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SWPA6045S4R7MT
Shenzhen Sunlord Electronics Co., Ltd.
FIXED IND 4.7UH 3.3A 34MOHM SMD
16013 Pcs New Original In Stock
4.7 µH Shielded Drum Core, Wirewound Inductor 3.3 A 34mOhm Max Nonstandard
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5.0 / 5.0
- (132 Ratings)
SWPA6045S4R7MT
Product Overview
9876906
DiGi Electronics Part Number
SWPA6045S4R7MT-DGManufacturer
Shenzhen Sunlord Electronics Co., Ltd.
SWPA6045S4R7MT
Description
FIXED IND 4.7UH 3.3A 34MOHM SMDInventory
16013 Pcs New Original In Stock
4.7 µH Shielded Drum Core, Wirewound Inductor 3.3 A 34mOhm Max Nonstandard
Quantity
Minimum 1
Minimum 1
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SWPA6045S4R7MT 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)
3.3 A
Current - Saturation (Isat)
5.5A
Shielding
Shielded
DC Resistance (DCR)
34mOhm Max
Q @ Freq
-
Frequency - Self Resonant
24MHz
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
0.236" L x 0.236" W (6.00mm x 6.00mm)
Height - Seated (Max)
0.177" (4.50mm)
Datasheet & Documents
HTML Datasheet
SWPA6045S4R7MT-DG
Environmental & Export Classification
Moisture Sensitivity Level (MSL)
1 (Unlimited)
ECCN
EAR99
HTSUS
8504.50.8000
Additional Information
Other Names
3442-SWPA6045S4R7MTCT
3442-SWPA6045S4R7MTTR
3442-SWPA6045S4R7MTDKR
Standard Package
1,500
Alternative Parts
View DetailsPART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
Professionell, zuverlässig und immer freundlich – so beschreibt man DiGi Electronics am besten.
Dec 02, 2025
I always appreciate their friendly customer service at DiGi Electronics.
Dec 02, 2025
Shipping efficiency from DiGi Electronics surpasses expectations.
Dec 02, 2025
I highly recommend them for their dependable shipping and excellent after-sales support.
Dec 02, 2025
Prompt shipping combined with detailed tracking made this a truly hassle-free purchase.
Dec 02, 2025
I commend their rapid shipping and unwavering product quality.
Dec 02, 2025
DiGi Electronics is my go-to because of their fast delivery and excellent service.
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Frequently Asked Questions (FAQ)
Can the SWPA6045S4R7MT handle high inrush currents in DC-DC converters without saturating during startup or load transients?
Yes, the SWPA6045S4R7MT has a saturation current (Isat) of 5.5A, which provides a safety margin above its 3.3A rated current. In practical design scenarios, this allows it to withstand typical inrush currents in buck or boost converters, especially in point-of-load applications. However, engineers should verify peak transient conditions—accounting for duty cycle, soft-start duration, and input voltage—using actual waveforms. For designs with sustained high peak loads near 5A, consider derating by 20–30% to avoid core saturation and inductance roll-off, which could destabilize feedback loops or increase EMI. Always confirm with L vs. DC bias curves from Sunlord if available.
How does the SWPA6045S4R7MT compare to Bourns SRP6045A-4R7 in terms of thermal performance and DCR for high-current power stages?
The SWPA6045S4R7MT has a maximum DCR of 34mΩ, which is lower than the Bourns SRP6045A-4R7's 42mΩ, giving it a thermal advantage in high-current applications such as VRMs or POL converters. This translates to lower I²R losses and reduced temperature rise under continuous 3A loads. However, both use similar 6.0mm x 6.0mm footprints and shielded ferrite cores, so layout substitution is feasible. Be cautious: the Bourns part has a slightly higher Isat (6.0A vs. 5.5A), so evaluate peak current needs. For thermally constrained boards, the SWPA6045S4R7MT’s lower DCR makes it preferable, but ensure PWM switching frequency stays below 24MHz (self-resonant frequency) to prevent impedance drop.
Is the SWPA6045S4R7MT a reliable drop-in replacement for TDK VLS6045EX-4R7M in existing 1MHz switching power supplies?
The SWPA6045S4R7MT can serve as a functional replacement for the TDK VLS6045EX-4R7M in most 1MHz DC-DC designs due to matching inductance (4.7µH), similar package size (6.0mm x 6.0mm), and shielding. However, verify performance across temperature and load: the TDK variant typically offers tighter inductance tolerance (±20% vs. same) and better Q-factor at high frequencies. The SWPA6045S4R7MT’s 34mΩ DCR is competitive, but lacks published Q or AC loss data. In noise-sensitive applications, measure output ripple and conducted EMI post-substitution. Also confirm footprint compatibility—though dimensions are close, slight pad layout adjustments may be needed.
What are the key risks when using the SWPA6045S4R7MT in a densely packed PCB with multiple power inductors operating above 2MHz?
The primary risks with the SWPA6045S4R7MT in high-density, high-frequency layouts are mutual coupling and thermal stress. Despite its shielded construction, placing it <5mm from adjacent inductors or traces can cause magnetic interference, leading to crosstalk or efficiency loss. Operate below its 24MHz self-resonant frequency, but caution is advised above 2MHz switching—parasitic capacitance may reduce effective impedance. Additionally, its 6x6mm footprint lacks thermal vias in standard designs; without proper copper pours, temperatures exceeding 100°C can degrade long-term reliability. Maintain minimum spacing, orient cores orthogonally, and simulate thermal gradients in high-power clusters.
How does temperature stability of the SWPA6045S4R7MT affect inductance in automotive under-hood applications near 125°C?
The SWPA6045S4R7MT is rated for operation up to 125°C, but inductance stability over temperature depends on ferrite core characteristics not fully detailed in the datasheet. In automotive under-hood environments, where ambient can exceed 100°C, the inductor may experience thermal derating due to reduced core permeability and increased DCR (copper resistance rises ~40% at 125°C). This can lower effective inductance and impact loop stability in buck converters. Designers should validate performance via thermal imaging and in-circuit testing at full load. For safety-critical systems, consider adding margin (e.g., select a 5.6µH part) or using parts with guaranteed HT performance, like Coilcraft XEL series, if stability is paramount.
Quality Assurance (QC)
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SWPA6045S4R7MT CAD Models
Shenzhen Sunlord Electronics Co., Ltd. SWPA6045S4R7MT PCB symbols & footprints
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