How does shipping work for orders on MRO Exchange?

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.

What payment methods does MRO Exchange accept?

MRO Exchange accepts all major credit cards, PayPal, and Shop Pay. Purchase order and wire transfer payment is also available, with payment due prior to shipment. Custom terms are available for established accounts.

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Psytronics P4803D Transient Voltage Surge Suppressor 480V AC 3-Phase Open Box - Unused

$69.00 USD

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✓ 30-day returns on every item — return policy

ConditionOpen Box - Unused MPNP4803D Stock #0226-00037

30-day returns on every item. Photos reflect the actual item’s current condition — see our return policy and condition guide.

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⚡ Same-day shipping available — order by 11 am CT ($100 add-on at checkout)

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The Psytronics P4803D is a transient voltage surge suppressor designed for three phase 480 volt industrial power systems. Built by Psytronics, a Reno, Nevada manufacturer specializing in transient voltage protection systems, this unit is intended to protect connected equipment from voltage spikes, lightning induced transients, and switching surges on the line side of industrial control panels, machine tools, motor control centers, and distribution panels.

Per the nameplate, the unit is rated for 3 phase operation at 480 volts. The enclosure is a gray molded housing with a clear viewing window for the integrated status indicator light, which signals when the suppression circuitry has reached end of life and requires replacement. A contact phone number is printed on the nameplate for diagnostic reference. The housing is sealed and intended for direct mounting to a panel knockout or junction box via the integrated threaded conduit hub, with field wiring leads exiting through the bottom of the unit.

Model number P4803D is published by Psytronics for 480V 3 phase service and is a direct replacement for existing P4803D installations. Compatible applications include CNC machine tools, industrial automation panels, HVAC equipment, pumping stations, and any 480V 3 phase load requiring point of use surge protection. The manufacturer address listed on the label is 5635 Riggins Court, Unit 15, Reno, Nevada 89502.

Stock # 0226-037

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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.