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Most orders ship within 1–2 business days via UPS. Larger equipment ships via freight carrier, and customers can use the shipping estimator on the product page for a location-specific quote. Local pickup is also available at the Fairfield, IL facility, typically ready within 4 hours.

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MeK-Tronics 5814-0003-002 Control Transformer

$65.00 USD

Sale Sold out

ConditionSurplus - Untested MPN5814-0003-002 Stock #0526-02261

Photos reflect current condition. Items differing from description may be eligible for return or refund — see our condition guide.

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Estimated package weight: 5.0 lbs

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Rated at 480V primary to 24V secondary with a 40VA capacity, this MeK-Tronics control transformer carries part number 5814-0003-002 and is widely cataloged in the US market under Marley Engineered Products, Berko, and QMark branding. Internal markings also include MKT-04E0ZZ03-147 and date code T1 1624. The unit operates on 50/60 Hz input and uses Class 130 (B) insulation. UL recognition is indicated by the cULus mark with file number E528105, with Class 2 dry / Class 3 wet ratings noted on the nameplate.

The primary winding terminates in two black leads marked COM and 480V, while the secondary winding terminates in two yellow leads marked 24V. Construction is open frame with a laminated steel core, plastic bobbin, and integrated foot bracket for mounting. Pre-stripped flying leads are supplied for field termination, and red insulated quick-connect terminals are crimped onto the secondary leads.

Common applications include HVAC control circuits, electric heater controls, thermostats, relays, and other low voltage components fed from a 480V branch. This part is referenced as a service replacement across Berko, Marley, and QMark electric heater lines, and is cross referenced to Hartland Controls HCT-04E0K03201. Country of origin marked on the nameplate is Vietnam.

Stock # 0526-02261

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Frequently Asked Questions

Shipping & Handling

Most orders ship within 1–2 business days via UPS, but expedited same-day handling is available as an add-on to orders in cart. Larger equipment ships via freight carrier. Use the shipping estimator above for a location-specific quote. Local pickup is also available at our Fairfield, IL facility, typically ready within 4 hours.

Returns & Condition

All items are sold as-described based on the photos and condition listed. If an item arrives differing from its description, it may be eligible for return or refund. See our full condition guide for details on our grading terms.

Payment Options

We accept all major credit cards, PayPal, and Shop Pay. Purchase order and wire transfer payment is also available by selecting "Purchase Order / Wire Transfer" at checkout. Payment is due prior to shipment. Contact us for custom terms on established accounts. Tax exemptions are honored if proper documentation is provided.