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Ultra White Small size 4 Digit 7 Segment LED Display 0.28inch common cathode for Instrument Panel
Product Overview
This 0.28-inch (7.10mm) 4-digit common cathode 7-segment LED display is a space-optimized solution engineered for instrument panels, set-top boxes, home appliances, and compact digital indicators. Boasting an ultra-slim 32×10.3×5.8mm form factor, it fits seamlessly into dense PCB layouts where installation space is limited—ideal for portable instruments, smart home controllers, and small-scale industrial monitoring devices.
With yellow segments on a black surface and ultra bright white light output (120–140mcd/LED), it delivers exceptional contrast and readability at close viewing distances (0.3–2 meters). The common cathode polarity ensures compatibility with mainstream driver ICs (e.g., TM1637, MAX7219, HT1621), while low power consumption and long lifespan make it suitable for 24/7 stable operation in both industrial and residential scenarios. RoHS compliance further enables global market deployment without regulatory barriers.
Core Technical Specifications
| Category | Parameter | Specification (Instrument Panel-Optimized) |
| Basic Design | Display Type | 4-Digit 7-Segment LED Display |
| Digit Height | 0.28 inch (7.10mm) | |
| Outer Dimensions (L×W×H) | 32 × 10.3 × 5.8mm | |
| Segment/Surface Finish | Yellow Segments on Black Surface | |
| Polarity | Common Cathode | |
| Optical Performance | Primary Emitting Color | Ultra Bright White |
| Luminous Intensity | 120–140 mcd/LED | |
| Optional Emitting Colors | Red, Blue, Yellow Green, Pure Green, Amber, Orange, Yellow | |
| Electrical Parameters | Forward Voltage (VF) | 2.8–3.2V/LED (white/blue/green variants) |
| Forward Current | 5–10mA/LED | |
| Quality & Compliance | Core Advantages | High luminous intensity, uniform segment brightness, big viewing angle, stable performance, long lifespan, easy assembly, IC compatible |
| Compliance | RoHS Compliant |
Key Features (Instrument Panel-Optimized)
1. Ultra-Compact Size & High-Contrast Visibility
Space-Saving 32×10.3×5.8mm Profile: The slim dimensions fit into narrow PCB slots of portable instruments, set-top box remote controls, and smart home appliance panels—no need for custom PCB redesigns, supporting high-density component layouts.
Yellow Segments + Black Surface Contrast: Eliminates ambient light glare (e.g., factory overhead lamps, home room lighting) and ensures 4-digit values (e.g., "0125" rpm, "25.50" °C, "E001" error code) are crisp and easy to read, even in bright environments.
120–140mcd High Luminous Intensity: Delivers bright, eye-friendly illumination for close-range viewing (typical for instrument panels held in hand or mounted on equipment dashboards), avoiding readability issues caused by low brightness.
2. Energy Efficiency & Long-Term Reliability
Low Power Consumption & Extremely Low Current: 5–10mA/LED minimizes energy use for battery-powered portable instruments (e.g., handheld thermometers, pressure gauges) and reduces standby power draw for set-top boxes and home appliances, extending battery life and lowering operational costs.
Uniform Segment Brightness: No brightness variation across segments prevents digit distortion (e.g., "8" appearing dim on one side) and ensures consistent readability of critical precision values in instrument panel applications.
Long Lifespan (50,000+ Hours): High-quality LED chips and robust epoxy construction match the 8–10 year service life of most instruments and home appliances, eliminating frequent display replacements and maintenance downtime.
3. Manufacturer-Friendly Easy Integration
Common Cathode IC Compatibility: Works seamlessly with standard driver ICs and microcontrollers (Arduino, ESP32, PLCs) widely used in instrument panels and home electronics. Simplifies circuit design for real-time data display (e.g., temperature sampling, speed monitoring, error code alerts).
Big Viewing Angle (≥120° H/V): Ensures clear readability from multiple angles—critical for instrument panels mounted on equipment where users may not be standing directly in front of the display.
Automated Assembly Support: Standardized through-hole or SMT pinout design is compatible with high-volume production lines, speeding up manufacturing for instrument and appliance manufacturers.
