NRS3015T100M - 10uH 700mA Semi-Shielded Power Inductor | Taiyo Yuden
MPN: NRS3015T100M β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.1 | $0.10 |
| 10 | $0.06 | $0.60 |
| 100 | $0.036 | $3.60 |
| 500 | $0.03 | $15.00 |
| 1,000 | $0.024 | $24.00 |
NRS3015T100M Overview
A power inductor is a passive magnetic component that stores energy in a magnetic field when current flows through its winding. Within the power-management hierarchy, it sits at the component level of a DC-DC converter stage: a voltage regulator (power management IC) uses the inductor, together with switching MOSFETs and output capacitors, to convert one DC voltage to another. Power inductors are characterized by inductance, saturation and rated current, DC resistance (DCR), and the degree of magnetic shielding.
The NRS3015T100M belongs to Taiyo Yuden's NR/NRS series of SMD power inductors. Its semi-shielded drum-core construction confines most of the magnetic flux within the component body, reducing coupling into neighboring circuits compared with fully open drum-core designs while avoiding the higher DCR of fully shielded types. The M suffix denotes a 20% inductance tolerance, and the part is wound with copper wire on a magnetic drum core to achieve 10 uH in a small footprint.
Key engineering figures are the 700 mA rated current, 264 mOhm maximum DCR (which sets the DC copper loss, roughly 0.13 W at rated current - estimate based on I2R using 0.7 A squared times 0.264 Ohm), and the 3.0 x 3.0 mm footprint with a low 1.5 mm profile. These figures suit buck and boost converter outputs in the few-hundred-milliamp class.
Typical applications include point-of-load buck converter output filters in portable and battery-powered devices, LED driver rails, DC-DC modules for IoT and wearables, and general-purpose power supply decoupling and ripple filtering.
When designing with this inductor, verify that the peak switching current including ripple remains below the saturation rating of the part, and keep high di/dt loop areas small by placing the inductor directly adjacent to the switching regulator pins.
This page synthesizes verified distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for NRS3015T100M β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
NRS3015T100MNGH
β Drop-Inπ Reference alternative (not in catalog)
NR3015T100M
β Drop-Inπ Reference alternative (not in catalog)
NRS3015T100M Maximum Ratings & Electrical Characteristics
| Inductance | 10 uH |
| Inductance Tolerance | +/-20% (M) |
| Rated Current | 700 mA |
| Max DC Resistance (DCR) | 264 mOhm |
| Type | Semi-Shielded Drum Core, Wirewound |
| Series | NRS (NR Series S Type) |
| Package Size | 1212 (3.0 mm x 3.0 mm x 1.5 mm), nonstandard |
| Mounting Type | Surface Mount |
| Termination Style | 2-terminal SMD pads |
| Core Material | Magnetic drum core (semi-shielded) |
| Shielding | Semi-shielded |
NRS3015T100M 1212 (3.0 mm x 3.0 mm x 1.5 mm), nonstandard Pin Configuration Guide
Pin configuration for NRS3015T100M (1212 (3.0 mm x 3.0 mm x 1.5 mm), nonstandard package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for NRS3015T100M.
Refer to the datasheet for full pin configuration.
Typical Applications
NRS3015T100M is suitable for 6 applications: Portable Buck Converter Output Filter, IoT Node and Wearable Power Rails, LED Driver Constant-Current Rails, Industrial Sensor and Control Modules, USB Peripheral and Hub Power Filtering, RF Module and Precision Analog Supply Decoupling.
Portable Buck Converter Output Filter
In battery-powered portable electronics, a point-of-load buck converter steps a lithium-ion rail (3.0-4.2 V) down to 1.8 V or 2.5 V for MCUs, memory, and sensors. The NRS3015T100M fits this role because its 10 uH inductance keeps ripple current low at typical 1-2 MHz switching frequencies - at 1 MHz with 3.7 V input and 1.8 V output, ripple current is roughly (VIN-VOUT) x D / (f x L), about 1 mA per uH-scale tens of milliamps, well within the 700 mA rating. The 264 mOhm DCR limits DC copper loss to about 0.13 W at full load (estimate), preserving battery runtime, while the semi-shielded drum core confines flux so switching harmonics do not radiate into nearby RF or analog circuitry. Place the inductor within 2-3 mm of the regulator SW and BOOT pins to shrink the hot loop.
Recommended
IoT Node and Wearable Power Rails
Wearable and IoT devices demand power components with low profile and modest current ratings. The NRS3015T100M's 1.5 mm maximum height and 3.0 x 3.0 mm footprint fit the thin stacks of smart badges, sensor tags, and BLE nodes, while its 700 mA rating covers the transmit-burst current of Bluetooth Low Energy and sub-GHz radio power amplifiers. The semi-shielded construction is important on such dense boards: open drum-core inductors at 10 uH can couple millivolt-level spikes into nearby crystal or antenna traces, whereas the NR-series magnetic body reduces stray field. At light load, DCR of 264 mOhm contributes only a few millivolts of drop at 20-50 mA sleep-mode rails. Verify the part's saturation behavior against radio TX burst currents using the datasheet inductance-vs-current curves before layout sign-off.
Recommended
LED Driver Constant-Current Rails
Low-power LED drivers, whether switching buck topologies or linear boost stages, require an energy-transfer inductor sized for the string current. For LED strings drawing 300-600 mA - typical of indicator panels, small luminaires, and backlit displays - the NRS3015T100M's 700 mA rating provides margin, and the semi-shielded core prevents visible flicker mechanisms caused by radiated coupling into sense circuits. Its 10 uH value smooths the driver's switching ripple so LED current ripple stays low, protecting against visible artifacts and long-term color shift. The 264 mOhm DCR is acceptable at this current (about 0.07-0.10 W estimated dissipation at 0.5-0.6 A), though in sealed luminaires where ambient exceeds 70 C, derate the current per the manufacturer's temperature-rise data in the NR-series specification.
