LQH32CN100K23L - 10uH 300mA Wirewound Inductor | Murata
MPN: LQH32CN100K23L β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.14 | $0.14 |
| 10 | $0.1 | $1.00 |
| 100 | $0.062 | $6.20 |
| 500 | $0.048 | $24.00 |
| 1,000 | $0.038 | $38.00 |
LQH32CN100K23L Overview
A wirewound chip inductor is a passive two-terminal component that stores energy in a magnetic field created by copper wire wound around a magnetic core. Within the component hierarchy, it belongs to the inductor family of fixed inductors, which in turn sit inside the broader magnetics and passive components category of surface-mount devices. Unlike multilayer chip inductors, wirewound drum-core types achieve higher inductance values and better saturation behavior in a compact footprint, which is why they are widely used as power chokes and choke coils in DC supply lines.
Key differentiating features of the LQH32CN100K23L include its 10 uH inductance measured at 1 MHz, the ferrite drum core construction, and the unshielded open-magnetic-circuit design that minimizes package height and cost. The 572 mOhm maximum DCR keeps copper losses low at the 300 mA rated current, and the tight +/-10 percent tolerance supports predictable filter corner frequencies.
Technically, the wirewound-on-ferrite-drum architecture delivers a stable inductance value with a self-resonant frequency suitable for choke service; because the winding is exposed in an unshielded structure, flux leakage and coupling to adjacent components must be considered in layout.
Typical applications include DC-DC converter output filtering, power supply choke coils, noise suppression on power rails, and general-purpose signal-line choke service in consumer, industrial, and communication equipment.
For design, derate the 300 mA rating as ambient temperature approaches the upper operating limit, and verify self-resonant behavior at your operating frequency. Estimated power loss at rated current is approximately 51 mW from I-squared-R (0.3 A squared times 0.572 Ohm).
This page adds value beyond the Murata datasheet by consolidating distributor pricing context, drop-in alternatives, practical design notes, and an AEO-optimized FAQ in one place.
Drop-in alternatives for LQH32CN100K23L 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:
LQH32CN100K33L
β Drop-Inπ Reference alternative (not in catalog)
LQH32CN100K23M
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
LQH32CN120K23L
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
LQH32CN100K23L Maximum Ratings & Electrical Characteristics
| Inductance | 10 uH |
| Inductance Tolerance | +/-10% |
| Test Frequency | 1 MHz |
| Max DC Current | 300 mA |
| Max DC Resistance (DCR) | 572 mOhm |
| Shielding | Unshielded |
| Type | Wirewound, Drum Core (Power Inductor for Choke) |
| Core Material | Ferrite |
| Mounting Type | Surface Mount |
| Package / Case | 1210 (3.2 mm x 1.6 mm), Nonstandard |
| Termination | Solder-plated, SMD chip |
| Packaging | Tape & Reel |
| RoHS Status | Compliant |
LQH32CN100K23L 1210 (3.2 mm x 1.6 mm), nonstandard Pin Configuration Guide
Pin configuration for LQH32CN100K23L (1210 (3.2 mm x 1.6 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 LQH32CN100K23L.
Refer to the datasheet for full pin configuration.
Typical Applications
LQH32CN100K23L is suitable for 6 applications: DC-DC Converter Output Filtering, Power Rail Noise Suppression (Choke Coil), Audio Equipment Power Filtering, Consumer Electronics Power Chokes, Industrial Control Board Rail Filtering, Communication Equipment Bias and Supply Chokes.
DC-DC Converter Output Filtering
The LQH32CN100K23L serves as an output or power-stage choke in low-power buck and boost converters where the load current stays at or below 300 mA. Its 10 uH inductance at 1 MHz gives a usable impedance against switching ripple, while the 572 mOhm DCR limits voltage drop across the choke. Placed between the switching node and the output bulk capacitor, it smooths the switched waveform; the unshielded drum core keeps cost and profile low but requires placement away from feedback traces. Estimated copper loss at full rated current is roughly 51 mW (0.3 A squared times 0.572 Ohm), leaving ample thermal margin in typical SMD assemblies.
Recommended
Power Rail Noise Suppression (Choke Coil)
As a series choke on noisy supply rails, the LQH32CN100K23L blocks conducted high-frequency noise while passing DC with only about 172 mV of estimated drop at full 300 mA load (0.3 A times 0.572 Ohm). Murata classifies this part explicitly as a power inductor of the wirewound type for choke service. The 10 uH value, combined with adjacent ceramic bypass capacitors, forms a low-pass filter whose corner frequency sits well below switching and clock harmonics. Because the ferrite drum core is unshielded, designers should route the inductor away from clock lines and analog inputs, or orient adjacent inductors perpendicular to minimize mutual coupling on multi-rail boards.
