GE 12HGA11J52 | 125VDC HGA Auxiliary Relay

• Model & Brand: GE 12HGA11J52, HGA electromechanical auxiliary relay, rated for 125 VDC control service. It is identified as an auxiliary/control relay for GE circuit-breaker equipment.
• Application: Associated with GE AK-50, AK-75, AK-100, and MAGNE-BLAST breaker equipment; one equipment source specifically identifies it as a 125VDC instantaneous auxiliary relay.
• Physical Dimensions: A dedicated OEM dimensional drawing was not located for this exact catalog number. One supplier provides a 9 × 9 × 9 in shipping package rather than a confirmed relay-body dimension. Use the actual component and breaker drawing for cabinet/interlock clearance.
• Estimated Shipping Weight: Approximately 2 lb / 0.91 kg according to GE-product distributor records. This is best treated as a shipment reference; actual gross weight depends on packaging.
• What’s in the Box: Normally the 12HGA11J52 relay assembly. Do not assume auxiliary contacts, mounting hardware, breaker-specific wiring, or an instruction manual are included unless listed on the packing list.
• Electrical Type: Electromechanical hinged-armature auxiliary relay, IEEE device designation 94x.
• Service Identification: The historical instruction reference is GEH-1793.

Product Introduction

In a GE air circuit-breaker control scheme, the 12HGA11J52 is installed as part of the auxiliary control/interlocking function rather than as a PLC I/O module. Its documented application includes GE AK-50, AK-75, AK-100, and MAGNE-BLAST equipment, where relay contacts can be used to pass status or control signals between portions of the breaker circuit.

The relay is specified for a 125 VDC coil/control supply and belongs to the HGA hinged-armature family. A qualified-parts catalog also identifies 12HGA11J52 as a General Electric control relay, 125 VDC, with a nuclear-qualified reference number, showing that the part has appeared in tightly controlled industrial applications.

Core Technical Specifications

The 125 VDC rating, HGA family, hinged-armature construction, 94x classification, and GEH-1793 reference are supported by current product records.

Power and Thermal Note

A dependable OEM coil-wattage figure for this exact 12HGA11J52 was not established from the available sources. Do not estimate panel heat from generic HGA relay data. For a breaker cabinet thermal calculation, use the actual relay coil resistance/current specification from the applicable GE drawing or measure the replacement coil under controlled test conditions.

GE 12HGA11J52

🚨 Global Compliance & Industry Certifications

This relay should be handled as legacy switchgear control equipment, with certification assessed according to the complete breaker assembly and application.

• UL / cUL: GE auxiliary relays were used within UL-recognized breaker equipment, but an exact standalone UL certificate for 12HGA11J52 was not located during verification.
• CE: No reliable exact CE declaration for this catalog number was identified.
• ATEX / IECEx: No evidence was located establishing standalone ATEX or IECEx certification for the 12HGA11J52.
• Marine Approvals: DNV, ABS, and similar marine approvals were not verified for this exact relay.
• Qualified Applications: A Curtiss-Wright Qualified Parts Catalog identifies 12HGA11J52 as a GE 125 VDC control relay, with reference T9418EL. This is evidence of qualification in a controlled procurement context, but it should not be confused with ATEX, IECEx, or general hazardous-location certification.

For breaker safety, the relevant approval can depend on the relay, breaker mechanism, wiring, enclosure, and complete assembly. A relay’s voltage rating alone does not establish approval for a classified installation.

Verify specific lot certifications with OEM.

🚨 Long-Term Storage & Asset Preservation Guide

Keep the relay dry, clean, and protected from mechanical shock. Hinged-armature mechanisms contain moving ferromagnetic components and contact assemblies; rough handling can alter alignment even when the enclosure shows no obvious damage.

Protect the coil and contact terminals from oxidation. Store the relay in a sealed protective package with suitable desiccant where warehouse humidity is not tightly controlled. Avoid exposing the contacts to acidic paper, corrosive packaging material, or uncontrolled condensation.

Do not exercise the relay repeatedly just to prove that it moves. Contact wear and mechanical cycling are unnecessary during routine inventory inspection. Verify identification, coil condition, terminal integrity, and insulation condition first (then perform electrical testing under an approved procedure).

For long-term inventory, record the part number, visible markings, date/lot information, storage condition, inspection date, and test status. A legacy relay should have a traceable history because replacement specifications are often tied to the original breaker schematic.

Physical Installation Prerequisites

The 12HGA11J52 is a breaker-specific auxiliary relay, so its mounting arrangement cannot safely be reduced to a generic DIN-rail installation instruction. The relay must match the mechanical and electrical arrangement of the equipment in which the original was installed.

Before installation:

• Confirm the complete 12HGA11J52 identifier and 125 VDC rating.
• Match the relay to the original AK-50, AK-75, AK-100, or MAGNE-BLAST breaker application where applicable.
• Verify the coil polarity requirements before energization.
• Compare all contact terminals with the original breaker wiring diagram.
• Inspect relay contacts, terminal screws, mounting hardware, and insulating components.
• Confirm that the replacement relay has the same mechanical footprint and actuator orientation.
• Keep control wiring separated from high-energy conductors according to the breaker-panel wiring standard.
• Bond and ground the breaker enclosure according to the site’s switchgear standard.
• De-energize all applicable sources before installing or servicing the relay.

Do not substitute based solely on “125 VDC relay.” Coil voltage is only one compatibility parameter; contact arrangement, mechanical mounting, timing, insulation, and breaker-specific function also matter.

Buyer’s FAQ

Q1. What HS tariff code should be used for 12HGA11J52?

A definitive binding tariff ruling was not located for this exact relay. Since it is an electromechanical auxiliary relay, classification will generally fall within the customs provisions covering relays and electrical control apparatus, but the correct national tariff extension depends on the importing jurisdiction.

Have the importer or customs broker validate the final HS/HTS code before filing. Do not copy a generic PLC or circuit-breaker tariff code simply because the relay is installed inside a breaker.

Q2. What should be declared for Country of Origin?

COO must be supported by traceable evidence. A current supplier record identifies GE as the manufacturer, but the seller’s location or shipment origin does not establish manufacturing origin.

For an audit-controlled shipment, retain the relay nameplate, supplier origin declaration, purchase documentation, and packing-list information together.

Q3. Is shipping insurance appropriate?

For a critical GE breaker spare, insurance can be appropriate. The relay is only about 2 lb, but a damaged or incorrect auxiliary relay can delay restoration of a breaker assembly well beyond the value implied by its physical size.

Use rigid cushioning around the relay housing, protect the terminals, photograph the part before dispatch, and record the actual gross shipment weight.

Q4. Does the 12HGA11J52 contain firmware or require a firmware update?

No. This is an electromechanical relay, not a programmable electronic module. The replacement concern is electrical and mechanical interchangeability rather than firmware level.

The practical acceptance test is to verify the 125 VDC coil, contact arrangement, pickup/dropout behavior where specified, insulation condition, mechanical fit, and correct operation within the original breaker circuit.

Lifecycle & Asset-Control Note

The GE 12HGA11J52 is a legacy HGA 125 VDC auxiliary/control relay associated with GE air-breaker equipment. Current industrial suppliers still list the exact part, while specialist sources also show qualified-part documentation for the catalog number.

For critical switchgear, maintain the relay as an application-specific spare. Record the complete catalog number, breaker model, contact arrangement, coil rating, COO, certification evidence, physical condition, and test result rather than stocking it under the generic description “125 VDC relay.”