MT3300T - 300 Amp Trip Unit
- 300 Amp
- 600VAC
- 3 Pole
Purchase Options: New In Box
MT3300T - 300 Amp Trip Unit Description
MT3300T - 300 Amp Trip Unit
The MT3300T trip unit is a 300-amp, three-pole molded case circuit breaker accessory designed for use with Type MDL and HMDL breakers. Part of the Series C family and specified for J-K frame applications, the MT3300T uses a T266 trip type and provides the form, fit, and functional characteristics needed when you're maintaining compatible existing electrical equipment. For electricians, maintenance teams, and facility personnel working with legacy breaker systems, those compatibility details matter: the catalog number, breaker type, frame size, amperage, pole configuration, and trip type should all match the requirements of the existing equipment.
Key Features and Benefits
- 300A amperage rating: Matches applications requiring a 300-amp trip unit within the specified breaker family.
- Three-pole configuration: Provides the required pole arrangement for compatible three-pole equipment.
- T266 trip type: A critical identification point when matching the trip unit to the existing circuit breaker.
- MDL and HMDL breaker compatibility: Specifically identified by the manufacturer for use with Type MDL and HMDL breakers.
- J-K frame size: Helps narrow compatibility and prevents relying on amperage alone when selecting a replacement.
- Series C: Identifies the product series for accurate form, fit, and functional matching.
Technical Specifications
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Catalog Number: MT3300T
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Product Type: Molded Case Circuit Breaker Accessory
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Type: Trip Unit
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Amperage Rating: 300A
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Number of Poles: 3
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Trip Type: T266
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Compatible Breaker Types: MDL and HMDL
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Frame Size: J-K Frame
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Series: Series C
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Product Length/Depth: 7 in.
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Product Height: 4 in.
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Product Width: 4 in.
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Product Weight: 3 lb.
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UPC: 782114350430
Material Compliance and Certifications
The MT3300T is UL Listed according to the manufacturer's published specifications. The manufacturer's compliance field states "Contact Manufacturer," so do not assume additional compliance or material declarations without further documentation.
Where It Works Best
The MT3300T 300A trip unit is for existing electrical equipment using compatible Type MDL or HMDL molded case circuit breakers where the application calls for a 300A, three-pole, T266 trip unit in a Series C J-K frame configuration. This makes the exact catalog number and breaker family especially important when replacing an existing trip unit; a similar amperage rating by itself does not establish compatibility.
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:3.75
- Height:7.5
- Depth:3.38
- Poles:3
- Amperes:300
- A.I.C. Rating & Volts:600VAC
- Type:MT
- Sub-Category:TRIP UNIT
- Approx Dimensions:3.75"W x 7.5"L x 3.38"D
- Additional Notes:Thermal Magnetic Only for MDL & HMDL 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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