Panel Indicators, Pilot Lights

Part Number	Description / PDF	Quantity
DX0505/BL/24 Bulgin	VANDAL RESISTANT LED PMI BLUE	21
LE2870C5A Bulgin	LED PNL MNT 125/250V AMBER	104
DX1091/YL Bulgin	LED PANEL INDICATOR YLW 2.1V	0
LE2951WL5A Bulgin	LED PNL MNT 125/250V AMBER	82
DX0505/RD/00 Bulgin	VANDAL RESISTANT LED PMI RED	78
LE2950WL5R Bulgin	LED PNL MNT 125/250V RED	0
A104700AAA Bulgin	HOLD PNL MNT LAMP CHROME	1404
LH1050B Bulgin	HLDR INDICATOR PNL BLK T1 3/4	6233
NL589C2R Bulgin	LAMP NEON PNL MNT 125V RED	24
NL2950WL2A Bulgin	LAMP NEON PNL MNT 125V AMBER	15
NL67WL2G Bulgin	INDICATOR LIGHT NEON 110V GREEN	0
C058900NAA Bulgin	LAMP PNL MNT	1782
NL589C2A Bulgin	LAMP NEON PNL MNT 125V AMBER	879
DX1093/RD Bulgin	LED PANEL INDICATOR RED 2V	0
NL589C2G Bulgin	LAMP NEON PNL MNT 125V GREEN	593
LE2950WL5G Bulgin	LED PNL MNT 125/250V GREEN	465
DX1119/GN Bulgin	LED PANEL INDICATOR GREEN 2.1V	796
LH1050BS Bulgin	HLDR INDICATOR PNL BLK T1 3/4	220
LE2870C5G Bulgin	LED PNL MNT 125/250V GREEN	110
LE67C5G Bulgin	LED PNL MNT 125/250V GREEN	964

Panel Indicators, Pilot Lights

1. Overview

Panel indicators and pilot lights are optoelectronic devices that provide visual status feedback in electrical and electronic systems. These components convert electrical signals into light outputs, enabling operators to monitor equipment conditions at a glance. Their importance spans across industrial automation, consumer electronics, transportation, and medical devices, where reliable visual indication ensures operational safety, efficiency, and user interaction.

2. Major Types and Functional Classification

Type	Functional Features	Application Examples
LED Panel Indicators	Low power consumption, long lifespan, instant response	Industrial control panels, HVAC systems
Lamp-based Pilot Lights	High brightness, compatibility with AC/DC circuits	Machinery status indication, heavy-duty equipment
Combined Indicator/Switch	Integrated illumination with manual control	Emergency stop circuits, control desks
Multi-color Indicators	Programmable color outputs for status differentiation	Network routers, medical diagnostic equipment
Remote Indicators	Separate light source and panel module	Automotive dashboards, aerospace control systems

3. Structure and Components

Typical construction includes:

Light Source: LED chips or filament bulbs with specific color/wavelength
Housing: Thermoplastic or metal body with mounting threads (e.g., M20, NPT)
Optical System: Diffused or focused lens for uniform light distribution
Electrical Interface: Screw terminals, PCB pins, or quick-connect terminals
Sealing Elements: Rubber gaskets for IP65+ protection ratings

4. Key Technical Specifications

Parameter	Significance
Operating Voltage Range	Determines compatibility with control circuits (3-480V AC/DC)
Luminous Intensity (cd)	Affects visibility in different lighting conditions
Color Wavelength (nm)	Standardizes visual coding (e.g., 630nm red for warnings)
MTBF (Hours)	Indicates reliability (LED: 50,000-100,000 hours)
IP Rating	Defines environmental protection level
Response Time (ms)	Critical for real-time status monitoring

5. Application Areas

Industrial: CNC machines, PLC control cabinets, factory automation
Transportation: Locomotive control panels, aircraft avionics
Medical: Patient monitors, imaging equipment status indicators
Consumer: Home appliance power indicators, audio equipment
Energy: Solar inverters, smart grid monitoring systems

6. Leading Manufacturers and Products

Manufacturer	Representative Product	Key Features
Phoenix Contact	ILLINOX series	Modular design, IP69K rating
Omron	XLDC12E-4AH	Ultra-compact LED indicator with 100,000-hour lifespan
Siemens	8WA1000 series	Multi-voltage capability (24-415V AC/DC)
Eaton	Pilot Lights H45K	Shock-resistant filament lamps for heavy-duty use
TE Connectivity	CapLED	Capacitive touch-enabled indicator

7. Selection Recommendations

Key considerations:

Environmental factors: Temperature range (-40 C to +85 C), vibration levels
Electrical compatibility: Voltage matching and circuit type (AC/DC)
Visibility requirements: Ambient light conditions and viewing distance
Certification needs: UL, CE, RoHS compliance for regulatory environments
Mechanical specifications: Panel cutout size (commonly 16/22/30mm)

Example: Selecting an IP67-rated LED indicator with 24V DC operation for a food processing plant's washdown area.

Industry Trends

Emerging developments include:

Integration with IoT systems for smart status monitoring
Miniaturization for high-density panel designs
RGB-LED technology for dynamic color coding
Energy harvesting indicators for self-powered operation
Enhanced durability coatings for extreme environments