Linear 2500-1776, Transformer 120/24 250Va Msg-D

Linear 2500-1776 115V to 24V 250VA Transformer Product Overview

The Linear 2500-1776 is a 115V primary to 24V secondary transformer rated at 250VA for select Linear / OSCO commercial gate operator applications. In the operator, the transformer supplies 24VAC power to control circuits and related low-voltage loads. The 250VA capacity is important because the transformer has to support the required control circuit load without overheating or causing low-voltage dropouts.

This part is commonly tied to MSG-D service references and appears in Linear / OSCO replacement-part listings as a transformer only. It may also be associated with SWD repair references where the transformer assembly or parts diagram calls for this specific transformer. Because transformer fitment depends on voltage, VA rating, mounting, and terminal layout, confirm the operator model and serial range before replacing it. A failed transformer can be caused by age, lightning or surge damage, moisture, shorted low-voltage wiring, or an overloaded accessory circuit.

Compatible With

Use this transformer only where the Linear / OSCO parts diagram calls for part number 2500-1776 or a 115/24V 250VA transformer of the same configuration.

• Linear / OSCO MSG-D gate operator replacement-part applications where 2500-1776 is specified
• Select Linear / OSCO SWD repair references when the parts diagram lists the 2500-1776 transformer or related transformer assembly
• Commercial gate operator control circuits requiring 115V input and 24VAC output at 250VA
• Related transformer assembly references such as 2510-223, when the diagram identifies 2500-1776 as the transformer only
• Not a substitute for lower VA accessory transformers, 230V primary transformers, or DC power supplies

Features & Specifications

Also Known As / Related Part Numbers

• 2500-1776
• 25001776
• LIN-2500-1776
• Linear 115/24V 250VA transformer
• Linear 120/24 250VA transformer
• MSG-D transformer
• Transformer only 115/24V 250VA
• Related assembly reference: 2510-223 where specified by diagram

Technician Note

If the transformer secondary voltage is low or the replacement transformer fails, disconnect and test low-voltage loads. Accessory shorts and wet wiring can damage a new transformer quickly.

Before Ordering

• Confirm the old transformer label or parts diagram shows 2500-1776
• Match 115/120V primary and 24VAC secondary requirements
• Confirm the 250VA rating is required for the operator
• Check mounting and terminal layout before ordering
• Inspect low-voltage accessory wiring for shorts before replacement

Professional Advisory

Transformer replacement involves line voltage on the primary side. Use a qualified gate technician for diagnosis, wiring, and post-replacement voltage checks.

Important Ordering Warnings

Do not replace this transformer with a smaller VA unit, a different primary-voltage transformer, or a DC power supply unless the operator documentation specifically approves it.

Product Questions & Answers

What voltage does the Linear 2500-1776 provide?

It is used as a 115V/120V AC primary to 24V AC secondary transformer rated at 250VA.

Is this only for MSG-D operators?

It is commonly associated with MSG-D replacement-part applications, and may appear in other Linear / OSCO diagrams. Verify by model and parts diagram.

Can I use a smaller 24V transformer?

No. The VA rating must match the operator load. A smaller transformer can overheat or cause control power problems.

What can cause this transformer to fail?

Common causes include surge damage, moisture, shorted accessory wiring, overloaded low-voltage circuits, or age-related failure.

Should I test anything before replacing it?

Yes. Check incoming voltage, secondary wiring, accessory loads, fuses, and control circuit condition before installing a new transformer.