Overview
The Square D MG24432 is a UL 1077 recognized supplementary protector from Schneider Electric’s Multi 9 C60 family of miniature circuit breakers. Rated for 10 amperes at 277 VAC (single-pole configuration), this compact DIN rail mount breaker delivers reliable thermal-magnetic overcurrent protection for low-power electronic circuits, control equipment, and branch protection applications. The C-curve trip characteristic suits typical loads with moderate inrush currents.
Key Features
- UL 1077 recognized supplementary protector with C-curve overcurrent response (7–10× ampere rating)
- Single-pole, DIN rail mount design—only 0.35 inches (9 mm) wide per pole for compact panel layouts
- 10 ampere rated current; rated voltage up to 277 VAC (or 65 VDC for DC applications)
- Thermal-magnetic trip-free mechanism with positive contact-disconnect indication
- Suitable for reverse feeding; compatible with standard Schneider Electric Multi 9 electrical and mechanical accessories
- Compact form factor allows multiple units per DIN rail; endurance rated for 10,000 operation cycles
Technical Specifications
- Part Number: MG24432
- Manufacturer: Schneider Electric (Square D)
- Rated Current: 10 A
- Voltage Rating (AC): 277 VAC (1-pole)
- Voltage Rating (DC): 65 VDC
- Poles: 1 (single-pole)
- Trip Curve: C (7–10× ampere rating)
- Interrupting Capacity: 5 kA
- Certifications: UL 1077, CSA C22.2 No. 235
- Mounting: DIN rail (35 mm)
- Module Width: 0.35 inches (9 mm)
- Operating Temperature: −25°C to +60°C (standard)
- Mechanism: Thermal-magnetic, trip-free
- Terminal Type: Box lug (standard); ring terminal options available
Typical Applications
The Square D MG24432 is designed as a supplementary protector for overcurrent protection within appliances, industrial control equipment, and low-voltage electronic circuits where branch circuit protection is already provided or not required. It is commonly used in:
- Control panel protection for PLCs, drives, and automation systems
- Appliance branch circuits and sub-panel protection
- Equipment manufacturer original equipment (OEM) applications
- Industrial and commercial 277 VAC lighting or heating circuits in systems with moderate inrush
- Telecommunications and DC power distribution (65 VDC rating)
Compatibility & Replacements
Compatible With
- 35 mm DIN rail systems (standard industrial mounting)
- Schneider Electric Multi 9 C60 accessory range (auxiliary switches, alarm switches, shunt trips, undervoltage releases)
- Standard Schneider Electric ring terminal kits and box lug terminal connections
- Industrial appliances and OEM control circuits rated 277 VAC or lower
- Panel boards and enclosures with standard DIN rail provision
Replaces / Drop-In Replacement For
The MG24432 is replaced by the M9F22110 Multi 9 C60SP (10 A, C-curve, 277 V, 10 kA rating, end of life effective January 1, 2017). For exact interchangeability in legacy equipment, verify mechanical fit and electrical compatibility before installation. The M9F22110 offers higher interrupting capacity (10 kA versus 5 kA) and identical electrical ratings.
Works With
- Suitable for use as supplementary protectors in appliances or electrical equipment where branch circuit protection is already provided
- Schneider Electric control system platforms and industrial automation enclosures
- Standard electrical sizing and coordination software using UL 1077 supplementary protector curves
- IEC 60947-2 rated systems (international equivalent standard)
