{"product_id":"hobbywing-ubec-25a-hv-external-bec","title":"Hobbywing UBEC 25A HV 5.2V\/6V\/7.4V\/8.4V External Switching BEC for 3-18S LiPo","description":"\u003cp\u003eThe \u003cstrong\u003eHobbywing UBEC 25A HV 5.2V\/6V\/7.4V\/8.4V External Switching BEC for 3-18S LiPo\u003c\/strong\u003e is a high-current external BEC designed for large RC aircraft, helicopters, and demanding receiver-power systems. It draws power from a \u003cstrong\u003e3S to 18S LiPo main battery\u003c\/strong\u003e and converts it into stable receiver-side voltage for servos, receivers, gyros, flight controllers, and other onboard electronics.\u003c\/p\u003e\n\n\u003cp\u003eWith \u003cstrong\u003e25A continuous current\u003c\/strong\u003e and up to \u003cstrong\u003e50A peak current\u003c\/strong\u003e, this HV UBEC is built for servo-heavy models where a small internal ESC BEC is not enough. The high-efficiency DC-DC regulator design offers more than 90% conversion efficiency, while the metal case helps with heat dissipation and reduces electromagnetic interference.\u003c\/p\u003e\n\n\u003cp\u003eThis UBEC also supports a \u003cstrong\u003e1S to 2S LiPo backup power supply\u003c\/strong\u003e. If the main power supply or UBEC power path fails, the connected electronics can continue receiving power from the backup battery, making it a strong option for large fixed-wing aircraft, helicopters, and high-value RC builds where receiver-power reliability matters.\u003c\/p\u003e\n\n\u003cp\u003e\n  \u003cimg style=\"max-width: 100%; height: auto; display: block; margin: 24px auto;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0633\/0617\/0582\/files\/01_240677a0-d4b0-489a-b183-bb00d02adb86.png\" alt=\"Hobbywing UBEC 25A HV metal case external BEC with powerful 25A 50A core component\"\u003e\n\u003c\/p\u003e\n\n\u003ch2 style=\"font-size: 18px; font-weight: bold; margin: 24px 0 10px; color: #000; border-bottom: 1px solid #eee; padding-bottom: 6px;\"\u003eProduct Specifications\u003c\/h2\u003e\n\n\u003ctable style=\"width: 100%; display: block; overflow-x: auto; border-collapse: separate !important; border-spacing: 0 8px !important; font-size: 14px; line-height: 1.3;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40%; background: #E60073; color: #fff; font-weight: bold; padding: 12px; border-radius: 6px 0 0 6px;\"\u003eProduct Name\u003c\/td\u003e\n\u003ctd style=\"background: #f7f7f7; padding: 12px; border-radius: 0 6px 6px 0;\"\u003eHobbywing UBEC 25A HV External Switching BEC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40%; background: #E60073; color: #fff; font-weight: bold; padding: 12px; border-radius: 6px 0 0 6px;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"background: #f7f7f7; padding: 12px; border-radius: 0 6px 6px 0;\"\u003eUBEC-25A-HV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40%; background: #E60073; color: #fff; font-weight: bold; padding: 12px; border-radius: 6px 0 0 6px;\"\u003ePart Number\u003c\/td\u003e\n\u003ctd style=\"background: #f7f7f7; padding: 12px; border-radius: 0 6px 6px 0;\"\u003e30606000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40%; background: #E60073; color: #fff; font-weight: bold; padding: 12px; border-radius: 6px 0 0 6px;\"\u003eBEC Type\u003c\/td\u003e\n\u003ctd style=\"background: #f7f7f7; padding: 12px; border-radius: 0 6px 6px 0;\"\u003eExternal switch-mode HV UBEC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40%; background: #E60073; color: #fff; font-weight: bold; padding: 12px; border-radius: 6px 0 0 6px;\"\u003eMain Input Voltage\u003c\/td\u003e\n\u003ctd style=\"background: #f7f7f7; padding: 12px; border-radius: 0 6px 6px 0;\"\u003e3S-18S LiPo \/ 9V-80V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40%; background: #E60073; color: #fff; font-weight: bold; padding: 12px; border-radius: 6px 0 0 