Switching Controllers – Mouser Hong Kong

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NCP1239 Switching Controllers

onsemi NCP1239 Switching Controllers are fixed-frequency current-mode controllers featuring a high-voltage start-up current source to provide a quick and lossless power-on sequence. This function greatly simplifies the design of the auxiliary supply and the V_CC capacitor. These NCP1239 controllers feature a timer-based fault detection circuitry that ensures a quasi-flat overload detection, independent of the input voltage. Typical applications include AC-DC converters for TVs, set-top boxes, and printers offline adapters for notebooks and netbooks.

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (HKD) Filter the results in the table by unit price based on your quantity.	Qty.	Topology	Number of Outputs	Switching Frequency	Duty Cycle - Max	Output Voltage	Output Current	Minimum Operating Temperature	Maximum Operating Temperature	Mounting Style	Package/Case	Packaging
Switching Controllers NCP1239D 65KHZ NCP1239DD65R2G onsemi 1: HK$7.64 2,433In Stock	Mfr. Part No. NCP1239DD65R2G Mouser Part No 863-NCP1239DD65R2G	onsemi	Switching Controllers NCP1239D 65KHZ Learn More about onsemi ncp1239 controllers	Datasheet	2,433In Stock	Cut Tape HK$7.64 HK$5.45 HK$4.92 HK$4.32 Reel HK$3.47 View HK$4.04 HK$3.87 HK$3.64 HK$3.38 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Flyback	1 Output	65 kHz	84 %	13.5 V	500 mA	- 40 C	+ 125 C	SMD/SMT	SOIC-7	Reel, Cut Tape, MouseReel
Switching Controllers NCP1239E 100KHZ NCP1239ED100R2G onsemi 1: HK$7.64 2,132In Stock	Mfr. Part No. NCP1239ED100R2G Mouser Part No 863-NCP1239ED100R2G	onsemi	Switching Controllers NCP1239E 100KHZ Learn More about onsemi ncp1239 controllers	Datasheet	2,132In Stock	Cut Tape HK$7.64 HK$5.45 HK$4.92 HK$4.32 View Reel HK$3.41 HK$4.04 HK$3.87 HK$3.64 HK$3.41 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Flyback	1 Output	100 kHz	84 %	13.5 V	500 mA	- 40 C	+ 125 C	SMD/SMT	SOIC-7	Reel, Cut Tape, MouseReel
Switching Controllers NCP1239E 65KHZ NCP1239ED65R2G onsemi 1: HK$7.64 2,500In Stock	Mfr. Part No. NCP1239ED65R2G Mouser Part No 863-NCP1239ED65R2G	onsemi	Switching Controllers NCP1239E 65KHZ Learn More about onsemi ncp1239 controllers	Datasheet	2,500In Stock	Cut Tape HK$7.64 HK$5.45 HK$4.92 HK$4.32 Reel HK$3.32 View HK$4.04 HK$3.87 HK$3.59 HK$3.31 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Flyback	1 Output	65 kHz	84 %	13.5 V	500 mA	- 40 C	+ 125 C	SMD/SMT	SOIC-7	Reel, Cut Tape, MouseReel
Switching Controllers NCP1239G 100KHZ NCP1239GD100R2G onsemi 1: HK$7.64 2,278In Stock NRND	Mfr. Part No. NCP1239GD100R2G Mouser Part No 863-NCP1239GD100R2G NRND	onsemi	Switching Controllers NCP1239G 100KHZ Learn More about onsemi ncp1239 controllers	Datasheet	2,278In Stock	Cut Tape HK$7.64 HK$5.45 HK$4.92 HK$4.32 View Reel HK$3.47 HK$4.04 HK$3.87 HK$3.54 HK$3.47 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Flyback	1 Output	100 kHz	84 %	13.5 V	500 mA	- 40 C	+ 125 C	SMD/SMT	SOIC-7	Reel, Cut Tape, MouseReel
