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SWPA4010S4R7MT
Shenzhen Sunlord Electronics Co., Ltd.
FIXED IND 4.7UH 1.2A 168MOHM SMD
31587 Pcs New Original In Stock
4.7 µH Shielded Drum Core, Wirewound Inductor 1.2 A 168mOhm Max Nonstandard
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5.0 / 5.0
- (257 Ratings)
SWPA4010S4R7MT
Product Overview
9876496
DiGi Electronics Part Number
SWPA4010S4R7MT-DGManufacturer
Shenzhen Sunlord Electronics Co., Ltd.
SWPA4010S4R7MT
Description
FIXED IND 4.7UH 1.2A 168MOHM SMDInventory
31587 Pcs New Original In Stock
4.7 µH Shielded Drum Core, Wirewound Inductor 1.2 A 168mOhm Max Nonstandard
Quantity
Minimum 1
Minimum 1
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SWPA4010S4R7MT 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)
1.2 A
Current - Saturation (Isat)
950mA
Shielding
Shielded
DC Resistance (DCR)
168mOhm Max
Q @ Freq
-
Frequency - Self Resonant
30MHz
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)
0.039" (1.00mm)
Datasheet & Documents
HTML Datasheet
SWPA4010S4R7MT-DG
Environmental & Export Classification
Moisture Sensitivity Level (MSL)
1 (Unlimited)
ECCN
EAR99
HTSUS
8504.50.8000
Additional Information
Other Names
3442-SWPA4010S4R7MTTR
Standard Package
5,000
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
Le suivi de livraison a été précis et bien organisé, une vraie tranquillité.
Dec 02, 2025
The craftsmanship and finish are consistently impressive.
Dec 02, 2025
Their customer support team is a pleasure to work with.
Dec 02, 2025
I highly appreciate the high standards of quality maintained by DiGi Electronics. It gives me confidence to experiment and innovate without worries about product failures.
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Frequently Asked Questions (FAQ)
What are the key design-in risks when using the SWPA4010S4R7MT in a high-frequency DC-DC converter operating above 2MHz?
When integrating the SWPA4010S4R7MT into DC-DC converters above 2MHz, the primary risk is operating near its 30MHz self-resonant frequency, which can reduce effective inductance and degrade filtering performance. Engineers should verify the inductor's impedance profile in their specific layout and consider derating inductance by 10–15% at 2.5MHz+ switching frequencies. Additionally, monitor temperature rise due to core and copper losses, especially under continuous 1.2A loads. Use thermal imaging during prototyping to ensure junction temperatures remain well below 125°C ambient derating limits.
Can the SWPA4010S4R7MT replace the Murata LQW2BHN4R7SR in an RF matching circuit, and what are the critical differences to check?
While both the SWPA4010S4R7MT and Murata LQW2BHN4R7SR offer 4.7µH inductance, they are not direct replacements in RF applications. The Murata part is optimized for high-Q RF performance up to several hundred MHz, whereas the SWPA4010S4R7MT lacks specified Q-factor and is designed for power filtering with a 30MHz SRF. Using the Sunlord inductors in RF matching networks may result in poor selectivity and increased insertion loss. For RF applications, choose components with documented Q values and SRF well above operating frequency; for power applications under 3MHz, SWPA4010S4R7MT is a cost-effective, shielded alternative.
How does the ±20% tolerance of the SWPA4010S4R7MT affect power supply loop stability in tight-regulation designs?
The ±20% inductance tolerance of the SWPA4010S4R7MT introduces significant variability in LC filter resonance and control loop dynamics, potentially affecting transient response and stability margins in tightly regulated power supplies. To mitigate risk, use compensation networks with sufficient phase margin (e.g., type II/III compensators) that tolerate inductance variation. Simulate worst-case scenarios (3.76µH and 5.64µH) in SPICE to confirm loop stability across production units. For sensitive applications, consider tighter-tolerance alternatives or closed-loop voltage mode control to reduce dependency on passive component accuracy.
What thermal derating precautions should be taken with the SWPA4010S4R7MT in a densely packed SMD power stage?
In dense PCB layouts, the SWPA4010S4R7MT's 1.2A rating can be compromised due to limited heat dissipation. Even with 168mΩ DCR, I²R losses generate significant heat at high currents—e.g., 242mW at 1.2A. To ensure reliability, provide adequate copper vias under the thermal pad (if applicable), avoid placing near hot components, and maintain at least 1.5mm spacing from adjacent heat sources. Use thermal relief patterns and simulate thermal performance under max load. Derate current by 20–30% if ambient temperature exceeds 85°C or airflow is restricted.
How does the shielded construction of the SWPA4010S4R7MT compare to unshielded alternatives like the Bourns SRN4018TA-4R7 in terms of EMI and board-level integration?
The SWPA4010S4R7MT's shielded drum ferrite core significantly reduces electromagnetic interference (EMI) compared to unshielded wirewounds like the Bourns SRN4018TA-4R7, making it ideal for noise-sensitive applications such as automotive infotainment or medical sensors. While both have similar size and inductance, the Sunlord part minimizes flux leakage, reducing crosstalk with adjacent traces or components. However, shielded inductors may saturate more abruptly—verify 950mA Isat compliance under transient loads. For compact, low-EMI designs, the SWPA4010S4R7MT is preferred; for cost-sensitive, non-critical applications, Bourns offers a viable alternative with careful layout shielding.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
SWPA4010S4R7MT CAD Models
Shenzhen Sunlord Electronics Co., Ltd. SWPA4010S4R7MT PCB symbols & footprints
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