4. Multi-Color Versatility for Functional Differentiation
Optional emitting colors enable targeted use across diverse applications:
Red: High-visibility for over-limit alarms
Pure Green: Normal/optimal status cues
Amber: Warm tones for home appliance timers
Blue: Modern aesthetics for premium smart home device panels
Product Image
Product Parameters
Absolute Maximum Ratings(Ta=25ºC)
| Parameter | Symbol | Ratings | Unit |
| Forward Current(per dice) | Ipm | 20 | mA |
| Reverse Voltage(per dice) | Vr | 5 | V |
| Power Dissipation(per dice) | Pm | 80 | mW |
| Operating Temperature Range | Topr | -40~+85 | ºC |
| Storage Temperature Range | Tstg | -40~+85 | ºC |
| Solder Temperature(≤3 seconds) | Th | 260 | ºC |
Code:Yellow Green- J
| Parameter | Symbol | Condition | Min | Typ | Max | Unit |
| Forward Voltage | Vf | If=10mA | 1.8 | 2.4 | V | |
| Reverse Voltage | Vr | Ir=10uA | 5 | V | ||
| Luminous Intensty | Iv | If=10mA | 30 | 40 | mcd | |
| Spectrum With Of Half Value | △λ | If=10mA | 20 | nm | ||
| Wavelength | Dλ | If=10mA | 569 | 574 | nm |
Code:Amber/Yellow -Y
| Parameter | Symbol | Condition | Min | Typ | Max | Unit |
| Forward Voltage | Vf | If=10mA | 1.8 | 2.5 | V | |
| Reverse Voltage | Vr | Ir=10uA | 5 | V | ||
| Luminous Intensty | Iv | If=10mA | 60 | 80 | mcd | |
| Spectrum With Of Half Value | △λ | If=10mA | 20 | nm | ||
| Wavelength | Dλ | If=10mA | 585 | 595 | nm |
Code:Orange -F
| Parameter | Symbol | Condition | Min | Typ | Max | Unit |
| Forward Voltage | Vf | If=10mA | 1.8 | 2.4 | V | |
| Reverse Voltage | Vr | Ir=10uA | 5 | V | ||
| Luminous Intensty | Iv | If=10mA | 60 | 80 | mcd | |
| Spectrum With Of Half Value | △λ | If=10mA | 20 | nm | ||
| Wavelength | Dλ | If=10mA | 600 | 605 | nm |
Code:Super Bright Red -R
| Parameter | Symbol | Condition | Min | Typ | Max | Unit |
| Forward Voltage | Vf | If=10mA | 1.8 | 2.2 | V | |
| Reverse Voltage | Vr | Ir=10uA | 5 | V | ||
| Luminous Intensty | Iv | If=10mA | 50 | 60 | mcd | |
| Spectrum With Of Half Value | △λ | If=10mA | 20 | nm | ||
| Wavelength | Dλ | If=10mA | 630 | 635 | nm |
Code:Ultra Bright Red -UR
| Parameter | Symbol | Condition | Min | Typ | Max | Unit |
| Forward Voltage | Vf | If=10mA | 1.8 | 2.2 | V | |
| Reverse Voltage | Vr | Ir=10uA | 5 | V | ||
| Luminous Intensty | Iv | If=10mA | 80 | 100 | mcd | |
| Spectrum With Of Half Value | △λ | If=10mA | 20 | nm | ||
| Wavelength | Dλ | If=10mA | 625 | 635 | nm |
Code:Pure Green -G
| Parameter | Symbol | Condition | Min | Typ | Max | Unit |
| Forward Voltage | Vf | If=10mA | 2.6 | 3.2 | V | |
| Reverse Voltage | Vr | Ir=10uA | 5 | V | ||
| Luminous Intensty | Iv | If=10mA | 120 | 180 | mcd | |
| Spectrum With Of Half Value | △λ | If=10mA | 20 | nm | ||
| Wavelength | Dλ | If=10mA | 515 | 525 | nm |
Code:Ultra Bright Blue -BH
| Parameter | Symbol | Condition | Min | Typ | Max | Unit |
| Forward Voltage | Vf | If=10mA | 2.8 | 3.2 | V | |
| Reverse Voltage | Vr | Ir=10uA | 5 | V | ||
| Luminous Intensty | Iv | If=10mA | 120 | 140 | mcd | |
| Spectrum With Of Half Value | △λ | If=10mA | 20 | nm | ||
| Wavelength | Dλ | If=10mA | 460 | 465 | nm |
Code:Ultra Bright White -WH
| Parameter | Symbol | Condition | Min | Typ | Max | Unit |
| Forward Voltage | Vf | If=10mA | 2.8 | 3.2 | V | |
| Reverse Voltage | Vr | Ir=10uA | 5 | V | ||
| Luminous Intensty | Iv | If=10mA | 120 | 140 | mcd | |
| LED color Temperature | K | If=10mA | 5500 | 20 | 6800 | K |