Switching Controllers NCP1239J 65KHZ NCP1239JD65R2G onsemi 1: HK$7.56 2,820In Stock NRND	Mfr. Part No. NCP1239JD65R2G Mouser Part No 863-NCP1239JD65R2G NRND	onsemi	Switching Controllers NCP1239J 65KHZ Learn More about onsemi ncp1239 controllers	Datasheet	2,820In Stock	Cut Tape HK$7.56 HK$5.42 HK$4.88 HK$4.30 View Reel HK$3.30 HK$4.01 HK$3.85 HK$3.58 HK$3.30 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Flyback	1 Output	65 kHz	84 %	13.5 V	500 mA	- 40 C	+ 125 C	SMD/SMT	SOIC-7	Reel, Cut Tape, MouseReel
Switching Controllers NCP1239F 65KHZ NCP1239FD65R2G onsemi 1: HK$7.64 2,495In Stock	Mfr. Part No. NCP1239FD65R2G Mouser Part No 863-NCP1239FD65R2G	onsemi	Switching Controllers NCP1239F 65KHZ Learn More about onsemi ncp1239 controllers	Datasheet	2,495In Stock	Cut Tape HK$7.64 HK$5.45 HK$4.92 HK$4.32 View Reel HK$3.47 HK$4.04 HK$3.87 HK$3.64 HK$3.47 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Flyback	1 Output	65 kHz	84 %	13.5 V	500 mA	- 40 C	+ 125 C	SMD/SMT	SOIC-7	Reel, Cut Tape, MouseReel
Switching Controllers NCP1239L 100KHZ NCP1239LD100R2G onsemi 1: HK$7.64 2,500In Stock	Mfr. Part No. NCP1239LD100R2G Mouser Part No 863-NCP1239LD100R2G	onsemi	Switching Controllers NCP1239L 100KHZ Learn More about onsemi ncp1239 controllers	Datasheet	2,500In Stock	Cut Tape HK$7.64 HK$5.45 HK$4.92 HK$4.32 Reel HK$3.47 View HK$4.04 HK$3.87 HK$3.74 HK$3.38	Min.: 1 Mult.: 1 : 2,500	Flyback		100 kHz	84 %		500 mA		+ 150 C	SMD/SMT	SOIC-7	Reel, Cut Tape
Switching Controllers NCP1239C 65KHZ NCP1239CD65R2G onsemi 1: HK$7.64 2,106In Stock NRND	Mfr. Part No. NCP1239CD65R2G Mouser Part No 863-NCP1239CD65R2G NRND	onsemi	Switching Controllers NCP1239C 65KHZ Learn More about onsemi ncp1239 controllers	Datasheet	2,106In Stock	Cut Tape HK$7.64 HK$5.45 HK$4.92 HK$4.32 View Reel HK$3.44 HK$4.04 HK$3.87 HK$3.74 HK$3.44 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Flyback	1 Output	65 kHz	84 %	13.5 V	500 mA	- 40 C	+ 125 C	SMD/SMT	SOIC-7	Reel, Cut Tape, MouseReel
Switching Controllers NCP1239K, 65KHZ NCP1239KD65R2G onsemi 1: HK$6.66 2,505In Stock NRND	Mfr. Part No. NCP1239KD65R2G Mouser Part No 863-NCP1239KD65R2G NRND	onsemi	Switching Controllers NCP1239K, 65KHZ Learn More about onsemi ncp1239 controllers	Datasheet	2,505In Stock	Cut Tape HK$6.66 HK$5.02 HK$4.64 HK$4.20 View Reel HK$3.49 HK$3.99 HK$3.87 HK$3.77 HK$3.49 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Flyback	1 Output	65 kHz	84 %	13.5 V	500 mA	- 40 C	+ 125 C	SMD/SMT	SOIC-7	Reel, Cut Tape, MouseReel
