Frequently asked questions
What is the replacement for an STR28D, STR38S, or STR58U trip unit in an obsolete MP Masterpact breaker?
FA173583
10 August 2022
Issue:What is the replacement for an STR28D, STR38S, STR58U trip unit in an obsolete MP Masterpact breaker?
Product Line:
Masterpact MP
Resolution:
Replacement trip units come in one model, STR58U, either with or without ground fault. They are available through Schneider Services only (Westchester, OH).
PLEASE NOTE: Most (if not all) of these replacement trip units are obsolete and out of stock. Please consider replacing the cradle, breaker, and trip unit with Masterpact NW or MTZ.
Part number with GFP
M1008H2 for breaker with 800 amp sensor, In=800
M10H2 1000
M1612H2 1200
M16H2 1600
M20H2 2000
M25H2 2500
M3230H2 3000
M32H2 3200
M6340H2 4000
M6350H2 5000
M63H2 6300
Part number without GFP
M1008H2NG for breaker with 800 amp sensor, In=800
M10H2NG 1000
M1612H2NG 1200
M16H2NG 1600
M20H2NG 2000
M25H2NG 2500
M3230H2NG 3000
M32H2NG 3200
M6340H2NG 4000
M6350H2NG 5000
M63H2NG 6300