| PartNumber | B72220S0321K501 | B72220S0321K151 | B72220S0321K101 |
| Description | Varistors Varistor S20K320S5 | Varistors Varistor S20K320G5 | Varistors 320volts 8000A |
| Manufacturer | EPCOS / TDK | EPCOS / TDK | EPCOS |
| Product Category | Varistors | TVS - Varistors, MOVs | TVS - Varistors, MOVs |
| RoHS | Y | - | - |
| Series | B722xxS0 | B722 | Disk Standard |
| Product | MOV | MOV | MOV |
| Mounting Style | PCB Mount | - | - |
| Termination Style | Radial | Radial | - |
| Voltage Rating AC | 320 VAC | 320 VAC | 320 VAC |
| Voltage Rating DC | 420 VDC | 420 VDC | 420 VDC |
| Varistor Voltage | 510 V | 510 VDC | - |
| Clamping Voltage | 840 V | 840 V | 840 V |
| Diameter | 21.5 mm | 20 mm | 20 mm |
| Peak Surge Current | 8 kA | 8 kA | 8 kA |
| Surge Energy Rating | 184 J | 184 J | - |
| Capacitance | 720 pF | 720 pF | 540 pF |
| Minimum Operating Temperature | - 40 C | - | - |
| Maximum Operating Temperature | + 105 C | - | - |
| Packaging | Bulk | Reel | Bulk |
| Current Rating | 100 A | 100 A | - |
| Height | 25.5 mm | - | - |
| Length | 21.5 mm | - | - |
| Tolerance | 10 % | 10 % | 10 % |
| Type | Leaded Varistors | Leaded Varistors | - |
| Width | 5.8 mm | - | - |
| Brand | EPCOS / TDK | - | - |
| Lead Spacing | 10 mm | 10 mm | - |
| Product Type | Varistors | - | - |
| Factory Pack Quantity | 1500 | - | - |
| Subcategory | Varistors | - | - |
| Part # Aliases | 321K501 B72220S B72220S321K501 | - | - |
| Unit Weight | 0.529109 oz | 0.529109 oz | 0.529109 oz |
| Mounting | - | Through Hole | Radial |
| Operating Temperature Range | - | - 40 C to + 85 C | - 40 C to + 85 C |