Recommended
Industrial Sensor and Control Modules
Industrial sensor heads, 4-20 mA transmitters, and PLC I/O modules use 24 V buses that must be stepped down and filtered. The NRS3015T100M serves in the intermediate DC-DC stages that generate 5 V or 3.3 V rails for the analog front end. Its semi-shielded construction helps meet EMC expectations in electrically noisy factory environments by limiting stray magnetic coupling into milli-volt-level sensor signals carried on adjacent traces. The +/-20% M-code tolerance is adequate for power-rail filtering where inductance precision is not critical. At industrial ambient temperatures, verify the current derating in the datasheet temperature-rise curves, and maintain creepage/clearance around the inductor pads per the module's isolation plan when the inductor sits on the isolated secondary side of the design.
Recommended
USB Peripheral and Hub Power Filtering
USB-powered peripherals, hubs, and dongles derive 3.3 V and 1.x V rails from the 5 V VBUS through compact buck converters. The NRS3015T100M, rated 700 mA, matches typical bus-powered device budgets (USB 2.0 allows 500 mA unit load; downstream rails are lower). The 10 uH inductance filters the switching node so conducted emissions on the cable stay within USB and CISPR-style conducted-emission budgets, and the semi-shielded body prevents coupling into the nearby USB differential pair routing. With 264 mOhm DCR, the IR drop at 400 mA is about 106 mV (estimate), which must be budgeted in the rail's total droop allocation. Keep the inductor and its output capacitor loop tight and away from the D+/D- pair to preserve signal integrity.
Recommended
RF Module and Precision Analog Supply Decoupling
RF modules and precision analog front ends are highly sensitive to supply-borne ripple. A common architecture places a switching converter followed by the NRS3015T100M as part of a pi-filter or output stage, then an ultra-low-noise LDO for the final RF/analog rail. The 10 uH inductance presents high impedance at switching frequencies of 1-2 MHz and above, isolating the LDO from regulator ripple, while 264 mOhm DCR adds only modest DC drop. The semi-shielded drum core matters here because open-core inductors radiate flux that can induce spurs directly into VCO or LNA circuitry. Keep the inductor's field excluded from sensitive nodes by orientation and spacing, and follow with a low-noise LDO to achieve microvolt-level rail noise for the RF block.
Recommended
Recommended Products Summary
Engineering reference data for NRS3015T100M β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | NRS3015T100MNGH | NR3015T100M |
|---|---|---|---|
| Package | 1212 (3.0 x 3.0 x 1.5 mm) nonstandard | 1212 (3.0 x 3.0 x 1.5 mm) nonstandard - same | 1212 (3.0 x 3.0 x 1.5 mm) nonstandard - same |
| Brand | Taiyo Yuden | Taiyo Yuden | Taiyo Yuden |
| Inductance | 10 uH | 10 uH | 10 uH |
| Rated Current | 700 mA | 700 mA | 710 mA |
| Max DCR | 264 mOhm | 264 mOhm | 276 mOhm |
| Construction | Semi-shielded drum core, wirewound | Semi-shielded drum core, wirewound | Semi-shielded drum core, wirewound |
Key Differentiators
- Lower DC resistance in the same footprint (vs NR3015T100M)
- Semi-shielded construction with compact 1.5 mm profile (vs Open drum-core alternatives of equal inductance)
- Trade-off: slightly lower rated current than NR3015T100M (vs NR3015T100M)
Design Notes
Distinguish rated current from saturation current. The 700 mA figure for the NRS3015T100M is the rating published by distributors; the saturation current (inductance-drop limit) is a separate curve in the Taiyo Yuden NR-series datasheet. In a buck converter, peak inductor current equals output current plus half the ripple. Estimated example: for 5 V to 3.3 V at 500 mA with 1 MHz switching and 10 uH, ripple is about (5-3.3)x0.66/(1e6x10e-6) ~ 112 mA, so peak current is roughly 556 mA. Confirm this peak stays within both the rated and saturation curves, including transients.
Place the inductor directly adjacent to the switching regulator: the SW-pin-to-inductor-to-input-capacitor loop carries the full switching current and dominates radiated emissions. Use short, wide traces (at least 0.5 mm wide for 700 mA-class currents to keep IR drop and heating low), and connect the inductor output pad directly to the output capacitor with a solid pour. Do not route signal traces under the inductor body; although semi-shielded, the drum core still leaks flux at the terminal ends. Keep at least 2 mm spacing to sensitive analog routing.
Estimated thermal load: at the 700 mA rating with 264 mOhm max DCR, DC copper loss is approximately 0.13 W (0.7 A squared x 0.264 Ohm). Add AC winding and core losses at your switching frequency, typically bringing total loss to 0.15-0.25 W in the 1-2 MHz class. This is a wirewound part on a small 3.0 x 3.0 mm pad set, so copper area under the pads is the main heatsink; provide at least a small ground pour connected to adjacent thermal vias if ambient exceeds 70 C. Verify winding temperature against the datasheet temperature-rise derating curves.
Compliance Information
Compliance status was not explicitly stated in the retrieved web data. Confirm on the Taiyo Yuden product page or distributor RoHS certificates. AEC-Q100 is not applicable to passive inductors.
