Home > Products > Miniature & Indicator LED Bulbs > Ultra-Short BA9s T4W LED Bulb - 23mm Indicator Light E10
Ultra-Short BA9s T4W LED Bulb - 23mm Low-Profile Pushbutton Indicator Light
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MIDCARS ultra-short 23mm BA9s T4W miniature bayonet LED indicator bulb with PC lens
Ultra-compact 23mm T4W BA9s LED bulb showing dual-face SMD 2835 emitter arrangement
Side profile view of 23mm low-profile BA9s LED bulb with rugged protective PC enclosure
Close-up of nickel-plated brass BA9s miniature bayonet base and single bottom contact
Pair of 23mm BA9s T4W LED indicator bulbs demonstrating compact form factor
Engineering blueprint of ultra-short 23mm BA9s and E10 miniature LED bulbs
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Cross Reference / Direct Replacement
T2W / T3W / T4W (Ultra-Short 23mm Variant)
577-471 (24V 2W T2-7/8 Miniature Base)
4101344 (60V 1.2W 23mm Industrial Pilot)
LB241C28R (24-28V Short Pilot)
755 / 47 / 1847 (6.3V Pinball, Vintage Audio & Low-Voltage Pilot)
53 / 57 / 1895 / 1891 / 1893 (Instrument & Dash)
Optional: E10 Miniature Screw Base

Ultra-Short BA9s T4W LED Bulb - 23mm Low-Profile Pushbutton Indicator Light

Ultra-compact 23mm low-profile BA9s miniature bayonet LED bulb engineered with dual-face SMD 2835 LEDs and a protective PC lens. Specially designed for shallow pushbutton switches, industrial consoles, and tight gauges. Replaces T2W & T4W.
Product Model T4W-2LNC
Socket / Base BA9s (Miniature Bayonet, 9mm Base)
Optional E10 miniature screw base available
Bulb Dimensions Outer Diameter 10.0mm × Overall Length 23.0mm
Operating Voltage Discrete Voltage Versions (each bulb rated for one voltage):
3.7V / 6.3V / 12V / 24V / 28V / 36V / 48V / 60V DC · 100-130V AC · 200-240V AC
Power Rating 0.3W - 1.0W (Low-Power Energy-Saving Circuit)
Luminous Flux 30 - 90 Lumens (Calibrated for Signal Clarity)
Color Output Pure White 6500K | Warm White 3000K
Amber (586-595nm) | Red (620-625nm) | Green (520-525nm) | Blue (465-470nm)
LED Emitters 2x High-Efficiency SMD 2835 LEDs (Dual-Face Radial Layout)
Enclosure / Lens Protective Polycarbonate (PC) Lens
Lifespan Rating > 50,000 Operating Hours (L70 Standard)
Certification & Warranty CE (EMC Compliant), RoHS | 2-Year Factory Warranty
Factory MOQ 5 pairs standard; 2500 pairs OEM custom packaging
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  • Product Details

Overview: Ultra-Short 23mm Miniature Bayonet Pilot Lamp

In compact industrial control boxes, illuminated emergency stop switches, avionics consoles, and shallow instrument gauges, standard 28mm BA9s bulbs often experience severe clearance limitations. The MIDCARS T4W-2LNC is purpose-built to solve this physical interference. Engineered with an ultra-short 23.0mm overall length and a slim 10.0mm diameter, it drops effortlessly into space-constrained pushbutton switches and shallow reflector cavities.

Featuring two high-performance SMD 2835 LED emitters arranged in a dual-face configuration and capped by a tough polycarbonate (PC) protective lens, the T4W-2LNC delivers smooth 360-degree radial illumination across an extensive discrete voltage selection from 3.7V battery circuits up to 240V AC industrial power lines.

Engineering Specifications & Multi-Base Architecture

Below are the detailed engineering blueprints, color dispersion options, and factory export packaging standards for the T4W-2LNC series. Both BA9s bayonet and E10 miniature screw bases share the identical ultra-compact 23mm profile:

Multi-color LED output options for ultra-short 23mm BA9s indicator bulb
Color Output Options
Engineering blueprint of ultra-short 23mm BA9s miniature bayonet LED bulb
BA9s Base (D10 × L23mm)
Engineering blueprint of ultra-short 23mm E10 miniature screw base LED bulb
E10 Base (D10 × L23mm)
Industrial moisture-barrier export packaging for 23mm miniature LED bulbs
100 Pcs / Box

Key Performance Advantages

Ultra-Short 23mm Form Factor for Shallow Enclosures

With an engineered total length of only 23.0mm, the T4W-2LNC eliminates lamp-head collision against push-button caps, colored diffusers, and shallow switchgear lenses. It is the ideal retrofit solution where standard 28mm T4W lamps are too long to seat properly.

Comprehensive Discrete Voltage Range

Each unit is precision-calibrated for its designated operating voltage, preventing internal thermal overload. Available ratings include low-voltage DC (3.7V, 6.3V, 12V, 24V, 36V, 48V, 60V) as well as commercial high-voltage mains (100-130V AC and 200-240V AC). Custom voltage specifications are fully supported for OEM industrial orders.

Multi-Industry Signal Compatibility

From industrial pushbuttons and control station tower lights to pinball game boards (replaces trade numbers 755 & 47) and vintage stereo audio dial indicators, this miniature bayonet bulb provides flicker-free, instant-on illumination with minimal current draw.

Industrial & OEM Applications

  • Industrial Control Panels: 16mm / 22mm illuminated pushbutton switches, selector switches, and pilot signal towers.
  • Factory Automation: Machine tool status lights, PLC indicator boards, and switchgear consoles.
  • Amusement & Audio: 6.3V pinball playfield illumination, vintage Hi-Fi receiver VU meters, and synthesizer backlights.
  • Automotive & Transportation: Compact motorcycle instrument clusters, dashboard warning lights, and marine switch panels.

Frequently Asked Questions

What is the primary difference between the T4W-2LNC (23mm) and standard T4W (28mm) bulbs?
The T4W-2LNC features an ultra-short 23.0mm overall body length, which is 5.0mm shorter than standard 28.0mm T4W/BA9s bulbs. This ultra-compact profile prevents the bulb lens from making physical contact with shallow switch caps, pushbutton covers, or compact gauge lenses.
Can this bulb be ordered with an E10 miniature screw base instead of BA9s?
Yes. While the standard production model comes with a nickel-plated brass BA9s miniature bayonet base, we also supply the identical optical assembly fitted with an E10 miniature Edison screw base upon request.
Are custom operating voltages available for specialized machinery?
Yes. In addition to our standard stocked discrete voltages (6.3V, 12V, 24V DC, and 100-130V AC · 200-240V AC), our factory can manufacture tailored voltage versions ranging from 3.7V DC to 60V DC and various AC mains voltages to match your specific equipment specifications.
What is the minimum order quantity for OEM custom packaging?
Standard stock configurations are supported from 5 pairs for sampling and small trials. Full custom OEM packaging, including branded blister cards or multi-pack industrial trays, has an MOQ of 2500 pairs.