Schneider Contactor NG125H (18728) 40AMP 3P is an electrical component of the panel or control circuit: it conducts, switches, protects or signals inside the system.
In electrical work 90 % of faults sit in the joint, not in the part. A loose terminal, a bad crimp or chafed insulation produce intermittent faults that no new component will cure.
Specifications and compatibility
- Brand
- SCHNEIDER ELECTRIC
- Electrical type
- Contactor
- Amperage
- 40 A
- Pole
- 3P
How to verify before ordering
- Match voltage, current and conductor cross-section to what the circuit demands.
- Check the connection type (screw, spring, crimp) and terminal gauge.
- Confirm the IP rating if the part sits in an exposed area of the panel.
- Declared make or line: SCHNEIDER ELECTRIC. If your equipment carries another make, the part may not be equivalent.
Frequently asked questions
Why does a terminal get hot?
Contact resistance: too little clamping area or a bad crimp. The heat oxidises the joint and worsens it until the circuit opens.
Can I fit a relay with a higher amp rating?
You can, and it is often good practice, provided coil voltage and contact arrangement match. Never fit one with a lower rating.
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See the spare parts catalogue or request a quotation quoting the equipment reference. Third-party trademarks are cited for identification purposes only.
Specifications
| Characteristics | |
|---|---|
| Amperage (A) | 40 A |
| Brand | SCHNEIDER ELECTRIC |
| Pole | 3P |
| Electrical power | |
|---|---|
| Electrical | Contactor |