Datasheet

Page 1 of 2
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.
ARCOL UK Limited,
Threemilestone Ind. Estate,
Truro, Cornwall, TR4 9LG, UK.
T [phone]
F [phone]
E sales
@
arcolresistors.com
www.arcolresistors.com
2/13.18
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
Electrical Specifications
Resistance
Value Range
Available Tolerance & Pref.
Value Ranges
Available TCR
R1 - 1R J (±5%) K (±10%) Not specified
1R02 - 3R
F (±1%) , J (±5%) ,
K (±10%)
±300ppm/˚C
3R01 - 10R
±100ppm/˚C
±200ppm/˚C
10R2 - 10K
D (±0.5%) F (±1%) J
(±5%) K (±10%)
±50ppm/˚C
±100ppm/˚C
±200ppm/˚C
Preferred value ranges:
F (±1%) - E96 , J (±5%) - E24, K (±10%) - E12
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
Derating Curve
100
80
60
40
20
0
0 25 50 75 100 125 150 175
Power Rated %
Case Temperature (°C)