Black Box 1-800-316-7107 


Helping you is our priority at Black Box.

We're committed to providing the best customer service in the industry. We're here for you, 24/7, 365.

We'll call you

A technical expert will call you shortly.

Submit Connecting call...

Call Us

Customer Sales & Service Support

Black Box Brand Product Support

IT Services & Voice Support

Send us a FAX


Eaton Maintenance Bypass Switch - 125-Amp, 21"Hx14"Wx6.8"D

Enables you to swap a UPS without power interrruption.


Limited Quantity In Stock
Typically Ships within One Week
2 Year Double Diamond™ Warranty (Standard)

*Required field

Product Features

  • This wallmount, hardwired, make-before-break switch ensures electrical continuity when servicing or testing a UPS.
  • Compatible with the Eaton PW9170 UPS.


This make-before-break switch ensures electrical continuity while servicing a UPS by connecting the load to AC power before disconnecting it from the UPS. The Maintenance Bypass Switch is intended for hardwired installation.

Tech Specs

cUL 0
UL 0
Size 21"H x 14"W x 6.8"D (53.3 x 35.6 x 17.3 cm)
Warranty 2 years
Weight 35 lb. (15.9 kg)

* Technical specification weight is the unit weight. It is not the packaged shipping weight. For shipping weight, please contact Black Box customer service at 877-877-2269.


Double Diamond Warranty Diamond

Double Diamond™ Warranty (Standard)

Take the risk out of equipment purchases with the Double Diamond™ Warranty from Black Box Network Services.

The Double Diamond Warranty is our warranty that protects your Black Box® brand products* from accidental damage, including drops, water, and power surges.

The Maintenance Bypass Switch, 125-Amp, 21"Hx14"Wx6.8"D comes with a standard 2 Year Double Diamond™ Warranty (Standard) already included.

During the warranty period, Black Box Network Services will repair or replace your damaged equipment within one week of receipt at NO CHARGE!*

Plus, get an Extended Double Diamond Warranty.

You can also extend your warranty or protect a previously purchased Black Box® brand product** for an additional year—for only 10% of the purchase price! Or, extend your coverage for a full three years for only 20% of the purchase price!

Ordering an extended warranty is easy: When viewing a product in your shopping cart, just select the one or three years of additional coverage in the dropdown menu under “Warranty Options.” For details, contact Customer Service at 724-746-5500.

* Warranty subject to certain exclusions and limitations ** Certain products may not be eligible.

What’s more, we also have a 45-day return policy. Simply call Customer Service for a Return Authorization (RA) number, return your product in new condition and in the original package, and receive a full refund.