The 1-Digit 7-Segment Green Colour 4-inch Common Anode LED Display is a large-format numerical display module engineered for high-visibility visual readouts in industrial, commercial, and outdoor electronic systems. Featuring a 4.0-inch (101.6mm) character height with vibrant green GaP/InGaN LED segment illumination, this display incorporates multiple internal LED dies wired in series per segment to ensure uniform brightness, high contrast, and wide viewing angles up to 100 meters away. Encapsulated in a rugged epoxy resin package with a black face and white diffused segment bars, the common anode configuration ties all positive LED terminals together to a shared supply line while individual segments (A through G and Decimal Point) are switched via low-side driver circuits. It is widely used in queue management systems, digital clocks, industrial production scoreboards, token display panels, and automated petrol pump price indicators.

Specifications

• Part Number / Model: 40011AG / 40101AG (Standard 4.0-inch 1-Digit 7-Segment Series)
• Display Type: 1-Digit 7-Segment Numerical LED Display with Decimal Point (DP)
• Digit Height: 4.0 Inch (101.6 mm)
• Module Dimensions: 122.0 mm (Height) × 90.0 mm (Width) × 15.0 mm (Thickness) ±0.5 mm
• Circuit Polarity: Common Anode (CA - Shared Positive Rail)
• Emitted Light Color: Pure Green / Yellow-Green
• Dominant Wavelength (λd): 520 nm to 570 nm (Peak Wavelength λp ≈ 565 nm)
• Die Configuration per Segment: 4 to 5 LED dies in series per segment (A–G); 2 LED dies in series for Decimal Point (DP)
• Forward Voltage Drop per Segment (VF - Segments A to G): Typ. 8.0V to 10.0V / Max. 12.0V (at IF = 20mA)
• Forward Voltage Drop for Decimal Point (VF - DP): Typ. 4.0V to 4.4V / Max. 5.0V (at IF = 20mA)
• Continuous Forward Current per Segment (IF): 20 mA (Continuous) / Max. 30 mA
• Peak Pulse Forward Current (IFP): Up to 100 mA (Duty ratio 1/10, 0.1ms pulse width)
• Reverse Breakdown Voltage per Segment (VR): 15V to 25V (Segments A–G) / 10V (DP)
• Luminous Intensity (Iv): 60 mcd to 120 mcd per segment (at IF = 20mA)
• Face & Segment Color: Black Surface Face with White Diffused Translucent Segment Lenses
• Power Dissipation per Segment (Pd): Up to 250 mW (Segments A–G) / 100 mW (DP)
• Operating Ambient Temperature (Topr): -25°C to +85°C
• Storage Temperature Range (Tstg): -30°C to +85°C
• Pinout Configuration: Standard 10-Pin Through-Hole DIP Header (Pins typically arranged top/bottom: Common Anode pins, Segments A, B, C, D, E, F, G, and DP)

Features

• Large 4.0-Inch Digit Profile: Oversized character height ensures clear legibility and crisp visibility from long distances in bright indoor and outdoor environments.
• High-Efficiency Green Illumination: Precision green LED dies deliver bright, uniform light emission across all segment bars with minimal power consumption.
• Common Anode Architecture: Simplifies low-side switching using standard Darlington transistor arrays (such as ULN2003 / ULN2803), constant-current shift registers (TPIC6B595), or discrete NPN/N-channel MOSFET switches.
• Multi-Die Series Structure: Segments feature matched multi-die internal series strings to eliminate hotspotting and provide uniform light distribution across each segment bar.
• High-Contrast Rugged Housing: Matte black front panel combined with milky-white diffused lenses maximizes contrast under direct ambient daylight.

Common Applications

• Queue Management & Token Displays: Customer numbering and counter callout boards in banks, hospitals, and government service centers.
• Industrial Production Counters & Scoreboards: Factory output monitors, digital tally boards, sports scoreboards, and timing clocks.
• Fuel Station Price Indicators: Digital price panels and pump volume readouts on commercial petrol dispenser displays.
• Weighing Scales & Truck Bridges: Large-format numerical weight indicators for commercial weighbridges and crane scales.
• Gym & Fitness Interval Timers: Wall-mounted workout timers, countdown clocks, and race lap counters.

Usage Tips

• Dedicated 12V Supply Rail: Because segments A–G have 4 to 5 internal LED dies in series requiring 8V to 10V forward drop, **do not attempt to drive this display directly from 5V logic rails**. Power the Common Anode rail from a regulated +12V DC power source.
• Separate Current-Limiting Resistor for DP: The Decimal Point (DP) contains fewer LED dies (approx. 4V to 4.4V drop) compared to segments A–G (~9V to 10V drop). Always calculate and use a higher value series resistor for the DP pin to prevent over-current burn-out when driving from a 12V supply.
• Use Low-Side High-Voltage Drivers: Drive segment cathodes using open-collector / open-drain driver ICs such as the **ULN2803A Darlington array** or **TPIC6C595 / TPIC6B595 power shift registers** controlled by a 3.3V or 5V microcontroller (Arduino, ESP32, or STM32).
• Series Resistor Calculation Formula: For segments A–G from a 12V rail at 20mA: R_seg = (Vsupply - VF_seg) / IF = (12V - 9.0V) / 0.02A ≈ 150Ω (rated for at least 1/4W). For DP: R_dp = (12V - 4.2V) / 0.02A ≈ 390Ω.

Datasheet