The Schneider STR28D is an electronic trip unit designed for reliable overcurrent protection within circuit breaker systems. This unit originates from the legacy Merlin Gerin product line, now integrated into Schneider Electric's comprehensive automation portfolio. It provides essential safety functions for electrical distribution and motor control applications, ensuring operational continuity and equipment safeguarding.

Technical details

• Series: STR Trip Unit
• Protection Type: Electronic Overcurrent Protection
• Manufacturer Legacy: Merlin Gerin (now Schneider Electric)
• Functionality: Trip Unit for Circuit Breakers
• Protection Features: Overload and Short-Circuit Protection (verify specific thresholds against manufacturer datasheet)
• Voltage Compatibility: Compatible with specific Schneider Electric circuit breaker frames (verify against manufacturer datasheet for exact model compatibility)
• Current Rating: Dependent on the specific circuit breaker frame it is installed in; consult manufacturer datasheet for details.
• Control Interface: Electronic signaling and trip activation

Applications & compatibility

This STR28D trip unit is commonly integrated into Schneider Electric and legacy Merlin Gerin circuit breakers used in industrial power distribution panels, motor control centers (MCCs), and machinery control systems. Its application spans various sectors including manufacturing, material handling, and process industries where robust and reliable electrical protection is paramount.

Available from Industrial Automation Co as new, refurbished, or surplus stock, backed by a 2-year warranty with same-day shipping on in-stock items. Request a quote for the Schneider STR28D or contact our technical team for cross-reference assistance with compatible Merlin Gerin and Schneider Electric trip units.