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Description
STMICROELECTRONICS LD39130SJ41R Fixed LDO Voltage Regulator, 1.4V to 5.5V, 300mV Dropout, 4.1Vout, 300mAout, Flip-Chip-4This is a Fixed LDO Voltage Regulator, 1. 4V to 5. 5V, 300mV Dropout, 4. 1Vout, 300mAout, Flip Chip 4 product from STMICROELECTRONICS with the model number LD39130SJ41RProduct details Output Type Fixed Input Voltage Min 1. 4V Input Voltage Max 5. 5V Fixed Output Voltage Nom. 4. 1V Adjustable Output Voltage Min Adjustable Output Voltage Max Output Current 300mA Dropout Voltage Vdo 300mV LDO Regulator Case Style Flip Chip No. of Pins 4Pins Operating
This is a Fixed LDO Voltage Regulator, 1.4V to 5.5V, 300mV Dropout, 4.1Vout, 300mAout, Flip-Chip-4 product from STMICROELECTRONICS with the model number LD39130SJ41RProduct details
| Output Type | Fixed |
| Input Voltage Min | 1.4V |
| Input Voltage Max | 5.5V |
| Fixed Output Voltage Nom. | 4.1V |
| Adjustable Output Voltage Min | - |
| Adjustable Output Voltage Max | - |
| Output Current | 300mA |
| Dropout Voltage Vdo | 300mV |
| LDO Regulator Case Style | Flip-Chip |
| No. of Pins | 4Pins |
| Operating Temperature Min | -40°C |
| Operating Temperature Max | 125°C |
| Packaging | Cut Tape |
| Product Range | - |
| Automotive Qualification Standard | - |
| MSL | - |
Other details
| Brand | STMICROELECTRONICS |
| Part Number | LD39130SJ41R |
| Quantity | Each (Supplied on Cut Tape) |
| Technical Data Sheet EN | |
| Technical Data Sheet EN |
All product and company names are trademarks™ or registered® trademarks of their respective holders. Use of them does not imply any affiliation with or endorsement by them. Image is for illustrative purposes only. Please refer to product description.
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4.0 ★★★★★
Based on 839 reviews
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Product Reviews
★★★★★ 4
Good quality, bright, good light projection pattern, good choice for snowblowers
Color: 2Pcs 18W LED Flood Light, Color: 2Pcs 18W LED Flood Light
This review is ONLY for the Nilight model 1260LM (the package of TWO of them).
This product has a flexible design, allowing it to be used in a variety of ways when you want to add illumination to a vehicle of some kind. It can be used as add-on fog lamps for trucks and off-road vehicle, it can be used as headlights for golf carts and such, and it is a good choice for adding headlights to snowblowers. The two mounting brackets allow swiveling and angling up and down for best aim and illumination pattern.
Each 'lamp' assembly is mostly made of black anodized or black powder-coated aluminum, with a water-resistant design. The front 'lens' is Lexan or some other suitable clear plastic material with good, durable properties.
The manufacturer claims that the included mounting hardware (bolts, nuts, washers) are stainless steel, but they seem to weigh too little to be SOLID stainless. Whatever they are made from, they do not attract strong (neodymium) magnets. Because I bought the lamps to use on my snowblower, I decided to replace the included hardware with solid stainless hardware. The large bolts for mounting the brackets are M8 x 1.25 and the smaller bolts for attaching the lamps to the brackets are M6 x 1.0. I also chose to purchase the smaller bolts with 'cap head' bolts, because it make lamp angle adjustment much quicker and easier. Each included bolt comes with a flat washer and a split-ring lockwasher, and the large bolts also come with nuts (the smaller bolts thread directly into pre-tapped holes in the lamp bodies). The included lockwashers make sense for the main mounting bracket bolts, but there is no reasonable place to use the lockwashers of the smaller bolts. I inquired of Nilight tech support, and they clearly had never thought about WHERE those lockwashers should be used, and they concluded that they probably should NOT actually be used.
