Monolithic Power Systems Inc. MPL-SE4030-1R0

Overview

MPL-SE4030-1R0 from Monolithic Power Systems is a semi-shielded power inductor with 1.0 µH nominal inductance (±20%), 14 mΩ typical DCR, 5.5 A rated current (ΔT = 40 K), 7 A saturation current at 25°C, and 5.7 A at 100°C - designed for high-efficiency DC-DC converters in battery-powered embedded systems.

For engineers reviewing the MPL-SE4030-1R0 datasheet, MPL-SE4030-1R0 pinout (though non-pin device), MPL-SE4030-1R0 application in buck converter output filters, or MPL-SE4030-1R0 equivalent inductor alternatives, this page delivers verified electrical specs, thermal performance context, package dimensions, and real-world design constraints including PCB layout dependency and temperature-rise behavior.

Technical Context

This inductor operates across -40°C to +125°C ambient (including self-heating), with inductance measured at 100 kHz/100 mA and saturation defined as 30% L-drop at both 25°C and 100°C. Its semi-shielded construction minimizes stray magnetic field coupling while enabling compact 4.0 mm × 4.0 mm × 3.0 mm footprint.

Rated current is validated on a single-layer 30 mm × 50 mm PCB with 35 µm copper; actual thermal performance depends on trace width, proximity to heat sources, and multilayer stack-up. Resonance frequency is 130 MHz, supporting stable operation well beyond typical SMPS switching frequencies (up to 2–3 MHz).

Key Specifications

Pinout & Package

As a surface-mount passive inductor, MPL-SE4030-1R0 has two solder terminals (no pins). It uses a semi-shielded molded SMD package with exposed copper pads for thermal and electrical connection.

Key Features

Applications

Availability

MPL-SE4030-1R0 is available at Aetrix Electronics and suitable for battery-powered devices, high-efficiency SMPS, and embedded computing applications requiring stable component supply, consistent thermal performance, and RoHS-compliant magnetics.

Supply support for MPL-SE4030-1R0 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance power management ICs and integrated power modules, headquartered in Kirkland, WA.

The MPL-SE series is engineered for high-current, high-frequency DC-DC conversion in space-constrained applications - emphasizing low loss, thermal resilience, and EMI control in modern embedded and industrial power designs.

FAQ

What is the recommended PCB land pattern for MPL-SE4030-1R0?

The official land pattern specifies 2.5 mm × 3.0 mm copper pads with 0.5 mm solder mask opening per terminal, spaced 2.8 mm center-to-center. Thermal relief vias (≥4× 0.3 mm) under each pad are strongly advised to enhance heat dissipation in high-current layouts.

How does temperature affect saturation current in this inductor?

Saturation current drops from 7 A at 25°C to 5.7 A at 100°C ambient due to reduced core permeability at elevated temperatures. This 18% reduction must be accounted for in worst-case thermal design - especially in sealed enclosures or stacked PCB assemblies.

Can MPL-SE4030-1R0 replace unshielded inductors in existing designs?

Yes, but only if layout allows - its semi-shielded structure reduces stray field by ~60% versus comparable unshielded types. However, its slightly higher profile (3.0 mm height) may require mechanical clearance review, and DCR is 10–15% higher than some unshielded alternatives with same L/ISAT.

Is this inductor suitable for use with GaN FETs switching at 1.5 MHz?

Yes - its 130 MHz self-resonant frequency and stable inductance up to 10 MHz ensure minimal phase shift and predictable filtering. Measured Q-factor >25 at 1.5 MHz confirms low core loss, making it appropriate for high-frequency GaN-based point-of-load converters.

What is the meaning of "1R0" in the part number?

"1R0" is the industry-standard inductance code indicating 1.0 µH: "R" replaces the decimal point, so "1R0" = 1.0 µH. This coding aligns with EIA-198 and is marked directly on the top surface of the component.

Does this inductor meet AEC-Q200 stress testing requirements?

No - MPL-SE4030-1R0 is not AEC-Q200 qualified. It is rated for industrial temperature range (-40°C to +125°C), but lacks the extended lifetime testing, vibration, and humidity cycling required for automotive qualification. For automotive applications, consult MPS's AEC-Q200-certified MPLA series.