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Pure Green 4 Digit 7 Segment LED Clock Display common cathode for mini oven timer
Product Overview
This 0.42-inch (10.67mm) 4-digit common cathode 7-segment LED display is a mini oven timer-optimized solution, engineered for clear, reliable countdown readouts in compact kitchen appliance enclosures. Featuring vivid pure green illumination (515–525nm wavelength, 100–140mcd luminous intensity) and a high-contrast white-segment-on-black-surface design with protective film, it delivers glare-free visibility even in bright kitchen environments or dim countertop settings.
With its 39×25×9.3mm space-saving footprint, the display fits seamlessly into mini oven, microwave, and gas cooker control panel PCBs. The common cathode polarity ensures compatibility with mainstream driver ICs (e.g., TM1637, MAX7219), while its low power consumption, extremely low current operation, and uniform segment luminosity make it ideal for 24/7 intermittent timer use. Multi-color emission options further support functional coding for diverse kitchen appliance scenarios, and the protective surface film shields against grease and steam corrosion.
Core Technical Specifications
| Category | Parameter | Specification (Mini Oven Timer-Optimized) |
| Basic Design | Display Type | 4-Digit 7-Segment LED Clock Display |
| Digit Height | 10.67mm (0.42 inch) | |
| Outer Dimensions (L×W×H) | 39 × 25 × 9.3mm | |
| Segment/Surface Finish | White Segments on Black Surface with Protective Film | |
| Polarity | Common Cathode | |
| Optical Performance | Primary Emitting Color | Pure Green |
| Wavelength Range | 515–525nm | |
| Luminous Intensity | 100–140 mcd/LED | |
| Core Optical Traits | High-luminous intensity output, luminous evenly distributed on each segment | |
| Optional Emitting Colors | Various colors available (red, blue, amber, white, etc.) | |
| Electrical Parameters | Forward Voltage (VF) | 2.8–3.2V/LED |
| Recommended Forward Current | 5–10mA/LED | |
| Power Traits | High-efficiency, low-power consumption, extremely low-current | |
| Quality & Compliance | Core Advantages | Stable performance, long lifespan (50,000+ hours), easy assembly, IC compatible |
| Certification | RoHS Compliant (default, can be upgraded to REACH on request) |
Product Image
Key Features (Mini Oven Timer-Optimized)
1. Kitchen-Environment Resilience & Protection
Protective Surface Film: Shields the black surface and white segments from kitchen grease splatters, steam condensation, and cleaning agent corrosion—maintaining clear readability and sleek appearance throughout the mini oven's 8–10 year service life. No need for frequent cleaning or display replacement due to contamination.
Compact 39×25×9.3mm Size: Fits into the tight PCB layouts of mini ovens, countertop microwaves, and small gas cookers—no custom control panel redesign required for manufacturers, supporting high-volume automated production.
2. Eye-Friendly High-Contrast Readability
Pure Green Illumination (515–525nm): The green light spectrum is less harsh on the eyes than red or blue, making it ideal for long-term kitchen timer monitoring (e.g., slow baking or roasting cycles). It cuts through ambient kitchen light glare without causing fatigue, ensuring users can check remaining time at a glance.
Uniform Segment Luminosity: ≤5% brightness variation across all segments eliminates dim or over-bright digits, avoiding misreads of critical short countdowns (e.g., 00:05 final minutes of baking) that impact cooking results.
100–140mcd Balanced Brightness: Delivers clear visibility from 1–2 meters, perfect for countertop appliances—no need to lean over hot cooktops to read timer values.
3. Energy Efficiency for Low-Power Appliance Operation
Extremely Low-Current Operation (5–10mA/LED): Minimizes energy draw for mini oven timer systems that run intermittently during cooking cycles, aligning with home appliance energy-saving standards and reducing household electricity bills. For battery-powered portable ovens, it extends runtime by 30% compared to standard high-current displays.
High-Efficiency Performance: Converts electrical energy into light with minimal heat loss, avoiding overheating in the sealed mini oven control panel enclosure—critical for preventing display damage during prolonged baking cycles.
4. Manufacturer-Friendly Easy Integration
Common Cathode IC Compatibility: Works seamlessly with mainstream timer driver ICs and microcontrollers widely used in kitchen appliance control systems. Simplifies circuit design for countdown functions, time adjustment, end-of-cycle buzzer activation, and brightness tuning for day/night use.
Standardized Assembly Design: Supports through-hole or SMT pinout configurations, compatible with automated SMT production lines—reducing labor costs and assembly errors for mini oven manufacturers.
Multi-Color Versatility: Optional emitting colors enable functional coding for different cooking modes:
Red: High-visibility for fast preheat timer countdowns and overheat alerts
Amber: Warm tones for slow roasting and baking cycles
White: Modern aesthetics for premium smart mini oven models
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 .
Light Bo 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 customized 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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