Multicolour 3 Row 4 Digit 7 Segment LED Display 11mm common anode
for Electrical multimeter Panel
Product Overview
Light-Bo's Multicolor 3-Row 4-Digit 7-Segment LED Display is a
specialized numeric solution engineered for electrical multimeters
and instrument panels requiring simultaneous multi-parameter
readouts. Designed to prioritize clarity, space efficiency, and
functional color coding, this display excels at showing diverse
electrical metrics: voltage (e.g., "220V"), current (e.g., "0.8A"),
frequency (e.g., "50Hz"), or resistance (e.g., "100Ω")-all on
separate rows for instant distinction.
Its 11mm (0.43-inch) digit height ensures readability from 0.5-2
meters (typical distance for multimeter operation), while the
50×60×9mm form factor fits standard multimeter panels-no bulky
redesigns required. The yellow segments on a black surface boost
contrast with ultra bright multicolor light (white/red/yellow/pure
green, etc.), cutting through workshop glare or dim enclosures
without eye strain.
As a common cathode display, it integrates seamlessly with standard
multimeter driver ICs, supports automated assembly, and meets RoHS
compliance. Backed by low power use, long lifespan, and Light-Bo's
20,000 pcs/day production capacity, it delivers reliable
performance for high-volume multimeter manufacturing.
Main Image
Key Features (Electrical Multimeter-Optimized)
1. 3-Row 4-Digit Design for Multi-Parameter Readouts
Simultaneous Metric Display: 3 independent rows let multimeters show 3 critical parameters at
once (e.g., voltage, current, frequency) - eliminates manual mode
switching and speeds up electrical testing (e.g., troubleshooting
circuits).
Row-Specific Color Coding: Assign distinct colors to each row for intuitive recognition:
White: Voltage (e.g., "220V") - neutral, easy to track for primary
metrics.
Red: Current (e.g., "0.5A") - signals caution for high-current
readings.
Pure Green: Frequency (e.g., "50Hz") - indicates stable "normal" values.
4-Digit Precision: Each row supports 4 digits, enabling fine measurements (e.g.,
"0.025A" for low current, "12.50V" for precise voltage) - critical
for professional electrical testing.
2. Superior Visibility for Workshop Use
Ultra Bright Multicolor Illumination: High luminous intensity ensures clarity in harsh workshop
conditions (e.g., overhead lights, sunlight through windows) - no
squinting at small digits during field repairs or lab testing.
Yellow Segments on Black Surface: The yellow segment base enhances contrast with the black
background, eliminating "fuzzy" edges on digits (e.g.,
distinguishing "0" from "8" in low light) - avoids measurement
errors that could damage circuits.
Wide Viewing Angle: Uniform light distribution across segments ensures readability
from off-center positions (e.g., holding the multimeter at an angle
to a circuit) - ideal for hands-on electrical work.
3. Low Power & Reliable Performance
Low Power Requirement (5-10mA/LED): Extremely low current draw minimizes energy use, extending battery
life for portable multimeters (critical for field technicians
working away from power outlets).
Stable Operation in Electrical Environments: Withstands voltage fluctuations (-10°C to 60°C, typical for
workshops) and minor vibrations (e.g., carrying the multimeter in a
toolbox) - maintains brightness, no flickering during value
updates.
Long Lifespan (50,000+ Hours): High-quality LEDs match the 8-10 year service life of most
multimeters - reduces maintenance downtime (e.g., replacing a
display mid-test) and lowers replacement costs.
4. Easy Integration & High-Volume Manufacturing
Common Cathode Polarity: Works with standard multimeter driver ICs (e.g., TM1638, HT1621,
MAX7219) - simplifies circuit design for manufacturers and supports
existing multimeter firmware (e.g., sensor data processing, unit
labeling).
Easy Assembly: Compatible with PCB mounting and automated pick-and-place lines -
aligns with Light-Bo's 20,000 pcs/day production capacity, ensuring
fast delivery for high-volume multimeter orders.
RoHS Compliant: Free from lead, mercury, and harmful substances - safe for global
markets (EU, North America, Asia) and meets electrical equipment
safety standards (e.g., IEC for multimeters).
Detail Image
Technical Specifications
| Category | Parameter | Specification (Multimeter-Optimized) |
|---|
| Basic Design | Display Type | 3-Row 4-Digit 7-Segment LED Display (per row: 4 digits, supports
decimals/units) |
| | Polarity | Common Cathode |
| | Digit Height | 11mm (0.43 inch) |
| | Outer Dimensions (L*W*H) | 50 * 60 * 9mm |
| | Segment/Surface Finish | Yellow segments on Black Surface |
| Optical Performance | Core Emitting Colors | Ultra bright white, red, yellow, pure green |
| | Optional Colors | Ultra bright blue, yellow green, amber, orange |
| | Forward Voltage (VF) | 2.8-3.2V per LED (white/blue/green); 1.8-2.2V (red/amber/orange) |
| Electrical Parameters | Forward Current | 5-10mA per LED |
| | Power Consumption | Low (energy-efficient for portable multimeters) |
| Quality & Compliance | Core Advantages | High luminous intensity, stable performance, IC compatible, long
lifespan |
| | Compliance | RoHS Compliant |
Order & Logistics Information (Light-Bo)
| Logistics Detail | Specification |
|---|
| Brand Name | Light-Bo |
| Minimum Order Quantity (MOQ) | 1000 pieces |
| Trade Term | EXW (Ex Works, Guangdong, China) - flexible for buyer's shipping
arrangements |
| Production Capacity | 20,000 pieces per day - supports high-volume multimeter
manufacturing |
| Packing | EPE + Cartons - secure protection against transit damage |
| Delivery Time | 5-7 days for standard orders (white/red/yellow/green) |
| Transport Options | Ocean (bulk orders), Air (urgent shipments), Land (domestic/nearby
markets) |
| Origin | Guangdong, China (Mainland) |
Application Image
Applications
This display is purpose-built for electrical testing and instrument
panels, including:
Electrical Multimeters: Showing voltage (V), current (A), frequency (Hz), resistance (Ω)
on 3 separate rows.
Instrument Panels: Industrial power monitors (e.g., "380V" 3-phase voltage, "50Hz"
frequency, "10A" load current).
Home Appliance Testers: Checking appliance voltage ("220V"), power ("0.8kW"), and current
("3.6A").
Digital Indicators: Multi-parameter sensors (e.g., temperature + humidity + pressure
on separate rows).
Why Choose Light-Bo's 3-Row Display for Multimeters?
Multi-Parameter Efficiency: 3 rows eliminate mode switching, speeding up electrical testing
for technicians.
Intuitive Color Coding: Row-specific colors reduce metric confusion (e.g., red for current
= caution) - critical for safety.
High-Volume Support: 20,000 pcs/day capacity meets large multimeter manufacturer
demands, with fast 5-7 day delivery.
Battery-Friendly: Low power use extends portable multimeter life - ideal for
fieldwork.
Global Compliance: RoHS certification ensures export to key markets, aligning with
electrical equipment standards.
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 |
