
638-531-207 Comparison
| photo | price | summary | rating |
|---|---|---|---|
![]() | $55.00 | Condition is New – Open box, Sid Harvey 638-531-207 T21N Ignition Transformer 120V to 10,000V New Open Box, shipping cost = $13.01 | 100.0% |

The Harvey 638-531-207 Sid T21N Ignition Transformer is a versatile and reliable component designed for use in various ignition systems. This transformer operates on a 120V AC input voltage and produces a high-voltage output of up to 10,000V. It is housed in a sturdy and compact box, measuring approximately 5.1 inches long, 3.1 inches wide, and 2.2 inches high, making it an ideal fit for applications where space is a concern.
The transformer's construction is robust and durable, engineered to withstand the rigors of industrial use. It features a high-quality, heavy-duty insulation system that ensures reliable performance and extends the life of the transformer. The windings are made of fine, high-strand copper wire, which provides excellent conductivity and reduces electrical resistance, ensuring efficient power transfer.
The Sid T21N Ignition Transformer is designed to meet the demanding requirements of various ignition systems. It is suitable for use in applications such as industrial furnaces, oil burners, and gas engines. The transformer's high-voltage output is generated through a carefully designed and optimized core, which ensures consistent and stable performance.
The transformer is easy to install, with clear markings on the box indicating the input and output terminals. It is also equipped with a grounding terminal, which is essential for safety and proper operation. The transformer is designed to operate quietly, with minimal heat dissipation, making it an excellent choice for applications where noise and heat are concerns.
In summary, the Harvey 638-531-207 Sid T21N Ignition Transformer is a high-performance, reliable, and compact transformer that is suitable for use in a wide range of industrial ignition applications. Its robust construction, efficient design, and easy installation make it an excellent value for money component for any industrial operation.
Pros and Cons of Buying Harvey 638-531-207 Sid T21N Ignition Transformer
1. Pros:a. High Voltage Capability: This transformer offers a high voltage output of 10,000 volts, making it suitable for various ignition applications.
b. Compact Design: The Sid T21N transformer has a compact size, which is advantageous for installations where space is limited.
c. Durable Construction: Harvey transformers are known for their robust design and long-lasting performance. This transformer is no exception, as it is built to withstand harsh environments and heavy usage.
d. UL Listed: The transformer is UL listed, ensuring that it meets the safety standards set by Underwriters Laboratories.
2. Cons:a. Higher Cost: The Harvey Sid T21N ignition transformer may be more expensive compared to other transformers due to its high voltage capabilities and durable construction.
b. Limited Applications: Given its high voltage output, this transformer might not be suitable for all ignition applications. It is essential to verify that it is compatible with your specific use case before making a purchase.
3. Conclusion:The Harvey 638-531-207 Sid T21N ignition transformer is a reliable and durable solution for applications requiring a high voltage output. Its compact size, robust construction, and UL listing make it an attractive choice for users looking for a high-performance ignition transformer. However, its higher cost and limited applications may be drawbacks for some users.
4. Recommendation:If you require a high voltage ignition transformer for your application and have the budget for it, the Harvey Sid T21N transformer is an excellent choice. Its durability, compact design, and UL listing make it a worthwhile investment for ignition applications where reliability and safety are essential. However, if your application does not require such a high voltage output, consider looking for a more cost-effective option with lower voltage capabilities.
Details:
See photos for condition. Original box not included. Secondary midpoint grounded. Pulled from surplus inventory.
Details: part number: 638-531-207. Output: 23 ma. Never installed or used. May show minor cosmetic wear from long-term storage.
Primary: 120v, 60hz. Buyer is to verify compatibility before purchase. Secondary: 10,000v. Sid Harvey ignition transformer, new open box / old inventory.
specifications centrafurn:
- brand: Harvey
- mpn: 638-531-207
- model: 638-531-207 T21n
- voltage: 120 V
- type: Oil Boiler
- power source: Oil
- heating system: Boiler
seller centrafurn:
- city: louisville, kentucky
- # reviews: 61
- rating: 100.0%
payments centrafurn:
- credit card: visa
- other
- wallet: google-pay
offer centrafurn:
- price: $55.00
- item condition: New – Open box
- started: january 10, 2026
- sold #: 14
- options: ship-to-home
- in stock #: 1
- availability: in stock
- best offers: true
shipping centrafurn:
- carrier: usps
- service: usps ground advantage
- transit: 4-11 days
- type: calculated
- class: standard
general centrafurn:
- category: Home & Garden > Heating, Air > Cooling Systems > Central Furnaces
returns centrafurn:
- policy: no returns
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