Product Overview
IR1F 40V 1A Schottky Diode, Surface-Mount, Still Sealed in Its Carrier Tape
Condition
Unused, New Old Stock; clean and in excellent condition. The pieces are still riding in their original black embossed carrier tape with the clear cover tape sealed down over the pockets, and they get cut from that strip when your order is picked. In the close-up photo the topside marking reads IR1F over 0214, legible right through the cover film. The molded bodies are gray with bright silver end terminations, no solder, no flux haze, no tweezer scuffs, and no oxidation on the metal. The second photo lays a length of the strip above the PartsMine millimeter rule for a rough sense of scale; the tape sits proud of the rule rather than flat on it, so treat that as a reference only and go by the package dimensions in the specs below.
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Product Overview
The IR1F is a 40 V, 1 A Schottky diode in a small surface-mount body, built for fast switching and a low forward voltage drop of about 0.49 V at 1 A and 125°C. Schottky construction means there is no reverse recovery charge to burn off, so it settles quickly at high switching frequencies where a standard silicon rectifier would start costing you efficiency. The package runs roughly 4 mm by 3 mm, which puts a full 1 A rectifier into board space that a through-hole part would never fit, and the 430 A surge rating (5 µs sine wave) gives it headroom against inrush. These carry the topside marking IR1F over 0214 and no manufacturer logo, so identify by that marking rather than by brand when you cross-reference against your BOM.
Key Features
- Reverse Voltage (VRRM): 40 V
- Forward Current (IF(AV)): 1 A
- Forward Voltage Drop (VF): approximately 0.49 V at 1 A, 125°C
- Surge Current (IFSM): 430 A (5 µs sine wave)
- Package: SMD, approximately 4 mm x 3 mm
- Operating Temperature Range: -55°C to +150°C
- Topside marking observed in photos: IR1F over 0214, no brand logo
- Supplied from original black embossed carrier tape with the clear cover tape sealed
Applications
- Power supply technician rebuilding a low-voltage switcher and replacing an output rectifier that has been running hot
- Hardware developer laying out a tight prototype board who needs 1 A of rectification without a through-hole footprint
- Repair shop adding reverse-polarity protection to a DC input on a board that keeps coming back cooked
- Bench builder working a high-frequency switching circuit where reverse recovery in a standard silicon diode is costing efficiency
Frequently Asked Questions
What does the 0214 under the part number mean?
That is the second line of the topside marking, visible in the first photo. It is most likely a lot or date code, but we cannot confirm what the manufacturer intended by it, so treat IR1F as the identifying number and 0214 as a marking you can match if your build requires consistent coding across pieces.
Who made these? There is no logo on the part.
None of the pieces carry a manufacturer logo, only the IR1F 0214 topside marking. If your process requires a traceable manufacturer, this is not the part for it. If you are matching the number and the electrical envelope, what you see marked on the body is what you get.
Do they arrive on the tape or loose?
They are cut from the sealed strip you see in the photos and packed for shipment, so the parts stay protected and the cover tape stays over the pockets until you peel it. Nothing has been picked out of a bin and rattled around loose.
Can I use this as a drop-in for another 40 V 1 A surface-mount Schottky?
Electrically it sits in the common 40 V, 1 A Schottky envelope, and the search cross-reference to a 10BQ040 reflects that. Footprints and thermal pads still vary between manufacturers, so measure the pads in the second photo against your land pattern and verify the forward drop against your own design margin before you commit a run.
Why buy a few of these instead of a reel of three thousand?
Because a supply repair needs a few, not three thousand. You pick the exact count your board calls for rather than paying for a full reel, a minimum order, or a forced lot of 50 that spends the next decade in a parts drawer. Shipping is a flat $8, and it goes free once your order passes $28, so a few small parts ride along with the rest of your build at no extra cost. Orders leave our Idaho warehouse the same or next business day.
A 40 V Schottky is the part a switching supply leans on a hundred thousand times a second and nobody thinks about until the drop goes wrong. Cut what you need off the strip, put them on the board, and let them go back to being invisible.
