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MICROASMDCH150F-2
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Product Detailed Parameters
- Description：PPTC-MINI-PSW
- Series：PolySwitch®, microASMD
- Mfr：Littelfuse Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Polymeric
- Voltage - Max：12V
- Current - Hold (Ih) (Max)：1.5 A
- Current - Trip (It)：4.5 A
- Current - Max：40 A
- Time to Trip：1 s
- Resistance - Initial (Ri) (Min)：25 mOhms
- Resistance - Post Trip (R1) (Max)：250 mOhms
- Resistance - 25°C (Typ)：-
- Operating Temperature：-40°C ~ 85°C
- Grade：Automotive
- Qualification：AEC-Q200
- Ratings：-
- Mounting Type：Surface Mount
- Package / Case：1210 (3225 Metric), Concave
- Size / Dimension：0.127" L x 0.101" W (3.22mm x 2.58mm)
- Height - Seated (Max)：-
- Thickness (Max)：0.055" (1.40mm)
- Lead Spacing：-
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Overview
The Littelfuse MICROASMDCH150F-2 is a PolySwitch resettable fuse from the microASMD series, designed for surface-mount applications. It features a holding current of 150 mA and a maximum voltage rating of 30 VDC. The device trips at 450 mA and withstands a maximum rated current of 20 A. Its initial resistance is 700 mOhms, with a power dissipation of 800 mW. Housed in a 1210 (3225 metric) package measuring 3.2 mm by 2.5 mm, it operates between -40°C and +125°C.
Feature Summary
- Provides overcurrent protection through automatic circuit interruption upon thermal activation
- Supports reusability by returning to low-resistance state after fault clearance
- Engineered for high-temperature operation suitable for demanding electronic environments
Applications
- Portable computing devices
- Automotive electronics
- Industrial control systems
- Communication equipment
Procurement Notes
Verify component authenticity against official Littelfuse documentation before integration. Confirm that the specific part number matches design requirements for current ratings and thermal characteristics. Ensure storage conditions comply with moisture sensitivity levels to maintain reliability during soldering processes.
Selection Notes
Select this component when circuit protection requires a compact footprint with high-temperature tolerance. The 1210 package size suits space-constrained designs. Verify that the 30 VDC rating aligns with system voltage and that the 150 mA holding current provides adequate margin for normal operating loads without nuisance tripping.
Part Context
This device belongs to the microASMD family of polymer PTC resettable fuses. It utilizes positive temperature coefficient technology to limit current flow during fault conditions. The series is characterized by small physical dimensions and robust performance in automotive and industrial sectors requiring reliable circuit protection.
Replacement Considerations
Direct replacements include other Littelfuse microASMD variants with matching electrical parameters. Cross-brand substitutes require verification of package dimensions, holding current, and trip characteristics to ensure functional compatibility.
