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DO5040H-183MLD
Coilcraft
FIXED IND 18UH 6A 22MOHM SM
2563 Pcs New Original In Stock
18 µH Unshielded Wirewound Inductor 6 A 22mOhm Nonstandard
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5.0 / 5.0
- (308 Ratings)
DO5040H-183MLD
Product Overview
2171481
DiGi Electronics Part Number
DO5040H-183MLD-DGManufacturer
Coilcraft
DO5040H-183MLD
Description
FIXED IND 18UH 6A 22MOHM SMInventory
2563 Pcs New Original In Stock
18 µH Unshielded Wirewound Inductor 6 A 22mOhm Nonstandard
Quantity
Minimum 1
Minimum 1
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DO5040H-183MLD Technical Specifications
Category
Fixed Inductors
Packaging
Tape & Reel (TR)
Series
DO5040H
Product Status
Active
Type
Wirewound
Material - Core
Ferrite
Inductance
18 µH
Tolerance
±20%
Current Rating (Amps)
6 A
Current - Saturation (Isat)
13.2A
Shielding
Unshielded
DC Resistance (DCR)
22mOhm
Q @ Freq
-
Frequency - Self Resonant
14MHz
Ratings
AEC-Q200
Operating Temperature
-40°C ~ 85°C
Inductance Frequency - Test
100 kHz
Features
-
Mounting Type
Surface Mount
Package / Case
Nonstandard
Supplier Device Package
-
Size / Dimension
0.730" L x 0.600" W (18.54mm x 15.24mm)
Height - Seated (Max)
0.472" (12.00mm)
Datasheet & Documents
HTML Datasheet
DO5040H-183MLD-DG
Environmental & Export Classification
ECCN
EAR99
HTSUS
8504.50.8000
Additional Information
Other Names
2457-DO5040H-183MLD
Standard Package
1
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
Leurs produits sont de premier ordre et la livraison se fait sans aucun retard.
Dec 02, 2025
Their after-sales team is knowledgeable and very helpful, enhancing my overall experience.
Dec 02, 2025
Their economical prices allow us to upgrade our components without overspending.
Dec 02, 2025
Their affordable pricing makes it easy to choose DiGi Electronics for all my tech needs.
Dec 02, 2025
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Frequently Asked Questions (FAQ)
When designing a new DC-DC converter with a target inductance of 18µH, how can I mitigate the risk of exceeding the 6A current rating for the Coilcraft DO5040H-183MLD under transient load conditions?
To mitigate the risk of exceeding the 6A current rating of the Coilcraft DO5040H-183MLD during transient loads, implement a robust current sensing and feedback loop in your DC-DC converter. Consider oversampling or using a more aggressive filtering approach on the output to detect and respond to sudden current demands. Additionally, analyze your expected worst-case load profiles to ensure sufficient margin beyond the nominal 6A rating for the Coilcraft DO5040H-183MLD, as its saturation current (Isat) of 13.2A offers a buffer, but relying solely on Isat for normal operation is not advised.
What are the potential reliability concerns when replacing a standard 18µH inductor with the Coilcraft DO5040H-183MLD in an existing automotive application that requires AEC-Q200 qualification?
While the Coilcraft DO5040H-183MLD is AEC-Q200 qualified, a key reliability concern when replacing a standard inductor is the potential for thermal management differences. The DO5040H-183MLD has a lower DC resistance (22mOhm) compared to some standard parts, which can lead to less self-heating under load. However, ensure your PCB layout adequately dissipates heat from the DO5040H-183MLD, as exceeding its 85°C operating temperature limit, even with a lower DCR, could still impact its long-term reliability. Also, verify that the mechanical fit and soldering conditions are appropriate for its nonstandard package.
How does the ±20% tolerance on the inductance of the Coilcraft DO5040H-183MLD impact the stability and performance of a resonant circuit, and what are the practical considerations for managing this variation during design?
The ±20% inductance tolerance of the Coilcraft DO5040H-183MLD can significantly affect the resonant frequency and Q-factor of a resonant circuit. For circuits sensitive to precise frequency, this variation might lead to off-tuning. To manage this, consider designing your resonant circuit with a wider operating bandwidth or incorporate a tunable component. Alternatively, if the application is highly critical, you might need to select components with tighter tolerances or explore post-assembly calibration for the Coilcraft DO5040H-183MLD. The self-resonant frequency of 14MHz for the DO5040H-183MLD also needs to be considered in relation to your operating frequency to avoid performance degradation.
Is the Coilcraft DO5040H-183MLD a suitable drop-in replacement for the Murata LQH55PN180M04L, considering the current handling and physical dimensions in a power filtering application?
The Coilcraft DO5040H-183MLD is not a direct drop-in replacement for the Murata LQH55PN180M04L. While both offer 18µH inductance, the DO5040H-183MLD has a higher current rating (6A vs. LQH55PN180M04L's typical 1.8A) and a lower DCR (22mOhm vs. LQH55PN180M04L's typical 100mOhm). However, the physical dimensions are also different: the DO5040H-183MLD is larger (0.730" L x 0.600" W) than the LQH55PN180M04L. You would need to verify PCB space and consider the increased current handling capability when substituting the Coilcraft DO5040H-183MLD. Also, confirm that the LQH55PN180M04L's shielding is not critical for your application, as the DO5040H-183MLD is unshielded.
What are the implications of the Coilcraft DO5040H-183MLD being unshielded on nearby sensitive circuitry, and how can I effectively mitigate potential electromagnetic interference (EMI) in my system design?
The unshielded nature of the Coilcraft DO5040H-183MLD means it can radiate electromagnetic interference (EMI) that might affect sensitive analog components or communication channels in close proximity. To mitigate this risk, ensure proper PCB layout practices such as keeping high-current traces short and using ground planes effectively. Consider strategically placing decoupling capacitors near the DO5040H-183MLD to shunt noise. If EMI remains a concern, additional shielding for the entire board or targeted shielding around the inductor itself might be necessary. It's also prudent to perform EMI testing on your prototype with the Coilcraft DO5040H-183MLD in place to identify and address any issues proactively.
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DO5040H-183MLD CAD Models
Coilcraft DO5040H-183MLD PCB symbols & footprints
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