Product Overview
Radial Lead Indicator Lamp - 5mm Water-Clear Yellow Diode
Condition
Unused new old stock (NOS). Wire leads are straight, untrimmed, and unsoldered, with longer anode pin intact. Transparent epoxy dome is clean with no chips or cracks. Package and leads carry no printed markings.
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Product Overview
Round 5mm (T-1 3/4) through-hole indicator LED engineered for visual panel indication and breadboard circuit assembly. Built with a water-clear epoxy dome encapsulating a visible internal anvil and post structure, paired with standard dual radial wire leads for direct PCB mounting.
Key Features
- Package style: 5mm (T-1 3/4) round dome
- Mounting: Through-hole radial lead
- Lens appearance: Water-clear transparent epoxy
- Lead configuration: 2-pin radial (longer anode, shorter cathode)
- Stated light output: Yellow emission
- Polarity: Anode positive, cathode negative (requires external current-limiting resistor in DC circuits)
Applications
- Prototyping indicator circuits on solderless breadboards and perfboards
- Status lamp replacement in instrument chassis and control consoles
- Custom panel indicators and alert lights for DIY electronics and microcontroller projects
Frequently Asked Questions
How is polarity identified on these LEDs?
Polarity is indicated by lead length and internal lead frame geometry. The longer wire lead connects to the positive supply (anode). Inside the clear epoxy dome, the smaller internal contact post connects to the anode, while the larger anvil contact connects to the cathode.
Can this LED be connected directly to a DC power supply?
No. Like standard through-hole LEDs, it requires a current-limiting resistor in series to prevent overcurrent damage when connected to a DC source.
Will this LED fit standard 0.1-inch breadboards and T-1 3/4 panel clips?
Yes. The dual wire leads fit standard 0.1-inch (2.54 mm) breadboard spacing, and the 5mm diameter round dome fits standard T-1 3/4 panel mount bezels and clips. More pieces cost less each - the price-break table on this page shows what each quantity costs.
Simple indicators keep honest machines speaking clearly without needing an LCD screen. Solder it in, drop the right resistor in series, and let the yellow tell the story.
