Monolithic Power Systems (MPS) is a fabless US power management IC company. All products are fabricated at TSMC and UMC in Taiwan, facing 0% MFN + 10% Section 122 = 10% total. No Section 301 applies.
Monolithic Power Systems (MPS) is headquartered in United States, but most components are manufactured in Taiwan, Taiwan. For US customs purposes, the COO is where the component is manufactured — not where the company is based. Declaring United States as COO when parts ship from Taiwan is a customs violation.
| Country | Sec 122 | Sec 301 | Total |
|---|---|---|---|
| Taiwan | 10% | — | 10% |
| Taiwan | 10% | — | 10% |
* Section 301 rates shown for electronics HTS chapters (8541–8542). Rates vary by product.
| HTS Code | Description |
|---|---|
| 8542.39.0000 | Buck/boost converters, LED drivers, multi-phase controllers |
| 8504.40.9550 | Power modules (MPM series) |
Monolithic Power Systems is headquartered in San Jose, California, and operates as a pure fabless company. All integrated circuit fabrication is outsourced to TSMC and UMC in Taiwan. Taiwan-origin MPS products: 0% MFN + 10% Section 122 = 10% total. No Section 301 applies. MPS competes with Texas Instruments and Analog Devices in power management, with a strong presence in AI server power delivery (MP2993 multi-phase controller for GPU VRMs, MP2856 for CPU VRDs). At AI infrastructure build-out scale, MPS power management ICs are imported in significant volumes; the 10% Section 122 tariff is a fixed landed cost input.
Enter any Monolithic Power Systems (MPS) part number to get the COO, HTS code, and full duty calculation including MPF and HMF.
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