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— IC芯片 | 连接器 | 传感器 | 被动器件 —
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— IC芯片 | 连接器 | 传感器 | 被动器件 —

PTC Resettable Fuses are designed to stop current flow when it exceeds a certain limit (overcurrent protection). The Fuses work by increasing its resistance as its temperature rises due to the current increase. The trip current ranges from 14 mA to 50 A with the Time to trip ranging from 8 ms to 90 s. PTC = Positive Temperature Coefficient.
| Select products | Mfr | Description | Package | Supplier Device Package | Mounting Type | Series | Operating Temperature |
|---|---|---|---|---|---|---|---|
![]() 30R300UU $0.91 | Littelfuse Inc. | PTC RESET FUSE 30V 3A RADIAL | Bulk | Through Hole | POLY-FUSE®, 30R | -40°C ~ 85°C | |
![]() 30R400UF $1.08 | Littelfuse Inc. | PTC RESET FUSE 30V 4A RADIAL | Bulk | Through Hole | POLY-FUSE®, 30R | -40°C ~ 85°C | |
![]() 30R400UMR $0.97 | Littelfuse Inc. | PTC RESET FUSE 30V 4A RADIAL | Cut Tape (CT),Tape & Box (TB) | Through Hole | POLY-FUSE®, 30R | -40°C ~ 85°C | |
![]() 30R500U $0.62 | Littelfuse Inc. | PTC RESET FUSE 30V 5A RADIAL | Bulk | Through Hole | POLY-FUSE®, 30R | -40°C ~ 85°C | |
![]() 30R500UF $1.33 | Littelfuse Inc. | PTC RESET FUSE 30V 5A RADIAL | Bulk | Through Hole | POLY-FUSE®, 30R | -40°C ~ 85°C | |
| Littelfuse Inc. | POLYFUSE RADIAL | Bulk | - | - | - | ||
| Littelfuse Inc. | POLYFUSE RADIAL | Bulk | - | - | - | ||
![]() 30R500UMR $1.47 | Littelfuse Inc. | PTC RESET FUSE 30V 5A RADIAL | Cut Tape (CT),Tape & Box (TB) | Through Hole | POLY-FUSE®, 30R | -40°C ~ 85°C |

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