6px;\"\u003eBackup Input Voltage\u003c\/td\u003e\n\u003ctd style=\"background: #f7f7f7; padding: 12px; border-radius: 0 6px 6px 0;\"\u003e1S-2S LiPo \/ 3V-9V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40%; background: #E60073; color: #fff; font-weight: bold; padding: 12px; border-radius: 6px 0 0 6px;\"\u003eOutput Voltage\u003c\/td\u003e\n\u003ctd style=\"background: #f7f7f7; padding: 12px; border-radius: 0 6px 6px 0;\"\u003e5.2V \/ 6.0V \/ 7.4V \/ 8.4V, adjustable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40%; background: #E60073; color: #fff; font-weight: bold; padding: 12px; border-radius: 6px 0 0 6px;\"\u003eOutput Current\u003c\/td\u003e\n\u003ctd style=\"background: #f7f7f7; padding: 12px; border-radius: 0 6px 6px 0;\"\u003eContinuous 25A, peak 50A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40%; background: #E60073; color: #fff; font-weight: bold; padding: 12px; border-radius: 6px 0 0 6px;\"\u003eOutput Channels\u003c\/td\u003e\n\u003ctd style=\"background: #f7f7f7; padding: 12px; border-radius: 0 6px 6px 0;\"\u003eUp to 8-channel parallel outputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40%; background: #E60073; color: #fff; font-weight: bold; padding: 12px; border-radius: 6px 0 0 6px;\"\u003eEfficiency\u003c\/td\u003e\n\u003ctd style=\"background: #f7f7f7; padding: 12px; border-radius: 0 6px 6px 0;\"\u003eMore than 90%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40%; background: #E60073; color: #fff; font-weight: bold; padding: 12px; border-radius: 6px 0 0 6px;\"\u003eMain Input Wires\u003c\/td\u003e\n\u003ctd style=\"background: #f7f7f7; padding: 12px; border-radius: 0 6px 6px 0;\"\u003eRed 16AWG 270mm × 1 \/ Black 16AWG 270mm × 1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40%; background: #E60073; color: #fff; font-weight: bold; padding: 12px; border-radius: 6px 0 0 6px;\"\u003eOutput Interface\u003c\/td\u003e\n\u003ctd style=\"background: #f7f7f7; padding: 12px; border-radius: 0 6px 6px 0;\"\u003e3P vertical pin header; four 3P-JR male connector wires included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40%; background: #E60073; color: #fff; font-weight: bold; padding: 12px; border-radius: 6px 0 0 6px;\"\u003eInput Connectors\u003c\/td\u003e\n\u003ctd style=\"background: #f7f7f7; padding: 12px; border-radius: 0 6px 6px 0;\"\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40%; background: #E60073; color: #fff; font-weight: bold; padding: 12px; border-radius: 6px 0 0 6px;\"\u003eOutput Connectors\u003c\/td\u003e\n\u003ctd style=\"background: #f7f7f7; padding: 12px; border-radius: 0 6px 6px 0;\"\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40%; background: #E60073; color: #fff; font-weight: bold; padding: 12px; border-radius: 6px 0 0 6px;\"\u003eSize\u003c\/td\u003e\n\u003ctd style=\"background: #f7f7f7; padding: 12px; border-radius: 0 6px 6px 0;\"\u003e55 × 40.2 × 17.6mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40%; background: #E60073; color: #fff; font-weight: bold; padding: 12px; border-radius: 6px 0 0 6px;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"background: #f7f7f7; padding: 12px; border-radius: 0 6px 6px 0;\"\u003e74g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2 style=\"font-size: 18px; font-weight: bold; margin: 24px 0 10px; color: #000; border-bottom: 1px solid #eee; padding-bottom: 6px;\"\u003eElegant Look \u0026amp; Powerful Core Component\u003c\/h2\u003e\n\n\u003cp\u003eThe Hobbywing UBEC 25A HV uses an elegant metal case that helps dissipate heat and reduce electromagnetic interference. Inside, the high-efficiency DC-DC voltage-regulating chip works with a specially designed circuit to deliver more than 90% conversion efficiency.