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Super bright red common cathode Triple Digit 0.5" 7 Segment LED Display with minus sign for Refrigerator Controller
Product Overview
Introducing the Super Bright Red 3½-Digit 7-Segment Common Cathode LED Display—a fridge-optimized numeric solution engineered for refrigerator controllers, thermostats, and temperature indicators. Unlike standard displays, its "3½-digit" design (supports values from -199 to 999) and dedicated minus sign enable clear display of sub-zero freezer temperatures and positive fridge temps, eliminating ambiguity for users.
Its 12.7mm (0.5-inch) character height ensures readability from 1–2 meters (typical kitchen distance for fridge checks), while the 38.2×19×8mm form factor fits seamlessly into slim fridge control panels. The white segments on a black surface (with film) boosts contrast with super bright red light (630-635nm), cutting through kitchen glare without eye strain—critical for quickly distinguishing fridge vs. freezer temps.
With common cathode polarity, low power consumption, and RoHS compliance, this display thrives in fridge environments and delivers reliable 24/7 performance for home appliances.
Product Image
Key Features (Refrigerator Controller-Optimized)
1. 3½-Digit + Minus Sign for Sub-Zero Freezer Temps
Negative Value Support: Dedicated minus sign enables clear display of freezer temperatures—a must for fridge-freezer combos, where mistaking "18°C" for "-18°C" could spoil frozen food or overcool fresh produce.
3½-Digit Range: Covers -199 to 999, fitting all typical fridge/freezer needs and leaving room for humidity or timer values.
Protective Film: Shields segments from fridge moisture, food splatters, and frequent wiping (common in kitchen use)—prevents scratches, discoloration, and moisture damage, maintaining clarity over the fridge's 10–15 year lifespan.
2. Super Bright Red Visibility for Kitchen Use
Targeted Red Illumination (50-60mcd, 630-635nm): Red light is highly distinguishable in busy kitchens, standing out against stainless steel fridge surfaces or colorful kitchen backdrops. It avoids glare in dim rooms and resists washout in bright sunlight—ensures temps are readable at a glance.
White Segments on Black Surface: High contrast eliminates "fuzzy" edges on small digits, making minus signs and decimal points sharp—no misreading "-8°C" as "8°C"
Uniform Segment Lighting: No "hot spots" or dim areas across segments—guarantees consistent readability of every digit for accurate temp tracking.
3. Energy Efficiency & Stable Performance
Low Power Consumption (5-10mA/LED): Extremely low current draw minimizes fridge energy use—critical for ENERGY STAR-certified models, reducing electricity bills and extending backup battery life .
Wide Temperature Tolerance: Operates seamlessly in -30°C to +50°C —no brightness dimming, segment failure, or condensation buildup in cold environments, ensuring consistent performance year-round.
Long Lifespan (50,000+ Hours): High-quality red LED chips match the fridge's service life, eliminating frequent display replacements—reducing maintenance hassle for users and lowering long-term costs.
4. Easy Integration & Versatility
Common Cathode Polarity: Works with standard fridge driver ICs—simplifies circuit design for manufacturers and integrates seamlessly with fridge firmware
Easy Assembly: Designed for PCB direct-mounting, compatible with automated production lines—speeds up fridge manufacturing and ensures consistent alignment in control panels, avoiding misinstallation issues.
Multi-Color Options: Beyond super bright red, available in blue, green, white, amber, and orange—flexible for functional prompts or brand-specific fridge designs.
RoHS Compliant: Free from lead, mercury, and harmful substances—safe for family kitchens and export to global markets, meeting home appliance safety standards.
| Category | Parameter | Specification (Refrigerator-Optimized) |
| Basic Design | Display Type | 3½-Digit 7-Segment LED Display (with minus sign, supports -199 to 999) |
| Polarity | Common Cathode | |
| Character Height | 12.7mm (0.5 inch) | |
| Outer Dimensions (L×W×H) | 38.2 × 19 × 8mm | |
| Segment/Surface Finish | White segments on Black Surface + protective film | |
| Optical Performance | Emitting Color | Primary: Super Bright Red; Optional: Blue/green/white/amber/yellow/orange/multicolor |
| Wavelength (Red) | 630-635nm | |
| Luminous Intensity | 50-60 mcd | |
| Electrical Parameters | Forward Voltage (VF) | 1.8-2.2V per LED; 2.8-3.2V |
| Forward Current | 5-10mA per LED | |
| Power Consumption | Low | |
| Quality & Compliance | Core Advantages | Minus sign support, stable performance, easy assembly, long lifespan |
| Certificate | RoHS Compliant |
Applications
While optimized for refrigerator controllers, this display also excels in:
Thermostats: Home HVAC thermostats, smart thermostats
Air Conditioners: AC control panels, portable ACs
Temperature Indicators: Freezer monitors, cold storage sensors, wine coolers
Heating/Cooling Devices: Space heaters, heat pumps, mini fridges
Why Choose This Display for Refrigerators?
Sub-Zero Clarity: Minus sign eliminates temp ambiguity—prevents food spoilage from incorrect freezer temp readings.
Kitchen-Friendly Visibility: Red light + high contrast ensure temps are readable in all lighting, even with kitchen distractions.
Fridge-Sized Fit: Slim dimensions fit standard fridge control panels—no need to resize existing designs.
Energy & Cost Savings: Low power use cuts fridge energy bills; long lifespan reduces replacement costs.
Global Compliance: RoHS certification simplifies export to key markets, aligning with family-friendly appliance standards.
Order & Logistics Information
Minimum Order Quantity (MOQ): 300 pieces for standard super bright red models; 500 pieces for custom colors/configurations.
Packing: Anti-static EPE + carton
Delivery Time: 5–7 days for standard orders; 10–12 days for custom variants
Transport: Express, Air, Ocean
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 customzied 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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