AllansonIgnition Transformers

Allanson 421-659 Ferromagnetic Ignition Transformer for Industrial Combustion

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-03295

Also listed as: 421659 · 421 659

Brand

Allanson

Item

421-659 Ferromagnetic Ignition Transformer for Industrial Combustion

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

Poles

Double 

Current

23mA 

Can Size

Large Can Series 

Grounding

Mid Point Ground 

Application

OIL

Burner Type

INDUSTRIAL COMBUSTION 

Hv Terminal

Rajah Connector 

Junction Box

INTERNAL 

Input Voltage

120V 

Input Frequency

60Hz 

Secondary Voltage

10000V 

Burner Manufacturer

INDUSTRIAL COMBUSTION 

Datasheet Content

[{"filename":"FerromagneticDP_SpecSheet_21-4141121_04-Sep-2025.pdf","text":"FERROMAGNETIC TRANSFORMERS\n                                                                       2721 / 2744 / 2730 / 2714 / 421 / 444 / 911 / 912\n                                                                                         SPECIFICATION GUIDE\n\n\n                    DOUBLE POLE, MID POINT GROUND MODELS\n\n Allanson’s ferromagnetic transformers are designed for constant duty and provide the most reliable ignition\n source for commercial and/or industrial oil applications.\n\n\n  Absolute Maximum Ratings\n  Model #                                           2721, 421*        2744, 444*         911*       2730, 912*         2714\n  Rated Operating Input Voltage (V)                     120               240             240           120             120\n  Operating Input Voltage Range (V)                   108-132           216-252        216-252        108-132        108-132\n  Input Supply Frequency (Hz)                            60                60             50             50             60\n  Primary Voltage - Amperes (VA)                        250               250             250           250             275\n  Secondary Voltage (RMS)                              10,000            10,000         10,000         10,000         12,000\n  Secondary Short Circuit Current (mA)                   23                23              23            23              20\n  Storage Temperature (°C)                          -40 to +80        -40 to +80      -40 to +80    -40 to +80      -40 to +80\n  Operating Temperature (°C)                        -30 to +40        -30 to +40      -30 to +40    -30 to +40      -30 to +40\n  Operating Relative Humidity (%)                        90                90              90            90              90\n  Loading Air Gap (inches)                           1/8 - 3/16        1/8 - 3/16     1/8 - 3/16     1/8 - 3/16     1/8 - 3/16\n\n * Service replacement transformers are available in select models.\n\n\n\n\n83 Commerce Valley Drive E., Markham, ON L3T 7T3                                    181 Cooper Ave., Suite 112, Tonawanda, NY 14150   #21-414\n      T: 1.800.661.7251 ● F: 1.416.752.6718                                               T: 1.631.293.3880 ● F: 1.631.293.3470        1121\n\n\n                  For more information, please visit us at allanson.com or e-mail us at cservice@allanson.com"}]

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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 421-659 ignition transformer used for?

The Allanson 421-659 is a ferromagnetic ignition transformer designed for constant duty in industrial combustion oil burners. It provides a reliable ignition source for commercial, residential, and industrial oil applications, delivering 10,000 V secondary voltage at 23 mA to ignite fuel oil in burner systems.

What are the specifications of the Allanson 421-659?

The Allanson 421-659 is a double-pole, mid-point ground transformer with 120 V input at 60 Hz. It has a secondary voltage of 10,000 V RMS, secondary short circuit current of 23 mA, and a loading air gap of 1/8 to 3/16 inches. It operates from -30 to +40 °C and stores from -40 to +80 °C.

Where to buy the Allanson 421-659 in Singapore?

3G Electric supplies the Allanson 421-659 ferromagnetic ignition transformer to customers in Singapore. We source and deliver this industrial combustion component, handling logistics, customs clearance, and local delivery. Contact 3G Electric for pricing and lead time on this Allanson transformer.

How to install the Allanson 421-659 ignition transformer?

Install the Allanson 421-659 by mounting it securely in the burner control circuit, ensuring the internal junction box is properly connected. Verify the input voltage is 120 V at 60 Hz and the secondary Rajah connector is attached to the spark electrode. Follow the burner manufacturer's wiring diagram for safe operation.

Used in

Common applications for Allanson

Oil burner retrofit maintenance — Allanson CAT 1092 TYPE F transformer replacement in existing Beckett control circuits

Industrial heating-system commissioning — Control transformer installation in multi-stage flame-safeguard burner startup sequences

Plant emergency maintenance — Same-day T92 transformer procurement to restore failed ignition control voltage supply

Burner control-cabinet assembly — Allanson transformer integration in custom control-circuit designs for process-heating applications

Field technician spare-parts kit — Stocking CAT 1092 and T92 variants for mobile maintenance coverage of regional burner installations

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.

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