\u003c\/p\u003e\n\n\u003cp\u003eIts \u003cstrong\u003e25A continuous current\u003c\/strong\u003e and \u003cstrong\u003e50A peak current\u003c\/strong\u003e meet the needs of demanding receiver-power systems, especially large helicopters, large fixed-wing aircraft, and models using multiple servos or high-current HV servo setups.\u003c\/p\u003e\n\n\n\n\u003ch2 style=\"font-size: 18px; font-weight: bold; margin: 24px 0 10px; color: #000; border-bottom: 1px solid #eee; padding-bottom: 6px;\"\u003eVarious Functions \u0026amp; Different Applications\u003c\/h2\u003e\n\n\u003cp\u003eAn external switch allows users to turn the UBEC output on or off easily. The wide voltage input range allows the main power supply from \u003cstrong\u003e3S to 18S LiPo\u003c\/strong\u003e to be connected to the UBEC, making it suitable for high-voltage RC aircraft power systems.\u003c\/p\u003e\n\n\u003cp\u003e\n  \u003cimg style=\"max-width: 100%; height: auto; display: block; margin: 24px auto;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0633\/0617\/0582\/files\/02_99542407-8b5c-48dd-9409-41befdf7c452.png\" alt=\"Hobbywing UBEC 25A HV external switch 3S to 18S LiPo input and adjustable output voltage for RC applications\"\u003e\n\u003c\/p\u003e\n\n\u003cp\u003eThe output voltage is adjustable between \u003cstrong\u003e5.2V, 6.0V, 7.4V, and 8.4V\u003c\/strong\u003e, covering different receiver and servo voltage requirements. Up to \u003cstrong\u003e8 channels of parallel outputs\u003c\/strong\u003e can help distribute current to multiple connected devices, while the internal LED indicators show the working status of the UBEC and the backup power connection status.\u003c\/p\u003e\n\n\n\n\u003ch2 style=\"font-size: 18px; font-weight: bold; margin: 24px 0 10px; color: #000; border-bottom: 1px solid #eee; padding-bottom: 6px;\"\u003eMultiple Protections\u003c\/h2\u003e\n\n\u003cp\u003eThis UBEC is designed with several protection functions for large RC models. BEC shoot-through protection helps prevent the main input voltage from directly flowing to the UBEC output if the UBEC is accidentally damaged, helping protect connected electronic devices.\u003c\/p\u003e\n\n\u003cp\u003e\n  \u003cimg style=\"max-width: 100%; height: auto; display: block; margin: 24px auto;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0633\/0617\/0582\/files\/004_d3f1de69-be0a-4fa8-a6f4-829cf582e3ab.png\" alt=\"Hobbywing UBEC 25A HV multiple protections including overcurrent short circuit overheat and low voltage cutoff\"\u003e\n\u003c\/p\u003e\n\n\u003cp\u003eIt also includes \u003cstrong\u003eover-current protection\u003c\/strong\u003e, \u003cstrong\u003eoutput short-circuit protection\u003c\/strong\u003e, \u003cstrong\u003eoverheat protection\u003c\/strong\u003e, and \u003cstrong\u003elow-voltage cutoff protection\u003c\/strong\u003e. When the main power supply voltage drops below 9V, the UBEC activates low-voltage cutoff and can switch to the backup power supply if a backup battery is connected.\u003c\/p\u003e\n\n\n\n\u003ch2 style=\"font-size: 18px; font-weight: bold; margin: 24px 0 10px; color: #000; border-bottom: 1px solid #eee; padding-bottom: 6px;\"\u003eBackup Power Supply\u003c\/h2\u003e\n\n\u003cp\u003eThe backup power supply function allows electronic devices connected to the UBEC to receive power directly from a backup battery when the main power supply is damaged or the UBEC fails due to internal faults. This helps maintain receiver-side operation in critical situations.\u003c\/p\u003e\n\n\u003cp\u003e\n  \u003cimg style=\"max-width: 100%; height: auto; display: block; margin: 24px auto;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0633\/0617\/0582\/files\/006_c2d37ce4-1837-4a5f-b6bf-c38bc14c223f.png\" alt=\"Hobbywing UBEC 25A HV backup power supply function for large RC aircraft receiver power\"\u003e\n\u003c\/p\u003e\n\n\u003cp\u003eThe backup input supports \u003cstrong\u003e1S to 2S LiPo\u003c\/strong\u003e. When using a backup battery, make sure the UBEC output voltage is not set much lower than the backup battery voltage. For example, do not set the UBEC output to 5.2V while using a 2S LiPo backup battery with voltage higher than the connected electronics can safely handle.