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MF-SMDF030-2
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Product Detailed Parameters
- Description：PTC RESET FUSE 60V 300MA 2018
- Series：Multifuse®, MF-SMDF
- Mfr：Bourns Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Polymeric
- Voltage - Max：60V
- Current - Hold (Ih) (Max)：300 mA
- Current - Trip (It)：800 mA
- Current - Max：20 A
- Time to Trip：1.5 s
- Resistance - Initial (Ri) (Min)：450 mOhms
- Resistance - Post Trip (R1) (Max)：2.2 Ohms
- Operating Temperature：-40°C ~ 85°C
- Grade：-
- Qualification：-
- Ratings：-
- Mounting Type：Surface Mount
- Package / Case：2018 (5045 Metric), Concave
- Size / Dimension：0.200" L x 0.180" W (5.08mm x 4.58mm)
- Height - Seated (Max)：-
- Thickness (Max)：0.043" (1.09mm)
- Lead Spacing：-
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Overview
The MF-SMDF030-2 is a surface-mount polymeric positive temperature coefficient (PPTC) resettable fuse manufactured by Bourns Inc. It features a hold current of 300 mA and operates within a voltage range up to 60 V. The component exhibits an initial resistance minimum of 450 mOhms and a maximum post-trip resistance of 2.2 Ohms. It trips in 1.5 seconds under fault conditions and functions across an operating temperature range from -40°C to +85°C. Physical dimensions include a length of 5.44 mm, width of 5.08 mm, and height of 1.09 mm, housed in a 2018 (5045 Metric) package.
Feature Summary
- Polymeric PTC technology provides automatic circuit protection that resets upon cooling after fault removal.
- Surface mount construction enables automated assembly and compact PCB integration.
- Concave design accommodates specific mechanical constraints while maintaining electrical performance.
Applications
- Low voltage power supply overcurrent protection
- Portable electronic device circuit safeguarding
- Battery pack protection circuits
Procurement Notes
Verify the complete part number including suffixes against official Bourns documentation to ensure correct hold current and package variant. Confirm RoHS compliance status and lead times with authorized distributors prior to ordering. Validate that the selected component meets all thermal and electrical requirements for the target application environment.
Selection Notes
Select this component based on the required 300 mA hold current and 60 V maximum voltage rating. Ensure the initial resistance and trip time specifications align with system sensitivity requirements. Verify that the 2018 package footprint matches the PCB layout and that the operating temperature range covers the intended environmental conditions.
Part Context
This part belongs to the MF-SM series of surface mount PPTC resettable fuses from Bourns. These devices are designed for overcurrent protection in space-constrained applications. The series offers various hold currents and package sizes to suit different power levels and board real estate limitations.
Replacement Considerations
Direct substitutes may include other 300 mA, 60 V PPTC fuses in similar 2018 packages from manufacturers such as Littelfuse or Bourns' own MF-SM030-2, provided electrical parameters and footprint compatibility are verified.
