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250R120-RAZR is listed in the Ptc Resettable Fuses range at ChipApex. The manufacturer field lists Littelfuse Inc.. Its product description is PTC RESET FUSE 60V 120MA RADIAL. Review the specifications below when checking this part for your BOM.
Ptc Resettable Fuses specifications for 250R120-RAZR
- Description：PTC RESET FUSE 60V 120MA RADIAL
- Series：POLY-FUSE®, 250R
- Mfr：Littelfuse Inc.
- Package：Cut Tape (CT),Tape & Box (TB)
- Type：Polymeric
- Voltage - Max：60V (250V Int)
- Current - Hold (Ih) (Max)：120 mA
- Current - Trip (It)：240 mA
- Current - Max：3:00 AM
- Time to Trip：2.5 s
- Resistance - Initial (Ri) (Min)：7 Ohms
- Resistance - Post Trip (R1) (Max)：16 Ohms
- Resistance - 25°C (Typ)：-
- Operating Temperature：-40°C ~ 85°C
- Grade：-
- Qualification：-
- Ratings：-
- Mounting Type：Through Hole
- Package / Case：Radial, Disc
- Size / Dimension：0.256" L x 0.181" W (6.50mm x 4.60mm)
- Height - Seated (Max)：0.433" (11.00mm)
- Thickness (Max)：-
- Lead Spacing：0.201" (5.10mm)
Ptc Resettable Fuses datasheet and documents for 250R120-RAZR
Ptc Resettable Fuses Overview
The Littelfuse 250R120-RAZR is a radial-leaded PolySwitch resettable PTC device designed for overcurrent protection. It features a holding current of 120 mA and a trip current of 650 mA, with a maximum voltage rating of 60 VDC. The component exhibits a maximum resistance of 4 Ohms and supports a maximum fault current of 10 A. It operates within a temperature range of -40°C to +85°C and offers a power dissipation capacity of 1.8 W.
Ptc Resettable Fuses Feature Summary
- Provides reliable overcurrent protection by increasing resistance during thermal events
- Offers automatic circuit restoration after fault conditions clear
- Designed for compact PCB mounting with radial leads
Ptc Resettable Fuses Applications
- LAN/WAN equipment protection
- Access equipment circuits
- Telecom line protection
Ptc Resettable Fuses Procurement Notes
Verify the specific suffix 'RAZR' against official Littelfuse documentation to confirm lead-free plating or halogen-free status. Ensure the procurement specification matches the exact 250R series electrical parameters. Confirm package type and axial versus radial configuration if ordering variants.
Ptc Resettable Fuses Selection Notes
Select this component for applications requiring fast time-to-trip characteristics in low-voltage DC circuits. Consider the 4 Ohm maximum resistance and 1.8 W power dissipation limits when designing thermal management. Verify that the 60 VDC rating aligns with the system's maximum operating voltage.
Ptc Resettable Fuses Part Context
This part belongs to the 250R Series of PolySwitch resettable fuses from Littelfuse. The series is engineered to protect against short-duration high voltage fault currents. It serves as a solid-state alternative to traditional fusible links, providing reusable protection for sensitive electronic components.
Ptc Resettable Fuses Replacement Considerations
Consult official Littelfuse substitution guides for verified equivalents. Generic PTC replacements may not match the specific trip current or response time requirements of the 250R series.
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