LED Lamps L-934SED Super Bright Orange 3mm Dome - Product & Specs

Key specifications

Below are typical electrical and optical specs for a super-bright 3mm orange dome LED like the L-934SED. Always check the specific datasheet for exact values.

Selection guidance

When choosing the L-934SED or similar 3mm orange dome LEDs, match electrical and optical requirements to your application: panel visibility, power budget, and physical mounting. Consider the following practical factors used in South African workshops and labs.

• Voltage budget: confirm the LED forward voltage (Vf) and size resistors or drivers accordingly.
• Current and brightness: for indicator lights, 5-10 mA often suffices; for long-distance visibility, push toward 15-20 mA if thermal limits allow.
• Lens type: choose dome-clear for focused beams and crisp dots on panels; pick diffused lenses where wider viewing angles are needed.
• Mounting: 3mm LEDs fit standard 3mm holes and PCB footprints; check lead length and polarity markings.

Basic calculations & example

Use Ohm's law to set the series resistor for a single LED on a DC supply. Formula: R = (Vsupply - Vf) / If. Power dissipated in the resistor: P = (Vsupply - Vf) * If.

Example (12 V supply, 10 mA target)

R = (12 V - 2.1 V) / 0.01 A = 990 Ohm ~ 1 kOhm. Resistor power: P = (12 V - 2.1 V) * 0.01 A = 0.099 W, so a 1/4 W resistor is acceptable. For reliability in hot environments, a 1/2 W resistor is conservative.

Wiring diagram (single LED with resistor)

+12V ----////----|>---- GND
         R=1k      LED (anode->cathode)

Compatibility & accessories

Common accessories for L-934SED installations include: LED holders for panel mounting, resistor kits, pre-wired LED leads, and diffusers. When integrating with microcontroller outputs, use current-limiting resistors or dedicated LED driver ICs for multiplexing or PWM dimming.

Troubleshooting

• LED not lighting: check polarity (longer lead = anode), verify resistor value and supply voltage.
• Dim output: measure If; inspect solder joints and possible voltage drop across wiring or connectors.
• Overheating/discolouration: reduce current or add heat management; verify LED rated current.

Local buying & sourcing notes

Communica offers single units and reels of 3mm LEDs, plus resistor assortments and panel hardware. For education and labs, request a VAT invoice and bulk lead-time estimate when ordering larger quantities. Typical classroom or maker-club sets (packs of 50-100) are often available from stock at Samrand; for larger reels, allow for supplier lead times which vary by brand.

Common use cases in South Africa

• Status indicators on DIY panels and enclosures used in workshops and student projects.
• Signal lights on small appliances and educational kits where clear orange signalling is preferred.
• Prototyping on breadboards and PCBs in tertiary labs where compact, bright indicators are needed.

Sources

• Communica product categories and stock listings
• LED basics and practical guidance
• SparkFun LED tutorial (resistors, calculations, wiring)