Ultra Bright White 12mm (0.47-Inch) 2-Digit 7-Segment Common Cathode LED Display for Water Heater Temperature Control

Ultra Bright White 12mm (0.47-Inch) 2-Digit 7-Segment Common Cathode LED Display for Water Heater Temperature Control

Product Overview
Introducing the Ultra Bright White 12mm 2-Digit 7-Segment Common Cathode LED Display—a water heater-optimized numeric solution engineered for temperature controllers, home appliances, and compact digital indicators. Designed to prioritize clarity, heat resistance, and space efficiency, this 2-digit display excels at showing water heater temperatures (e.g., “45°C” for warm, “75°C” for hot) and other short-value metrics (e.g., “08” for appliance timer, “22” for room temp).
Its 12mm (0.47-inch) digit height ensures readability from 0.5–1.5 meters (typical distance for water heater control panels), while the 20.9×13.9×5.9mm form factor fits seamlessly into slim water heater enclosures—no bulky redesigns required. The yellow segments on a black surface create sharp contrast with ultra bright white light (120-140mcd), cutting through bathroom/utility room glare (e.g., overhead lights, steam fog) without eye strain.
With common cathode polarity, fast heat dissipation, and RoHS compliance, this display delivers reliable performance for 24/7 operation in water heaters (where heat and humidity are common) and other home appliances.

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Key Features (Water Heater Temperature Control-Optimized)
1. Superior Visibility for Water Heater Temps
Ultra Bright White Illumination (120-140mcd): Among the brightest in its class, it cuts through bathroom steam, utility room glare, or dim lighting—ensuring users can quickly check water temp (e.g., “50°C”) without squinting, even when the heater is mounted high on a wall.
Yellow Segments on Black Surface: The yellow segment base enhances contrast with the black background, eliminating “fuzzy” edges on digits (e.g., distinguishing “6” from “8”)—critical for avoiding scalds (e.g., mistaking “75°C” for “45°C”).
Wide Viewing Angle: Uniform light distribution ensures readability from off-center positions (e.g., glancing at the heater while filling a tub)—ideal for busy bathrooms or utility spaces.
2. Heat Resistance & Stable Performance
Fast Heat-Dissipation: Specialized design prevents heat buildup, even when the water heater runs at high temps (e.g., 80°C+) or is mounted near heating elements. Avoids brightness dimming or segment failure due to overheating.
Stable Operation in Humid/Hot Environments: Withstands temperature fluctuations (-10°C to 60°C, typical for bathrooms/utility rooms) and high humidity (steam from showers)—maintains consistent brightness, no flickering during temp updates.
Long Lifespan (50,000+ Hours): High-quality white LEDs and heat-resistant materials match the 8–10 year service life of most water heaters—eliminates frequent display replacements, reducing maintenance hassle for users.
3. Energy Efficiency & Easy Integration
Low Power Consumption (5-10mA/LED): Extremely low current draw minimizes energy use for water heaters (which run daily) and extends battery life for portable temperature indicators (e.g., handheld water temp meters).
Optimized Forward Voltage (2.8-3.2V/LED): Compatible with standard 5V/12V power supplies used in water heater controllers—no need for custom voltage converters, simplifying circuit design for manufacturers.
Common Cathode Polarity: Works with standard driver ICs (e.g., TM1637, HT1621) widely used in temperature controllers—integrates seamlessly with water heater firmware (e.g., temp sampling, heat-on/off triggers) without extra wiring.
Easy Assembly: Designed for PCB direct-mounting, compatible with automated production lines—speeds up water heater manufacturing and ensures consistent display alignment in control panels.
4. Versatility & Compliance
RoHS Compliant: Free from lead, mercury, and harmful substances—safe for home use (especially around water) and export to global markets (EU, North America, Asia), meeting water heater safety standards.
Multi-Scenario Use: Beyond water heaters, ideal for other 2-digit needs: small ovens (temp “200°C” → displays “20”), room thermostats (temp “25°C”), or coffee makers (brew temp “95°C”).

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Technical Specifications

Shenzhen Guangzhibao (Light-Bo) Technology Co. Ltd is specialized in LED products, including LED 7 segment numeric displays, alphanumeric LED displays,dot-matrix LED Displays, SMD LEDs, LED lamps,LCD backlights,LED light bar, bar gragh arrays and LED direction indicator displays and more.
We offer top quality products at competitive prices to meet different requirement for industry applications. We introduced computerized operation system and complete QC system. Key raw materials are sourced from the US, Japan and Taiwan area, plus,we utilise an array of advanced production equipments from ASM and Risen,such as automatic dice bonding and wire soldering machines . We specialise in offering series of optoelectronic displays in pure green, pure white and ultra blue.All of our products comply with the RoHS Directives. Monthly capacity reaches 3,000,000pcs.
We have been in LED industry for more than 12 years. With more than 10 years OEM and ODM experience, our R&D engineers are at hand for your customization requirements. Samples can be ready in just 10-15 days. Contact us now !