BA9s T4W LED Bulb | 1895 64111 Indicator Light 6V to 240V

Name: BA9s T4W LED Bulb - Shatterproof PC Cover Miniature Bayonet Indicator Light 6V to 240V (Discrete Versions)
Brand: MIDCARS
SKU: T4W-4L

Product Overview: T4W-4L Miniature Bayonet BA9s LED Indicator Bulb

The MIDCARS T4W-4L is an industrial-grade miniature bayonet LED indicator bulb engineered with a robust shatterproof clear polycarbonate (PC) protective cover and 4 high-efficiency SMD 2835 LEDs. Designed to replace traditional incandescent T3-1/4, 1895, and 64111 miniature lamps, this bulb delivers stable, glare-free optical dispersion with exceptional resistance to continuous mechanical vibration, moisture, and thermal cycling.

Featuring our comprehensive discrete voltage range architecture (available in dedicated 6.3V, 12V, 24V, 30V, 36V, 48V, 60V, 75V, 100–130V, and 200–240V AC/DC configurations), the T4W-4L bridges the gap between automotive cabin/dashboard instrumentation and heavy-duty industrial automation switchgear, marine pilot panels, and aviation ground equipment.

Precision Engineering: Dimensional Blueprint & Socket Profile

Engineered to standard miniature bayonet dimensions (D10 × 28mm), ensuring 100% plug-and-play mechanical compatibility into standard BA9s sockets as well as optional offset-pin BAY9s and BAX9s fixtures:

T4W-4L BA9s LED bulb precision dimensional blueprint D10x28mm

Precision Dimensional Blueprint (D10 × L28mm)

BA9s 9mm Single-Contact Bayonet Socket Interface

Photometric Color Temperature & Emission Options

Available in factory-calibrated optical grades to meet diverse human-machine interface (HMI) signaling standards and vintage instrument cluster backlighting:

6500K Xenon White

4500K Natural White

3000K Warm White

Amber Yellow

Brilliant Red

Industrial & Automotive Equipment Cross-Reference

The T4W-4L serves as a direct drop-in replacement for both standard automotive miniature bayonet bulbs and specialized industrial machinery pilot lamps:

Automotive Instrument Clusters: Direct equivalent to European & American automotive standards including T4W, BA9, BA9s, 53, 57, 182, 257, 363, 756, 1445, 1815, 1891, 1892, 1893, 1895, 3893, and 64111.
Industrial Switchgear & Control Panels: Designed to replace legacy industrial incandescent pilot lamps including T3-1/4 miniature bayonet tubular lamps (10×28mm), Schneider/Telemecanique DL1-CE130 (130V), BT28 series switchgear signal indicators (BT28.024.083), and 6V–240V MBC indicator assemblies.
Marine, Rail & Heavy Equipment: Fully compatible with 24V marine navigation panels, 36V/48V/75V railway signaling consoles, and plant annunciator warning stacks.

Frequently Asked Questions

What is the primary operational advantage of the shatterproof clear PC cover over traditional glass bulbs?

Traditional miniature incandescent bulbs utilize fragile glass envelopes that easily shatter under mechanical impact or heavy vehicle vibration, risking filament breakage and electrical shorts. The MIDCARS T4W-4L features a thick, optical-grade clear polycarbonate (PC) enclosure that completely protects the internal SMD LEDs and circuitry against dust, moisture, and shock while maintaining over 92% optical transmittance.

How does the BA9s base differ from BAY9s and BAX9s, and which sockets are supported?

The standard BA9s socket features dual bayonet locating pins positioned symmetrically at 180° on a 9mm diameter base with a single bottom contact. For specialized European automotive applications, MIDCARS also manufactures this emitter platform with offset pin arrangements, including BAY9s (135° offset pins / H21W) and BAX9s (150° offset pins / H6W) upon customer specification.

Can this bulb operate on high industrial AC voltages like 130V or 230V without external resistors?

Yes. While standard automotive applications utilize 12VDC or 24VDC, our industrial series features integrated high-voltage rectification and discrete current-limiting architectures engineered for 100-130V AC/DC or 200-240V AC/DC operation. These versions plug directly into existing industrial pilot lights, control cabinets, and switchboards without requiring external dropping resistors or power supplies.

What is the factory B2B procurement policy, sample lead time, and packaging options?

For commercial validation, standard samples are available with an initial MOQ from 5 pairs. For volume OEM orders, custom blister cards, anti-static tray packing, and branded boxes are available starting from 5,000 units (pre-funded and drawn down across repeat purchase orders) with standard production lead times of 15–20 business days.

Product Model:	T4W-4L
Socket / Base:	BA9s (Miniature Bayonet 9mm; BAY9s / BAX9s Options on Request)
Operating Voltage:	Comprehensive Discrete Voltage Range: 6.3V, 12V, 24V, 30V, 36V, 48V, 60V, 75V, 100–130V, 200–240V AC/DC
Power Consumption:	0.6W – 1.0W
Luminous Flux:	50 – 90 Lumens
Color Temperature:	6500K Xenon White · 4500K Natural White · 3000K Warm White (Red, Amber, Green on Request)
LED Emitters:	4x High-Efficiency SMD 2835 LEDs (Ra ≥ 80, Dual-Face Optical Dispersion)
Enclosure / Body:	Impact-Resistant Shatterproof Clear Polycarbonate (PC) Cover
Bulb Dimensions:	Diameter 10mm × Overall Length 28mm (Standard T3-1/4 Tubular Envelope)
Quality & Warranty:	CE (EMC Compliant), RoHS · 2 Years Factory Warranty
Factory MOQ Policy:	Standard: from 5 pairs \| Custom Packaging: 5,000 pcs (pre-funded and drawn down across repeat orders)