Chromaticity Coordinates | X/Y | If=10mA | 0.29,0.32 | 0.30,0.33 | nm |
Shenzhen Guangzhibao Technology Co., Ltd. (Brand: Light-Bo) stablished in 2006 , A company that integrates R & D, manufacturing and sales of optoelectronics LED Displays . ISO 9001 2015 Quality Management Systems certified company . With more than 15 years OEM and ODM experience .
LightBo has been committed to provide high quality and low cost customized solutions to help customers reduce cost and enhance competitiveness.
Products Applications
7 Segment LED Display, Customized LED Display, Numeric LED Display, Dot matrix LED Display, widely used for home appliances,tempearture indicators, humidity indicators, refrigerator controller,thernostats indicator,heating and cooling control and so on.
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FAQ
FAQ(Frequently Asked Questions)
Q1 Are you trading company or manufacturer
A: We are original manufacturer with more than 20 years experience in optoelectronic LED displays .
Q2 What is your main products
A: Our main products include 7 Segment LED display, SMD LED Display,Dot matrix LED Display, Arrow LED display, Custom Design LED Display ,LED light bar,Through hole led, SMD LEDs,LED Backlights, and so on .
Q3 What is your MOQ
A: Our MOQ is 1000 pcs , We can also accept sample orders and small orders with quantity less than our MOQ .
Q4 Before placing order, Can I get some samples for test
A: Yes. We can provide 5-10 free samples for your testing, but the freight cost will be borne by the customer.
Q5 How long is your delivery time
A: Delivery time:About 10-20 days; According to order quantity and raw materials. If you have urgent order,and we have raw materials in stock,we can adjust our production plan to make it ready within 7-10 days .
Q6 What is your terms of payment
A: We accept bank transfer,T/T,Western Union and Paypal with small amount. Detailes of payment methods can be negotiatble.
Q7 Can you quote me FOB prices
A: Yes. We can quote you prices based on incoterms EXW, FOB, CIF,DDP.
Q8 How can I get your catalogue and price list
A: Yes . Please let us know your email address or contact us from website directly for our catalogue and price list .
Q9 Can I negotiate the prices
A: Yes, we may consider discounts for bulk orders.
Q10 How much will the shipping charges be
A: It depends on the size of your shipment and the method of shipping.We will offer the charge to you as you requested.
Q11 Can you do custom design products
A: Yes , OEM&ODM service are available .We can customize the sizes,led color and functional icons according to your requirements.
Q12 If I send my design , can you make it for myself only ,and will not show it to any one else
A: Yes , we will not show it or sell to others without your authorization.
Q13 What will be the samples lead time for customized products
A: Samples lead time will be about 20-25 working days after receiving mold cost and mold drawing approval from customers .
Q14 What is the shipping methods
A:We usually ship the goods by DHL, FEDEX,UPS,EMS,BY AIR,BY SEA etc, also you can choose the other way that best for you.
Q15 How do you ensure the quality of your products
A: we are ISO 9001 QMS ceritified manufacturers with more than 20 years experience ,We conduct twice 100% percent test for all of our products before shipment .
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