Monolithic Power Systems Inc. MPL-SE4030-R68

Overview

MPL-SE4030-R68 from Monolithic Power Systems is a semi-shielded power inductor with 0.68 µH nominal inductance (±20%), 10 mΩ typical DCR, 6 A rated current (ΔT = 40 K), and 7.5 A saturation current at 25°C. It features a 4.0 mm × 4.0 mm × 3.0 mm footprint, operates from –40°C to +125°C, and is optimized for high-efficiency DC-DC converters in battery-powered embedded systems.

For engineers reviewing the MPL-SE4030-R68 datasheet, MPL-SE4030-R68 pinout (two-terminal SMT device), MPL-SE4030-R68 application in buck converter output filters or input chokes, or MPL-SE4030-R68 equivalent for compact high-current power stages, this page delivers verified electrical specs, thermal behavior, and layout-critical performance data including stray field suppression and low-temperature-rise operation.

Technical Context

This inductor uses a semi-shielded ferrite core construction with copper winding optimized for low AC/DC resistance trade-offs. Its 180 MHz self-resonant frequency enables stable operation in switching regulators up to 2 MHz, while its 30% inductance drop threshold at ISAT defines usable current headroom before magnetic saturation.

The device's thermal derating is defined per standardized single-layer PCB test conditions (35 µm Cu, 30×50 mm board), and its +125°C max operating temperature includes both ambient and self-heating contributions-critical for sealed or high-density industrial and computing applications.

Key Specifications

Pinout & Package

As a two-terminal surface-mount power inductor, MPL-SE4030-R68 has no active pins or signal routing. Its terminals are symmetric, non-polarized solder pads located on opposite ends of the 4.0 mm × 4.0 mm body. The semi-shielded structure minimizes magnetic coupling to adjacent traces and components.

Key Features

Applications

Availability

MPL-SE4030-R68 is available at Aetrix Electronics and suitable for battery-powered devices, high-efficiency SMPS, and embedded computing applications requiring stable component supply, consistent parametric performance across production lots, and long-term lifecycle support.

Supply support for MPL-SE4030-R68 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 passive components, headquartered in Kirkland, WA, with global design and support centers.

MPL-SE series inductors are part of MPS's integrated power solution ecosystem, designed specifically to complement their DC-DC controllers and modules-enabling optimized, layout-efficient, and thermally robust power stages for space- and efficiency-critical applications.

FAQ

What is the recommended PCB land pattern for MPL-SE4030-R68?

The official land pattern specifies 2.0 mm × 3.0 mm solder pads spaced 3.0 mm center-to-center, with 0.3 mm solder mask expansion. Thermal relief vias (≥4×0.3 mm) beneath each pad are recommended to enhance heat dissipation in high-current designs.

Does MPL-SE4030-R68 have polarity or orientation sensitivity?

No-MPL-SE4030-R68 is a non-polarized, symmetric two-terminal inductor. Its terminals are electrically interchangeable, and no orientation marking or directional placement is required during assembly.

How does temperature affect saturation current in this inductor?

Saturation current decreases with rising ambient temperature: ISAT drops from 7.5 A at 25°C to 6.5 A at 100°C due to reduced core permeability. This derating must be applied when sizing for worst-case thermal environments like enclosed industrial enclosures.

Can MPL-SE4030-R68 replace unshielded inductors in existing designs?

Yes-its identical footprint and comparable DCR allow drop-in replacement, but the semi-shielded construction reduces stray flux by ~40%, often eliminating need for keep-out zones or ground-plane cuts previously required for unshielded types.

Is tape-and-reel packaging available for this part?

Yes-MPL-SE4030-R68 ships in EIA-481-compliant tape-and-reel format: 2,000 units per reel, 12 mm tape width, 4 mm pocket depth, and embossed carrier tape compatible with standard pick-and-place equipment.

What is the maximum allowable reflow peak temperature for this inductor?

The device is rated for standard lead-free reflow profiles with peak temperature ≤260°C for ≤30 seconds. Exceeding this may degrade the epoxy coating integrity or cause internal delamination, affecting long-term reliability.