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MINISMDC075F/33-2
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Product Detailed Parameters
- Description：PTC RESET FUSE 33V 750MA 1812
- Series：PolySwitch®, miniSMD
- Mfr：Littelfuse Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Polymeric
- Voltage - Max：33V
- Current - Hold (Ih) (Max)：750 mA
- Current - Trip (It)：1.6 A
- Current - Max：100 A
- Time to Trip：1 s
- Resistance - Initial (Ri) (Min)：110 mOhms
- Resistance - Post Trip (R1) (Max)：390 mOhms
- Resistance - 25°C (Typ)：-
- Operating Temperature：-40°C ~ 85°C
- Grade：-
- Qualification：-
- Ratings：-
- Mounting Type：Surface Mount
- Package / Case：1812 (4532 Metric)
- Size / Dimension：0.181" L x 0.128" W (4.60mm x 3.24mm)
- Height - Seated (Max)：-
- Thickness (Max)：0.057" (1.46mm)
- Lead Spacing：-
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Overview
The Littelfuse MINISMDC075F/33-2 is a surface-mount polymer PTC resettable fuse from the miniSMD series. It features a maximum voltage of 33 VDC, a hold current of 750 mA, and a trip current of 1.6 A. The device has a maximum fault current rating of 100 A and an initial resistance of 110 mOhms minimum. Maximum post-trip resistance is 390 mOhms with a trip time of 1 second. It operates between -40°C and +85°C in a 1812 (4532 metric) package measuring 4.60 mm x 3.24 mm x 1.46 mm.
Feature Summary
- Provides overcurrent protection through automatic resistance increase upon thermal activation
- Supports surface mount assembly for automated PCB integration
- Offers repeatable circuit recovery after fault conditions clear
Applications
- Portable electronic devices requiring compact circuit protection
- Communication equipment interfaces
- Peripheral connections on consumer electronics boards
Procurement Notes
Verify component authenticity by checking manufacturer markings against official datasheet specifications. Confirm RoHS compliance status and moisture sensitivity level prior to soldering. Ensure storage conditions meet humidity requirements to maintain reliability during assembly processes.
Selection Notes
Select this component when space constraints require a small form factor like the 1812 package. Choose based on the 33 VDC maximum voltage limit and 750 mA hold current requirements. Consider the 100 A maximum fault current capability for specific surge protection needs.
Part Context
This part belongs to the PolySwitch miniSMD family of resettable fuses designed for surface mount applications. It serves as a reusable alternative to traditional one-time fuses, offering protection against overcurrent events while maintaining low profile dimensions suitable for modern printed circuit board layouts.
Replacement Considerations
MINISMDC075F/24-2 offers similar characteristics with a lower 24VDC rating. SMDC075F-2 provides equivalent electrical performance but utilizes a larger 2920 package size.
