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SWPA4030S4R7MT
Shenzhen Sunlord Electronics Co., Ltd.
FIXED IND 4.7UH 2A 78 MOHM SMD
22161 Pcs New Original In Stock
4.7 µH Shielded Drum Core, Wirewound Inductor 2 A 78mOhm Max Nonstandard
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5.0 / 5.0
- (117 Ratings)
SWPA4030S4R7MT
Product Overview
9876823
DiGi Electronics Part Number
SWPA4030S4R7MT-DGManufacturer
Shenzhen Sunlord Electronics Co., Ltd.
SWPA4030S4R7MT
Description
FIXED IND 4.7UH 2A 78 MOHM SMDInventory
22161 Pcs New Original In Stock
4.7 µH Shielded Drum Core, Wirewound Inductor 2 A 78mOhm Max Nonstandard
Quantity
Minimum 1
Minimum 1
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SWPA4030S4R7MT Technical Specifications
Category
Fixed Inductors
Packaging
Tape & Reel (TR)
Series
SWPA
Product Status
Active
Type
Drum Core, Wirewound
Material - Core
Ferrite
Inductance
4.7 µH
Tolerance
±20%
Current Rating (Amps)
2 A
Current - Saturation (Isat)
3.2A
Shielding
Shielded
DC Resistance (DCR)
78mOhm Max
Q @ Freq
-
Frequency - Self Resonant
31MHz
Ratings
-
Operating Temperature
-40°C ~ 125°C
Inductance Frequency - Test
100 kHz
Features
-
Mounting Type
Surface Mount
Package / Case
Nonstandard
Supplier Device Package
-
Size / Dimension
0.157" L x 0.157" W (4.00mm x 4.00mm)
Height - Seated (Max)
0.118" (3.00mm)
Datasheet & Documents
HTML Datasheet
SWPA4030S4R7MT-DG
Environmental & Export Classification
Moisture Sensitivity Level (MSL)
1 (Unlimited)
ECCN
EAR99
HTSUS
8504.50.8000
Additional Information
Other Names
3442-SWPA4030S4R7MTCT
3442-SWPA4030S4R7MTDKR
3442-SWPA4030S4R7MTTR
Standard Package
2,000
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
我很欣賞他們在包裝上的細心，每個商品都包裝得妥妥當當，沒有任何破損的疑慮，品質令人放心。
Dec 02, 2025
The logistics tracking provided by DiGi Electronics is precise and reliable.
Dec 02, 2025
Whenever I need assistance, their staff is always ready to help with enthusiasm.
Dec 02, 2025
Their affordable prices combined with helpful service create a winning shopping environment.
Dec 02, 2025
Price-wise, DiGi is highly competitive, and their environmental efforts earn my respect.
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Frequently Asked Questions (FAQ)
What are the key design risks when replacing SWPA4030S4R7MT with a lower-cost inductor like the Würth WE-LQS 744040447 in a 2A buck converter?
Replacing SWPA4030S4R7MT with Würth WE-LQS 744040447 (4.7 µH, 2.1 A) may seem viable due to similar inductance and current ratings, but critical differences exist: the Würth part has a higher DCR (95 mΩ vs. 78 mΩ max), leading to increased conduction losses and reduced efficiency under load. Additionally, its saturation current (Isat ≈ 2.8 A) is lower than SWPA4030S4R7MT’s 3.2 A, risking premature inductance roll-off during transient peaks. In high-ambient-temperature applications (>85°C), this margin loss can cause thermal runaway. Always validate dynamic load response and thermal performance before substitution, especially in space-constrained or high-reliability systems.
How does the nonstandard package of SWPA4030S4R7MT affect PCB layout and high-density designs?
The SWPA4030S4R7MT uses a nonstandard 4.00 mm × 4.00 mm footprint with a 3.00 mm height, which lacks direct pin-to-pin compatibility with industry-standard packages like 4020 or 4030. This complicates drop-in replacements and requires custom land patterns, increasing PCB design complexity and DFM risks. In high-density layouts, the 3 mm height may interfere with adjacent components or heatsinks. Ensure adequate creepage and clearance (≥0.5 mm) around the inductor to avoid arcing, especially at >12V input. Use 3D mechanical checks and consider adhesive fixation if vibration is a concern, as the drum core structure is less robust than molded inductors.
Can SWPA4030S4R7MT handle continuous operation at 2A in a 125°C ambient environment without derating?
No—despite its 2A current rating, operating SWPA4030S4R7MT continuously at 2A in a 125°C ambient exceeds safe limits. The rated temperature range (-40°C to 125°C) refers to storage and operational survivability, not full-load capability. At elevated temperatures, core losses increase and wire insulation degrades faster. Sunlord typically recommends derating current by 20–30% above 85°C. For reliable operation at 125°C, limit RMS current to ≤1.4 A and monitor hotspot temperature via thermal imaging. Consider forced airflow or switching to a higher Isat-rated inductor (e.g., SWPA5040 series) if full 2A is required in hot environments.
What are the EMI implications of using SWPA4030S4R7MT in a sensitive analog front-end power rail, and how does its shielding compare to unshielded alternatives?
The SWPA4030S4R7MT’s drum-core ferrite construction provides moderate magnetic shielding, reducing near-field coupling by ~15–20 dB compared to unshielded wirewounds like the LQH43PN4R7MP0. However, it is not as effective as fully enclosed molded inductors (e.g., TDK VLS5040EX). In sensitive analog circuits (e.g., ADC or RF stages), place the inductor ≥5 mm away from high-impedance nodes and orient it perpendicular to signal traces to minimize flux linkage. Add a ground guard ring beneath the component and use a local LC filter post-inductor to suppress residual ripple. Always perform conducted and radiated EMI scans during prototype validation.
Is SWPA4030S4R7MT suitable for automotive-grade applications requiring AEC-Q200 compliance, and what reliability concerns should I consider?
The SWPA4030S4R7MT is not AEC-Q200 qualified, despite its -40°C to 125°C operating range, making it unsuitable for direct use in automotive power systems (e.g., infotainment, ADAS). Sunlord does not publish full qualification data (e.g., thermal cycling, HAST, mechanical shock) required by AEC-Q200. For automotive designs, consider qualified alternatives like Bourns SRN4030TA-4R7Y or Vishay IHLP-2020BZ-01. If used in non-safety-critical automotive accessories, implement additional screening: 100% burn-in at 125°C for 48 hours and monitor DCR drift. Also, note MSL 1 rating allows unlimited floor life, but moisture ingress during assembly can still affect long-term reliability in under-hood environments—use conformal coating if exposed.
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SWPA4030S4R7MT CAD Models
Shenzhen Sunlord Electronics Co., Ltd. SWPA4030S4R7MT PCB symbols & footprints
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