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Both Schneider CVS100B and CVS100F are 100A frame molded case circuit breakers in the EasyPact CVS series.
The core differences lie in the breaking capacity class and application scenarios.
- Core Parameter Comparison (415V AC)
| Item | CVS100B | CVS100F | Key Difference |
| Ultimate Short‑Circuit Breaking Capacity (Icu) | 25kA | 36kA | Type F is 44% higher, with stronger short‑circuit withstand capability |
| Service Short‑Circuit Breaking Capacity (Ics) | 25kA (100% Icu) | 36kA (100% Icu) | Same ratio as Icu; Type F is more suitable for harsh short‑circuit environments |
| Ics at 440V | 15kA | 18kA | Type F maintains better breaking performance at higher voltages |
| Rated Current Range | 16–100A | 16–100A | Same; both support TM‑D thermal‑magnetic releases |
| Pole Configurations | 3P/3d, 4P/4d/3d | 3P/3d, 4P/4d/3d | Same protective pole configuration |
| Release Type | TM‑D (Thermal‑Magnetic), ETS (Electronic) | TM‑D (Thermal‑Magnetic), ETS (Electronic) | Same basic protection functions |
| Mounting Type | Fixed, Plug‑in | Fixed, Plug‑in | Same mounting compatibility |
| Wiring Type | Front wiring / Rear wiring | Front wiring / Rear wiring | Same wiring flexibility |
- Analysis of Key Differences
- Breaking Capacity Class (Most Important Difference)
Type B (Basic): 25kA breaking capacity, suitable for general industrial and commercial buildings and conventional power distribution systems with low short‑circuit current.
Type F (High): 36kA breaking capacity, suitable for high short‑circuit current applications, such as near transformers, frequent starting of large motors, or heavy‑duty industrial environments.
- Application Selection
| Model | Recommended Applications | Unrecommended Applications |
| CVS100B | Commercial buildings, small factories, civil distribution, secondary distribution | Large industrial plants, near generators/transformers, systems with shortircuit current >25kA |
| CVS100F | Heavy industry, large motor circuits, primary distribution, near power source | Simple distribution systems with budget constraints and short ircuit current <25kA |
- Other Minor Differences
Price: Type F is normally more expensive than Type B (approx. 10–20%) due to higher breaking capacity.
Internal Structure: Type F uses a reinforced arc extinguishing system and contact design to withstand higher short‑circuit energy.
Accessory Compatibility: Both are compatible with the same accessories, including auxiliary contacts, shunt / undervoltage releases, Vigi earth leakage modules, etc.
- Selection Guide
- Calculate system short‑circuit current: Calculate the expected short‑circuit current based on transformer capacity and line impedance, and select a model with breaking capacity ≥ the calculated value.
- Evaluate power supply environment: Prefer Type F when close to transformers or large loads; Type B can be used for secondary / tertiary distribution with low short‑circuit current.
- Consider future expansion: Reserve 10–20% margin for short‑circuit current to avoid insufficient breaking capacity after system expansion.
- Budget balance: Type B reduces cost when safety requirements are met; Type F is recommended for critical circuits to improve reliability.
- Additional Notes
Both models comply with IEC 60947‑2 and provide overload and short‑circuit protection.
The TM‑D thermal‑magnetic release has adjustable overload protection (Ir) and short‑circuit instantaneous protection (Im) to match different load characteristics.
The ETS electronic release provides more precise protection and additional functions (e.g. earth fault, overload alarm), available for both models.
