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, Double Contact Bayonet (BA15d), (S) Sign - BA15d Double-Contact Bayonet Base Lamps
APPROVED VENDORBA15d Double-Contact Bayonet Base Lamps

APPROVED VENDOR Incandescent Bulb: Incandescent, Double Contact Bayonet (BA15d), (S) Sign

The APPROVED VENDOR Incandescent Bulb is a BA15d Double-Contact Bayonet Base Lamp with an S11 bulb shape. It operates at 28V AC and produces white light, with a Trade Number of 312 and Manufacturer Part Number 312-10PK.

SKU 3G-OTH-388503

Brand
APPROVED VENDOR
Item
Incandescent Bulb: Incandescent, Double Contact Bayonet
Category
BA15d Double-Contact 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
312-10PK
Type
Double Contact Bayonet (BA15d), (S) Sign, S11, 312
Voltage
28V AC
Bulb Shape
S11
Light Color
White
Trade Number
312
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 BA15d Double-Contact Bayonet Base Lamp with an S11 bulb shape. It operates at 28V AC and produces white light, with a Trade Number of 312 and Manufacturer Part Number 312-10PK.

Frequently Asked Questions

What is the APPROVED VENDOR 312 incandescent bulb used for?

The APPROVED VENDOR 312 incandescent bulb is used for sign lighting and indicator applications requiring a compact S11 shape. Its BA15d double-contact bayonet base ensures secure installation in fixtures rated for 28V AC. Common in industrial control panels, marine equipment, and warning-light assemblies where white illumination is needed.

What are the specifications of the APPROVED VENDOR 312-10PK bulb?

The APPROVED VENDOR 312-10PK is an incandescent bulb with a BA15d double-contact bayonet base, S11 bulb shape, 28V AC operating voltage, and white light output. Its trade number is 312. The bulb is designed for sign and signal applications, providing reliable illumination in low-voltage AC circuits.

Where to buy APPROVED VENDOR 312 bulbs in worldwide?

3G Electric supplies the APPROVED VENDOR 312-10PK incandescent bulb worldwide. As a global industrial distributor, we handle full logistics, customs clearance, and delivery to your facility. Contact us for availability and lead time. We source and deliver this BA15d lamp to any international destination.

How to select the correct BA15d incandescent bulb for a 28V system?

Select a BA15d bulb like the APPROVED VENDOR 312 that matches your fixture's voltage rating—28V AC in this case. Verify the bulb shape (S11) fits the housing, and confirm the trade number (312) corresponds to your required light output. Always check the base type: double-contact bayonet (BA15d) ensures proper polarity and secure fit.

