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| PartNumber | V20E550PL1T | V20E550PL1T7 | V20E550PL1B7 |
| Description | Varistors 550V 20mm Epoxy UltraMOV | Varistors 20MM Radial | Varistors 20MM Radial |
| Manufacturer | Littelfuse | Littelfuse Inc. | Littelfuse Inc. |
| Product Category | Varistors | TVS - Varistors, MOVs | TVS - Varistors, MOVs |
| RoHS | Y | - | - |
| Series | UltraMOV | UltraMOV | UltraMOV |
| Voltage Rating DC | 910 VDC | - | - |
| Clamping Voltage | 1.5 kV | - | - |
| Packaging | Reel | Tape & Reel (TR) Alternate Packaging | Bulk Alternate Packaging |
| Brand | Littelfuse | - | - |
| Product Type | Varistors | - | - |
| Factory Pack Quantity | 400 | - | - |
| Subcategory | Varistors | - | - |
| Tradename | UltraMOV | UltraMOV | UltraMOV |
| Package Case | - | Disc 20mm | Disc 20mm |
| Mounting Type | - | Through Hole | Through Hole |
| Number of Circuits | - | 1 | 1 |
| Varistor Voltage Min | - | 819V | 819V |
| Varistor Voltage Typ | - | 910V | 910V |
| Varistor Voltage Max | - | 1001V (1.001kV) | 1001V (1.001kV) |
| Current Surge | - | 10kA | 10kA |
| Maximum AC Volts | - | 550VAC | 550VAC |
| Maximum DC Volts | - | 745VDC | 745VDC |
| Energy | - | 370J | 370J |