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

3G Electric
Allanson 421-BT387-SF Ferromagnetic Ignition Transformer - Ignition Transformers
AllansonIgnition Transformers

Allanson 421-BT387-SF Ferromagnetic Ignition Transformer

Allanson’s Double Pole ferromagnetic transformers are designed for constant duty and provide the most reliable ignition source for commercial, residential and industrial oil applications.

SKU 3G-OTH-03299

Also listed as: 421BT387SF · 421 BT387 SF

Brand
Allanson
Item
421-BT387-SF Ferromagnetic Ignition Transformer
Part Number
421-BT387-SF
Category
Ignition Transformers
UNSPSC
39121003 — Instrument transformers
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
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

Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

Allanson
Manufacturer Part Number
421BT387SF
Poles
Double
Current
23mA
Grounding
Mid Point Ground
Application
OIL
Secondary Voltage
10000V

Technical Documents

(1)
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

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

Product Description

Allanson’s Double Pole ferromagnetic transformers are designed for constant duty and provide the most reliable ignition source for commercial, residential and industrial oil applications.

Frequently Asked Questions

What is the Allanson 3G-OTH-03299 ignition transformer used for?

The Allanson 3G-OTH-03299 is a double-pole ferromagnetic ignition transformer designed for constant-duty commercial, residential, and industrial oil-burner applications. It provides a reliable 10,000 V secondary voltage at 23 mA to ignite fuel oil in boilers, furnaces, and other oil-fired equipment.

What are the specifications of the Allanson 3G-OTH-03299?

The Allanson 3G-OTH-03299 is a double-pole, mid-point grounded ferromagnetic transformer with a secondary voltage of 10,000 V RMS and a secondary short-circuit current of 23 mA. It operates at 120 V input (108–132 V range), 60 Hz, with a 250 VA rating. Storage temperature is -40 to +80 °C; operating temperature is -30 to +40 °C.

Where to buy the Allanson 3G-OTH-03299 in Singapore?

3G Electric supplies the Allanson 3G-OTH-03299 ferromagnetic ignition transformer to customers in Singapore. We handle logistics, customs clearance, and delivery to your facility. Contact us for pricing and lead time on this model.

How to install the Allanson 3G-OTH-03299 ignition transformer?

Install the Allanson 3G-OTH-03299 by mounting it securely in the oil burner control circuit, ensuring the input voltage matches the 120 V rating. Connect the high-voltage secondary leads to the ignition electrodes with a loading air gap of 1/8 to 3/16 inches. Follow the manufacturer's wiring diagram and local electrical codes.

Used in

Common applications for Allanson
Industrial gas combustion — Allanson 1196-H ferromagnetic ignition transformer for constant-duty spark generation in commercial and industrial gas burners.
Carlin oil burner retrofit — Allanson 2730-630 ignition transformer for Carlin 99, 100, 101, and Card Miser burners, operating at 110V/50Hz.
Gordon Piatt burner service — Allanson 542-GP ignition transformer with 1/4-20 stud terminal for reliable ignition in Gordon Piatt gas burners.
PVI Industries oil heating — Allanson 421-663 double-pole transformer for oil-fired PVI Industries boilers, providing mid-point grounded ignition.
Commercial kitchen ventilation — Allanson DCC2C32700-120-277V LED power supply for dimmable hood lamp lighting in commercial kitchen exhaust systems.
Process heating systems — Allanson 1092-IC ignition transformer for industrial combustion applications requiring 25/20mA output and Rajah connector.
Not sure this is the right part? Photo-identify it

Allanson Products

3G Electric supplies Allanson ignition transformers. 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

More from Allanson

View all Allanson parts
Allanson 1092-H Ferromagnetic Ignition Transformer for Industrial Combustion
Allanson
Allanson 1092-H Ferromagnetic Ignition Transformer for Industrial Combustion
Allanson
Allanson
Allanson 2742-662 Ignition Transformer for Gordon Piatt
Allanson
Allanson
Allanson 2742-500 Ignition Transformer
Allanson
Allanson
Allanson 2742-655-G Ignition Transformer for Power Flame
Allanson 542-GP Ferromagnetic Ignition Transformer for Gordon Piatt
Allanson
Allanson 542-GP Ferromagnetic Ignition Transformer for Gordon Piatt
Allanson
Allanson
Allanson 2729-411 Ferromagnetic Transformer for Abc
Allanson 542-H Ferromagnetic Ignition Transformer for Industrial Combustion
Allanson
Allanson 542-H Ferromagnetic Ignition Transformer for Industrial Combustion
Allanson 2714-633 Ferromagnetic Ignition Transformer for Carlin
Allanson
Allanson 2714-633 Ferromagnetic Ignition Transformer for Carlin

Customer reviews

No reviews yet — be the first

Questions & answers

No questions yet — ask us the first