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 ba15d double-contact 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, Double Contact Bayonet (BA15d), (S) Sign, S8, 308 (MPN 308-10PK). Key specifications — Light Color: White; Trade Number: 308; Voltage: 28V AC; Brand: APPROVED VENDOR; Bulb Shape: S8.
APPROVED VENDOR
APPROVED VENDOR Incandescent Bulb: Incandescent, Double Contact Bayonet (BA15d), (S) Sign, S8, 308 (MPN 308-10PK). Key specifications — Light Color: White; Trade Number: 308; Voltage: 28V AC; Brand: APPROVED VENDOR; Bulb Shape: S8.
APPROVED VENDOR Incandescent Bulb: Incandescent, Double Contact Bayonet (BA15d), (S) Sign, S8, 306 (MPN 306-10PK). Key specifications — Light Color: White; Trade Number: 306; Voltage: 28V AC; Brand: APPROVED VENDOR; Bulb Shape: S8.
APPROVED VENDOR
APPROVED VENDOR Incandescent Bulb: Incandescent, Double Contact Bayonet (BA15d), (S) Sign, S8, 306 (MPN 306-10PK). Key specifications — Light Color: White; Trade Number: 306; Voltage: 28V AC; Brand: APPROVED VENDOR; Bulb Shape: S8.
APPROVED VENDOR Incandescent Bulb: Incandescent, Double Contact Bayonet (BA15d), (S) Sign, S8, 1638 (MPN 1638-10PK). Key specifications — Light Color: White; Trade Number: 1638; Voltage: 28V AC; Brand: APPROVED VENDOR; Bulb Shape: S8.
APPROVED VENDOR
APPROVED VENDOR Incandescent Bulb: Incandescent, Double Contact Bayonet (BA15d), (S) Sign, S8, 1638 (MPN 1638-10PK). Key specifications — Light Color: White; Trade Number: 1638; Voltage: 28V AC; Brand: APPROVED VENDOR; Bulb Shape: S8.
APPROVED VENDOR Incandescent Bulb: Incandescent, Double Contact Bayonet (BA15d), (S) Sign, S8, 1692 (MPN 1692-10PK). Key specifications — Light Color: White; Trade Number: 1692; Voltage: 28V AC; Brand: APPROVED VENDOR; Bulb Shape: S8.
APPROVED VENDOR
APPROVED VENDOR Incandescent Bulb: Incandescent, Double Contact Bayonet (BA15d), (S) Sign, S8, 1692 (MPN 1692-10PK). Key specifications — Light Color: White; Trade Number: 1692; Voltage: 28V AC; Brand: APPROVED VENDOR; Bulb Shape: S8.
APPROVED VENDOR Incandescent Bulb: Incandescent, Double Contact Bayonet (BA15d), (S) Sign, S8, 94 (MPN 94-10PK). Key specifications — Light Color: White; Trade Number: 94; Voltage: 12.8V AC; Brand: APPROVED VENDOR; Bulb Shape: S8.
APPROVED VENDOR
APPROVED VENDOR Incandescent Bulb: Incandescent, Double Contact Bayonet (BA15d), (S) Sign, S8, 94 (MPN 94-10PK). Key specifications — Light Color: White; Trade Number: 94; Voltage: 12.8V AC; Brand: APPROVED VENDOR; Bulb Shape: S8.
APPROVED VENDOR Incandescent Bulb: Incandescent, Double Contact Bayonet (BA15d), (S) Sign, S8, 308 (MPN 308-1PK). Key specifications — Light Color: White; Trade Number: 308; Voltage: 28V AC; Brand: APPROVED VENDOR; Bulb Shape: S8.
APPROVED VENDOR
APPROVED VENDOR Incandescent Bulb: Incandescent, Double Contact Bayonet (BA15d), (S) Sign, S8, 308 (MPN 308-1PK). Key specifications — Light Color: White; Trade Number: 308; Voltage: 28V AC; Brand: APPROVED VENDOR; Bulb Shape: S8.

