Unshielded SMD Power Inductors - SCD3521 Series
Product Overview
The SCD3521 Series Unshielded SMD Power Inductors from SHENZHEN LANTU MICRO ELECTRIC TECHNOLOGY CO., LTD. are designed for surface mounting applications, offering a low-cost, silver-plated solution. These inductors feature a small size with high rated current capability and low DC resistance, making them suitable for DC/DC converters and power supplies in various electronic devices such as VTRs, LCD televisions, notebook PCs, and portable communication equipment. They are compliant with RoHS, Halogen Free, and REACH standards.
Product Attributes
- Brand: LANTU MICRO ELECTRIC TECHNOLOGY
- Origin: SHENZHEN, CHINA
- Type: Unshielded SMD Power Inductors
- Certifications: RoHS, Halogen Free, REACH Compliance
- Design: Silver plated type, Low cost design
- Circuitry: Unshielded magnetic circuit
- Packaging: Bulk Package (B), Tape & Reel (T)
Technical Specifications
| Part No. | Inductance (H) | Tolerance | Test Freq @ 0A | SRF Typ (MHz) | DCR Typ () Max | Saturation Current (A) Max (Isat) | Temperature Rise Current (A) Max (Irms) | Dimensions (LWH) (mm) |
|---|---|---|---|---|---|---|---|---|
| SCD3521-1R0M | 1.0 | M (20%) | 100KHz | 120 | 0.045 | 3.30 | 2.20 | 3.52.1 |
| SCD3521-1R2M | 1.2 | M (20%) | 100KHz | 100 | 0.050 | 3.00 | 2.10 | 3.52.1 |
| SCD3521-1R5M | 1.5 | M (20%) | 100KHz | 85 | 0.055 | 2.70 | 1.70 | 3.52.1 |
| SCD3521-1R8M | 1.8 | M (20%) | 100KHz | 75 | 0.070 | 2.50 | 1.65 | 3.52.1 |
| SCD3521-2R2M | 2.2 | M (20%) | 100KHz | 62 | 0.085 | 2.30 | 1.60 | 3.52.1 |
| SCD3521-2R7M | 2.7 | M (20%) | 100KHz | 53 | 0.100 | 2.20 | 1.40 | 3.52.1 |
| SCD3521-3R3M | 3.3 | M (20%) | 100KHz | 47 | 0.120 | 1.95 | 1.04 | 3.52.1 |
| SCD3521-3R9M | 3.9 | M (20%) | 100KHz | 41 | 0.125 | 1.85 | 1.00 | 3.52.1 |
| SCD3521-4R7M | 4.7 | M (20%) | 100KHz | 38 | 0.135 | 1.60 | 1.00 | 3.52.1 |
| SCD3521-5R6M | 5.6 | M (20%) | 100KHz | 33 | 0.145 | 1.55 | 0.95 | 3.52.1 |
| SCD3521-6R8M | 6.8 | M (20%) | 100KHz | 31 | 0.200 | 1.40 | 0.95 | 3.52.1 |
| SCD3521-8R2M | 8.2 | M (20%) | 100KHz | 27 | 0.250 | 1.20 | 0.92 | 3.52.1 |
| SCD3521-100M | 10 | M (20%) | 100KHz | 23 | 0.320 | 1.05 | 0.90 | 3.52.1 |
| SCD3521-120M | 12 | M (20%) | 100KHz | 21 | 0.350 | 1.00 | 0.85 | 3.52.1 |
| SCD3521-150M | 15 | M (20%) | 100KHz | 19 | 0.460 | 0.90 | 0.75 | 3.52.1 |
| SCD3521-180M | 18 | M (20%) | 100KHz | 17 | 0.520 | 0.80 | 0.70 | 3.52.1 |
| SCD3521-220M | 22 | M (20%) | 100KHz | 15 | 0.650 | 0.75 | 0.60 | 3.52.1 |
| SCD3521-270M | 27 | M (20%) | 100KHz | 14 | 0.750 | 0.70 | 0.55 | 3.52.1 |
| SCD3521-330M | 33 | M (20%) | 100KHz | 12 | 0.920 | 0.60 | 0.50 | 3.52.1 |
| SCD3521-390M | 39 | M (20%) | 100KHz | 11 | 1.120 | 0.55 | 0.48 | 3.52.1 |
| SCD3521-470M | 47 | M (20%) | 100KHz | 10 | 1.270 | 0.50 | 0.45 | 3.52.1 |
| SCD3521-560M | 56 | M (20%) | 100KHz | 9.3 | 1.500 | 0.45 | 0.30 | 3.52.1 |
| SCD3521-680M | 68 | M (20%) | 100KHz | 8.4 | 2.000 | 0.40 | 0.26 | 3.52.1 |
| SCD3521-820M | 82 | M (20%) | 100KHz | 7.5 | 2.150 | 0.35 | 0.23 | 3.52.1 |
| SCD3521-101M | 100 | M (20%) | 100KHz | 6.8 | 2.800 | 0.34 | 0.20 | 3.52.1 |
| SCD3521-121M | 120 | M (20%) | 100KHz | 6.2 | 3.400 | 0.33 | 0.18 | 3.52.1 |
