📊 Detailed Explanation of Core Parameters of A-Series Contactors:
A9 - A38 (low current specification)
| Model | AC-3 Rated current (380/400V) | Corresponding motor power (380/400V) | Agreed heating current Ith | Recommended fuse (gG) | Electrical life (×10⁶ cycles) | ||||||
| A9 | 9 A | 4 kW | 20 A | 25 A | 1.0 | ||||||
| A12 | 12 A | 5.5 kW | 25 A | 25 A | 1.0 | ||||||
| A18 | 18 A | 7.5 kW | 25 A | 32 A | 1.0 | ||||||
| A26 | 26 A | 11 kW | 32 A | 32 A | 1.0 | ||||||
| A30 | 32 A | 15 kW | 50 A | 63 A | 0.8 | ||||||
| A38 | 38 A | 18.5 kW | 50 A | 63 A | 0.8 |
| A40 - A96 (Medium current specification) | |||||
| Model |
AC-3 Rated current (380/400V) |
Corresponding motor power (380/400V) | Conventional heating current Ith | Recommended fuse (gG) | Electrical life (×10⁶次) |
| A40 | 40 A | 18.5 kW | 60 A | 63 A | 0.8 |
| A50 | 53 A | 22 kW | 80 A | 100 A | 0.8 |
| A65 | 65 A | 30 kW | 110 A | 125 A | 0.8 |
| A75 | 80 A | 37 kW | 120 A | 125 A | 0.6 |
| A95 | 96 A | 45 kW | 125 A | 160 A | 0.6 |
| A110 - A300 (High current specifications) | |||||
| Model |
AC-3 Rated current (380/400V) |
Corresponding motor power (400V) | AC-1 Conventional heating current(Ith, 40°C) | Short circuit protection (gG fuse) is recommended | Mechanical life |
| A110 | 110 A | 55 kW | 160 A | —— | 10 million times |
| A145 | 145 A | 110 kW | —— | —— | —— |
| A185 | 185 A | 90 kW | 275 A | —— | 5 million times |
| A210 | 192 A or 210A | 110 kW | 300 A (40°C) | —— | 5 million times |
| A260 | 350 A | ≈185kW (Estimated) | —— | —— | —— |
| A300 | 300 A | 160 kW | 400 A (40°C) | —— | 5 million times |
Supplementary Technical Parameters:
● Ambient Temperature: The AC-3 rated current in the table is based on an environment ≤55℃. At ≤40℃, the AC-1 (resistive load) current value may be higher. For example, the AC-1 current of A50 is 80A at 40℃, but drops to 75A at 55℃.
● Rated Short-Time Withstand Current (Icw): A95 can withstand a short-circuit current of 1320A within 1 second, and A9 is 250A. This is important for short-circuit protection coordination.
● Mechanical Life: A9-A25 can withstand up to 10 million cycles, and A30 and above are 8 million cycles. The maximum switching frequency is 3600 cycles/hour.
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