| PartNumber | TMOV34S661MP | TMOV34S661M | TMOV34S661EP |
| Description | Varistors THERMALLY PROTECTED VARISTOR 34MM | Varistors TMOV34S | Varistors THERMALLY PROTECTED VARISTOR 34 MM DISC |
| Manufacturer | Littelfuse | Littelfuse | Littelfuse Inc. |
| Product Category | Varistors | Varistors | TVS - Varistors, MOVs |
| RoHS | Y | Y | - |
| Series | 34S | 34S | TMOVR 34S |
| Product | MOV | MOV | MOV |
| Mounting Style | PCB Mount | PCB Mount | - |
| Termination Style | Radial | Radial | - |
| Voltage Rating AC | 660 VAC | 660 VAC | 660 VAC |
| Voltage Rating DC | 850 VDC | 850 VDC | 850 VDC |
| Clamping Voltage | 1.72 kV | 1.72 kV | 1.72 kV |
| Diameter | 34 mm | 34 mm | 34 mm |
| Peak Surge Current | 40 kA | 40 kA | 40 kA |
| Capacitance | 2000 pF | 2000 pF | 2000 pF |
| Minimum Operating Temperature | - 55 C | - 55 C | - |
| Maximum Operating Temperature | + 85 C | + 85 C | - |
| Packaging | Bulk | Bulk | Bulk |
| Tolerance | 20 % | 20 % | 20 % |
| Brand | Littelfuse | Littelfuse | - |
| Product Type | Varistors | Varistors | - |
| Factory Pack Quantity | 30 | 30 | - |
| Subcategory | Varistors | Varistors | - |
| Tradename | TMOV | TMOV | - |
| Surge Energy Rating | - | 900 J | - |
| Current Rating | - | 40 A | - |
| Height | - | 15.8 mm | - |
| Length | - | 37 mm | - |
| Type | - | High Energy Industrial Thermally Protected Varistor | - |
| Mounting | - | - | Radial |
| Operating Temperature Range | - | - | - 55 C to + 85 C |
| Package Case | - | - | Square 34mm, Formed Tabs |
| Mounting Type | - | - | Through Hole |
| Number of Circuits | - | - | 1 |
| Varistor Voltage Min | - | - | 945V |
| Varistor Voltage Typ | - | - | 1050V (1.05kV) |
| Varistor Voltage Max | - | - | 1155V (1.155kV) |
| Current Surge | - | - | 40kA |
| Maximum AC Volts | - | - | 660VAC |
| Maximum DC Volts | - | - | 850VDC |
| Energy | - | - | 1030J |