Schneider Electric MG24546 Miniature Circuit Breaker
- 63A
- 3 Pole
- DIN Rail
Quantity
Schneider Electric MG24546 - 63A 3 Pole Miniature Circuit Breaker
New
Quantity
Description
Built for demanding industrial applications, the Schneider Electric MG24546 provides robust overcurrent defense. This 63A, 3-pole breaker features a D-curve trip unit, ideal for motor control circuits with high starting currents. The compact device mounts onto standard DIN rails and OEM panels. It accommodates 14-2 AWG wiring and replaces the M9F23363 breaker. With a 10kAIC rating at 240V, it includes positive contact indication and a trip-free mechanism.Specifications
| Brand | Schneider Electric |
|---|---|
| Part Number | MG24546 |
| Series | MG |
| Amperage | 63A |
| Poles | 3 |
| Mounting Style | DIN Rail |
| Voltage | 240VAC, 480Y/277VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC, 5kA @ 480Y/277VAC |
| Terminal Type | Screw/Clamp Terminal |
|---|---|
| For Use With | DIN Rail Enclosures, OEM Panels |
| Wire Gauge | 14-2 AWG |
| Max Wire | 2 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Curve | D |
| Trip Adjustability | Fixed |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Motor Operator, Rotary Handle, Terminal Shields |
|---|---|
| Standards | CSA C22.2 No 235, IEC 60947-2, UL 1077 |
| Approval | CCC, CSA, IEC, UR |
| Temp Rating | -30C to 70C |
| Construction Features | Current Limiting, Reverse Feed |
Product FAQs
7 answersIs the MG24546 suitable for reverse feed applications?
Yes, this breaker is rated for reverse feed applications. Power can be supplied to either the top or bottom terminals without compromising the thermal-magnetic protection mechanism.
What is the trip curve for this circuit breaker?
The MG24546 features a D-curve trip profile. D-curve supplementary protectors are designed to handle high inrush currents, making them ideal for motors, transformers, and other highly inductive loads without nuisance tripping.
Is this device rated as a primary branch circuit breaker?
No, the MG24546 is classified as a UL 1077 Supplementary Protector. It is designed to provide additional protection within appliances or OEM equipment where primary branch circuit protection is already provided upstream.
Does this breaker bolt onto a panelboard bus?
No. While some legacy catalog descriptions may reference a bolt-on design, the MG24546 is a Multi9 series miniature circuit breaker that mounts exclusively to a standard 35mm DIN rail.
Can this part number be found under different manufacturer brands?
Yes, depending on the production year, the MG24546 may be branded as Schneider Electric, Square D, or Merlin Gerin. These are all part of the same corporate family, and the components are electrically and physically identical.
How does the thermal-magnetic trip mechanism operate on this model?
The fixed LI (Long-Time, Instantaneous) trip unit provides two-part protection. A bimetallic element reacts to prolonged overloads by heating up and tripping the breaker, while an electromagnetic coil responds immediately to short-circuit faults.
How should conductors be terminated on this breaker?
The breaker features screw clamp terminals that accept 14 to 2 AWG wire. Installers must apply the specific torque value printed on the side of the breaker to ensure a secure connection and prevent thermal issues under load.
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