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E-flite 40-Amp Lite Pro Switch-Mode BEC Brushless ESC
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For up to 40 amps of continuous current with proper airflow, the E-flite 40-Amp Lite Pro SB brushless ESC delivers. It drives up to 7 analog or 6 digital servos with the BEC on any recommended input voltage. This brushless ESC includes programmable motor braking, soft start for helis and planes, timing, throttle input range and low voltage cutoff. It also features auto motor shutdown in case of lost signal or interference. The safe power-arm mode prevents accidental starts. All the great features of E-flite's popular 40-Amp Pro SB Brushless ESC, in a lighter weight package perfect for use in large-size park flyers and mid-size models where space and weight are more critical.
Brake: Yes Continuous Maximum Current: 40A Input Voltage: 3S-6S LiPo or 9- to 18-cell Ni-MH/Ni-Cd Input Connector Types: 13AWG with E-flite EC3 connector Output Connector Types: 16AWG with 3.5mm Female Gold Bullet Connectors Momentary Peak Current: 55A Length: 2.6 in (66mm) Width: 1.2 in (31mm) Height: 0.47 in (12mm) Weight: 1.7 oz (48g) BEC Voltage: 2.5A continuous
Servo Ratings with BEC Enabled: Drives up to 7 analog or 6 digital standard-sized servos with the BEC on any recommended input voltage. This also includes up to 7 standard analog or 5 standard digital and 1 retract servo, perfect for 25-sized warbird conversions.
Some servo combinations we have tested in various models include:
• 4 JR SPORT MN48 (JSP20040) analog mini servos—E-flite Diamante 25e ARF and J-3 Cub 25e ARF
• 4 JR DS3421 (JRPSDS3421) digital mini servos—E-flite Eratix 3D 25e ARF
• 7 JR MC35 (JSP20030) analog micro servos and 1 JR RT88 (JSP20080) retract servo—25-sized warbird
• 4 JR MC35 (JSP20030) analog micro servos—15-sized sport aerobatic
• 6 JR SPORT MN48 (JSP20040) analog mini servos—E-flite Ultra Stick 25 ARF & 15-size sport plane
• 4 Spektrum DSP75 (SPMDSP75) digital programmable super sub micro servos-E-flite Ultimate 20-300 10e ARF
Some other brands and models of servos may have significantly higher current draw. Digital servos and binding servos of any kind typically have higher current draw. As a general rule, micro and sub-micro servos draw less current which may affect your servo usage as shown in the examples above. We recommend the use of a Hangar 9 Servo and Receiver Current Meter (HAN172), installed between the throttle lead of the ESC and receiver, to confirm current draw of the actual servos used. Also, always be sure to position the ESC for maximum airflow since cooling can significantly aid in the performance of the BEC.
Before first use, please refer to “Servo Ratings with BEC Enabled” notes for BEC usage guidelines. You must follow these guidelines for safe operation. If you are using more than 7 analog standard servos, more than 6 digital standard servos, or servos with higher current draw than the BEC can deliver, you will need to disable the BEC. If you wish to disable the BEC, you must remove the red receiver wire lead and connector from the receiver lead housing, and then insulate it properly to prevent shorting.
When operating with the BEC disabled, E-flite recommends the use of a separate, high-power, external BEC (like the Ultimate BEC), or receiver pack and switch using the following items to ensure trouble-free operation:
1. JR 1100mAh 4.8V Ni-MH receiver battery (JRPB4240), or similar
2. JR Switch Harness (JRPA003), or similar
Up to 40-amp continuous current with proper airflow, 55-amp burst current 5-volt Switch-Mode BEC circuit capable of 2.5-amp continuous current Drives up to 7 analog or 6 digital standard-sized servos with the BEC on any recommended input voltage 3S-6S LiPo or 9- to 18-cell Ni-MH/Ni-Cd input voltage Programmable motor braking Safe power-arm mode prevents accidental starts Programmable soft start for helis and airplanes Auto motor shutdown if signal is lost or there is interference Programmable timing – 5 user-selectable ranges for use with a larger variety of brushless motors Programmable throttle input range (1.1–1.9ms or 1.2–1.8ms) Heli mode for starting the motor with a low speed ratio Optional RS232 Serial Link available for programming (EFLARS232) Pre-wired connectors-E-flite EC3 connectors on battery input and 3.5mm female gold bullets on motor output leads
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