Eaton Cutler Hammer NG3900 900A 3P Molded Case Generator Circuit Breaker – Bolt-On – 600VAC
SKU: 82445249172

Eaton Cutler Hammer NG3900 900A 3P Molded Case Generator Circuit Breaker – Bolt-On – 600VAC

$4769.55 $5299.50
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Description

Eaton Cutler Hammer NG3900 900A 3P Molded Case Generator Circuit Breaker – Bolt-On – 600VACThe Eaton NG3900 is a high capacity molded case generator circuit breaker designed for precise protection of generators and industrial power systems. Featuring an NG frame style with an electronic interchangeable trip unit, it offers a 12505000A adjustable trip range, providing reliable protection against overloads and short circuits. This model comes with standard terminals and robust interrupting ratings across multiple voltages, ensuring safe and

The Eaton NG3900 is a high-capacity molded case generator circuit breaker designed for precise protection of generators and industrial power systems. Featuring an NG frame style with an electronic interchangeable trip unit, it offers a 1250–5000A adjustable trip range, providing reliable protection against overloads and short circuits. This model comes with standard terminals and robust interrupting ratings across multiple voltages, ensuring safe and dependable operation in demanding electrical applications.

Product Specifications

• Manufacturer: Eaton / Cutler Hammer
• Frame Type: NG
• Breaker Type: Molded Case Generator Circuit Breaker
• Trip Unit: Electronic Interchangeable
• Trip Range: 1250–5000A
• Amperage: 900A at 40°C
• Poles: 3
• Mounting Type: Bolt-On
• Standard Lug Type: With Terminals Standard

Technical Specifications

• Interchangeable electronic trip unit for flexible protection
• Adjustable thermal-magnetic trip settings
• Suitable for generator and industrial applications
• Supports accessory installation at no additional cost
• One-year manufacturer warranty

Voltage and Ratings

• Voltage: 600VAC
• Frequency: 50/60 Hz
• Interrupting Ratings: 18 kA @ 240VAC, 14 kA @ 480VAC, 10 kA @ 600VAC
• Rated Current: 900A at 40°C

Product Data

• Series: NG Frame
• Poles: 3
• Mounting: Bolt-On
• Typical Applications: Generator protection, industrial switchgear, power distribution systems

Important Note

This product image represents a base model for identification purposes only. If purchasing accessories with the breaker, Eaton will install them according to your specific configuration requirements at no additional cost. Please provide all necessary instructions in the order comment box during checkout to ensure proper installation and compatibility.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 82445249172

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4.1 ★★★★★
Based on 274 reviews
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Product Reviews
C
Verified Purchase
cryomerlin
Grantham, US
★★★★★ 4
It works but not so sure about the EMI/RFI noise filtering claim
Color: Black, Size: 8 Outlet, Style: Outlets Only
I only buy surge protectors that have EMI/RFI noise filtering. I have a sensitive short wave radio with a sleep timer that I use when going to sleep. It has a rechargeable battery so you can either use it plugged in or on battery power. I've always had static on the radio when it was plugged into this surge protector. Cords generally do cause interference in radios so I thought nothing of it. But it started to get really bad. So I took one of my old tripplite surge protectors with emi/rfi noise filtering and plugged the radio into that. No static or interference on the radio at all. I went to APC's website to see if this model has EMI/RFI and it looks like it does....but it sure doesn't work well on mine. I don't want to disparage APC. I have several of their surge protectors. Just bought the big P12U2 model they have and love that one. I think it just has better circuitry than this budget model. I'm using the P12U2 on my TCL 55" TV that was flickering and was glitchy turning on and off with a different surge protector from another company. Anyways, the ACP P12U2 works great and appears to have excellent noise filtering. Just wish the P12U2 had a flat plug because I bought it to use for my computer, but couldn't because I couldn't push my desk up against the wall with that straight out plug. Anyways, I've strayed. This is a good basic surge protector I suppose. Would not recommend it for sensitive electronics prone to interference. Then again, maybe I just had a bad one, who knows. APC is a great brand. All my surge protectors are either APC or TrippLite. Can't go wrong either way.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 28, 2022
A
Verified Purchase
Amazon Customer
Draper, US
★★★★★ 5
Great surge protector
4 years later and still working as intended.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 22, 2026
S
Verified Purchase
Savvy Shopper
Louisville, US
★★★★★ 5
It Works
This works fine. Good size. Good enough cord length. Does what a power strip should do.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 21, 2025
M
Verified Purchase
Mani's World
Dallas, US
★★★★★ 5
Great for multiple adapters
Color: Black, Size: 8 Outlet, Style: Outlets Only
One of the common flaws of single width strips is the inability to accommodate more than 1 adapter unless you want to waste the sockets as the adapter obstructs/covers the adjacent sockets. This one has 2 rows with sockets at 90 degrees. As such, adapters face outward and do not obstruct adjacent sockets. Well made and sturdy, typical of APC quality. Hopefully the surge protection won't be tested but gives you peace of mind to know that all plugged in devices are protected. I have it mounted under my office desk using the mounting holes at the back. Great value for the money.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 18, 2022
H
Verified Purchase
Henry
San Leandro, US
★★★★★ 5
A household staple
Style: Data/Line Protection - 12 ft
I use this power strip for both my computer and entertainment setup, and it has been very reliable. The seven outlets give me enough room for everything without having to use multiple strips. The cord is long enough to reach the wall easily while keeping things neat. It sits flat on the floor and does not tip over when everything is plugged in. The layout of the outlets makes it easy to plug in larger adapters without blocking others. It has already gotten a lot of use and should give me plenty more for years to come.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 13, 2025

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