AP851 Datasheet, PDF (1/2 Pages) Ohmite Mfg. Co. – Single screw mounting to heat sink

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
Available Tolerance & Pref.
Value Ranges
Available TCR
J (±5%) K (±10%)
Not specified
1R02 - 3R
3R01 - 10R
F (±1%) , J (±5%) ,
K (±10%)
10R2 - 10K
D (±0.5%) F (±1%) J
(±5%) K (±10%)
±300ppm/˚C
±100ppm/˚C
±200ppm/˚C
±50ppm/˚C
±100ppm/˚C
±200ppm/˚C
Preferred value ranges:
F (±1%) - E96 , J (±5%) - E24, K (±10%) - E12
Derating Curve
100
80
60
40
20
0
0
25
50
75
100
125
150
175
Case Temperature (°C)
Page 1 of 2
For more information and ordering, please consult
www.arcolresistors.com
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