| PartNumber | V56ZS20PX2855 | V56ZS20P | V56ZS20PX10 |
| Description | Varistors 20MM Radial | Varistors 20MM Radial | Varistors 20MM Radial |
| Manufacturer | Littelfuse Inc. | Littelfuse Inc. | Littelfuse Inc. |
| Product Category | TVS - Varistors, MOVs | TVS - Varistors, MOVs | TVS - Varistors, MOVs |
| Series | ZS | ZS | ZS |
| Packaging | Tape & Reel (TR) Alternate Packaging | Tape & Reel (TR) Alternate Packaging | Tape & Reel (TR) Alternate Packaging |
| Package Case | Disc 20mm | Disc 20mm | Disc 20mm |
| Mounting Type | Through Hole | Through Hole | Through Hole |
| Number of Circuits | 1 | 1 | 1 |
| Varistor Voltage Min | 50.4V | 50.4V | 50.4V |
| Varistor Voltage Typ | 56V | 56V | 56V |
| Varistor Voltage Max | 61.6V | 61.6V | 61.6V |
| Current Surge | 2kA | 2kA | 2kA |
| Maximum AC Volts | 35VAC | 35VAC | 35VAC |
| Maximum DC Volts | 45VDC | 45VDC | 45VDC |
| Energy | 30J | 30J | 30J |