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| PartNumber | B72220S3321K101 | B72220S3301K101 | B72220S3321K202 |
| Description | Varistors Varistor S20K320E3 | Varistors Varistor S20K300E3 | |
| Manufacturer | EPCOS / TDK | EPCOS | - |
| Product Category | Varistors | TVS - Varistors, MOVs | - |
| RoHS | Y | - | - |
| Series | B722xxS3/4 | - | - |
| Product | MOV | MOV | - |
| Mounting Style | PCB Mount | - | - |
| Termination Style | Radial | Radial | - |
| Package / Case | 2220 (5750 metric) | - | - |
| Voltage Rating AC | 320 VAC | 300 VAC | - |
| Voltage Rating DC | 420 VDC | 385 VDC | - |
| Varistor Voltage | 510 V | 470 VDC | - |
| Clamping Voltage | 840 V | 775 V | - |
| Diameter | 22.5 mm | 22.5 mm | - |
| Peak Surge Current | 12 kA | 12000 A | - |
| Surge Energy Rating | 320 J | 320 J | - |
| Minimum Operating Temperature | - 40 C | - | - |
| Maximum Operating Temperature | + 105 C | - | - |
| Packaging | Bulk | Bulk | - |
| Current Rating | 100 A | 100 A | - |
| Tolerance | 10 % | 10 % | - |
| Type | Leaded Varistors | Leaded Varistors | - |
| Width | 6.8 mm | 6.6 mm | - |
| Brand | EPCOS / TDK | - | - |
| Lead Spacing | 10 mm | 10 mm | - |
| Product Type | Varistors | - | - |
| Factory Pack Quantity | 1500 | - | - |
| Subcategory | Varistors | - | - |
| Unit Weight | 0.176370 oz | 0.176370 oz | - |
| Mounting | - | Radial | - |
| Operating Temperature Range | - | - 40 C to + 85 C | - |
| Package Case | - | 2220 (5750 metric) | - |