EJB34090 - Square D - Molded Case Circuit Breaker
SKU: 66208750585

EJB34090 - Square D - Molded Case Circuit Breaker

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Description

EJB34090 - Square D - Molded Case Circuit BreakerEJB34090 Square D Bolt On Circuit Breaker Schneider Electric Square D's EJB34090 bolt on molded case circuit breaker is a reliable and easy to install device designed for use in Square D NF Panelboards. This circuit breaker is CSA rated, HID rated and HACR rated, and UL Listed as High Intensity Discharge. The EJB34090 is a 3 pole bolt on circuit breaker, rated at 90A at a system voltage of 480Y 277V AC. The circuit breaker has a thermal magnetic trip

EJB34090 - Square D Bolt-On Circuit Breaker

Schneider Electric / Square D's EJB34090 bolt-on molded case circuit breaker is a reliable and easy-to-install device designed for use in Square D NF Panelboards. This circuit breaker is CSA-rated, HID-rated and HACR-rated, and UL Listed as High-Intensity Discharge.

The EJB34090 is a 3-pole bolt-on circuit breaker, rated at 90A at a system voltage of 480Y/277V AC. The circuit breaker has a thermal-magnetic trip unit and a signal indicator to indicate when a trip occurred. The device has a hold current of 270A (the maximum current the breaker can be held at to ensure a trip will occur) and a trip current of 875A (the current value when the breaker is guaranteed to trip).

Square D's EJB34090 circuit breaker is calibrated for 40 degrees C and has aluminum lugs with a terminal lug rating of AWG 12...AWG 6 (aluminum) and AWG 14...AWG 6 (copper).

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SKU: 66208750585

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4.4 ★★★★★
Based on 481 reviews
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Product Reviews
C
Verified Purchase
Carl L. Bradley
Bozeman, US
★★★★★ 1
Kinda flimsy…
Thought the assembly was metal, it’s some kind of PVC.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 22, 2025
D
Verified Purchase
DRJRRT
West Palm Beach, US
★★★★★ 5
Great references book.
Format: Hardcover
Excellent book for medical reference and refresh of knowledge.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 28, 2026
R
Verified Purchase
Ray Schaar
San Leandro, US
★★★★★ 5
A Wonderful Update To A Great Old Reference Book!
Format: Hardcover
It's the Merck Manual! If you know medicine but are aware you don't know EVERYTHING about EVERYTHING! (Few if any do!) This is a wonderful reference. If you have no medical knowledge and think this will make you know what doctors know. Don't waste your money. You have to have a basic understanding for this to be helpful. This is a wonderful update to an old favorite.
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Reviewed in the United States on July 16, 2025
M
Verified Purchase
Majted
Lake Worth, US
★★★★★ 5
The most current and inclusive medical reference available mid-2018.
Format: Hardcover, Format: Hardcover
Here’s the review I wrote for the 19th edition on 2011: I've been getting and using the Merck Manual for over 30 years to answer questions about disease for family and friends (pediatrics through geriatrics) as well as preparing to ask germane questions of physicians responsible for care of family and friends. It is comprehensive in its coverage of the etiology, diagnosis, treatment and prognosis of diseases of the human body and contains the latest research results on the treatment options. It's really not that difficult for the layman to understand the medical terminology and the result is factual understanding of the major aspects of disease which you will NOT get from the standard home health care books from Johns Hopkins, Harvard, Mayo Clinic, the AMA or even the Merck Home Health handbook. And, unlike the Merck Manual, these books directed to the laity do not contain the diagnostic information upon which physicians decide precisely what disease they are presented with. Yes, there will be much superfluous information which you may never use, but, when you want and need the information about a specific disease, here's where you should start your education. The same holds true for the updated 2018 20th edition. I neglected to mention that this manual also contains a plethora of ancillary information including thorough sections on pediatrics, geriatrics, injuries, bites and stings, patient care, alternative medicine, dietary supplements, rehabilitation, normal test values and even legal issues such as advance directives. Yup, it’s pricey, but it’s always proved to be valuable to me.
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Reviewed in the United States on June 15, 2018
L
Verified Purchase
Lisa A.
Massapequa, US
★★★★★ 5
Great reference book
Format: Hardcover
If you only have one medical resource book in your house, I recommend this one. Very thorough book.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 3, 2026

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