0805 / 0807 Micro Pre-wire Flashing 1.5Hz SMD LEDs 9-18v

0805 / 0807 micro pre-wired flashing SMD LEDs deliver a built-in 1.5Hz flash cycle in a compact surface-mount package that strikes the best balance…

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0805 / 0807 micro pre-wired flashing SMD LEDs deliver a built-in 1.5Hz flash cycle in a compact surface-mount package that strikes the best balance between small size and ease of handling. The 0805 body measures 2.0mm x 1.25mm, while the 0807 is 2.0mm x 1.8mm, both small enough to fit inside most HO and O scale signal housings yet large enough to position with standard hobby tweezers and no magnification. The 1.5Hz controller IC inside each LED produces a steady on-off blink approximately 1.5 times per second, matching the cadence of real-world railroad crossing signals, marine warning beacons, and aviation obstruction lights. Each LED comes pre-wired with ultra-thin enameled magnet wire and includes a built-in current-limiting resistor for direct connection to any 9-18V DC power source. Every order ships as a pack of 5.

The micro size designation places the 0805 / 0807 between the nearly invisible nano (0603) package and the more substantial 1206 package. This middle ground makes the 0805 the single most popular pre-wired SMD package for model railroad layout lighting. In HO scale (1:87), an 0805 LED scales to approximately 175mm x 110mm, proportionate to a signal head lens, a platform warning light, or a building-mounted exit lamp. In O scale (1:48), the same LED scales to approximately 96mm x 60mm, small enough to be hidden behind a signal lens without any visible overhang. Even in the larger G scale (1:22.5), the 0805 remains small enough for many indicator light applications. The 0807 variant offers a slightly wider light-emitting area that produces marginally more visible output at wider angles, making it the better choice when the LED needs to be seen from the side as well as head-on.

The 1.5Hz flashing capability opens up a wide range of animated model applications that would otherwise require dedicated electronic flasher circuits. Railroad crossing signals are the most common use: mount red flashing 0805 LEDs in each of the two signal heads on a crossbuck mast, connect them to your 12V lighting bus, and the signals begin flashing immediately. Because the flash controllers on individual LEDs are independent, the two signals will drift in and out of phase naturally, which many modelers find sufficiently realistic for layout operation without the complexity of a dedicated alternating flasher board. Block signals, approach signals, and switch indicators can all use flashing LEDs to indicate active status. Beyond railroads, model airfield dioramas use red and white flashing LEDs for runway threshold lights and taxiway edge markers, while harbor and marina models use green and red flashers for channel markers and buoy lights.

Scale model vehicles benefit significantly from 0805 flashing LEDs. Police cars, ambulances, fire trucks, tow trucks, and construction equipment can all be fitted with appropriately colored flashing LEDs to simulate emergency and warning lights. The 0805 package fits inside or beneath the light bar housing on most 1:87 and 1:64 scale emergency vehicles, and the magnet wire is thin enough to route through the vehicle interior and out the undercarriage to a connection point beneath the layout surface. For static display dioramas and shadow box scenes, a single flashing LED can transform an otherwise motionless emergency vehicle into the visual focal point of the entire scene. Military modelers use amber and red flashing LEDs on airfield vehicles, radar installations, and control tower models to add operational realism.

The magnet wire on these pre-wired LEDs is enameled copper, identical to the wire used across all pre-wired SMD packages. The enamel insulation prevents short circuits when wires run close together or contact metal surfaces inside your model. To make a solder connection, strip the enamel from the last 5-10mm of each wire by sanding with fine-grit sandpaper, scraping with a hobby knife, or dipping the wire tip into a pool of molten solder on your iron. Once the bright copper is exposed, the wire tins easily and forms reliable joints to bus wires, terminal blocks, or PCB pads. Route the wire through pre-drilled holes in layout surfaces, along structural members, or through hollow signal masts, keeping it hidden from view. At the connection point, join the wire to your 12V DC bus or to individual feed wires using solder or crimp connectors.

Multiple flashing LEDs can be wired in parallel to a common power bus without additional components. Each LED draws approximately 20mA when lit, so a standard 12V 1A power supply supports up to 50 flashing LEDs in parallel. The flash timing of each LED is governed by its own internal IC, so LEDs on the same bus will not synchronize. This independent timing actually benefits most applications: a row of channel markers along a model harbor shoreline will flash at slightly different moments, mimicking the real-world behavior of independently powered navigation aids. For layouts powered by DCC, use a bridge rectifier between the track bus and your lighting bus to convert the DCC waveform to DC. DCC track voltage (12-16V) falls comfortably within the 9-18V operating range. See the voltage guide for wiring diagrams.

When choosing between the 0805 / 0807 micro flashing LEDs and the smaller 0603 / 0606 nano flashing versions, consider the scale of your model and the viewing distance. The nano packages are superior for N scale and Z scale work where every fraction of a millimeter affects realism. The 0805 / 0807 micro packages are easier to handle, more forgiving during installation, and produce slightly more light output, making them the better choice for HO scale, O scale, and any application where ease of installation matters more than absolute minimum size. Both packages share the same 9-18V input range, the same magnet wire type, and the same 1.5Hz flash rate, so they are electrically interchangeable. Browse the full pre-wired SMD LED collection for steady-on versions of the same packages, or visit the animated pre-wired LED category for flickering, candle-effect, and color-cycling options.

Frequently Asked Questions

Both are micro-sized SMD packages with the same 2.0mm width. The 0805 measures 2.0mm x 1.25mm, while the 0807 is 2.0mm x 1.8mm, giving it a slightly larger light-emitting area. The 0807 produces marginally more visible output at wider viewing angles. For most model lighting applications, either package works interchangeably. Choose based on the available space in your signal head or fixture housing.
No. Each LED includes a built-in current-limiting resistor and a built-in 1.5Hz flash controller. Connect positive and negative leads to any 9–18V DC source and the LED flashes immediately. No external resistor, no timer circuit, no microcontroller required.
The LED flashes whenever power is connected and stops when power is removed. The simplest way to control it is with an inline switch on the power feed. For automated control (e.g., triggering crossing signals when a train approaches), use a relay, MOSFET, or a model railroad detection circuit to switch power to the LED circuit on and off as needed. The LED resumes flashing instantly each time power is restored.
The 0805 / 0807 works well in HO scale (1:87), O scale (1:48), S scale (1:64), and G scale (1:22.5). In HO, the LED body is proportionate to a real-world fixture of about 175mm, appropriate for signal lenses, exit signs, and small warning lights. For N scale (1:160) and Z scale (1:220) where even smaller LEDs are needed, consider the 0603 nano flashing variants.
DCC track power is a bipolar square wave, not pure DC. Add a bridge rectifier (such as the MB1S) between the track bus and your LED lighting bus to convert DCC to DC. DCC voltage (12–16V) falls within the 9–18V operating range. The voltage guide has complete wiring diagrams for DCC lighting installations.
No. The 1.5Hz flash rate is set by the internal controller IC and cannot be adjusted. If you need a different flash rate, you would need to use a steady-on pre-wired LED paired with an external timer circuit (555 timer, Arduino, or dedicated flasher module) that switches the LED power at your desired frequency. The 1.5Hz rate was selected because it closely matches the cadence of most real-world warning beacons and railroad signals.