KT3225T - 225Amp Trip Unit



- 225 Amp
- 600VAC
- 3 Pole
Purchase Options: New In Box
KT3225T - 225Amp Trip Unit Description
KT3225T - 225Amp Trip Unit
When you’re replacing a trip unit in equipment that’s already on the job, the KT3225T gives you several specific details to work from. It’s a 225-amp, three-pole T266 trip unit identified for compatible Series C J-K frame molded case circuit breaker applications. One distinction matters right away: the KT3225T is the trip unit itself, not a complete circuit breaker. That makes the existing assembly and its documentation an important part of the selection process.
Key Features and Benefits
- 225-amp rating: Suited to applications specifically calling for a 225A trip unit.
- Three-pole configuration: Matches compatible three-pole breaker assemblies.
- T266 trip type: A useful identifier when comparing the unit with an existing component.
- J-K frame: Specified for compatible J-K frame applications.
- Series C designation: Another key detail to check when sourcing a replacement for existing equipment.
- Trip unit accessory: This component is a trip unit and should not be confused with a complete molded case circuit breaker.
Technical Specifications
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Catalog Number: KT3225T
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Product Type: Molded Case Circuit Breaker Accessory
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Component: Trip Unit
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Trip Type: T266
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Amperage Rating: 225A
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Number of Poles: 3
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Frame Size: J-K
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Series: Series C
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Length/Depth: 6.9 in.
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Width: 4.3 in.
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Height: 5.3 in.
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Weight: 1.9 lb
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UPC: 786679266052
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Certification: UL Listed
Material Compliance and Certifications
The supplied specifications identify the KT3225T as UL Listed. Material-compliance information is given only as “Contact Manufacturer.” No specific RoHS, REACH, or similar material-compliance designation was provided, so do not assume those details.
Where It Works Best
The KT3225T makes the most sense when maintaining existing or legacy Series C molded case circuit breaker equipment that requires a 225A, three-pole T266 trip unit for a J-K frame application.
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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:3.5
- Height:5.13
- Depth:3.88
- Poles:3
- Amperes:225
- A.I.C. Rating & Volts:600VAC
- Type:KT
- Sub-Category:TRIP UNIT
- Approx Dimensions:3.50"W x 5.13"L x 3.88"D
- Additional Notes:Thermal Magnetic Only for KD, HKD & KDC 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).

