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$169.70 (MRSP$231)  

The Platinum-120A-HV-PRO Opto ESC is part of Hobbywing’s "Platinum" series products line. It is the top product for aircraft and helicopter. 

Hobbywing has released new firmware for Platinum-120A-HV PRO (Hardware version = HW120_V2.0A, firmware verison = V1.08_101106_U) to make it compatible with Mikado V-Bar governor function.
>> See RPM sensor (Phase sensor)

1  Typical Applications

1.1 Super powerful for 600 class helicopter (Working with 8 or 10 cell LiPo battery)
1.2 Very powerful for 700 class helicopter (Working with 10 or 12 cell LiPo battery)
1.3 Super powerful for large scale aircraft such as F3A

2  Specification

2.1 Output: Continuous 120A, burst 180A up to 10 seconds.
2.2 Input Voltage: 5-12 cell lithium battery or 15-36 cell NIMH battery.   
2.3 BEC: None.
2.4 Control Signal Transmission: Optically coupled system.
2.5 Max Speed: 210,000rpm for 2 Pole BLM, 70,000rpm for 6 pole BLM, 35,000rpm for 12 pole BLM. (BLM: Brushless Motor)
2.6 Size: 88mm (L) * 55mm (W) * 15mm (H).
2.7 Weight: 125g. 

3  Features
3.1 High performance microprocessor brings out the best compatibility with all kinds of motors and the highest driving efficiency.
3.2 Wide-open heat-sink design creates the best heat dissipation effect.
3.3 With 3 types of start mode: Normal / Soft / Very-Soft, compatible with aircraft and helicopter. 
3.4 Smooth, linear, quick and precise throttle response.
3.5 Multiple protection features: Low-voltage cut-off protection / Over-heating protection / Throttle signal loss protection.
3.6 The throttle signal is transferred through optically coupled system to avoid the electromagnetic interference.
3.7 Perfect governor mode for helicopter.  
3.8 The firmware of the ESC can be updated through the USB adapter on the Professional LCD Program Box.
3.9 User programmable. Several kinds of program methods are supported: transmitter, digital LED program card, advanced professional LCD program box, PC software. Very easy to program at home or at the flying field.
4   Programmable Items