Product Overview
ON Semiconductor MRA4003T3G Standard Recovery Power Rectifier, Surface Mount, New in Factory Tape
Condition
New and unused, still in the original factory carrier tape. The photo shows a short cut strip of seven pieces sealed under clear cover tape in black embossed carrier with sprocket holes down one edge. Each device is a small black molded surface mount body with metal terminations at both ends and a light cathode band across one end. Faces are clean with no oxidation, solder, or handling marks, and each top is marked R13 over a second, finer line that is too small to read cleanly in this photo. The strip pictured is a representative view of the stock, not the quantity shipped.
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Product Overview
The MRA4003T3G is ON Semiconductor's surface mount standard recovery power rectifier, supplied here new in the factory tape it left the reel in. Standard recovery parts are the line-frequency workhorses of a power supply: they belong in 50/60 Hz rectifier and bridge positions, DC blocking, freewheeling, and general polarity protection, where a soft, ordinary reverse recovery is fine and a Schottky or ultrafast diode would be spending money on speed the circuit never uses. Buyers matching parts visually should note that these carry the short device code R13 on the body rather than the full MRA4003T3G part number, which is normal for a package this small and a common reason a board tech cannot find a diode by searching the marking. Voltage, current, and recovery ratings are not confirmed on our side and are not printed on the part, so pull the ON Semiconductor MRA4003T3G datasheet before you design or substitute with it.
Key Features
- Manufacturer: ON Semiconductor
- Manufacturer part number: MRA4003T3G
- Type: standard recovery power rectifier
- Mounting: surface mount, two-terminal molded body with a cathode band at one end
- Device marking: R13 on the top of each body, with a second smaller line below it
- Packaging: factory embossed carrier tape under sealed clear cover tape, cut from the reel
- Condition: new, unused, no oxidation or handling marks visible
- Ratings (reverse voltage, forward current, recovery time): not confirmed - verify against the ON Semiconductor MRA4003T3G datasheet before use
- Exact case outline: not confirmed - the photo shows a standard two-terminal SMD body; check the footprint against the datasheet before layout
Applications
- Repair technician replacing a shorted rectifier on the input side of a switching power supply and matching the original surface mount footprint instead of tacking in an axial diode
- Product engineer building a handful of prototype boards who needs real ON Semiconductor parts in tape rather than unknown marketplace pulls
- Small production shop short a few pieces at the end of a run and looking to finish the build this week
- Hobbyist assembling a compact DC supply or motor driver who wants a proven line-frequency rectifier that reflows cleanly
Frequently Asked Questions
The parts are marked R13, not MRA4003T3G. Are these the right diodes?
R13 is the top-side device code on the pieces in the photo, and short codes like this are how manufacturers mark packages too small to carry a full part number. We list and sell them as the ON Semiconductor MRA4003T3G. If your process requires the printed marking to match your BOM line character for character, check that against the ON Semiconductor marking table before you order.
What are the voltage and current ratings?
Not confirmed here. The ratings are not printed on the body, and we do not publish numbers we cannot read off the part or the packaging. Look up the MRA4003T3G on the ON Semiconductor datasheet and verify reverse voltage, average forward current, and surge rating against your design before you commit.
Can I use this in place of an axial leaded rectifier?
Only your circuit can answer that. This is a surface mount device, so it needs pads rather than through holes, and whether it covers the ratings your axial part was carrying depends on numbers we have not confirmed. Compare the datasheet to the part you are replacing first.
Do they still come in the factory tape?
Yes. Stock is cut from the reel and stays in the sealed embossed carrier tape shown in the photo, which keeps the terminations clean and makes hand placement or a pick-and-place feeder straightforward. Nothing has been loose in a bin.
Why buy a few of these here instead of a full reel or a bulk surplus lot?
Because a board repair needs three, not a reel. A factory reel is far more than a prototype or a service job will ever use, and a surplus lot forces you into a count you did not ask for and did not photograph. Here you take the exact number the board needs, out of stock we have looked at and pictured, still in factory tape. Shipping is $8 flat rate and free once your order passes $28, and orders leave our Idaho warehouse the same or next business day.
Marked R13, not MRA4003T3G, because a part this small has no room for its own name. Pull one off the tape, reflow it, and the rail it feeds goes back to being something you never think about.
