Ultra Bright Red 7mm (0.28-Inch) 3-Digit 7-Segment Common Anode LED Display for Temperature Controllers

Product Overview

Introducing the Ultra Bright Red 7mm 3-Digit 7-Segment Common Anode LED Display—a miniaturized, high-visibility solution engineered for temperature controllers, compact home appliances, and instrument panels. Designed to balance space efficiency, clear temp readouts, and energy efficiency, this 3-digit display excels at showing temperature metrics: room thermostats (e.g., "22°C"), freezer monitors (e.g., "-18°C"), or equipment test temps (e.g., "150°C").

Its 7mm (0.28-inch) character height ensures readability from 0.5–1.5 meters (typical distance for compact controllers), while the 22.5×10×6.1mm form factor fits into dense PCB layouts or tiny device enclosures—no need to sacrifice functionality for size. The white segments on a black face create sharp contrast with ultra bright red light (620-625nm), cutting through ambient glare (e.g., kitchen lights, workshop lamps) and standing out for temp alerts (e.g., "30°C" high temp).

With common anode polarity, low power consumption, and RoHS compliance, this display delivers reliable performance for 24/7 operation in temperature-sensitive devices—ideal for both home and industrial use.

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Key Features (Temperature Controller-Optimized)

1. Superior Visibility for Temp Readouts

Ultra Bright Red Illumination (70-90mcd): Red light (620-625nm wavelength) is highly distinguishable in diverse environments, making temp values easy to spot at a glance—critical for quickly identifying "too high" (e.g., "35°C") or "too low" (e.g., "0°C") temps. It avoids glare in dim spaces (e.g., bedroom thermostats) and resists washout in bright areas (e.g., kitchen appliance panels).

White Segments on Black Face: High contrast eliminates "fuzzy" edges on small digits, ensuring clarity for decimal points (e.g., "24.5°C") and negative signs (e.g., "-15°C" for freezers)—no misreading "6°C" as "0°C" (a costly mistake for food storage or equipment safety).

Continuous Uniform Segments: No "hot spots" or dim areas across segments (laboratory-tested <2% brightness variation), so every bar of digits (e.g., the middle bar of "5") is consistent—guarantees accurate temp recognition.

2. Ultra-Compact & Easy to Integrate

Miniature Dimensions (22.5×10×6.1mm): Among the slimmest 3-digit 7-segment displays, fitting into compact temperature controllers (e.g., portable HVAC monitors), tiny home appliances (e.g., mini humidifiers), or dense instrument panels (with 3+ displays for multi-parameter tracking). No need to resize PCBs or redesign device enclosures.

Dual Mounting Options: Easy to mount on PC boards (for automated mass production) or sockets (for manual replacement/maintenance)—flexible for both high-volume home appliances and custom industrial controllers.

Common Anode Polarity: Works with standard temperature controller driver ICs (e.g., TM1637, HT1621, MAX7219)—simplifies circuit design, no need for custom polarity adapters, and supports seamless integration with temp-sensing firmware (e.g., real-time temp sampling, alert triggers).

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 (e.g., handheld fridge thermometers) by 30% compared to higher-current displays. For plugged-in devices (e.g., wall thermostats), it reduces electricity costs to near-negligible levels.

Stable Operation in Temp Fluctuations: Withstands temperature variations (-10°C to 50°C, typical for indoor/outdoor use) and minor vibrations (e.g., appliance fan movement, equipment transport)—maintains consistent brightness, no flickering during temp updates (e.g., when AC cycles on/off).

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 ultra bright red, available in blue (modern aesthetics), yellow green (eco-aligned designs), pure green, pure white, amber, and orange—flexible for functional cues (e.g., green for "normal temp", red for "alert") or brand-specific device designs.

RoHS Compliant: Free from lead, mercury, and harmful substances—safe for family-friendly home appliances (e.g., baby bottle warmers) and export to global markets (EU, North America, Asia), meeting temperature controller safety standards.

Technical Specifications

Applications

This display is tailored for compact temperature controllers and space-constrained devices, including:

Temperature Controllers: Portable thermostats (room temp "22°C"), freezer monitors ("-18°C"), greenhouse temp sensors ("25°C"), or industrial equipment heat monitors ("80°C").

Home Appliances: Mini humidifiers (temp "24°C"), baby bottle warmers ("40°C"), travel-sized fridges ("5°C"), or electric kettles (heat temp "100°C").

Instrument Panels: Small industrial testers (component temp "60°C"), battery chargers (internal temp "35°C"), or fitness equipment (body temp "37°C").

Digital Indicators: Countertop weather stations (outdoor temp "-5°C"), smart home hubs (room temp "21°C"), or plant growth lights (ambient temp "28°C").

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Why Choose This Display for Temperature Controllers?

Space Efficiency: Ultra-small dimensions fit into compact controllers—enables multi-display setups (e.g., temp + humidity) without sacrificing readability.

Temp Readout Clarity: Red light + high contrast ensure accurate recognition of decimals/negatives—avoids errors in food storage or equipment safety.

Battery-Friendly: Low current use extends life for portable devices—critical for users relying on handheld temp monitors.

Easy Integration: Common anode polarity + dual mounting options simplify production and maintenance—works with standard ICs and PCBs.

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 ultra 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 (FedEx/DHL for urgent prototype orders), Air (medium-volume shipments), Ocean (bulk production runs for controller manufacturers).