Compact BA9s T4W LED Bulb: Ultra-Short 25mm Engineered for Tight-Space Instrumentation
In high-density industrial control panels, aviation instrument clusters, telecommunication signal units, and vintage automotive gauge housings, standard 28mm to 30mm miniature bayonet bulbs frequently cause physical interference with front lenses, shallow reflectors, or adjacent wiring harnesses. The MIDCARS T4W-2LCF solves this critical packaging challenge by delivering an ultra-short overall length of only 23.0mm to 25.0mm with an outer diameter of 10.0mm, providing seamless drop-in fitment into space-constrained sockets without compromising optical visibility.
Featuring a dual-face optical array powered by two high-efficiency SMD 2835 LEDs, the bulb emits a wide 360-degree radial beam through an impact-resistant clear polycarbonate lens (with frosted anti-glare lens available). Operating at an ultra-low power consumption of 0.3W to 0.7W, it runs significantly cooler than incandescent filaments, permanently eliminating thermal degradation of colored plastic indicator caps and acrylic gauge lenses.
Ultra-Short 25mm Compact Housing with Dual-Face SMD 2835 Optical Placement (Click to enlarge)
Precision Dimensional Specifications & Electrical Parameters
Every batch of T4W-2LCF indicator bulbs undergoes 100% automated electrical characterization and dimensional gauging at our Dongguan manufacturing facility to guarantee strict mechanical compliance with international miniature bayonet standards:
| Specification Parameter | Engineering Data & Standards |
|---|---|
| Bulb Form Factor | T2-7/8 / T3-1/4 Compact Miniature Tubular (D 10mm x L 23-25mm) |
| Base Type | BA9s (IEC 7004-14, 9mm Miniature Bayonet, Single Base Contact) |
| Voltage Options (DC) | 3.7V, 6.3V, 12V, 24V, 36V, 48V, 60V DC Discrete Driver Architectures |
| Voltage Options (AC) | 100-130V AC / 200-240V AC Integrated Bridge Circuit (Custom Available) |
| Power Consumption | 0.3W - 0.7W (85%+ Energy Reduction vs 2W-4W Incandescent Filaments) |
| Luminous Output | 30 - 70 Lumens (Optimized for Day/Night Legibility without Glare) |
| Optics & Enclosure | Clear Impact-Resistant Polycarbonate Lens (Optional Frosted Diffuser) |
| Operating Temperature | -40°C to +85°C (-40°F to +185°F) Industrial Operating Range |
| Lifespan Rating | > 50,000 Operating Hours (L70 Standard) |
Compact Dimensional Blueprint (10mm Diameter x 25mm Length) (Click to enlarge)
Application Scenarios Across Industrial & Automotive Environments
Due to its miniature form factor, comprehensive discrete voltage range, and solid-state vibration resistance, the T4W-2LCF serves a broad range of mission-critical signaling applications:
- Industrial Automation & Switchgear: 22mm / 16mm pushbutton pilot lights, alarm annunciators, control console indicators, and water treatment / power plant monitoring boards (replaces 24V, 30V CEMA, and 60V incandescent bulbs).
- Electrical Power Distribution: Low-voltage and medium-voltage switch cabinets, relay status indicators, and emergency power supply control units.
- Automotive & Commercial Vehicles: Gauge backlighting, turn signal dash telltales, gear shift indicators, clock illumination, and motorcycle dash pods requiring compact 23-25mm clearance.
- Marine & Avionics Consoles: Marine helm switch backlighting and aircraft status panels requiring reliable DC illumination without filament burnout under severe mechanical vibration.
Optical Advantages: Clear Lens vs. Frosted Lens Configuration
To satisfy divergent optical requirements across different indicator housings, MIDCARS offers dual optical enclosure choices:
- Clear Polycarbonate Lens: Maximizes raw lumen transmission and punchy, high-contrast point-source illumination—ideal for colored jewel lenses, daytime-visible industrial pilot beacons, and concentrated warning lights.
- Frosted Polycarbonate Lens: Provides smooth, 100% uniform light dispersion without hotspot glare—ideal for directly visible instrument cluster dials, diffused backlit iconography, and luxury gauge illumination.
B2B Procurement, OEM Customization & Factory Supply
As a direct LED bulb manufacturing plant established in 2016 in Dongguan, China, MIDCARS supports automotive aftermarket brands, electrical panel builders, and regional distributors worldwide:
- Flexible Minimum Order Quantity (MOQ): Standard stock configurations supported from 5 pairs; full custom packaging MOQ starts at 2,500 pairs.
- Custom Electrical & Optical Engineering: Tailored voltage circuits (e.g., custom 36V/48V/60V/110V/230V DC/AC), bi-polar circuitry, custom emitter binning (CCT 3000K/4500K/6500K, or pure Red/Amber/Green/Blue wavelengths).
- Packaging & Private Labeling: Industrial ESD bulk blister packaging, OEM retail hanging cards, custom barcode labeling, and laser-etched model identification on bayonet collars.