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size: 18px; font-weight: bold; margin: 24px 0 10px; color: #000; border-bottom: 1px solid #eee; padding-bottom: 6px;\"\u003eOutput Voltage Guide\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e5.2V output:\u003c\/strong\u003e Suitable for many standard receiver and servo systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e6.0V output:\u003c\/strong\u003e Suitable for receivers and servos that support 6V operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e7.4V output:\u003c\/strong\u003e Suitable for compatible HV receivers and HV servos.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e8.4V output:\u003c\/strong\u003e Suitable only for compatible HV servo systems rated for 8.4V operation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThe output voltage can be changed with the built-in DIP switch. Always check the voltage rating of your receiver, gyro, flight controller, and servos before changing the UBEC output voltage.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size: 18px; font-weight: bold; margin: 24px 0 10px; color: #000; border-bottom: 1px solid #eee; padding-bottom: 6px;\"\u003eInstallation Notes\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003eConnect the UBEC main input wires in parallel with the main battery power supply.\u003c\/li\u003e\n\u003cli\u003eConnect a 1S to 2S LiPo backup battery if backup power operation is required.\u003c\/li\u003e\n\u003cli\u003ePlug the UBEC output into the receiver, flight controller, gyro, or servo power system as required by your model setup.\u003c\/li\u003e\n\u003cli\u003eIf your brushless ESC has no built-in BEC, no ESC-side BEC change is required.\u003c\/li\u003e\n\u003cli\u003eIf your brushless ESC already has a built-in BEC, disconnect the ESC’s BEC output before using this external UBEC.\u003c\/li\u003e\n\u003cli\u003eKeep the UBEC more than 5cm away from the receiver to reduce possible electromagnetic interference.\u003c\/li\u003e\n\u003cli\u003eThe external switch turns the UBEC output on or off, but it does not fully disconnect the backup power supply. To completely stop backup output, disconnect the backup battery.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2 style=\"font-size: 18px; font-weight: bold; margin: 24px 0 10px; color: #000; border-bottom: 1px solid #eee; padding-bottom: 6px;\"\u003eUser Manual\u003c\/h2\u003e\n\n\u003cp\u003eFor wiring diagrams, DIP-switch voltage settings, backup power notes, LED indicator details, and safety instructions, please refer to the official \u003ca style=\"color: #E60073; text-decoration: underline;\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0633\/0617\/0582\/files\/Hobbywing_UBEC_25A_User_manual.pdf\" target=\"_blank\"\u003eHobbywing UBEC 25A HV user manual\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size: 18px; font-weight: bold; margin: 24px 0 10px; color: #000; border-bottom: 1px solid #eee; padding-bottom: 6px;\"\u003eRecommended Applications\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003eLarge RC helicopters using multiple servos\u003c\/li\u003e\n\u003cli\u003eLarge fixed-wing aircraft with high receiver-side power demand\u003c\/li\u003e\n\u003cli\u003e3S to 18S LiPo high-voltage aircraft power systems\u003c\/li\u003e\n\u003cli\u003eOPTO ESC systems that require a separate BEC\u003c\/li\u003e\n\u003cli\u003eHV servo setups using 7.4V or 8.4V receiver power\u003c\/li\u003e\n\u003cli\u003eCustom RC aircraft builds where backup receiver power