Ohmite 50 Series Data Sheet
50 Series
123 4
% Rated Power
Ambient Temperature, °C
3500 5025 100 150 200 250 300
40
0
60
80
20
100
Economical Silicone Coated Wirewound
Automated winding, in-line color
banding, and testing allow for an
economically priced, industrial
grade wirewound power resistor.
These resistors feature an all
welded construction with a high
purity alumina ceramic core and
high quality RoHS grade tinned
copper wire instead of copper
weld which produces better
thermal characteristics. The 50
series accompanies Ohmite's
wide range of axial leaded products.
Series Power at 25°C Resistance Limiting Element Voltage
53J 3W 0R1 to 10K 150
55J 5W 0R1 to 20K 200
Temp. Coefficient
of Resistance
Short Term
Overload
±90 ppm/°C for below 1.0 Ω
±50 for 1.0 Ω to 99 Ω
±30 for 100 Ω and above
53J 5X for 5 seconds
55J 10X for 5 seconds
Tin Coated Copper
Leads
FEATURES
• Ruggedconstruction
• OptimizedforMedium
to High volume production
• Customresistance
values can also be
produced on request.
SERIES SPECIFICATIONS
CHARACTERISTICS
Test Condition Maximum ∆R
Short term overload
Load life at rated power
Robustness of termination
5X Rated power for 5 seconds (3W); 10X Rated power
for 5 seconds (5W)
1000 hours (1.5 Hrs ON, 0.5
Hrs OFF cycle)
As per BS-CECC 40201-002 <1% + 0R05
<2% + 0R05
<5% + 0R05
Derating
6
Key to four-band code
Band 1 2 3 4
Color Digit Multiplier Tolerance
Black 0 0 x 1Ω
Brown 1 1 x 10Ω ± 1% (F)
Red 2 2 x 100Ω ± 2% (G)
Orange 3 3 x 1KΩ ± 3%
Yellow 4 4 x 10KΩ ± 4%
Green 5 5 x 100KΩ
Blue 6 6
Violet 7 7
Grey 8 8
White 9 9
Gold x 0.1Ω ± 5% (J)
Silver x 0.01Ω ± 10% (K)
50 Series
D max.
L 38mm**
0-3mm
d
53N JR10E-TR
50 Series
Tolerance
J=5%
RoHS
Compliant
Wattage
3 or 5 watt
Non-Inductive
Winding
Optional (blank
= std. winding)
Tape & reel
1000 per reel
Modified
lead length
Resistance Value
R10 = 0.10Ω
1R0 = 1.0Ω
10R = 10.0Ω
250 = 250Ω
1K0 = 1,000Ω
7K5 = 7500
20K = 20000
Low Cost Silicone Coated Axial
(mm)
ORDERING INFORMATION
DIMENSIONS
Type L nom D max* d nom
53J 14±1.5 5.6 0.80±0.05
55J 21±1.5 8 1.0±0.05
Standard Part
Numbers
53JR10E
53JR50E
53J1R0E
53J5R0E
53J7R5E
53J10RE
53J25RE
53J50RE
53J75RE
53J100E
53J250E
53J500E
53J750E
53J1K0E
53J2K0E
53J5K0E
53J10KE
55JR10E
55JR50E
55J1R0E
55J5R0E
55J7R5E
55J10RE
55J25RE
55J50RE
55J75RE
55J100E
55J250E
55J500E
55J750E
55J1K0E
55J2K0E
55J5K0E
55J10KE
55J20KE
*D max. will be 6mm max. for 53J
and 8.5mm for 55J for values less
than or equal to 1R0.
**When ordered on tape and reel,
lead length will be 36mm ±3 for
53J and 34mm ± 3 for 55J.
7
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