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| PartNumber | Z7D221 | Z7D220 | Z7D221T4C |
| Description | Varistors 220V 1250A 8.5mm | Varistors 22V 250A 8.5mm | |
| Manufacturer | Semitec | Semitec | - |
| Product Category | TVS - Varistors, MOVs | TVS - Varistors, MOVs | - |
| Packaging | Bulk | Bulk | - |
| Mounting | Radial | Radial | - |
| Operating Temperature Range | - 40 C to + 85 C | - 40 C to + 85 C | - |
| Capacitance | 1700 pF | 4500 pF | - |
| Diameter | 22.5 mm | 22.5 mm | - |
| Voltage Rating AC | 140 VAC | 14 VAC | - |
| Voltage Rating DC | 180 VDC | 18 VDC | - |
| Clamping Voltage | 340 V | 250 V | - |
| Peak Surge Current | 6.5 kA | 6.5 kA | - |
| Surge Energy Rating | 19 J | 1.3 J | - |