| Specification code | Coil voltage VDC | Operating Voltage VDC | Releasethe voltage VDC | Coil resistance Ω | Rated power consumption of coil MW | Maximum voltage VDC |
| HFD 4/1.5 | 1.5 | ≤1.13 | ≥0.15 | 16×(1±10%) | ~140 | 2.2 |
| HFD 4/2.4 | 2.4 | ≤1.8 | ≥0.24 | 41x(1±10% | ~140 | 3.6 |
| HFD 4/3 | 3 | ≤2.25 | ≥0.3 | 64.3x(1±10%) | ~140 | 4.5 |
| HFD 4/4.5 | 4.5 | ≤3.38 | ≥0.45 | 145x(1±10%) | ~140 | 6.7 |
| HFD 4/ 5 | 5 | ≤3.75 | ≥0.5 | 178x(1±10%) | ~140 | 7.5 |
| HFD 4/ 6 | 6 | ≤4.5 | ≥0.6 | 257×(1±10%) | ~140 | 9 |
| HFD 4/ 9 | 9 | ≤6.75 | ≥0.9 | 579×(1±10%) | ~140 | 13.5 |
| HFD 4/ 12 | 12 | ≤9 | ≥1.2 | 1028×(1±10%) | ~140 | 18 |
| HFD 4/ 24 | 24 | ≤18 | ≥2.4 | 2880(1±10%) | ~200 | 36 |
After sale instructions
