Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

3G Electric
RFQ CartGet a QuoteSign inSign up
APPROVED VENDOR Incandescent Bulb: Incandescent, Miniature Bayonet (BA9s), (T) Tubular - BA9s Single-Contact Miniature Bayonet Base Lamps
APPROVED VENDORBA9s Single-Contact Miniature Bayonet Base Lamps

APPROVED VENDOR Incandescent Bulb: Incandescent, Miniature Bayonet (BA9s), (T) Tubular

The APPROVED VENDOR Incandescent Bulb is a BA9s single-contact miniature bayonet base lamp with a T3-1/4 tubular bulb shape. It operates at 28V AC and produces white light, identified by trade number 1820 and…

SKU 3G-OTH-385185

Brand
APPROVED VENDOR
Item
Incandescent Bulb: Incandescent, Miniature Bayonet
Category
BA9s Single-Contact Miniature Bayonet Base Lamps
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineer
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Technical Specifications

APPROVED VENDOR
Manufacturer Part Number
21U629
Type
Miniature Bayonet (BA9s), (T) Tubular, T3-1/4, 1820
Voltage
28V AC
Bulb Shape
T3-1/4
Light Color
White
Trade Number
1820
View Full Spec Sheet

Technical Documents

No technical documents available for this product.
Request documentation →
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

APPROVED VENDOR Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The APPROVED VENDOR Incandescent Bulb is a BA9s single-contact miniature bayonet base lamp with a T3-1/4 tubular bulb shape. It operates at 28V AC and produces white light, identified by trade number 1820 and manufacturer part number 21U629.

Frequently Asked Questions

What is the APPROVED VENDOR 21U629 incandescent bulb used for?

The APPROVED VENDOR 21U629 incandescent bulb is used as a replacement lamp in industrial indicator lights, panel meters, and control systems that require a BA9s miniature bayonet base. Its 28V AC rating and T3-1/4 tubular shape make it suitable for signaling and illumination in machinery and equipment.

What are the specifications of the APPROVED VENDOR 1820 bulb?

The APPROVED VENDOR 1820 bulb is a BA9s single-contact miniature bayonet base lamp with a T3-1/4 tubular shape. It operates at 28V AC, produces white light, and carries trade number 1820 with manufacturer part number 21U629. It is an incandescent type for general industrial use.

Where to buy APPROVED VENDOR 21U629 bulbs worldwide?

You can source the APPROVED VENDOR 21U629 bulb through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time; we provide reliable sourcing for this BA9s lamp.

How to select the correct BA9s incandescent bulb for replacement?

To select the correct BA9s incandescent bulb, match the base type (BA9s single-contact miniature bayonet), voltage (28V AC), bulb shape (T3-1/4 tubular), and trade number (1820). The APPROVED VENDOR 21U629 meets these specs. Always verify the original lamp's markings before ordering to ensure compatibility.

Used in

Common applications for APPROVED VENDOR
Laboratory sampling — APPROVED VENDOR clear wide mouth glass bottles for collecting and storing liquid samples in non-sterile environments.
Steam heating maintenance — APPROVED VENDOR forged brass radiator valves for regulating steam flow in commercial building heating systems.
High-pressure cleaning — APPROVED VENDOR turbo spray nozzles for pressure washers used in industrial equipment cleaning up to 6,000 psi.
Cleanroom operations — APPROVED VENDOR vinyl task chairs for seating in ISO 5 classified manufacturing or assembly areas.
General sealing — APPROVED VENDOR natural rubber stoppers for closing laboratory flasks or test tubes in educational or research settings.
Tamper-evident security — APPROVED VENDOR brass lead and wire seals for securing utility meters, cargo containers, or access panels.

APPROVED VENDOR Products

3G Electric supplies APPROVED VENDOR ba9s single-contact miniature bayonet base lamps. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion →Pumps & Compressors →Spare Parts →All Products →

