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| Part Number | PSR072UL0450X | PSR073UL0450X | PSR072UL0550X | PSR072DL0450X | PSR072UL0250X | PSR072UL0350X | PSR072UL0400X | 
|---|---|---|---|---|---|---|---|
| Manufacturer | Littelfuse Inc. | Littelfuse Inc. | Littelfuse Inc. | Littelfuse Inc. | Littelfuse Inc. | Littelfuse Inc. | Littelfuse Inc. | 
| Product Status | Active | Active | Active | Active | Active | Active | Active | 
| Mounting Type | Bolt Mount | Bolt Mount | Bolt Mount | Bolt Mount | Bolt Mount | Bolt Mount | Bolt Mount | 
| Fuse Type | Square | Square | Square | Square | Square | Square | Square | 
| Current Rating (Amps) | 450A | 450A | 550A | 450A | 250A | 350A | 400A | 
| Voltage Rating - AC | 1.3 kV | 1.3 kV | 1.3 kV | 1.3 kV | 1.3 kV | 1.3 kV | 1.3 kV | 
| Voltage Rating - DC | 1 kV | 1 kV | 1 kV | 1 kV | 1 kV | 1 kV | 1 kV | 
| Response Time | Fast Blow | Fast Blow | Fast Blow | Fast Blow | Fast Blow | Fast Blow | Fast Blow | 
| Applications | Semiconductors | Semiconductors | Semiconductors | Semiconductors | Semiconductors | Semiconductors | Semiconductors | 
| Features | Indicating | Indicating | Indicating | Indicating | Indicating | Indicating | Indicating | 
| Class | - | - | - | - | - | - | - | 
| Approval Agency | CE, cURus, UL | CE, cURus, UL | CE, cURus, UL | CCC, CE, cURus, UL | CE, cURus, UL | CE, cURus, UL | CE, cURus, UL | 
| Operating Temperature | -55°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C | 
| Breaking Capacity @ Rated Voltage | 100kA AC, 150kA DC | 100kA AC, 150kA DC | 100kA AC, 150kA DC | 100kA AC, 150kA DC | 100kA AC, 150kA DC | 100kA AC, 150kA DC | 100kA AC, 150kA DC | 
| Package / Case | - | - | - | - | - | - | - | 
| Size / Dimension | 2.843" L x 2.362" W x 2.598" H (72.20mm x 60.00mm x 66.00mm) | 2.882" L x 2.894" W x 3.130" H (73.20mm x 73.50mm x 79.50mm) | 2.843" L x 2.362" W x 2.598" H (72.20mm x 60.00mm x 66.00mm) | 2.843" L x 2.362" W x 2.598" H (72.20mm x 60.00mm x 66.00mm) | 2.843" L x 2.362" W x 2.598" H (72.20mm x 60.00mm x 66.00mm) | 2.843" L x 2.362" W x 2.598" H (72.20mm x 60.00mm x 66.00mm) | 2.843" L x 2.362" W x 2.598" H (72.20mm x 60.00mm x 66.00mm) |