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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Giddings & Lewis 501-04172-00 / 502-03326-00 Linear Isolator Circuit Board

$49.99 USD

Sale Sold out

✓ 30-day returns on every item — return policy

ConditionSurplus - Untested MPN501-04172-00 / 502-03326-00 Stock #0226-00520

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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Product Specifications

Manufacturer: Giddings & Lewis
MPN / Model: 501-04172-00 / 502-03326-00
Product Type: Linear Isolator Circuit Board
Serial (barcode label): A27941
IC-1, IC-2: Burr-Brown ISO100AP
IC-3: Burr-Brown 722 HV-ISO DC/DC CONV
Terminal Blocks: Four 6-position screw blocks, numbered 1 to 12 (SIG1, SIG2)
IC-4, IC-5: Empty sockets
Condition: Surplus - Untested

Product Description

This is a Giddings & Lewis 501-04172-00 linear isolator circuit board. The board silkscreen reads 501-04172-00, a partial -03326- (the rest is hidden behind a terminal block) and a partial line ending in AR ISOLA. A barcode label on the board edge reads A27941. The component markings read Burr-Brown 722 HV-ISO DC/DC CONV (IC-3), two Burr-Brown ISO100AP (IC-1 and IC-2), and green trimmers marked 255-20T 1MEG. A number is printed along the left board edge but is not clearly readable. No ratings, standards, certifications or country of origin are shown on the board.

The board has two channels labeled SIG1 and SIG2, each with two 6-position screw terminal blocks. IC-4 and IC-5 are empty sockets. Test points TP2, TP3, TP4, TP5 and TP9 and trimmers VR1-2, VR1-3 and VR1-4 are marked on the board. Gold edge fingers are along the top and bottom edges. The board shows dirt and discoloration, mainly along the lower edge and the bottom edge fingers.

Sold as surplus, untested. This unit has not been powered on or tested by MRO Exchange, and the function, calibration and isolation performance have not been verified.

Stock # 0226-00520

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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.