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Common cathode Super Red 2-Digits 0.39inch 7 Segment LED Display for temperature indicator
Product Overview
Introducing the Super Red 2-Digit 7-Segment Common Cathode LED Display—a temperature-focused solution engineered for temperature/humidity indicators, home appliances, and instrument panels. Designed to prioritize clear temp readouts, energy efficiency, and easy integration, this 2-digit display excels at showing concise temperature metrics: room temps, appliance temps or sub-zero values .
Its 0.39-inch (10mm) digit height ensures readability from 0.5–2 meters, while its compact form factor fits into slim device enclosures. The super red illumination cuts through ambient glare without eye strain, making it ideal for quick temp checks in daily use.
With common cathode polarity, low current operation, and RoHS compliance, this display balances durability, eco-friendliness, and performance—perfect for 24/7 operation in temperature-sensitive devices.
Product Image
Key Features (Temperature Indicator-Optimized)
1. High Visibility for Temp Readouts
Super Red Illumination: Red light is highly distinguishable in diverse environments, ensuring temp values stand out at a glance. It avoids glare in dim spaces and resists washout in bright areas, critical for preventing misreads that could impact comfort or safety.
Continuous Uniform Segments: No "hot spots" or dim edges across segments—guarantees consistent readability of digits (0-9) and implied symbols. This uniformity eliminates confusion between similar digits in fast-paced use.
2. Energy Efficiency & Stable Performance
Low Current Operation: Extremely low current draw minimizes energy use, extending battery life for portable temperature indicators and reducing electricity costs for plugged-in devices.
Stable Performance: Withstands temperature fluctuations and minor vibrations—maintains consistent brightness, no flickering during temp updates.
Long Lifespan: High-quality LED chips match the 5–8 year service life of most temperature indicators and home appliances, eliminating frequent display replacements and reducing maintenance hassle.
3. Easy Integration & Versatility
Common Cathode Polarity: Works with standard temperature indicator driver ICs —simplifies circuit design for manufacturers and integrates seamlessly with temp-sensing firmware.
Dual Mounting Options: Easy to mount on PCBs or sockets —flexible for both high-volume home appliances and custom instrument panels.
Broad Compatibility: Beyond temperature indicators, it works for humidity meters, converter displays or appliance settings—adding versatility across device types.
4. Compliance & Safety
RoHS Compliant: Free from lead, mercury, and harmful substances—safe for home use and export to global markets , meeting consumer and industrial safety standards.
| Category | Parameter | Typical Specification |
| Basic Design | Display Type | 2-Digit 7-Segment LED Display |
| Polarity | Common Cathode | |
| Digit Height | 0.39 inch (10mm) | |
| Outer Dimensions (L×W×H) | ~35 × 15 × 7mm | |
| Segment/Surface Finish | White segments on Black Surface | |
| Optical Performance | Emitting Color | Super Red |
| Luminous Intensity | 50-70 mcd | |
| Electrical Parameters | Forward Voltage (VF) | 1.8-2.2V per LED |
| Forward Current | 5-10mA per LED | |
| Quality & Compliance | Core Advantages | Uniform segments, low current, stable performance, long lifespan |
| Compliance | RoHS Compliant |
| Package Dimensions: | 19.86*12.8*7 mm |
| Character height: | 9.9mm (0.39") |
| Polarity | Common ANODE |
| Segment/Face Color | White segment / Black Face |
| Emittng Color: | Super bright red |
| Wavelength | 630-635nm |
| Luminous Intensity: | 50-60 mcd |
| Forward voltage | 1.8-2.2V/led |
Applications
This display is tailored for temperature-focused devices and daily-use electronics, including:
Temperature Indicators: Wall thermostats , portable fridge monitors, greenhouse temp sensors or water heater temp displays.
Home Appliances: Microwaves, electric ovens, mini fridges or air fryers.
Instrument Panels: Industrial temp monitors, battery chargers or fitness equipment
Other Devices: Humidity indicators, voltage converters or smart home hubs
Why Choose This Display for Temperature Indicators?
Temp Readout Clarity: Super red light + uniform segments ensure accurate temp recognition—prevents misreads of critical values.
Energy Efficiency: Low current operation extends battery life for portables and cuts costs for plugged-in devices, aligning with eco-friendly trends.
Easy Integration: Common cathode polarity + dual mounting options simplify production and maintenance, saving manufacturers time and users hassle.
Versatility: Works across temp indicators, appliances, and instruments—reducing the need for multiple display types in device lineups.
Safety Compliance: RoHS certification ensures global use, making it suitable for family-friendly and industrial environments alike.
Order & Logistics Information (Typical for Such Displays)
Minimum Order Quantity (MOQ): 300 pieces for standard models; 500 pieces for custom 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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