Littelfuse NANO²® 451 series, 0451.200NR, board mount SMD fuse, 200 mA, 125 V AC/DC, fast blow, 50 A breaking capacity, 2-SMD square end block package, tape and reel.
| Parameter | Value |
|---|---|
| Series | NANO²® 451 |
| Fuse type | Board Mount (Cartridge Style Excluded) |
| Mounting | Surface Mount |
| Voltage rating - AC | 125 V |
| Voltage rating - DC | 125 V |
| Breaking capacity @ rated voltage | 50A |
| Current rating | 200 mA |
| Response time | Fast Blow |
| Operating temperature | -55°C~125°C |
| Size (Dimension) | 0.240\" L x 0.106\" W x 0.106\" H (6.10mm x 2.69mm x 2.69mm) |
| Approval agency | CSA, cULus |
| Package | Tape & Reel (TR) |
| Melting i2t | 0.0089 |
| Case | 2-SMD, Square End Block |
| DC cold resistance | 0.8372 Ohms |
The 0451.200NR is a 200 mA fast-blow SMD fuse from Littelfuse's NANO²® 451 series, rated for 125 V AC and 125 V DC with a breaking capacity of 50 A at rated voltage. The melting I²t of 0.0089 A²s defines the energy let-through before clearing — relevant for coordinating with downstream semiconductor protection. DC cold resistance is 0.8372 Ohms, which sets the voltage drop at rated current at roughly 167 mV.
The fuse is CSA and cULus approved, indicating compliance with North American safety standards for branch-circuit and supplementary protection.