| PartNumber | B72220S2381K101 | B72220S2301K101 | B72220S2321K101 |
| Description | Varistors 385V RMS 20MM RADIAL Varistor S20K385E2 | Varistors 300V RMS 20MM RADIAL Varistor S20K300E2 | Varistors 320V RMS 20MM RADIAL Varistor S20K320E2 |
| Manufacturer | EPCOS / TDK | EPCOS / TDK | EPCOS |
| Product Category | Varistors | Varistors | TVS - Varistors, MOVs |
| RoHS | Y | Y | - |
| Series | B722xxS2 | B722xxS2 | Disk Advanced |
| Mounting Style | PCB Mount | PCB Mount | - |
| Termination Style | Radial | Radial | Radial |
| Voltage Rating AC | 385 VAC | 470 VAC | 320 VAC |
| Voltage Rating DC | 505 VDC | 385 VDC | 420 VDC |
| Diameter | 21.5 mm | 21.5 mm | 21.5 mm |
| Peak Surge Current | 10 kA | 1 kA | 1 kA |
| Surge Energy Rating | 273 J | 250 J | 273 J |
| Minimum Operating Temperature | - 40 C | - 40 C | - |
| Maximum Operating Temperature | + 105 C | + 105 C | - |
| Packaging | Bulk | Bulk | Bulk |
| Length | 25.5 mm | 25.5 mm | - |
| Brand | EPCOS / TDK | EPCOS / TDK | - |
| Product Type | Varistors | Varistors | - |
| Factory Pack Quantity | 1600 | 1500 | - |
| Subcategory | Varistors | Varistors | - |
| Unit Weight | 0.141096 oz | 0.141096 oz | 0.141096 oz |
| Varistor Voltage | - | 470 V | 510 VDC |
| Product | - | - | MOV |
| Current Rating | - | - | 100 A |
| Mounting | - | - | Radial |
| Operating Temperature Range | - | - | - 40 C to + 85 C |
| Capacitance | - | - | 720 pF |
| Tolerance | - | - | 10 % |
| Lead Spacing | - | - | 10 mm |
| Clamping Voltage | - | - | 840 V |