AC-PRO-MP Protection Unit for Masterpact M

AC-PRO-MP Protection Unit for Masterpact M

Our engineers have undergone extensive training, allowing us to attend your site to install this AC-PRO-MP replacement trip unit.

SKU AC-PRO-MP Category

Fast Shipping with DHL

Worldwide delivery

Lead time: 5 days


AC-PRO-MP®(-MP-II) is a plug-in, direct replacement trip unit for ST and STR trip units on Schneider Electric, Square D, and Merlin Gerin Masterpact M and MP breakers, as well as other rebranded versions such as the Moeller IZM. AC-PRO-MP®(-MP-II) is user programmed to replace any version of STR-18M, 28D, 38S, 58U, or 68U* trip units on IEC or UL rated breakers.

AC-PRO-MP®(-MP-II) has the same protective functions, settings, and time current-curves as the original ST or STR.

The original features of the STR trip unit are still provided:
• LSIG protection
• Instantaneous on Closing (DINF)
• Over Temperature Trip
• Time-Current Curves (TCC)
• Information and Alarms

Additional advanced features include:
• Patented QUICK-TRIP® arc flash mitigation
– QUICK-TRIP® on/off switch is easily accessible on the face of the trip units
– QUICK-TRIP® instantaneous and ground fault settings are standard for arc flash reduction
• Patented Sluggish Breaker® detection
– Helps determine if breaker mechanism needs service
• Date and time stamp of trip events
• No rating plug required
– The required rating plug value is a programmed setting
• Neutral Overload Protection

Additional information


URC Relay Company


Masterpact M Moeller IZM

Protection Type



There are no reviews yet.

Be the first to review “AC-PRO-MP Protection Unit for Masterpact M”

Your email address will not be published. Required fields are marked *

How long does international shipping take?

Shipping times may vary depending on your location and the shipping method chosen. Generally, international orders arrive within 7-14 business days. We also offer expedited shipping options for faster delivery.

Yes, we provide tracking information for all international orders. Once your order is shipped, you will receive a tracking number, allowing you to monitor its progress until it reaches you.

Yes, we offer discounts for bulk and wholesale orders. Contact our sales team to discuss your specific requirements and receive a personalized quote.