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- Model Breakdown
| Code | Description |
| A9F18325 | Official order number for Schneider Electric Acti9 iC65N Miniature Circuit Breaker |
| IC65N | Product series: Acti9 iC65 series, N-type breaking capacity (6kA), thermal-magnetic trip unit |
| 3P | Number of poles: 3 poles (3-phase 3-wire), can switch off three phases simultaneously |
| C25A | C-curve tripping, rated current 25A (at 30°C) |
- Key Technical Parameters
| Item | Specification |
| Brand | Schneider Electric |
| Product Series | Acti9 iC65N |
| Type | Miniature Circuit Breaker (MCB), thermal-magnetic trip |
| Rated Current | 25A (at 30°C) |
| Poles | 3P (3 protective poles) |
| Tripping Curve | C-curve (instantaneous trip at 5–10In, for distribution and lighting circuits) |
| Breaking Capacity | 6kA (compliant with IEC/EN 60898-1) |
| Rated Voltage | 400V AC (3-phase), 230V AC (single-phase) |
| Rated Frequency | 50/60Hz |
| Mounting | 35mm standard DIN rail mounting |
| Ambient Conditions | Temp: -25°C ~ +40°C, altitude ≤2000m, humidity ≤95% (non-condensing) |
| Protection | Overload protection (thermal trip) and short-circuit protection (magnetic trip) |
- Product Features
- High Reliability: Thermal-magnetic tripping provides accurate overload and short-circuit protection
- Modular Design: Compact size, saves panel space, easy installation and maintenance
- Wide Application: For all low-voltage distribution systems: residential, commercial and industrial
- Certifications: Complies with IEC/EN 60898-1, GB10963.1 and other international & national standards
- Long Service Life: Mechanical life ≥20,000 operations, electrical life ≥5,000 operations
- Applications
3‑phase distribution systems: Overload and short-circuit protection for 3‑phase circuits
Lighting circuits: 3‑phase lighting protection in large commercial buildings and industrial plants
Power equipment: Control and protection of small 3‑phase motors, pumps, fans, etc.
Distribution boards / cabinets: Main or branch switch for low-voltage distribution systems
- Replacement Models & Cross-Brand Comparison
5.1 Schneider Same-Series Replacements
| Model | Difference | Application Change |
| A9F18320 | 20A, C-curve, 3P | For lower load current |
| A9F18332 | 32A, C-curve, 3P | For higher load current |
| A9F19325 | 25A, D-curve, 3P | For inductive loads such as motors |
| A9F18225 | 25A, C-curve, 2P | Single-phase circuit protection |
- Installation & Usage Notes
- Before installation, confirm model matches system parameters: check rated current, poles and tripping curve
- Must be mounted on standard 35mm DIN rail for secure installation
- Ensure terminals are tightly connected to avoid overheating
- Inspect breaker status regularly to ensure proper tripping mechanism
- After a fault trip, eliminate the cause before manually resetting
- Selection Recommendations
- C-curve is suitable for distribution and lighting circuits; not recommended for frequent-start motors (use D-curve)
- 3P breakers are for 3-phase 3-wire systems; use 4P if neutral protection is required
- 6kA breaking capacity is for general industrial & commercial buildings; use higher-rated types (e.g. H-type 10kA) for high short-circuit current
Recommended Replacements for A9F18325-IC65N-3P-C25A
- Direct Replacements (Schneider Electric)
| Replacement Model | Order No. | Key Parameters | Difference | Application |
| IC65N 3P C25A | A9F18325 | 3P, C25A, 6kA | Identical, original | Same distribution protection |
| IC65N 3P C20A | A9F18320 | 3P, C20A, 6kA | 20A (lower) | 3-phase lighting / distribution with lower load |
| IC65N 3P C32A | A9F18332 | 3P, C32A, 6kA | 32A (higher) | 3-phase lighting / distribution with higher load |
| IC65N 3P D25A | A9F19325 | 3P, D25A, 6kA | D-curve (10–14In trip) | 3-phase motors, compressors and inductive loads |
| IC65H 3P C25A | A9F28325 | 3P, C25A, 10kA | 10kA (higher breaking capacity) | Industrial environments with high short-circuit current |
| IC65L 3P C25A | A9F38325 | 3P, C25A, 15kA | 15kA (highest level) | Critical power systems with very high fault current |
| IC65N 4P C25A | A9F18425 | 4P, C25A, 6kA | 4 poles (includes neutral protection) | 3-phase 4-wire systems |
- Upgraded Replacements (New Schneider Series)
| Series | Model | Order No. | Upgrade Advantage | Application |
| Acti9 IC60N | IC60N 3P C25A | A9F58325 | More compact, higher short-circuit withstand | New projects with limited panel space |
| Acti9 IC40N | IC40N 3P C25A | A9P58325 | Ultra-slim (18mm/pole), space-saving | Small distribution boards, residential / commercial |
- Cross-Brand Equivalent Replacements
| Brand | Model | Key Parameters | Match | Cost |
| ABB | S203-C25 | 3P, C25A, 6kA | ★★★★★ | Medium, reliable quality |
| Siemens | 5SY6325-7CC | 3P, C25A, 6kA | ★★★★★ | Medium, German quality |
| CHINT | NXB-63-3P C25 | 3P, C25A, 6kA | ★★★★☆ | Lower, high-quality domestic |
| Delixi | CDM30s-63C25/3300 | 3P, C25A, 6kA | ★★★★☆ | Lower, cost-effective |
| Changshu Switch | CH1-63C25/3P | 3P, C25A, 6kA | ★★★★☆ | Lower, well-known domestic brand |
| Liangxin | NDM1-63C25/3P | 3P, C25A, 6kA | ★★★★☆ | Lower, suitable for industry |
Key Selection Advice for Replacements
- Direct equivalent: Prefer IC65N 3P C25A (A9F18325) to match original protection characteristics
- Tripping curve:
C-curve (5–10In): distribution & lighting
D-curve (10–14In): motors, transformers to avoid nuisance tripping
- Breaking capacity:
6kA (N-type): general commercial & residential
10kA (H-type): industrial & large commercial
15kA (L-type): critical systems with high fault current
- Poles:
3P: 3-phase 3-wire (no neutral protection)
4P: 3-phase 4-wire (phase + neutral protection)
- Brand choice:
International (ABB, Siemens): stable, for critical equipment & export projects
Domestic (CHINT, Delixi): cost-effective, for general industrial & civil projects
