Allanson Transformers 421-BT636 Transformer

The Allanson 421-BT636 is a heavy-duty universal ignition transformer designed for reliable spark ignition in industrial and residential oil burners. Engineered with a 120Vac supply voltage and a 10,000Vac secondary voltage at 23mA, this unit ensures a consistent high-voltage arc for efficient combustion. Featuring a mid-point ground configuration, it provides stable electrical performance and reduced electromagnetic interference. As a direct replacement for 28237, the 421-BT636 streamlines field repairs by matching the footprint and electrical specifications of legacy Beckett oil burner transformers. This iron-core transformer is built for high-duty cycles, maintaining a robust secondary current output even in demanding environments. For technicians upgrading older systems, this high voltage igniter offers a proven solution for oil burner transformer replacement, ensuring proper impedance matching and terminal connectivity for a wide range of burner housings and electrode configurations.

• Universal Compatibility: Serves as a drop-in replacement for Allanson 28237 and various Beckett-style igniters.
• Robust Secondary Output: Delivers 10,000V at 23mA to ensure reliable ignition of high-pressure oil sprays.
• Mid-Point Grounding: Enhances circuit stability and safety by balancing the secondary voltage potential.
• Durable Construction: Traditional iron-core design provides superior heat dissipation and longevity compared to lighter electronic alternatives.

Common Questions

Is the Allanson 421-BT636 compatible with Beckett AF and AFG burners?
Yes, this universal igniter is specifically designed to match the electrical and mounting requirements of Beckett AF and AFG series burners, replacing the 28237 model seamlessly.

What are the benefits of a mid-point ground transformer over a single-pole unit?
Mid-point grounding balances the electrical stress across the insulation, reducing the risk of internal short circuits and extending the life of the secondary windings in high-voltage applications.

How do I verify if my current transformer needs replacement?
Technicians should check for a weak or intermittent spark, cracked ceramic bushings, or a drop in secondary voltage output using a dedicated high-voltage probe or transformer tester.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.