JT3090T - 90Amp Trip Unit Description
JT3090T - 90Amp Trip Unit
The Eaton JT3090T is a 90A, three-pole thermal-magnetic trip unit for compatible Series C molded-case circuit breaker equipment. Eaton identifies it with a T185 trip type, JT circuit breaker type, and Frame J-K designation—details that are particularly useful when you're trying to replace a trip unit already in service. The JT3090T is built to last and provides a clearly identified option for form, fit, and functional replacement in compatible existing and legacy Series C equipment. Keep in mind that this product is a trip unit accessory, not a complete circuit breaker.
Key Features and Benefits
- 90A current rating for equipment requiring this specific trip-unit amperage.
- Three-pole design matches compatible three-pole breaker configurations.
- Thermal-magnetic trip technology as specified by Eaton.
- T185 trip type provides an important identifier for replacement matching.
- Intended for JT circuit-breaker-type compatibility.
- Frame J-K designation helps narrow the compatibility check for existing equipment.
- UL Listed according to the manufacturer's specifications.
Technical Specifications
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Catalog Number: JT3090T
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Manufacturer: Eaton
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Product Name: Molded Case Circuit Breaker Accessory Trip Unit
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Product Type: Molded Case Circuit Breaker Accessory
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Type: Trip Unit
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Series: Series C
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Amperage Rating: 90A
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Number of Poles: 3
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Trip Technology: Thermal-Magnetic
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Trip Type: T185
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Circuit Breaker Type: JT
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Frame Size: Frame J-K
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Product Width: 4.3 in.
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Product Height: 5.4 in.
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Product Length / Depth: 7.0 in.
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Product Weight: 1.3 lb
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UPC: 786679404102
Material Compliance and Certifications
The JT3090T is UL Listed based on the supplied Eaton product specifications. For other compliance requirements, Eaton's published information states: Contact Manufacturer. No additional material-compliance certifications should be assumed without supporting manufacturer documentation.
Where It Works Best
The Eaton JT3090T is suited to compatible existing and legacy Series C molded case circuit breaker equipment that calls for a 90A, three-pole thermal-magnetic trip unit, T185 trip type, JT circuit breaker type, and Frame J-K configuration. Those identifiers should be checked together when evaluating a replacement.
Because the JT3090T is a trip unit accessory rather than a complete molded case circuit breaker, verify the catalog number, amperage, number of poles, breaker type, frame designation, trip type, dimensions, and other equipment requirements before installation. This approach keeps the replacement decision focused on the correct form, fit, and function for the existing assembly.
Use of Original Equipment Manufacturer (OEM) trademarks, names, and logos is for informational and identification purposes only. This does not imply any affiliation, sponsorship, endorsement, or approval by the original equipment manufacturer. CIRCUIT BREAKER SUPERSTORE® is an independent reseller and is not an authorized distributor, affiliate, or representative of any manufacturer. Manufacturer warranties do not apply unless expressly stated. All trademarks and registered trademarks are the property of their respective owners.
Eaton®, Cutler-Hammer®, Westinghouse®, Challenger®, Bussmann®, Edison®, Edison Fuse®, GTE Sylvania®, Crouse-Hinds®, and Cooper® are registered trademarks of Eaton Corporation plc. Products sold are surplus, used, or refurbished and are NOT supplied by Eaton Corporation plc or its affiliates.
Specifications
- Width:2.88
- Height:3.75
- Depth:3.31
- Poles:3
- Amperes:90
- A.I.C. Rating & Volts:600VAC
- Type:JT
- Sub-Category:TRIP UNIT
- Approx Dimensions:2.88"W x 3.75"L x 3.31"D
- Additional Notes:Thermal Magnetic Only for JD, HJD & JDC Frames. Magnetic Trip Adjustable 5-10 Times Continuous Ampere Rating. - discontinued by the Manufacturer
Returns are easy
You may return unused items within 30 days of delivery for a full refund.
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CIRCUIT BREAKER SUPERSTORE® provides a limited 1-year warranty on both new and reconditioned products. Rest assured, all products are authentic OEM (original equipment manufacturer).



