The Walsin SR 781K25DS40F is a metal oxide varistor with a maximum operating voltage of 640V and a maximum surge current of 18000A. It has a capacitance of 980pF and a clamping voltage of 1290V. The varistor is rated for operation between -55°C and 85°C and is designed for through-hole mounting with a terminal pitch of 12.7mm. It is suitable for overvoltage and ESD protection applications.
| RoHS |
Yes |
| Mounting |
Through Hole |
| Technology |
Metal Oxide |
| Capacitance |
980pF |
| RoHS Version |
2011/65/EU, 2015/863 |
| Terminal Pitch |
12.7mm |
| Clamping Current |
100A |
| Clamping Voltage |
1290V |
| Varistor Voltage |
858V |
| Max AC Voltage Rating |
485V |
| Max DC Voltage Rating |
640V |
| Maximum Surge Current |
18000A |
| Max Operating Temperature |
85°C |
| Min Operating Temperature |
-55°C |