2x5x7mm Rectangle LED

2x5x7mm rectangle LEDs break the mold of standard round-top through-hole packages.

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2x5x7mm rectangle LEDs break the mold of standard round-top through-hole packages. Where a round 3mm or 5mm LED sits in a circular bezel, the 2x5x7mm rectangle produces a crisp, flat rectangular light output that matches the shape of instrument panel windows, status indicator slots, and rectangular bezel cutouts. The 2×5mm face and 7mm body length give you a compact emitter that press-fits into a simple rectangular opening — no holder, no bezel, just a clean slot punched or laser-cut into the panel. We stock 2x5x7mm rectangle LEDs in multiple colors including red, green, yellow, blue, and white, giving you the full palette needed for multi-color indicator arrays.

The rectangular form factor was originally designed for industrial control panel indicators, where square or rectangular windows in membrane keypads and HMI overlays are far more common than round ones. Builders restoring vintage audio equipment, reel-to-reel tape decks, and 1970s/1980s-era synthesizers use 2x5x7mm rectangle LEDs to replace original rectangular indicator lamps — the footprint matches period panel cutouts without modification. Radio amateurs building homebrew transceivers choose this package for S-meter bar-graph arrays: a row of ten 2x5x7mm LEDs (green, yellow, red) behind a smoked acrylic strip produces a professional-looking signal-strength display that occupies minimal depth behind the front panel.

Guitar pedal builders and synthesizer DIY hobbyists find 2x5x7mm rectangle LEDs useful when a standard round LED looks out of place. Certain boutique pedal enclosures use rectangular indicator windows that a round 3mm or 5mm LED cannot fill cleanly; the 2x5x7mm rectangle covers the entire window with even illumination. Escape room prop builders use rectangular LEDs to simulate display readouts, bomb-timer digit segments, and sci-fi console indicators — the angular shape reads as intentionally engineered rather than hobbyist.

Electrically, 2x5x7mm rectangle LEDs are standard through-hole components with two leads (anode and cathode). Forward voltage follows the same color-based ranges as all standard LEDs: red, orange, yellow, and amber colors run approximately 2.0–2.2V, while blue, green, white, and UV run approximately 3.0–3.2V. Maximum forward current is 20mA. You must always wire a current-limiting resistor in series between your power supply and the LED. Use our LED resistor calculator to find the correct resistor value for your supply voltage and LED color. If you are powering from an AC source such as a model railroad transformer or DCC track power, you will need a bridge rectifier and smoothing capacitor to convert to clean DC before the LED circuit.

Mounting is straightforward: cut or punch a 2.2×5.2mm rectangular slot in your panel material (add 0.1–0.2mm clearance per side for a press fit). The LED body is self-retaining in thin sheet metal or acrylic up to 1.5mm thick. For thicker panels, use a dab of clear epoxy or hot glue on the back side. The two through-hole leads extend straight down and can be soldered directly to a PCB or hand-wired with hookup wire. Lead spacing is standard 2.54mm (0.1″) pitch, compatible with breadboards and standard perfboard.

For projects requiring a round LED instead, browse our full selection of clear-top DIP LEDs in 3mm, 5mm, 8mm, and 10mm sizes. If you want LEDs with built-in resistors for direct connection to 5V, 6V, 9V, or 12V power supplies, see our pre-wired LEDs — no resistor calculation needed, just connect power and ground. For surface-mount projects where board space is critical, our SMD LEDs offer even smaller footprints down to the 0402 package.

The 2x5x7mm rectangle LED fills a niche that no round package can: any application where the light output window is rectangular rather than circular. Industrial control panels, vintage equipment restoration, bar-graph signal displays, custom synthesizer faceplates, boutique guitar pedal indicators, and sci-fi prop consoles all benefit from the clean, geometric light pattern this form factor provides. When you need a professional rectangular indicator and want the simplicity of a standard through-hole LED circuit, the 2x5x7mm rectangle is the right part.

Frequently Asked Questions

Cut a rectangular slot approximately 2.2×5.2mm in your panel material. This provides about 0.1mm clearance per side for a snug press fit. In thin sheet metal or acrylic (under 1.5mm thick), the LED body will self-retain. For thicker panels, secure the LED from behind with a small drop of clear epoxy or hot glue. The lead spacing is standard 2.54mm (0.1″) pitch, so the LED also fits directly into breadboards and standard perfboard for prototyping.
Yes. Many vintage synthesizers, reel-to-reel decks, and audio equipment from the 1970s and 1980s used rectangular indicator lamps behind rectangular panel windows. The 2x5x7mm LED matches these original cutout dimensions closely and draws far less current than incandescent indicator bulbs. Just add a current-limiting resistor appropriate for your equipment’s supply voltage and the LED color’s forward voltage.
The resistor calculation is the same as any standard LED. You need the supply voltage, the LED’s forward voltage (listed on each product page), and the target current (20mA max). Use our LED resistor calculator to find the exact value. As a quick reference: at 12V, a red rectangle LED needs approximately 510Ω; a blue or white needs approximately 470Ω. At 5V, red needs about 150Ω and white/blue about 100Ω.
Line up 8–12 rectangle LEDs side by side in a row of rectangular slots. A typical bar-graph pattern uses green for the lower segments, yellow for the middle, and red for the top. Each LED gets its own current-limiting resistor. Drive them with an LM3914 dot/bar display driver IC or individual GPIO pins from an Arduino or microcontroller. The flat rectangular face of the 2x5x7mm LED produces a clean, uniform bar segment — round LEDs leave visible gaps between segments.
The viewing angle varies by axis because the lens is rectangular rather than round. Along the narrow (2mm) axis, the beam is more focused; along the wider (5mm) axis, it spreads slightly more. Typical viewing angles are 60–110° depending on the specific part and color. This asymmetric beam pattern is actually beneficial for bar-graph and linear indicator applications where you want the light to spread horizontally but stay contained vertically.
Yes. The 2x5x7mm rectangle LED has standard 2.54mm (0.1″) lead spacing, so it plugs directly into a breadboard just like any round through-hole LED. The circuit is identical — anode to the positive rail through a resistor, cathode to ground. The only difference is the shape of the light output. This makes it easy to prototype your bar-graph or indicator design before committing to a permanent build.