Switching Controllers – Mouser Mexico

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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 (USD) 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 NCP1239E 100KHZ NCP1239ED100R2G onsemi 1: $1.29 2,165In Stock	Mfr. Part # NCP1239ED100R2G Mouser Part # 863-NCP1239ED100R2G	onsemi	Switching Controllers NCP1239E 100KHZ Learn More about onsemi ncp1239 controllers	Datasheet	2,165In Stock	Cut Tape $1.29 $0.924 $0.835 $0.735 View Reel $0.556 $0.688 $0.659 $0.62 $0.556 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: $1.29 2,490In Stock	Mfr. Part # NCP1239ED65R2G Mouser Part # 863-NCP1239ED65R2G	onsemi	Switching Controllers NCP1239E 65KHZ Learn More about onsemi ncp1239 controllers	Datasheet	2,490In Stock	Cut Tape $1.29 $0.924 $0.835 $0.735 Reel $0.572 View $0.688 $0.659 $0.62 $0.556 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: $1.29 1,613In Stock	Mfr. Part # NCP1239BD100R2G Mouser Part # 863-NCP1239BD100R2G	onsemi	Switching Controllers NCP1239B 100KHZ Learn More about onsemi ncp1239 controllers	Datasheet	1,613In Stock	Cut Tape $1.29 $0.924 $0.835 $0.735 Reel $0.572 View $0.688 $0.659 $0.625 $0.569 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 NCP1239D 65KHZ NCP1239DD65R2G onsemi 1: $1.17 2,435In Stock	Mfr. Part # NCP1239DD65R2G Mouser Part # 863-NCP1239DD65R2G	onsemi	Switching Controllers NCP1239D 65KHZ Learn More about onsemi ncp1239 controllers	Datasheet	2,435In Stock	Cut Tape $1.17 $0.924 $0.835 $0.735 Reel $0.572 View $0.688 $0.659 $0.62 $0.556 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 NCP1239J 65KHZ NCP1239JD65R2G onsemi 1: $1.27 2,817In Stock NRND	Mfr. Part # NCP1239JD65R2G Mouser Part # 863-NCP1239JD65R2G NRND	onsemi	Switching Controllers NCP1239J 65KHZ Learn More about onsemi ncp1239 controllers	Datasheet	2,817In Stock	Cut Tape $1.27 $0.919 $0.829 $0.731 View Reel $0.553 $0.683 $0.655 $0.616 $0.553 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 NCP1239C 65KHZ NCP1239CD65R2G onsemi 1: $1.29 2,148In Stock NRND	Mfr. Part # NCP1239CD65R2G Mouser Part # 863-NCP1239CD65R2G NRND	onsemi	Switching Controllers NCP1239C 65KHZ Learn More about onsemi ncp1239 controllers	Datasheet	2,148In Stock	Cut Tape $1.29 $0.924 $0.835 $0.735 View Reel $0.556 $0.688 $0.659 $0.62 $0.556 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: $1.29 2,162In Stock NRND	Mfr. Part # NCP1239GD100R2G Mouser Part # 863-NCP1239GD100R2G NRND	onsemi	Switching Controllers NCP1239G 100KHZ Learn More about onsemi ncp1239 controllers	Datasheet	2,162In Stock	Cut Tape $1.29 $0.924 $0.835 $0.735 Reel $0.572 View $0.688 $0.659 $0.62 $0.556 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 NCP1239F 65KHZ NCP1239FD65R2G onsemi 1: $1.29 2,295In Stock	Mfr. Part # NCP1239FD65R2G Mouser Part # 863-NCP1239FD65R2G	onsemi	Switching Controllers NCP1239F 65KHZ Learn More about onsemi ncp1239 controllers	Datasheet	2,295In Stock	Cut Tape $1.29 $0.924 $0.835 $0.735 Reel $0.58 View $0.688 $0.659 $0.62 $0.556 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: $1.29 2,500In Stock	Mfr. Part # NCP1239LD100R2G Mouser Part # 863-NCP1239LD100R2G	onsemi	Switching Controllers NCP1239L 100KHZ Learn More about onsemi ncp1239 controllers	Datasheet	2,500In Stock	Cut Tape $1.29 $0.93 $0.837 $0.736 Reel $0.61 View $0.688 $0.659 $0.638 $0.594	Min.: 1 Mult.: 1 : 2,500	Flyback		100 kHz	84 %		500 mA		+ 150 C	SMD/SMT	SOIC-7	Reel, Cut Tape
Switching Controllers NCP1239A 65KHZ NCP1239AD65R2G onsemi 1: $1.29 11,981In Stock	Mfr. Part # NCP1239AD65R2G Mouser Part # 863-NCP1239AD65R2G	onsemi	Switching Controllers NCP1239A 65KHZ Learn More about onsemi ncp1239 controllers	Datasheet	11,981In Stock	Cut Tape $1.29 $0.926 $0.833 $0.733 View Reel $0.553 $0.685 $0.657 $0.651 $0.553 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 65KHZ NCP1239BD65R2G onsemi 1: $1.30 312In Stock 7,500Expected 12/1/2026	Mfr. Part # NCP1239BD65R2G Mouser Part # 863-NCP1239BD65R2G	onsemi	Switching Controllers NCP1239B 65KHZ Learn More about onsemi ncp1239 controllers	Datasheet	312In Stock 7,500Expected 12/1/2026	Cut Tape $1.30 $0.931 $0.839 $0.737 View Reel $0.555 $0.689 $0.668 $0.555 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: $1.31 97In Stock NRND	Mfr. Part # NCP1239KD65R2G Mouser Part # 863-NCP1239KD65R2G NRND	onsemi	Switching Controllers NCP1239K, 65KHZ Learn More about onsemi ncp1239 controllers	Datasheet	97In Stock	Cut Tape $1.31 $0.939 $0.845 $0.744 View Reel $0.56 $0.696 $0.666 $0.66 $0.56 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: $1.29 2,430In Stock	Mfr. Part # NCP1239ID65R2G Mouser Part # 863-NCP1239ID65R2G	onsemi	Switching Controllers NCP1239I 65KHZ Learn More about onsemi ncp1239 controllers	Datasheet	2,430In Stock	Cut Tape $1.29 $0.918 $0.827 $0.727 View Reel $0.547 $0.679 $0.65 $0.646 $0.547 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: $0.581 12,500Factory Stock Available NRND	Mfr. Part # NCP1239HD65R2G Mouser Part # 863-NCP1239HD65R2G NRND	onsemi	Switching Controllers NCP1239H 65KHZ Learn More about onsemi ncp1239 controllers	Datasheet	12,500Factory Stock Available More Info Available	Reel $0.581	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

NCP1239 Switching Controllers

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NCP1239 Switching Controllers

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