Similar products

Matched by specification & description
APPROVED VENDOR Incandescent Bulb: Incandescent, Miniature Bayonet (BA9s), (T) Tubular, T3-1/4, 1828 (MPN 1828-1PK). Key specifications — Light Color: White; Trade Number: 1828; Voltage: 37.5V AC; Brand: APPROVED VENDOR; Bulb Shape: T3-1/4.
APPROVED VENDOR
APPROVED VENDOR Incandescent Bulb: Incandescent, Miniature Bayonet (BA9s), (T) Tubular, T3-1/4, 1828 (MPN 1828-1PK). Key specifications — Light Color: White; Trade Number: 1828; Voltage: 37.5V AC; Brand: APPROVED VENDOR; Bulb Shape: T3-1/4.
APPROVED VENDOR Incandescent Bulb: Incandescent, Miniature Bayonet (BA9s), (T) Tubular, T3-1/4, 1822 (MPN 1822-1PK). Key specifications — Light Color: White; Trade Number: 1822; Voltage: 36V AC; Brand: APPROVED VENDOR; Bulb Shape: T3-1/4.
APPROVED VENDOR
APPROVED VENDOR Incandescent Bulb: Incandescent, Miniature Bayonet (BA9s), (T) Tubular, T3-1/4, 1822 (MPN 1822-1PK). Key specifications — Light Color: White; Trade Number: 1822; Voltage: 36V AC; Brand: APPROVED VENDOR; Bulb Shape: T3-1/4.
APPROVED VENDOR Incandescent Bulb: Incandescent, Miniature Bayonet (BA9s), (T) Tubular, T3-1/4, 1892 (MPN 21U637). Key specifications — Light Color: White; Trade Number: 1892; Voltage: 14.4V AC; Brand: APPROVED VENDOR; Bulb Shape: T3-1/4.
APPROVED VENDOR
APPROVED VENDOR Incandescent Bulb: Incandescent, Miniature Bayonet (BA9s), (T) Tubular, T3-1/4, 1892 (MPN 21U637). Key specifications — Light Color: White; Trade Number: 1892; Voltage: 14.4V AC; Brand: APPROVED VENDOR; Bulb Shape: T3-1/4.
APPROVED VENDOR Incandescent Bulb: Incandescent, Miniature Bayonet (BA9s), (T) Tubular, T3-1/4, 1816 (MPN 21U626). Key specifications — Light Color: White; Trade Number: 1816; Voltage: 13V AC; Brand: APPROVED VENDOR; Bulb Shape: T3-1/4.
APPROVED VENDOR
APPROVED VENDOR Incandescent Bulb: Incandescent, Miniature Bayonet (BA9s), (T) Tubular, T3-1/4, 1816 (MPN 21U626). Key specifications — Light Color: White; Trade Number: 1816; Voltage: 13V AC; Brand: APPROVED VENDOR; Bulb Shape: T3-1/4.
APPROVED VENDOR Incandescent Bulb: Incandescent, Miniature Bayonet (BA9s), (T) Tubular, T3-1/4, 1835 (MPN 1835-1PK). Key specifications — Light Color: White; Trade Number: 1835; Voltage: 55V AC; Brand: APPROVED VENDOR; Bulb Shape: T3-1/4.
APPROVED VENDOR
APPROVED VENDOR Incandescent Bulb: Incandescent, Miniature Bayonet (BA9s), (T) Tubular, T3-1/4, 1835 (MPN 1835-1PK). Key specifications — Light Color: White; Trade Number: 1835; Voltage: 55V AC; Brand: APPROVED VENDOR; Bulb Shape: T3-1/4.
APPROVED VENDOR Incandescent Bulb: Incandescent, Miniature Bayonet (BA9s), (T) Tubular, T3-1/4, 1864 (MPN 1864-1PK). Key specifications — Light Color: White; Trade Number: 1864; Voltage: 28V AC; Brand: APPROVED VENDOR; Bulb Shape: T3-1/4.
APPROVED VENDOR
APPROVED VENDOR Incandescent Bulb: Incandescent, Miniature Bayonet (BA9s), (T) Tubular, T3-1/4, 1864 (MPN 1864-1PK). Key specifications — Light Color: White; Trade Number: 1864; Voltage: 28V AC; Brand: APPROVED VENDOR; Bulb Shape: T3-1/4.

