rating (50W) mount on
heatsink 30.5cm x 30.5cm x 1.5mm.
Derating must be applied when resistors are mounted on a
heat sink of smaller dimensions than defined in Graph 1.
It is recommended that the resistor base should be coated
with heatsink compound before mounting to obtain the
stated operating characteristics.
The heatsink compound increases thermal conductivity to the
heatsink.
After soldering care should be taken to ensure that there are
no flux residues on the moulding compound, otherwise
insulation resistance will be reduced.
Packaging
Resistors are packed in plastic bags and boxed for maximum
protection.
© Welwyn Components Limited
Telephone: [phone] · Facsimile: [phone] · Email: [e-mail] · Website: www.welwyn-tt.com
CECC 40203-006
AA (WH5)
BA (WH10)
CA (WH25)
DA (WH50)
L
15.5
cm
18
L
cm
10
13
W
Bedlington, Northumberland NE22 7AA, UK
cm
H
5
5
W
area sq. cm
Reference
410
544
H
Graph 1
50
40
30
20
10
5 10
Heatsink Surface Area (cm
Welwyn Components
50 100
CECC 40 STYLE
410cm
2
)
544cm
2
500 1000
2
Issue D · 03.06
BA
AA
DA
CA
109