The Fuji Electric BU-ESB3100 is a 3-pole, 100 Amp molded case circuit breaker (MCCB) designed for 600 VAC industrial electrical distribution and motor protection systems. Part of the discontinued BU series, it provides reliable protection against both overloads and short circuits through a thermal-magnetic trip mechanism. 
Key Technical Specifications
According to documentation from Industrial Parts R Us and IQElectro, the standard specifications for this unit are:
Special Features & Compatibility

Warranty:

We offer a no-DOA guarantee within eBay's return policy timeframe, allowing you to test and inspect the item to 100% satisfaction.

·         Due to the multiple quantities available, you may not receive the item pictured in the ad above. This item is used and in working condition.

 Condition:

   * An item that has been used previously. The item may show some cosmetic wear, but it is fully operational and functions as intended. See the seller’s listing for full details and description of any imperfections.

    * Out of his original package.

    * Be aware that due to the multiple quantities available, you may not receive the item pictured in the ad above.

    * It comes as shown.

    * Please look at the pictures carefully.

    * Do not include additional accessories; only those shown in the photos.     

* ITEM SHIPS AS SHOWN IN THE PHOTO.

 * IF YOU'RE SATISFIED WITH OUR SERVICE, PLEASE ADD ME TO YOUR LIST OF FAVORITE SELLERS AND COME BACK AGAIN!