Recommended
Audio Equipment Power Filtering
In audio amplifiers and DAC supplies, the LQH32CN100K23L filters supply ripple and digital noise before it reaches sensitive analog stages. The wirewound-on-ferrite construction provides stable 10 uH inductance without the voltage dependence and lossy behavior of some ferrite-bead-only solutions, and the 300 mA rating covers headphone amplifiers, preamp stages, and op-amp supply rails. The unshielded structure should be kept away from low-level signal wiring to avoid hum pickup at power-line related frequencies. Combined with bulk and ceramic capacitance, the LC filter formed with this inductor reduces audible supply-borne noise in consumer and professional audio equipment designs.
Recommended
Consumer Electronics Power Chokes
Set-top boxes, LED TV backlights, routers, and small appliances all contain multiple low-current rails that need commodity chokes; the LQH32CN100K23L fits this role with its inexpensive 1210 footprint and 300 mA capability. The surface-mount wirewound construction withstands standard reflow assembly, and the +/-10 percent tolerance keeps filter behavior repeatable in volume production. Its unshielded, open-magnetic design keeps unit cost low, which matters when a single board may use several chokes. Designers should verify flux coupling when placing multiple LQH32CN parts side by side, orienting them orthogonally where possible to suppress mutual inductance between adjacent power filtering stages.
Recommended
Industrial Control Board Rail Filtering
On industrial control boards - PLC I/O modules, sensor conditioners, and motor-control interface cards - the LQH32CN100K23L filters switched-mode intermediates and suppresses conducted noise from relays and switching regulators on 3.3 V to 24 V derived rails. The 300 mA rating suits per-channel or per-node filtering, and the ferrite drum core holds its 10 uH value under DC bias better than many ceramic-chip alternatives at this size. The estimated 51 mW dissipation at rated current is negligible for industrial ambient budgets. Layout should respect the unshielded core: keep it clear of precision analog references and route returns directly under the inductor to minimize loop area and radiated pickup.
Recommended
Communication Equipment Bias and Supply Chokes
In networking interfaces, RF module supply and bias networks, and baseband boards, the LQH32CN100K23L provides DC feed and supply-rail choke functions up to 300 mA. The 10 uH inductance presents high impedance to switching and clock spurs while contributing minimal DC loss thanks to the 572 mOhm DCR. Because the part is unshielded, RF layouts must reserve placement area away from the antenna path and sensitive receiver front ends, or account for flux leakage in the stackup. Its small 3.2 x 1.6 mm footprint supports the dense layouts typical of routers, small-cell modules, and IoT gateway hardware where many rails require individual chokes.
Recommended
Recommended Products Summary
Engineering reference data for LQH32CN100K23L β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LQH32CN100K33L | LQH32CN100K23M | LQH32CN120K23L |
|---|---|---|---|---|
| Package | 1210 (3.2 x 1.6 mm), Nonstandard chip | 1210 (3.2 x 1.6 mm) - same | 1210 (3.2 x 1.6 mm) - same | 1210 (3.2 x 1.6 mm) - same |
| Brand | Murata Manufacturing | Murata Manufacturing | Murata Manufacturing | Murata Manufacturing |
| Inductance | 10 uH | 10 uH | 10 uH | 12 uH |
| Shielding | Unshielded drum core | Unshielded - same | Unshielded - same | Unshielded - same |
| Core Material | Ferrite | Ferrite - same | Ferrite - same | Ferrite - same |
Key Differentiators
- Wirewound construction for better DCR at 10 uH (vs 1210 multilayer chip inductors)
- Same-family drop-in availability (vs LQH32CN100K33L)
- Lower cost and profile than shielded power inductors (vs Shielded 1210-class power inductors)
Design Notes
Derate the 300 mA rating when the choke operates near the upper end of the ambient range. Estimated copper loss at full rated current is 51 mW (0.3 A squared x 0.572 Ohm) and the estimated DC voltage drop is 172 mV - budget both in low-headroom rails. In switching converters, total RMS current (including ripple) governs heating, not just DC load, so size the LQH32CN100K23L for peak-plus-ripple current rather than average load current.
The LQH32CN100K23L is unshielded, so magnetic flux escapes the open drum core. Place it away from RF traces, crystal circuits, and precision analog nodes, and if using multiple chokes, orient adjacent parts orthogonally to minimize mutual coupling. Keep the loop formed by the inductor, its input switching node, and the bypass capacitor as small as possible. Follow Murata's land-pattern recommendation in the official datasheet for reliable reflow filleting of the chip terminations.
Do not assume the 1 MHz test-frequency inductance applies at all frequencies: above the self-resonant point the part behaves capacitively, so verify the SRF against your operating band. Also avoid substituting a physically similar 1210 multilayer inductor - multilayer parts at 10 uH typically show far higher DCR and lower current capability than this wirewound type. Finally, confirm the suffix code (K23L vs K33L variants) against the current Murata datasheet before qualifying alternates in production.
Compliance Information
RoHS compliant per DigiKey/Murata product listings. REACH, halogen-free, and conflict-minerals declarations were not explicitly stated in the retrieved data; consult Murata's official compliance documents.
