This is the ElectriFly Silver Series 45A Brushless Electronic Speed Control. Great for larger high performance airplanes. Delivering 45A of continuous current with a built-in Battery Circuit which can handle 2A, this ESC is simple to use and very affordable.
Features:
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Input Voltage: 6-12 cells NiCd/NiMH, 2-4 cells LiPo, (20V input w/o BEC)
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Output Current: 45A continuous maximum, 50A surge maximum
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Max Output Power: 500 watts
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ON-resistance: 8mΩ
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Operating frequency: 16kHz fixed
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Battery Eliminator Circuit BEC: 5V/2A
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Low Voltage Cutoff: Battery voltage x 0.67
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Thermal Cutoff: 110°C
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Timing Angle: 20°
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Brake: ON/OFF