SMD 330 Shielded Power Inductor 33uH High Current SMT Coil For DC-DC Converters
Price:
US$0.03-0.1
MOQ:
10,000pcs
Delivery Time:
3~4 Weeks
Brand:
Chipsen
Product Description
SMD 330 Shielded Power Inductor 33uH High Current SMT Coil For DC-DC Converters
The SMD 330 power inductor is a magnetically shielded, surface-mount (SMT) power choke marked "330", which stands for a nominal inductance of 33µH. It uses a ferrite drum core wrapped in a moulded magnetic resin body, giving low EMI radiation, low DCR and a flat square top surface that is ideal for automatic pick-and-place and vacuum-nozzle handling.
Typical use is the energy-storage inductor in DC-DC buck/boost converters, switching power supplies (SMPS), LED drivers and on-board power modules. Custom inductance (1µH–1000µH), size, current rating and packaging are available from our own winding and moulding lines.
Key Features
- Magnetically shielded structure — closed magnetic circuit sharply reduces EMI/crosstalk, allowing dense layout next to MOSFETs and ICs
- Low DCR, high efficiency — enamelled copper wire winding lowers copper loss and self-heating, improving DC-DC conversion efficiency
- High saturation current — stable inductance under load transients, suitable for high ripple-current switching topologies
- Wide operating temperature — −40°C to +125°C (including self-temperature rise), fit for industrial and automotive-grade environments
- SMT & reflow ready — flat top surface for pick-and-place, lead-free reflow up to 260°C, tape-and-reel packaging
- Full customization — inductance, footprint, DCR, current rating, marking and reel quantity made to your drawing or sample
- Quality system — produced under ISO 9001/IATF 16949 process control, RoHS & REACH compliant, 100% LCR and appearance inspection before shipment
Technical Specifications
| Product Name | SMD Shielded Power Inductor (SMT Power Choke) |
|---|---|
| Model / Marking | SMD330 / printed code "330" |
| Inductance | 33µH (code 330), tolerance ±20% (±10% / ±15% optional) |
| Test Frequency | 100kHz / 0.1V (LCR meter) |
| Available Footprints | CD43 / CD54 / CD75 / CD104 / CD127 series (4*4mm up to 12*12mm), height 1.8–8.0mm |
| Inductance Range (series) | 1µH – 1000µH, customizable |
| Core Material | Ferrite drum core + magnetic shielding resin |
| Wire | Enamelled copper wire (Class F / H), full-copper construction |
| Terminal / Plating | Tin-plated, lead-free, solderability ≥95% |
| Operating Temperature | −40°C to +125°C (ambient + temperature rise) |
| Mounting | SMD / SMT, reflow soldering peak 260°C / 10s |
| Packaging | Tape & reel, anti-static, quantity per reel by size |
| Compliance | RoHS, REACH; ISO 9001 / IATF 16949 manufacturing |
| Origin / Supply | China, factory direct, OEM & ODM welcome |
Note: rated current, saturation current and DCR vary with the selected footprint. Please contact us for the full datasheet of the exact size you need.
Applications
- DC-DC buck/boost converters and POL power modules
- Switching power supplies (SMPS), adapters and chargers
- LED lighting drivers and dimmable drivers
- Motherboards, graphic cards, servers and telecom power boards
- Consumer electronics: TV, set-top box, router, camera modules
- New energy & industrial: photovoltaic optimizers, UPS, EV on-board chargers (OBC), BMS
Why Choose Us
- Direct manufacturer with in-house winding, moulding and testing — no trading middleman
- Engineering support: inductance/DCR/temperature-rise simulation and free samples for evaluation
- Stable monthly capacity under MTO (make-to-order) mode, mass-production lead time 15–25 days
- 100% electrical test, full traceability and detailed inspection report with each shipment
FAQ
Q1: What does the "330" marking on the inductor mean?
A: It is the EIA inductance code. The first two digits are significant figures and the third is the power of ten, so "330" = 33 * 100 = 33µH.
Q2: Is this a shielded or unshielded inductor?
A: It is magnetically shielded. The drum core is encapsulated in magnetic resin, which closes the magnetic path and reduces EMI, so it can be placed close to sensitive signal traces.
Q3: Can I get a different inductance or package size?
A: Yes. We produce 1µH–1000µH in CD43 to CD127 footprints, and can adjust DCR, rated current, height and marking according to your drawing or reference sample.
Q4: What is the MOQ and can I get samples first?
A: Standard items support low-volume trial orders, and free samples are available for qualified engineering evaluation; customers only cover the courier cost.
Q5: How is the product packed and shipped?
A: Anti-static tape & reel in cartons, supporting EXW / FOB / CIF terms by sea, air or express courier.
Q6: Do you provide datasheets and compliance documents?
A: Yes — datasheet, RoHS / REACH declarations and test reports are provided on request before or with the order.
Need a quotation? Send us the inductance, size limit, rated current and annual usage, and our engineers will reply with a matched part number, datasheet and tiered price within 12 working hours.
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Dongguan Chipsen Electronics Technology Co., Ltd.
Location
No. 234, Changhuang Road, Changping Town, 523586, Dongguan, Guangdong, China
Contact Person
Nick Cheng