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Compact High Current 330 SMD Power Inductor Low DCR Stable for DC DC Converter
The 330 marking commonly represents a nominal inductance of 33 µH. The following values represent typical project-discussion requirements used by international buyers when evaluating a molded SMD power inductor.
Rated current, saturation current, DCR, temperature rise, and package dimensions cannot be determined by the 330 marking alone. Final ratings depend on the package size, magnetic material, internal conductor, winding structure, operating frequency, DC bias, ripple current, cooling conditions, and allowable temperature rise.
Industry Applications Overview
Industry
Typical Application
Typical Inductance
Current Range
Switching Frequency
Key Parameters
Industrial DC DC Converter
Buck, boost, and isolated-converter output filtering
33 µH nominal
1 to 10 A
100 kHz to 1 MHz
Inductance under DC bias, saturation current, RMS current, DCR
Industrial Automation
PLC modules, controllers, sensors, actuators
33 µH
0.5 to 8 A
100 kHz to 1 MHz
Inductance stability, DCR, efficiency, EMI
Solar and Energy Storage
BMS, communication control board, gate-driver support
The 330 Molded Power SMD Inductor is a compact surface-mount magnetic component designed for energy storage, current smoothing, ripple filtering, and EMI reduction in switching power supplies.
The 330 top marking commonly indicates a nominal inductance of 33 µH. However, the marking does not define the complete specification. Two inductors with the same 330 marking may have different:
Package dimensions
Inductance tolerances
Saturation currents
RMS current ratings
DCR values
Magnetic materials
Temperature-rise limits
Product Construction
Construction Item
Standard Reference or Custom Option
Product Type
Molded SMD power inductor
Top Marking
330
Common Marking Interpretation
33 µH nominal inductance
Magnetic Structure
Molded shielded magnetic body
Magnetic Material
Application-specific magnetic composite
Internal Winding
Enameled copper winding
Terminal Type
Integrated surface-mount terminals
Key Characteristics
Compact Molded Construction: Integrated molded body combines magnetic material and winding for high-density PCB layouts
High Current Capability: Optimized for required RMS and peak currents
Low DCR Options: Reduced conduction loss and voltage drop
Stable Inductance Under DC Bias: Maintains useful inductance as DC current increases
Magnetic Shielding: Reduced stray magnetic flux compared to unshielded inductors
Applications
Industrial DC DC converters
Buck and boost converters
Point-of-load regulators
PLC control boards
Solar inverter control electronics
EV charging electronics
Telecom power modules
Server power supplies
Medical equipment
LED drivers
Quality Assurance
Our comprehensive quality control includes incoming material inspection, design review, in-process control, electrical testing, thermal validation, mechanical inspection, and sample validation to ensure product reliability and performance.
Frequently Asked Questions
Q1: What does the 330 marking mean?
The 330 marking commonly represents 33 µH. The first two digits are significant figures and the final digit indicates the number of zeros in microhenries. Always check the approved datasheet as marking systems can vary.
Q2: Does 330 define the package size?
No. The marking normally identifies inductance rather than physical dimensions. Package size and footprint must be confirmed through the drawing.
Q3: Is the rated current fixed for every 330 inductor?
No. Rated current depends on package size, conductor DCR, magnetic material, temperature-rise criterion, PCB copper area, and cooling conditions.
Product Image
Why Choose Chipsen
Application-Specific Customization: Developed around your actual electrical and thermal requirements
OEM and ODM Support: Full customization of specifications and packaging
Engineering Collaboration: Technical review of all critical parameters
Prototype Support: MOQ of 100 pieces with prototype quantities available
Responsive Project Handling: Drawing target within 3 days, samples within 7 days
Warranty Support: Standard 5-year warranty with extended options available
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer
Year Established:
2007
Total Annual:
28820000-29820000
Employee Number:
400~450
Ecer Certification：
Verified Supplier
Chipsen Electronics - Supplier to Fortune Global 500 Companies
Magnetic Components Engineered for Performance & Reliability
Founded in 2007, Dongguan Chipsen Electronics Technology Co., Ltd. is a professional manufacturer specializing in magnetic components and micro switches.
...
Chipsen Electronics - Supplier to Fortune Global 500 Companies
Magnetic Components Engineered for Performance & Reliability
Founded in 2007, Dongguan Chipsen Electronics Technology Co., Ltd. is a professional manufacturer specializing in magnetic components and micro switches.
...