is required\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor more ESC and power-system options, explore our \u003ca style=\"color: #E60073; text-decoration: underline;\" href=\"https:\/\/chinahobbyline.com\/collections\/hobbywing-escs\"\u003eHobbywing ESCs\u003c\/a\u003e, \u003ca style=\"color: #E60073; text-decoration: underline;\" href=\"https:\/\/chinahobbyline.com\/collections\/esc-programmers-accessories\"\u003eESC Programmers \u0026amp; Accessories\u003c\/a\u003e, and \u003ca style=\"color: #E60073; text-decoration: underline;\" href=\"https:\/\/chinahobbyline.com\/collections\/external-bec-ubec\"\u003eExternal BEC \u0026amp; UBEC\u003c\/a\u003e collections.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size: 18px; font-weight: bold; margin: 24px 0 10px; color: #000; border-bottom: 1px solid #eee; padding-bottom: 6px;\"\u003eFAQ\u003c\/h2\u003e\n\n\u003ch3 style=\"font-size: 16px; font-weight: bold; margin: 18px 0 8px; color: #000;\"\u003eWhat is the Hobbywing UBEC 25A HV used for?\u003c\/h3\u003e\n\u003cp\u003eIt is used to provide stable power to receivers, servos, gyros, flight controllers, and other onboard electronics. It is especially useful for large helicopters, large fixed-wing aircraft, OPTO ESC setups, and servo-heavy models that need more receiver-side current than a small internal ESC BEC can provide.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size: 16px; font-weight: bold; margin: 18px 0 8px; color: #000;\"\u003eCan this UBEC be used with an 18S LiPo battery?\u003c\/h3\u003e\n\u003cp\u003eYes. The main input supports 3S to 18S LiPo, or 9V to 80V, making it suitable for high-voltage RC aircraft power systems.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size: 16px; font-weight: bold; margin: 18px 0 8px; color: #000;\"\u003eWhat is the backup power supply used for?\u003c\/h3\u003e\n\u003cp\u003eThe backup power supply allows connected electronics to receive power from a 1S to 2S LiPo backup battery if the main power supply is damaged, the main voltage drops too low, or the UBEC fails internally. It is designed to help maintain receiver-side operation in critical situations.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size: 16px; font-weight: bold; margin: 18px 0 8px; color: #000;\"\u003eShould I choose 5.2V, 6.0V, 7.4V, or 8.4V output?\u003c\/h3\u003e\n\u003cp\u003eChoose 5.2V for standard receiver and servo setups, 6.0V for electronics that support 6V operation, and 7.4V or 8.4V only for compatible HV receivers and HV servos. Always check the voltage rating of every connected device before changing the output voltage.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size: 16px; font-weight: bold; margin: 18px 0 8px; color: #000;\"\u003eDo I need to disable the ESC’s built-in BEC?\u003c\/h3\u003e\n\u003cp\u003eYes, if your ESC already has a built-in BEC and you want this external UBEC to power the receiver, the ESC’s BEC output should be disconnected first. This avoids powering the receiver from two BEC outputs at the same time.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size: 16px; font-weight: bold; margin: 18px 0 8px; color: #000;\"\u003eIs this product an ESC?\u003c\/h3\u003e\n\u003cp\u003eNo. This product is not an ESC and does not control the motor. It is an external HV switching BEC used to power receivers, servos, gyros, flight controllers, and other low-voltage electronics.\u003c\/p\u003e","brand":"ChinaHobbyLine","offers":[{"title":"Global","offer_id":48553109487830,"sku":"UBEC-25A-HV GL","price":73.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0633\/0617\/0582\/files\/UBEC25A_2048x_ab297900-a434-4250-a116-34e5f5144432.webp?v=1783419879","url":"https:\/\/chinahobbyline.com\/ja\/products\/hobbywing-ubec-25a-hv-external-bec","provider":"ChinaHobbyLine","version":"1.0","type":"link"}