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MF-USML190-2
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Product Detailed Parameters
- Description：PTC RESET FUSE 6V 1.9A 1210
- Series：Multifuse®, MF-USML
- Mfr：Bourns Inc.
- Package：Tape & Reel (TR),Bulk
- Type：Polymeric
- Voltage - Max：6V
- Current - Hold (Ih) (Max)：1.9 A
- Current - Trip (It)：4.9 A
- Current - Max：50 A
- Time to Trip：3 s
- Resistance - Initial (Ri) (Min)：6 mOhms
- Resistance - Post Trip (R1) (Max)：30 mOhms
- Operating Temperature：-40°C ~ 85°C
- Grade：-
- Qualification：-
- Ratings：-
- Mounting Type：Surface Mount
- Package / Case：1210 (3225 Metric), Concave
- Size / Dimension：0.127" L x 0.102" W (3.22mm x 2.58mm)
- Height - Seated (Max)：-
- Thickness (Max)：0.024" (0.60mm)
- Lead Spacing：-
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Overview
The Bourns MF-USML190-2 is a surface-mount polymer positive temperature coefficient (PPTC) resettable fuse from the USML series. It provides overcurrent protection in compact SMD packages suitable for space-constrained layouts. The device utilizes a 125°C polymer PTC element designed for high-voltage and high-temperature environments. Key electrical parameters include a hold current of 1.90 Amperes, a trip current of 3.80 Amperes, a maximum voltage rating of 60 Volts DC, and a maximum current rating of 30 Amperes. It features low resistance to minimize power loss.
Feature Summary
- Provides robust overcurrent and surge protection in high-temperature environments
- Eliminates tripping caused by ambient temperature variations
- Offers flexible design options with compact surface-mount packaging
Applications
- Automotive circuit protection
- Industrial equipment overcurrent safeguarding
- Telecommunication systems
- Consumer electronics safety circuits
Procurement Notes
Verify component authenticity through authorized Bourns distributors or direct channels. Confirm that the specific suffix matches the required hold current and package type. Request material data sheets and certification documents to ensure compliance with project specifications and regulatory standards before finalizing procurement.
Selection Notes
Select this component based on the required hold current of 1.90A and the 60V DC voltage rating. Ensure the application environment supports the 125°C polymer element capabilities. Consider the compact SMD form factor for PCB layout efficiency. Validate thermal management requirements against the device's operating temperature range.
Part Context
This part belongs to the Multifuse USML series, which expands Bourns' portfolio of high-temperature PPTC devices. The series is engineered for applications requiring reliable fault protection in harsh conditions. It complements other Bourns circuit protection solutions by offering a cost-effective alternative to traditional fuses in modern electronic designs.
Replacement Considerations
Consult official Bourns documentation for verified substitute part numbers within the same series or family. Ensure any replacement maintains identical electrical ratings and physical dimensions. Do not assume cross-model compatibility without explicit manufacturer confirmation.
