| PartNumber | TMOV34S621M | TMOV34S621EP | TMOV34S621MP |
| Description | Varistors TMOV34S | Varistors THERMALLY PROTECTED VARISTOR 34 MM DISC | Varistors THERMALLY PROTECTED VARISTOR 34MM |
| Manufacturer | Littelfuse | Littelfuse | Littelfuse |
| Product Category | Varistors | Varistors | Varistors |
| RoHS | Y | Y | Y |
| Series | 34S | 34S | 34S |
| Product | MOV | MOV | MOV |
| Mounting Style | PCB Mount | PCB Mount | PCB Mount |
| Termination Style | Radial | Radial | Radial |
| Voltage Rating AC | 620 VAC | 620 VAC | 620 VAC |
| Voltage Rating DC | 800 VDC | 800 VDC | 800 VDC |
| Clamping Voltage | 1.589 kV | 1.589 kV | 1.589 kV |
| Diameter | 34 mm | 34 mm | 34 mm |
| Peak Surge Current | 40 kA | 40 kA | 40 kA |
| Surge Energy Rating | 840 J | - | - |
| Capacitance | 2100 pF | 2100 pF | 2100 pF |
| Minimum Operating Temperature | - 55 C | - 55 C | - 55 C |
| Maximum Operating Temperature | + 85 C | + 85 C | + 85 C |
| Packaging | Bulk | Bulk | Bulk |
| Current Rating | 40 A | - | - |
| Height | 15.4 mm | - | - |
| Length | 37 mm | - | - |
| Tolerance | 20 % | 20 % | 20 % |
| Type | High Energy Industrial Thermally Protected Varistor | - | - |
| Brand | Littelfuse | Littelfuse | Littelfuse |
| Product Type | Varistors | Varistors | Varistors |
| Factory Pack Quantity | 30 | 30 | 30 |
| Subcategory | Varistors | Varistors | Varistors |
| Tradename | TMOV | TMOV | TMOV |