Switching Controllers NCP1239A 65KHZ NCP1239AD65R2G onsemi 1: HK$7.81 158In Stock 12,500Expected 22/9/2026	Mfr. Part No. NCP1239AD65R2G Mouser Part No 863-NCP1239AD65R2G	onsemi	Switching Controllers NCP1239A 65KHZ Learn More about onsemi ncp1239 controllers	Datasheet	158In Stock 12,500Expected 22/9/2026	Cut Tape HK$7.81 HK$5.52 HK$4.97 HK$4.35 View Reel HK$3.36 HK$4.09 HK$3.91 HK$3.76 HK$3.36 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Flyback	1 Output	65 kHz	84 %	13.5 V	500 mA	- 40 C	+ 125 C	SMD/SMT	SOIC-7	Reel, Cut Tape, MouseReel
Switching Controllers NCP1239B 100KHZ NCP1239BD100R2G onsemi 1: HK$7.64 1,560In Stock	Mfr. Part No. NCP1239BD100R2G Mouser Part No 863-NCP1239BD100R2G	onsemi	Switching Controllers NCP1239B 100KHZ Learn More about onsemi ncp1239 controllers	Datasheet	1,560In Stock	Cut Tape HK$7.64 HK$5.45 HK$4.92 HK$4.32 View Reel HK$3.47 HK$4.04 HK$3.87 HK$3.74 HK$3.47 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Flyback	1 Output	100 kHz	84 %	13.5 V	500 mA	- 40 C	+ 125 C	SMD/SMT	SOIC-7	Reel, Cut Tape, MouseReel
Switching Controllers NCP1239B 65KHZ NCP1239BD65R2G onsemi 1: HK$8.06 2,701In Stock	Mfr. Part No. NCP1239BD65R2G Mouser Part No 863-NCP1239BD65R2G	onsemi	Switching Controllers NCP1239B 65KHZ Learn More about onsemi ncp1239 controllers	Datasheet	2,701In Stock	Cut Tape HK$8.06 HK$5.70 HK$5.13 HK$4.50 View Reel HK$3.61 HK$4.19 HK$4.01 HK$3.86 HK$3.61 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Flyback	1 Output	65 kHz	84 %	13.5 V	500 mA	- 40 C	+ 125 C	SMD/SMT	SOIC-7	Reel, Cut Tape, MouseReel
Switching Controllers NCP1239I 65KHZ NCP1239ID65R2G onsemi 1: HK$7.48 2,430In Stock	Mfr. Part No. NCP1239ID65R2G Mouser Part No 863-NCP1239ID65R2G	onsemi	Switching Controllers NCP1239I 65KHZ Learn More about onsemi ncp1239 controllers	Datasheet	2,430In Stock	Cut Tape HK$7.48 HK$5.38 HK$4.85 HK$4.26 View Reel HK$3.36 HK$3.98 HK$3.89 HK$3.76 HK$3.36 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Flyback	1 Output	65 kHz	84 %	13.5 V	500 mA	- 40 C	+ 125 C	SMD/SMT	SOIC-7	Reel, Cut Tape, MouseReel
Switching Controllers NCP1239H 65KHZ NCP1239HD65R2G onsemi 2,500: HK$3.69 12,500Factory Stock Available NRND	Mfr. Part No. NCP1239HD65R2G Mouser Part No 863-NCP1239HD65R2G NRND	onsemi	Switching Controllers NCP1239H 65KHZ Learn More about onsemi ncp1239 controllers	Datasheet	12,500Factory Stock Available More Info Available	Reel HK$3.69	Min.: 2,500 Mult.: 2,500 : 2,500	Flyback	1 Output	65 kHz	84 %	13.5 V	500 mA	- 40 C	+ 125 C	SMD/SMT	SOIC-7	Reel
Switching Controllers NCP1239A 100KHZ NCP1239AD100R2G onsemi 1: HK$8.06 Non-Stocked Lead-Time 53 Weeks End of Life	Mfr. Part No. NCP1239AD100R2G Mouser Part No 863-NCP1239AD100R2G End of Life	onsemi	Switching Controllers NCP1239A 100KHZ Learn More about onsemi ncp1239 controllers	Datasheet	Non-Stocked Lead-Time 53 Weeks	Cut Tape HK$8.06 HK$5.65 HK$5.06 HK$4.42 View Reel HK$3.35 HK$4.32 HK$3.59 HK$3.35 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Flyback	1 Output	100 kHz	84 %	13.5 V	500 mA	- 40 C	+ 125 C	SMD/SMT	SOIC-7	Reel, Cut Tape, MouseReel

NCP1239 Switching Controllers

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