| SCD3521-151M | 150 | M (20%) | 100KHz | 5.5 | 4.200 | 0.28 | 0.16 | 3.52.1 |
| SCD3521-181M | 180 | M (20%) | 100KHz | 5.0 | 4.500 | 0.27 | 0.15 | 3.52.1 |
| SCD3521-221M | 220 | M (20%) | 100KHz | 4.5 | 5.700 | 0.25 | 0.14 | 3.52.1 |
| SCD3521-271M | 270 | M (20%) | 100KHz | 4.0 | 8.500 | 0.22 | 0.10 | 3.52.1 |
| SCD3521-331M | 330 | M (20%) | 100KHz | 3.6 | 9.500 | 0.19 | 0.09 | 3.52.1 |
Environmental Data
- Operating Temperature: -40 to +125 (Including coils self-temperature rise)
Test Equipment
- Inductance (L): HP4284A, HP4285A LCR meter or equivalent
- Saturation Current (Isat) & Temperature Rise Current (Irms): HP4284+42841A or equivalent
- Self-Resonant Frequency (SRF): Agilent E4991A or equivalent
- DC Resistance (DCR): Chroma 16502 or equivalent
Product Identification
SCD 3521 - [Inductance Value] [Tolerance Code] [Packing Code]
- Type Code: SCD (Unshielded SMD Power Inductors)
- Series: 3521
- Inductance: e.g., 100 (10 H)
- Tolerance: J:5%, K: 10%, L: 15%, M: 20%, P: 25%, N: 30%
- Packing: B (Bulk Package), T (Tape & Reel)
Dimensions
| Part No. | A (mm) | B (mm) | C (mm) | D (mm) | H (mm) | I (mm) | J (mm) |
|---|---|---|---|---|---|---|---|
| SCD3521 | 3.50.3 | 3.00.3 | 2.10.3 | 1.0 | 3.5 | 1.6 | 0.8 |
Recommended Land Pattern
(Refer to diagram in source document)
Product Packaging
Tape and Reel Specifications: (Dimensions are in mm - Refer to diagrams in source document)
- Tape Dimension: W, P, W1
- Reel Dimensions: A, B, C, D
- Cover tape peel off condition: Peel force 10 to 120g, Peel angle 165 to 180
- Packing Quantity: PE Bag, Inside Box, Outside Carton
Reliability Testing
The SCD3521 series undergoes various reliability tests including Terminal Strength, Resistance to Flexure, Dropping, Solderability, Vibration, Thermal Shock, Low Temperature Storage, High Temperature Storage, Damp Heat, Heat endurance of Reflow soldering, Resistance to solvent, Overload test, and Voltage resistance test, with specific requirements and test methods detailed in the source document.
Recommended Reflow Soldering Curve
Refer to the recommended reflow soldering curve provided in the source document. Users should adjust and confirm conditions based on their specific equipment and process.
Reminders for Using These Products
- Storage: Within 12 months, under 5~40C and 35~65% RH.
- Environment: Avoid gas corrosive environments (salt, acid, alkali).
- Handling: Avoid direct contact with terminals due to hand grease. Handle carefully to prevent damage.
- Bending: Do not excessively bend terminals.
- Cleaning: Do not rinse coils; contact manufacturer if cleaning is required.
- Magnetism: Keep away from magnets or magnetic fields.
- Preheating: Preheat components before soldering; temperature difference between solder and chip should not exceed 150C.
- Soldering Corrections: Perform within specified conditions to avoid performance degradation or reduced lifespan.
- Thermal Design: Account for self-heating when power is on.
- Layout: For non-magnetic shield types, careful PCB layout is needed to prevent malfunctions due to magnetic interference.
2410121451_LanTu-Micro-SCD3521-6R8MT_C5127246.pdf
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