AP851
50 Watts TO-220 High
Power Resistors
A high power TO-220 style resistor package designed for high frequency emitter
circuits in switching power supplies. Also used in voltage regulation and low energy
pulse loading.
•
50 Watts at 25˚C case temperature on heat sink
•
Single screw mounting to heat sink
•
Moulded case for proctection and easy to mount
•
Non-inductive design
•
Electrically isolated case
•
RoHS Compliant
Characteristics
Power rating:
Operating voltage:
Dielectric strength:
Insulation resistance:
Temperature coefficient:
Short time overload:
Load life:
Damp heat with load:
Solderability:
Thermal shock:
Terminal strength:
Vibration and high frequency:
2.25 Watts in free air
420V max
1800Vac
10GΩ min
As specified, referenced to 25˚C, ∆R taken at +105˚C
∆R ±0.3%, 2 times rated power with applied voltage not to exceed 1.5 times maximum continuous
operating voltage for 5 seconds
∆R ±1.0%, 2000 hours at rated power
∆R ±0.5%, 40 ±2˚C, 90 - 95% R.H max working voltage for 1000 hours with 1.5 hours “ON” and
0.5 hours “OFF”
90% min coverage, 245 ±5˚C for 3 seconds
∆R ±0.3%, -65˚C - 150˚C, 100 cycles
∆R ±0.2%, 2.4 N
∆R ±0.2%, 20g peak
Electrical Specifications
Resistance
Value Range
R1 - 1R
1R02 - 3R
3R01 - 10R
10R2 - 10K
Available Tolerance & Pref.
Available TCR
Value Ranges
J (±5%) K (±10%)
F (±1%) , J (±5%) ,
K (±10%)
D (±0.5%) F (±1%) J
(±5%) K (±10%)
Not specified
Derating Curve
100
Power Rated %
80
60
40
20
0
0
25
50
75
100
125
150
175
±300ppm/˚C
±100ppm/˚C
±200ppm/˚C
±50ppm/˚C
±100ppm/˚C
±200ppm/˚C
Preferred value ranges:
F (±1%) - E96 , J (±5%) - E24, K (±10%) - E12
Case Temperature (°C)
ARCOL UK Limited,
Threemilestone Ind. Estate,
Truro, Cornwall, TR4 9LG, UK.
T +44 (0) 1872 277431
F +44 (0) 1872 222002
E sales@arcolresistors.com
The information contained herein does not form part of a
contract and is subject to change without notice. ARCOL
operate a policy of continual product development, therefore,
specifications may change.
It is the responsibility of the customer to ensure that the
component selected from our range is suitable for the intended
application. If in doubt please ask ARCOL.
Page 1 of 2
2/13.18
www.arcolresistors.com
AP851
50 Watts TO-220 High
Power Resistors
Dimensions (mm)
0.115 0.135"
(2.92 3.44mm)
2.92 - 3.44
(16.00 16.52mm)
16.00 - 16.52
0.63 0.65"
0.40 0.42"
(10.15
10.67
10.15 -
10.67mm)
(2.92 3.44mm)
2.92 - 3.44
0.115 0.135"
0.121 0.129"
(3.08 3.28mm)
3.08 - 3.28
0.045 0.055"
(1.14 1.40mm)
1.14 - 1.40
0.19 0.21"
(4.82 5.34mm)
4.82 - 5.34
0.026 0.034"
(0.66 0.86mm)
0.66 - 0.86
0.016 0.024"
(0.40
-
0.60mm)
0.40 0.60
0.06 0.08"
0.10 0.16"
(2.54 4.06mm)
2.54 - 4.06
(1.52
2.04
1.52 -
2.04mm)
(11.43
- 13.97
11.43
13.97mm)
0.45 0.55"
ARCOL UK Limited,
Threemilestone Ind. Estate,
Truro, Cornwall, TR4 9LG, UK.
T +44 (0) 1872 277431
F +44 (0) 1872 222002
E sales@arcolresistors.com
The information contained herein does not form part of a
contract and is subject to change without notice. ARCOL
operate a policy of continual product development, therefore,
specifications may change.
It is the responsibility of the customer to ensure that the
component selected from our range is suitable for the intended
application. If in doubt please ask ARCOL.
Page 2 of 2
2/13.18
www.arcolresistors.com
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