Each lamp has a short (perhaps 6") 'pigtail' cable coming out of one rear edge, and these cables each have a pair of wires inside; a RED one for + and a BLACK one for - . The user can wire these up any way that is desired, but probably they will be wired in parallel in most situations. I wish that the cables were longer; as it is, it is necessary to splice them to other cables in places that will not be hidden from view and/or otherwise protected from the elements.
These lamps are designed to operate on 12VDC power, although the exact voltage is not critical. There is no need to use a special LED power supply, since the lamps include their own internal power conditioning circuitry. Powering these from 12VDC, EACH lamp will required 1A of current, to 2A total when wired in parallel. This comes to 12V x 2A = 24 Watts.
In my case, I needed to power the lamps from a cordless power tool battery which produces a nominal 20VDC, which can drop as low as about 16V. Accordingly, I used one of the ubiquitous and inexpensive "DC Converters" (aka "DC-DC Converter") with an input having a voltage range that includes the expected 16~20V of the battery, and has a regulated 12V output, and has a Power (Watts) rating of at least twice the expected load, in this case a 60W one from Amazon. Since these converters have nearly a 100% efficiency, the input and output power (Watts) will be the same value, 24W. Doing the math in my case, an assuming an average battery voltage of 18V, the math is 24W / 18V = 1.3A. My battery has an Amp-Hour (Ah) of 4, so 4 / 1.3 = about 3 hours of operating time for the two lamps from a fully charged battery.
My only gripes with the product have already been mentioned:
- overly short power cords
- poorly conceived hardware 'package'; the smaller lockwasher are useless, and the associated bolts should have had cap heads instead of hex heads (I won't complain about the lack of sold stainless steel hardware, since that would have driven the selling price WAY up)
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Reviewed in the United States on January 9, 2026
★★★★★ 5
LOVE these LIGHTS !!!
Color: 2Pcs 18W LED Flood Light, Color: 2Pcs 18W LED Flood Light
i put 2 on the front of my 24" ariens snowthrower and it actually was to much !!! using one now and PLENTY of light !!! i have lots of dewalt batteries and i bought a adapter that allows me to put a battery in and has switch and fuse , wired to light and used one of my old 2AH batteries and it lasted 2.5 hours no problem , non stop . my newer batteries are 6 and 8 AH and last up to 8 hours before recharge . LOVE these LIGHTS !!! installing one on ladder rack on rear of truck . you know how many times that will be used on a late evening or early start so i can see to load or unload .
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Reviewed in the United States on January 6, 2026
★★★★★ 5
Good bang for the buck.
Color: 2Pcs 18W LED Flood Light
I have bought 10 of these now. I put them on my work trailer and use them for reverse lights.
They are cheap, easy to install, and they work very well. Now and then, I break one; they are exposed on my trailer and stuff happens, and these are so cheap it's not a big deal to replace them.
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Reviewed in the United States on April 15, 2026
★★★★★ 5
used for a snowblower light upgrade
Color: 2Pcs 18W LED Flood Light
I replaced the halogen bulb that came with my snowblower with these bad boys. Talk about a night and day difference! I was able to use two existing holes on the top of the blower and the included brackets to mount them. I also had to get a rectifier that converted the AC 24V to the 12V DC these expect. Used some scrap conduit, wire loom, and some project boxes to bring the whole thing together.
Now the light is a lot brighter, and it's not half-blocked by the chute. Big improvement!
You can find plenty of howtos and parts lists on youtube to do the same.
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Reviewed in the United States on May 27, 2026
★★★★★ 3
use care when starting the bolts.
Color: 2Pcs 18W LED Flood Light
Had these for awhile before I got around to installing them or should say attempted to install these. Mounting the bracket was challenging with supplied bolts. The predrilled holes in the mounting block were very poorly threaded. It was almost impossible to get the bolts started without cross threading. The finished product was acceptable. I have other Nilight products and never experienced a single issue.
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Reviewed in the United States on March 7, 2026
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