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MINIASMDCH050F-2
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Product Detailed Parameters
- Description：PTC RESET FUSE 0.50A 30V 1812
- Series：PolySwitch®, miniASMD
- Mfr：Littelfuse Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Polymeric
- Voltage - Max：30V
- Current - Hold (Ih) (Max)：500 mA
- Current - Trip (It)：1.6 A
- Current - Max：20 A
- Time to Trip：100 ms
- Resistance - Initial (Ri) (Min)：200 mOhms
- Resistance - Post Trip (R1) (Max)：1.35 Ohms
- Resistance - 25°C (Typ)：-
- Operating Temperature：-40°C ~ 125°C
- Grade：Automotive
- Qualification：AEC-Q200
- Ratings：-
- Mounting Type：Surface Mount
- Package / Case：1812 (4532 Metric), Concave
- Size / Dimension：0.181" L x 0.128" W (4.60mm x 3.24mm)
- Height - Seated (Max)：-
- Thickness (Max)：0.032" (0.82mm)
- Lead Spacing：-
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Overview
The Littelfuse MINIASMDCH050F-2 is a surface-mount polymer PTC resettable fuse from the miniASMDCH series, designed for automotive high-temperature applications. It features a 1812 (4532 metric) package with dimensions of 4.83 mm length, 3.41 mm width, and 0.82 mm height. The device has a maximum voltage rating of 30 VDC, a hold current of 500 mA, and a trip current of 1.6 A. Initial resistance ranges from 200 mOhms to 1 Ohm, with a maximum interrupting rating of 20 A. It operates within a temperature range of -40°C to +125°C and dissipates up to 1.2 W.
Feature Summary
- AEC-Q200 qualified for automotive reliability standards
- High-temperature operation up to 125°C
- Surface-mount design for automated assembly
Applications
- Automotive electronic circuit protection
- Overcurrent protection in compact auto-electronics
- Secondary circuit safeguarding in vehicle systems
Procurement Notes
Verify component authenticity through authorized Littelfuse distributors or certified suppliers. Confirm that the received parts match the MINIASMDCH050F-2 designation and exhibit AEC-Q200 certification marks. Inspect packaging for moisture sensitivity indicators, as the device is humidity-sensitive. Ensure storage conditions comply with manufacturer guidelines to prevent degradation prior to soldering.
Selection Notes
Select this component when automotive-grade reliability and high-temperature tolerance are required. The 1812 footprint suits space-constrained designs needing 500 mA hold current. Compare against standard miniASMD variants if lower temperature ratings suffice. Evaluate thermal management requirements given the 1.2 W power dissipation capability and 125°C operational limit.
Part Context
This part belongs to the miniASMDCH family, specialized for automotive environments requiring elevated temperature performance. It complements other Littelfuse SMD fuses by offering higher thermal resilience compared to standard commercial-grade counterparts. The CH suffix denotes high-temperature capability, distinguishing it from non-automotive variants within the broader PolySwitch portfolio.
Replacement Considerations
MINIASMDC050F-2 serves as a potential substitute but offers only 85°C operating temperature instead of 125°C. Verify if the application environment exceeds 85°C before considering this alternative. Other series like microSMDCH050F-02 differ in package size and voltage rating.