More from APPROVED VENDOR

View all APPROVED VENDOR parts →
APPROVED VENDOR Incandescent Bulb: Incandescent, Double Contact Bayonet (BA15d), (S) Sign, S8, 1204. Key specifications — Light Color: White; Trade Number: 1204; Voltage: 28V AC; Brand: APPROVED VENDOR; Bulb Shape: S8.
APPROVED VENDOR
APPROVED VENDOR Incandescent Bulb: Incandescent, Double Contact Bayonet (BA15d), (S) Sign, S8, 1204. Key specifications — Light Color: White; Trade Number: 1204; Voltage: 28V AC; Brand: APPROVED VENDOR; Bulb Shape: S8.
APPROVED VENDOR Incandescent Bulb: Incandescent, Double Contact Bayonet (BA15d), (S) Sign, S6, White (MPN 6S6DC/130V). Key specifications — Light Color: White; Trade Number: 6S6DC/130V; Voltage: 130V AC; Brand: APPROVED VENDOR; Bulb Shape: S6.
APPROVED VENDOR
APPROVED VENDOR Incandescent Bulb: Incandescent, Double Contact Bayonet (BA15d), (S) Sign, S6, White (MPN 6S6DC/130V). Key specifications — Light Color: White; Trade Number: 6S6DC/130V; Voltage: 130V AC; Brand: APPROVED VENDOR; Bulb Shape: S6.
APPROVED VENDOR Incandescent Bulb: Incandescent, Double Contact Bayonet (BA15d), (S) Sign, S6, White (MPN 6S6DC/120V). Key specifications — Light Color: White; Trade Number: 6S6DC/120V; Voltage: 120V AC; Brand: APPROVED VENDOR; Bulb Shape: S6.
APPROVED VENDOR
APPROVED VENDOR Incandescent Bulb: Incandescent, Double Contact Bayonet (BA15d), (S) Sign, S6, White (MPN 6S6DC/120V). Key specifications — Light Color: White; Trade Number: 6S6DC/120V; Voltage: 120V AC; Brand: APPROVED VENDOR; Bulb Shape: S6.
APPROVED VENDOR Incandescent Bulb: Incandescent, Double Contact Bayonet (BA15d), (S) Sign, S8, 306 (MPN 306-1PK). Key specifications — Light Color: White; Trade Number: 306; Voltage: 28V AC; Brand: APPROVED VENDOR; Bulb Shape: S8.
APPROVED VENDOR
APPROVED VENDOR Incandescent Bulb: Incandescent, Double Contact Bayonet (BA15d), (S) Sign, S8, 306 (MPN 306-1PK). Key specifications — Light Color: White; Trade Number: 306; Voltage: 28V AC; Brand: APPROVED VENDOR; Bulb Shape: S8.
APPROVED VENDOR Incandescent Bulb: Incandescent, Double Contact Bayonet (BA15d), (T) Tubular, T6-1/2 (MPN 4RZX8). Key specifications — Light Color: White; Voltage: 120V AC; Brand: APPROVED VENDOR; Bulb Shape: T6-1/2.
APPROVED VENDOR
APPROVED VENDOR Incandescent Bulb: Incandescent, Double Contact Bayonet (BA15d), (T) Tubular, T6-1/2 (MPN 4RZX8). Key specifications — Light Color: White; Voltage: 120V AC; Brand: APPROVED VENDOR; Bulb Shape: T6-1/2.
APPROVED VENDOR Incandescent Bulb: Incandescent, Double Contact Bayonet (BA15d), (S) Sign, S8, 1228 (MPN 1228-10PK). Key specifications — Light Color: White; Trade Number: 1228; Voltage: 32V AC; Brand: APPROVED VENDOR; Bulb Shape: S8.
APPROVED VENDOR
APPROVED VENDOR Incandescent Bulb: Incandescent, Double Contact Bayonet (BA15d), (S) Sign, S8, 1228 (MPN 1228-10PK). Key specifications — Light Color: White; Trade Number: 1228; Voltage: 32V AC; Brand: APPROVED VENDOR; Bulb Shape: S8.
APPROVED VENDOR Incandescent Bulb: Incandescent, Double Contact Bayonet (BA15d), (G) Globe, G6, 82 (MPN 82-10PK). Key specifications — Light Color: White; Trade Number: 82; Voltage: 6.5V AC; Brand: APPROVED VENDOR; Bulb Shape: G6.
APPROVED VENDOR
APPROVED VENDOR Incandescent Bulb: Incandescent, Double Contact Bayonet (BA15d), (G) Globe, G6, 82 (MPN 82-10PK). Key specifications — Light Color: White; Trade Number: 82; Voltage: 6.5V AC; Brand: APPROVED VENDOR; Bulb Shape: G6.
APPROVED VENDOR Incandescent Bulb: Incandescent, Double Contact Bayonet (BA15d), (G) Globe, G6, 304 (MPN 304-1PK). Key specifications — Light Color: White; Trade Number: 304; Voltage: 28V AC; Brand: APPROVED VENDOR; Bulb Shape: G6.
APPROVED VENDOR
APPROVED VENDOR Incandescent Bulb: Incandescent, Double Contact Bayonet (BA15d), (G) Globe, G6, 304 (MPN 304-1PK). Key specifications — Light Color: White; Trade Number: 304; Voltage: 28V AC; Brand: APPROVED VENDOR; Bulb Shape: G6.