Schneider 40A 1P MCB Circuit Breaker A9F74140 is an option among MCB automatic circuit breakers at Bashiti Stores, designed to protect circuits from overloads and short circuits. In this model, the rated current is 40 Amps and the number of poles is 1P. These specifications distinguish this model from other alternatives in the same series; match them with your circuit requirements and do not choose a higher amperage breaker just to increase the operating margin.
Practical Benefits
- Combines overload and short-circuit protection functions into a single modular device.
- Distributing protection across independent circuits helps organize the distribution board and identify the affected circuit when a fault occurs.
- Choosing the correct current, number of poles, and tripping curve provides the basis for aligning the breaker with circuit requirements.
Technical Specifications for This Model
| Brand |
Schneider Electric |
| Series |
Acti9 iC60N |
| Model Reference |
A9F74140 |
| Rated Current |
40 A |
| Number of Poles |
1P |
| Tripping Curve |
C |
| Breaking Capacity per Source Title |
6kA according to IEC/EN 60898-1 and 10kA according to IEC/EN 60947-2; check voltage conditions in the manual |
| Dimensions: W x H x D |
18 x 85 x 78.5 mm |
| Mounting Type |
DIN rail |
Who Needs This Product?
Electricians, electrical contractors, homeowners, and shop owners who are setting up a new panel or replacing a breaker that matches the existing circuit. The selection depends on the circuit design, cable cross-section, and wiring method, not just on the type of device or the shape of the breaker.
Installation and Verification Procedure — For Authorized Professionals
The following steps outline general workflow. Refer to the manufacturer's diagram for reference A9F74140 to determine terminals and torque values. Do not perform work on a live circuit.
- The technician must disconnect all power sources, secure them against accidental re-energization, and verify the absence of voltage with an appropriate tool.
- Verify that the device reference, number of poles, current, and voltage match the panel diagram; review conductor cross-sections and protection coordination.
- Mount the device on the rail or its designated position after ensuring compatibility, and identify the supply and load terminals from the manufacturer's diagram for this reference.
- Execute connections using the tightening torque, stripping length, and wire gauges specified in the model's manual; do not carry these values over from a similar device.
- Check the tightness of the connections and mounting, then close the covers and perform the required operational and protection tests before handing over the circuit.
Common Questions Before Buying
Does this breaker protect against earth leakage?
An MCB is designed for overload and short-circuit protection and does not replace the need for earth leakage protection. Check the requirement for an RCCB or RCBO within the panel design.
Should I replace a breaker that trips constantly with one of a higher amperage?
No. You must first identify the cause of the tripping and check the load, cable, and connections. Increasing the amperage without analysis may leave the wires without proper protection.
What is the difference between Amperage and Breaking Capacity?
Amperage is the rated current of the breaker, while breaking capacity describes the level of short-circuit current it can safely interrupt under specified voltage and standard conditions. Neither figure should be substituted for the other.
Order from Bashiti Stores
Learn more in the Electrical Section and Circuit Breakers category. Bashiti Stores — Yousef Bashiti Company, serving individuals, companies, and projects in Jordan. For inquiries about the product or quantities, call 0795756898 or visit our Bayader and Wehdat branches in Amman.
For Comparison Within the Category
Also check out the Schneider 50A 1P MCB Circuit Breaker A9F74150 and compare specifications to choose what suits your needs.
