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 for Eaton MDL & HMDL Circuit Breakers
If you're working with Eaton MDL or HMDL circuit breakers and need a solid trip unit that gets the job done, the Eaton MT3300T is a no-brainer. Rated at 300 amps, this thermal-magnetic trip unit offers dependable circuit protection without taking up a ton of space. It’s designed to fit neatly into J-K frame breakers, making it a smart choice whether you’re upgrading an existing setup or building a new one from scratch.
Key Features and Benefits
- Reliable Protection: With thermal-magnetic trip technology, this unit reacts quickly to overloads and short circuits—helping you avoid costly downtime or damage to your system.
- Tailored Compatibility: Built specifically for Eaton’s MDL and HMDL breakers, so you know it’ll fit and function exactly how it should.
- Compact but Capable: It’s not bulky, but don’t let the size fool you—it handles 300 amps like a champ.
- Easy to Work With: Designed for professionals who want performance without the hassle. Quick to install and built to last.
Technical Specifications
- Type: Thermal-magnetic trip unit
- Amperage Rating: 300A
- Frame Compatibility: J-K frames
- Breaker Compatibility: Eaton MDL and HMDL
- Poles: 3-pole configuration
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Dimensions:
- Depth: 7″
- Height: 4″
- Width: 4″
- Weight: 3 lbs
- Series: C
Material Compliance and Certifications
- This trip unit is UL Listed, so it meets the industry’s top safety and performance standards. Manufactured under Eaton’s strict quality controls, you’re getting a unit that’s been built for real-world conditions, not just a spec sheet.
Where It Works Best
- The MT3300T is right at home in commercial buildings, manufacturing plants, and institutional facilities—basically anywhere you need dependable, high-capacity circuit protection. It’s a great fit for power distribution systems that require consistent, reliable performance. Just remember: this is the trip unit only, so you’ll need a matching breaker frame to complete the setup.
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. All trademarks and registered trademarks are the property of their respective owners.
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.
Returns are easy
You may return unused items within 30 days of delivery for a full refund.
FREE shipping on breaker orders over $100 and all other items with orders over $500.
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Same Day Shipping
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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).