| PartNumber | ROV20-561K-S | ROV20-561K-2 | ROV20-561K |
| Description | Varistors 20mm 350V +-10% | Varistors 20mm 560V +-10% | Varistors 20mm 560V +-10% |
| Manufacturer | Littelfuse | Littelfuse | Littelfuse |
| Product Category | Varistors | Varistors | Varistors |
| RoHS | Y | Y | Y |
| Series | ROV20 | ROV20 | ROV20 |
| Product | MOV | MOV | MOV |
| Mounting Style | PCB Mount | PCB Mount | PCB Mount |
| Termination Style | Radial | Radial | Radial |
| Voltage Rating AC | 350 VAC | 350 VAC | 350 VAC |
| Voltage Rating DC | 560 VDC | 560 VDC | 560 VDC |
| Clamping Voltage | 920 V | 920 V | 920 V |
| Diameter | 20 mm | 20 mm | 20 mm |
| Peak Surge Current | 6.5 kA | 6.5 kA | 6.5 kA |
| Surge Energy Rating | 312 J | 312 J | 312 J |
| Capacitance | 679 pF | 679 pF | 679 pF |
| Minimum Operating Temperature | - 40 C | - 40 C | - 40 C |
| Maximum Operating Temperature | + 85 C | + 85 C | + 85 C |
| Packaging | Bulk | Bulk | Bulk |
| Tolerance | 10 % | 10 % | 10 % |
| Type | Standard Metal Oxide Varistors | Standard Metal Oxide Varistors | Standard Metal Oxide Varistors |
| Brand | Littelfuse | Littelfuse | Littelfuse |
| Product Type | Varistors | Varistors | Varistors |
| Factory Pack Quantity | 150 | 500 | 450 |
| Subcategory | Varistors | Varistors | Varistors |
| Part # Aliases | C21679-000 | E19065-000 | E49692-000 |