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Super Bright Red 10mm (0.39-Inch) 4-Digit 7-Segment Common Cathode LED Display for Temperature Controllers
Product Overview
Introducing the Super Bright Red 0.39-Inch 4-Digit 7-Segment Common Cathode LED Display—a temperature-focused numeric solution engineered for temperature controllers, home appliances, and instrument panels. Designed to prioritize clarity, energy efficiency, and reliable temp tracking, this 4-digit display excels at showing detailed temperature metrics: precise room temps, sub-zero freezer values or industrial process temps.
Its 10mm (0.39-inch) character height ensures readability from 0.5–2 meters (typical distance for controller operation), while the 40×12.6×7mm form factor fits into slim control panels—no bulky redesigns required. The white segments on a black surface create sharp contrast with super bright red light (620-625nm), cutting through ambient glare and standing out for temp alerts.
With common cathode polarity, low power use, and RoHS compliance, this display balances durability, user-friendliness, and performance—ideal for 24/7 operation in temperature-sensitive devices.
Product Image
Key Features (Temperature Controller-Optimized)
1. Superior Visibility for Temp Readouts
Super Bright Red Illumination (60-70mcd): Red light (620-625nm wavelength) is highly distinguishable in diverse environments, making temp values easy to spot at a glance. It avoids glare in dim spaces and resists washout in bright areas—critical for quickly identifying "too high" or "too low" temps.
White Segments on Black Surface: High contrast eliminates "fuzzy" edges on digits, ensuring clarity for decimal points and negative signs —no misreading "6°C" as "0°C" .
4-Digit Precision: Supports detailed temp readouts — ideal for high-precision controllers that require fine value tracking.
2. Compact & Easy to Integrate
Slim Dimensions (40×12.6×7mm): Fits into dense temperature controller PCBs or small home appliance panels — enables multi-display setups without sacrificing space.
Common Cathode Polarity: Works with standard temperature controller driver ICs — simplifies circuit design, no need for custom polarity adapters, and integrates seamlessly with temp-sensing firmware.
Easy Assembly: Designed for PCB direct-mounting, compatible with automated production lines — speeds up manufacturing for high-volume controllers and ensures consistent alignment in control panels.
3. Energy Efficient & Stable Performance
Low Power Consumption (5-10mA/LED): Extremely low current draw minimizes energy use, extending battery life for portable temperature controllers by 30% compared to higher-current displays. For plugged-in devices, it reduces electricity costs to near-negligible levels.
Stable Operation in Temp Fluctuations: Withstands temperature variations and minor vibrations — maintains consistent brightness, no flickering during temp updates.
Long Lifespan (50,000+ Hours): High-quality red LED chips match the 5–8 year service life of most temperature controllers — eliminates frequent display replacements, reducing maintenance hassle for users and manufacturers.
4. Versatility & Compliance
Multi-Color Options: Beyond super bright red, available in blue (modern aesthetics), yellow green, pure green, pure white, amber, and orange — flexible for functional cues or brand-specific device designs.
RoHS Compliant: Free from lead, mercury, and harmful substances — safe for family-friendly home appliances and export to global markets, meeting temperature controller safety standards.
| Category | Parameter | Specification |
| Basic Design | Display Type | 4-Digit 7-Segment LED Display |
| Polarity | Common Cathode | |
| Character Height | 0.39 inches (10mm) | |
| Outer Dimensions (L×W×H) | 40 × 12.6 × 7mm | |
| Segment/Surface Finish | White segments on Black Surface | |
| Optical Performance | Emitting Color | Primary: Super Bright Red; Optional: Blue/yellow green/pure green/pure white/amber/orange |
| Wavelength (Red) | 620-625nm | |
| Luminous Intensity | 60-70 mcd | |
| Electrical Parameters | Forward Voltage (VF) | 1.8-2.3V per LED (red/amber/orange); 2.8-3.2V (blue/green/pure white) |
| Forward Current | 5-10mA per LED | |
| Power Consumption | Low (extremely low current draw) | |
| Quality & Compliance | Core Advantages | High visibility, stable performance, easy assembly, long lifespan |
| Compliance | RoHS Compliant |
Applications
This display is tailored for temperature controllers and temp-sensitive devices, including:
Temperature Controllers: Smart thermostats, freezer monitors, greenhouse regulators or industrial process controllers.
Home Appliances: Mini fridges, electric ovens or portable ACs .
Instrument Panels: Lab equipment, battery chargers or fitness gear.
Other Devices: Set-top boxes, digital clocks or humidity monitors
Why Choose This Display for Temperature Controllers?
Precision Temp Readability: 4-digit support + red light ensure accurate tracking of fine temps—critical for lab or industrial use.
Space Efficiency: Slim dimensions fit into compact controllers—enables multi-parameter displays (temp + humidity) without clutter.
Battery-Friendly: Low current use extends life for portable devices—ideal for users relying on handheld temp monitors.
Easy Integration: Common cathode polarity + standard size fit existing controller PCBs—saves manufacturers redesign time.
Global Compliance: RoHS certification ensures export to international markets, aligning with safety standards for temp-sensitive devices.
Order & Logistics Information
Minimum Order Quantity (MOQ): 300 pieces for standard super bright red models; 500 pieces for custom colors.
Packing: Anti-static EPE + carton (each display is individually wrapped to protect segments and pins during shipping).
Delivery Time: 5–7 days for standard orders; 10–12 days for custom color 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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