Multicolour 3 Row 4 Digit LED Display for Electrical Multimeters

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.

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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).

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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)

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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

• 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 (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 !