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Red 3 digit Common Cathode 7segment LED Display for Refrigerator Controller
Product Overview
This red 3-digit common cathode 7-segment LED display is a tailored solution for refrigerator controllers, designed to deliver clear, reliable temperature readouts and system status alerts in the dynamic thermal environments of home and commercial refrigeration systems. With flexible digit height options (0.25"–20"), standardized 7-segment configuration, and customizable housing finishes, it integrates seamlessly with existing refrigerator control panel PCB layouts without requiring structural redesigns.
Featuring high-intensity red illumination, uniform light distribution, and ultra-low power consumption, the display maintains crisp visibility even under direct kitchen sunlight or in dim pantry settings. Its robust construction ensures stable operation across temperature fluctuations (10°C–40°C) and voltage variations, while full RoHS/REACH compliance supports global market deployment. Beyond refrigerators, it adapts to elevator floor indicators, industrial process monitors, and smart home appliance interfaces, maximizing production versatility for manufacturers.
Product Descripition
| Digit number | 3 digit | 2digits,3digits, 4digits,5digits,6 digits |
| Digit height | 13.2mm | 0.25,0.36,0.39....5.0(inch) |
| Color | RED | White, blue,pure green, yellow-green, orange,etc. |
| Size | 40*19*8mm | Other size are supported |
| Polarity | Common Cathode | Common Cathode |
| Life span | 80000hours | |
| Free Samples | supported | |
| Lead time for sample | 5-7 working days | Tooling samples are 15-20 working days |
| Lead time for formal order | 15-20 working days | According to order quantity |
| OEM&ODM | Support | Based on customer's drawing or idea |
| LOGO printing | Support | Based on customer's drawing or idea |
| MOQ | 1000PCS | Can accept 100-500pcs for first order |
Product Image
Key Features (Refrigerator Controller-Optimized)
1. Refrigerator-Environment Resilience & High-Visibility Readability
High-Intensity Red Illumination: Red light is highly distinguishable in busy kitchen environments, cutting through overhead light glare and direct sunlight to ensure critical temperature values (e.g., 4°C fridge temp, -18°C freezer temp) and fault codes (e.g., E01 defrost error, E02 sensor failure) are readable at a glance—critical for preventing food spoilage and ensuring refrigerator energy efficiency.
Uniform Segment Light Distribution: Advanced optical design ensures ≤5% brightness variation across all segments, eliminating dim or over-bright digits that could cause misreads of precision temperature values (e.g., 2°C vs 20°C) and impact refrigerator performance.
Stable Operation Across Thermal Ranges: Built to withstand the temperature fluctuations of kitchen environments (10°C–40°C) and the cool interior of fridge control panels, the display delivers consistent performance without flickering or segment failure during 24/7 continuous operation.
2. Energy Efficiency for Low-Power Refrigerator Systems
Ultra-Low Power Consumption: Minimizes energy draw for refrigerator controller displays that run non-stop, aligning with global energy-saving standards for smart home appliances. The efficient design avoids unnecessary power drain that could increase the fridge's overall energy usage and operating costs.
Optimized Current Utilization: Precision-engineered circuitry delivers maximum brightness output with minimal current, reducing heat generation in the sealed fridge control panel enclosure—critical for preventing component overheating and extending the display's service life in confined spaces.
3. Manufacturer-Friendly Customization & Seamless Integration
Flexible Configuration Options: Digit height can be tailored from 0.25" (ideal for compact mini fridges and beverage coolers) to 20". For advanced fridge controllers that require alphanumeric displays, 14/16-segment upgrades are available without retooling production lines.
Customizable Housing Finishes: Choose from black (sleek modern look), gray (neutral kitchen integration), or red (high-contrast alert design) to match your refrigerator brand's aesthetics—no extra tooling costs for standard finish options.
Common Cathode IC Compatibility: Works seamlessly with mainstream driver ICs and refrigerator control microcontrollers. Simplifies circuit design for temperature display, unit switching (°C/°F), and fault code alert triggers.
4. Versatile Cross-Application Compatibility
Beyond refrigerator controllers, this display adapts to diverse industrial and consumer electronics scenarios:
Vertical Transportation: Elevator floor position indicators, directional up/down guidance displays.
Digital Information Systems: Public message boards, information kiosk numeric readouts.
Industrial Monitoring: Process control temperature/pressure displays, precision measurement readouts.
Smart Home Appliances: Oven timers, thermostat panels, dishwasher status indicators.
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 .
Light Bo 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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