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250R120-R3ZR 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-R3ZR
- Description：PTC RESET FUSE 60V 120MA RADIAL
- Series：POLY-FUSE®, 250R
- Mfr：Littelfuse Inc.
- Package：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)：8 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-R3ZR
Ptc Resettable Fuses Overview
The Littelfuse 250R120-R3ZR is a PolySwitch resettable PTC device designed for overcurrent protection in electronic circuits. It features a hold current of 120 mA and a trip current of 240 mA, with a maximum voltage rating of 60 VDC. The component exhibits a typical resistance of 16 ohms and supports a maximum fault current of 3 A. It operates within a temperature range of -40°C to +85°C and utilizes a radial leaded form factor for PCB mounting.
Ptc Resettable Fuses Feature Summary
- Provides reliable overcurrent protection by increasing resistance during thermal overload events
- Offers automatic circuit restoration after fault conditions are cleared
- Designed for compact PCB integration using radial leaded termination
Ptc Resettable Fuses Applications
- LAN/WAN equipment protection
- Access equipment circuit safeguarding
- Telecom line-rated applications
Ptc Resettable Fuses Procurement Notes
Verify the specific ordering suffix against manufacturer documentation to confirm exact electrical characteristics and packaging configuration. Ensure compatibility with target voltage ratings and thermal management requirements before integration into final assembly designs.
Ptc Resettable Fuses Selection Notes
Select this component when circuit protection requires a resettable solution with low holding current specifications. Consider the radial leaded package for through-hole mounting constraints and verify that the maximum operating temperature aligns with the environmental conditions of the intended application system.
Ptc Resettable Fuses Part Context
This part belongs to the 250R Series of PolySwitch resettable fuses from Littelfuse. The series is engineered to protect sensitive electronics from short-duration high-voltage fault currents and overcurrent events, providing an alternative to traditional one-time fuse solutions in modern electronic designs.
Ptc Resettable Fuses Replacement Considerations
Consult official Littelfuse substitution guides for verified equivalent parts. Generic replacements may not match the precise trip current or resistance values required for sensitive circuit protection.
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