More from APPROVED VENDOR

View all APPROVED VENDOR parts →
APPROVED VENDOR Incandescent Bulb: Incandescent, Miniature Bayonet (BA9s), (G) Globe, G4-1/2, 57 (MPN 57-1PK). Key specifications — Light Color: White; Trade Number: 57; Voltage: 14V AC; Brand: APPROVED VENDOR; Bulb Shape: G4-1/2.
APPROVED VENDOR
APPROVED VENDOR Incandescent Bulb: Incandescent, Miniature Bayonet (BA9s), (G) Globe, G4-1/2, 57 (MPN 57-1PK). Key specifications — Light Color: White; Trade Number: 57; Voltage: 14V AC; Brand: APPROVED VENDOR; Bulb Shape: G4-1/2.
APPROVED VENDOR Compact LED Bulb: LED, Miniature Bayonet (BA9s), (T) Tubular, T3-1/4, 24V AC/DC (MPN L24V-MB-A). Key specifications — Light Color: Amber; Voltage: 24V AC/DC; Brand: APPROVED VENDOR; Bulb Shape: T3-1/4.
APPROVED VENDOR
APPROVED VENDOR Compact LED Bulb: LED, Miniature Bayonet (BA9s), (T) Tubular, T3-1/4, 24V AC/DC (MPN L24V-MB-A). Key specifications — Light Color: Amber; Voltage: 24V AC/DC; Brand: APPROVED VENDOR; Bulb Shape: T3-1/4.
APPROVED VENDOR Compact LED Bulb: LED, Miniature Bayonet (BA9s), (T) Tubular, T3-1/4, 12V DC, White (MPN LM1012MB-WW). Key specifications — Light Color: White; Trade Number: 53, 57, 182, 293, 756, 1445, 1488, 1815, 1816, 1889, 1891, 1893, 1895; Voltage: 12V DC; Brand: APPROVED VENDOR; Bulb Shape: T3-1/4.
APPROVED VENDOR
APPROVED VENDOR Compact LED Bulb: LED, Miniature Bayonet (BA9s), (T) Tubular, T3-1/4, 12V DC, White (MPN LM1012MB-WW). Key specifications — Light Color: White; Trade Number: 53, 57, 182, 293, 756, 1445, 1488, 1815, 1816, 1889, 1891, 1893, 1895; Voltage: 12V DC; Brand: APPROVED VENDOR; Bulb Shape: T3-1/4.
APPROVED VENDOR Compact LED Bulb: LED, Miniature Bayonet (BA9s), (T) Tubular, T3-1/4, 160V AC, White (MPN LM10160MB-WW). Key specifications — Light Color: White; Voltage: 160V AC; Brand: APPROVED VENDOR; Bulb Shape: T3-1/4.
APPROVED VENDOR
APPROVED VENDOR Compact LED Bulb: LED, Miniature Bayonet (BA9s), (T) Tubular, T3-1/4, 160V AC, White (MPN LM10160MB-WW). Key specifications — Light Color: White; Voltage: 160V AC; Brand: APPROVED VENDOR; Bulb Shape: T3-1/4.
APPROVED VENDOR Incandescent Bulb: Incandescent, Miniature Bayonet (BA9s), (T) Tubular, T3-1/4, 44 (MPN 21U517). Key specifications — Light Color: White; Trade Number: 44; Voltage: 6.3V AC; Brand: APPROVED VENDOR; Bulb Shape: T3-1/4.
APPROVED VENDOR
APPROVED VENDOR Incandescent Bulb: Incandescent, Miniature Bayonet (BA9s), (T) Tubular, T3-1/4, 44 (MPN 21U517). Key specifications — Light Color: White; Trade Number: 44; Voltage: 6.3V AC; Brand: APPROVED VENDOR; Bulb Shape: T3-1/4.
APPROVED VENDOR Compact LED Bulb: LED, Miniature Bayonet (BA9s), (T) Tubular, T3-1/4, 6.3V DC, Amber (MPN LM1006MB-A). Key specifications — Light Color: Amber; Trade Number: 51,55,44,47,239,755,1406,1847,1850,1866,1810,1888; Voltage: 6.3V DC; Brand: APPROVED VENDOR; Bulb Shape: T3-1/4.
APPROVED VENDOR
APPROVED VENDOR Compact LED Bulb: LED, Miniature Bayonet (BA9s), (T) Tubular, T3-1/4, 6.3V DC, Amber (MPN LM1006MB-A). Key specifications — Light Color: Amber; Trade Number: 51,55,44,47,239,755,1406,1847,1850,1866,1810,1888; Voltage: 6.3V DC; Brand: APPROVED VENDOR; Bulb Shape: T3-1/4.
APPROVED VENDOR Compact LED Bulb: LED, Miniature Bayonet (BA9s), (T) Tubular, T3-1/4, 6V AC/DC (MPN L1006MB-WW). Key specifications — Light Color: White; Trade Number: 51,55,44,47,239,755,1406,1847,1850,1866,1810,1888; Voltage: 6V AC/DC; Brand: APPROVED VENDOR; Bulb Shape: T3-1/4.
APPROVED VENDOR
APPROVED VENDOR Compact LED Bulb: LED, Miniature Bayonet (BA9s), (T) Tubular, T3-1/4, 6V AC/DC (MPN L1006MB-WW). Key specifications — Light Color: White; Trade Number: 51,55,44,47,239,755,1406,1847,1850,1866,1810,1888; Voltage: 6V AC/DC; Brand: APPROVED VENDOR; Bulb Shape: T3-1/4.
APPROVED VENDOR Incandescent Bulb: Incandescent, Miniature Bayonet (BA9s), (T) Tubular, T3-1/4, 1819 (MPN 1819-1PK). Key specifications — Light Color: White; Trade Number: 1819; Voltage: 28V AC; Brand: APPROVED VENDOR; Bulb Shape: T3-1/4.
APPROVED VENDOR
APPROVED VENDOR Incandescent Bulb: Incandescent, Miniature Bayonet (BA9s), (T) Tubular, T3-1/4, 1819 (MPN 1819-1PK). Key specifications — Light Color: White; Trade Number: 1819; Voltage: 28V AC; Brand: APPROVED VENDOR; Bulb Shape: T3-1/4.