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MF-USMD020-2
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Product Detailed Parameters
- Description：PTC RESET FUSE 30V 200MA 1210
- Series：Multifuse®, MF-USMD
- Mfr：Bourns Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Polymeric
- Voltage - Max：30V
- Current - Hold (Ih) (Max)：200 mA
- Current - Trip (It)：400 mA
- Current - Max：10:00 AM
- Time to Trip：20 ms
- Resistance - Initial (Ri) (Min)：400 mOhms
- Resistance - Post Trip (R1) (Max)：5 Ohms
- Operating Temperature：-40°C ~ 85°C
- Grade：-
- Qualification：-
- Ratings：-
- Mounting Type：Surface Mount
- Package / Case：1210 (3225 Metric)
- Size / Dimension：0.127" L x 0.102" W (3.22mm x 2.58mm)
- Height - Seated (Max)：-
- Thickness (Max)：0.033" (0.85mm)
- Lead Spacing：-
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Overview
The Bourns MF-USMD020-2 is a high-temperature polymeric positive temperature coefficient (PPTC) resettable fuse from the MF-USHT series. Designed for robust circuit protection, this component operates reliably in demanding thermal environments where standard PPTCs may fail. It provides overcurrent and overtemperature protection by increasing resistance significantly when fault conditions occur, automatically resetting once power is removed and the device cools down.
Feature Summary
- High-temperature capability suitable for elevated ambient conditions
- Self-resetting action eliminates need for manual replacement after fault clearance
- Compact surface-mount design facilitates automated assembly processes
Applications
- Consumer electronics requiring enhanced thermal resilience
- Industrial equipment control circuits
- Telecommunications infrastructure protection
Procurement Notes
Verify that the specific application environment does not exceed the maximum operating temperature rating defined in the official datasheet. Confirm that the hold current and trip current parameters align with the circuit's normal operating range to prevent nuisance tripping. Ensure proper PCB layout guidelines are followed for thermal dissipation and soldering integrity as specified by the manufacturer.
Selection Notes
Select this component when standard PPTC devices lack sufficient thermal stability for the intended application. Evaluate the required voltage rating and current carrying capacity against the system specifications. Consider the physical size constraints and mounting requirements to ensure compatibility with the printed circuit board design and enclosure limitations.
Part Context
This part belongs to the MF-USHT series, an expansion of Bourns' popular MF-USM line focused on high-temperature performance. The series addresses the growing need for reliable protection in applications exposed to extreme heat, offering a drop-in solution for designers seeking improved thermal endurance without changing form factors.
Replacement Considerations
Consult the official Bourns substitution guide for verified equivalent parts. Generic replacements may not match the specific high-temperature characteristics or electrical thresholds of the original component.
