Silver Plated LanTu Micro SCD3521-680MT Unshielded SMD Power Inductors with Design and High Rated Current
Unshielded SMD Power Inductors - SCD3521 Series
Product Overview
The SCD3521 Series from SHENZHEN LANTU MICRO ELECTRIC TECHNOLOGY CO., LTD. offers unshielded SMD power inductors designed for surface mounting. These low-cost, silver-plated inductors feature a small size with high rated current and low DC resistance. They are suitable for a wide range of applications including VTRs, LCD televisions, notebook PCs, portable communication equipment, and DC/DC converters. The series operates within a temperature range of -40 to +125 (including coil self-temperature rise) and complies with RoHS, Halogen Free, and REACH standards.
Product Attributes
- Brand: SHENZHEN LANTU MICRO ELECTRIC TECHNOLOGY CO., LTD.
- Series: SCD3521
- Type: Unshielded SMD Power Inductors (Unshielded magnetic circuit chip inductors)
- Design: Silver plated type, Low cost design
- Certifications: RoHS, Halogen Free, REACH Compliance
- Packaging Options: Bulk Package (B), Tape & Reel (T)
Technical Specifications
Product Identification: SCD 3521 [Inductance] [Tolerance] [Packing]
Example Part Numbering: SCD3521-100M T (SCD3521 Series, 10 H, 20% Tolerance, Tape & Reel)
| Part No | Inductance (H) @ 0A | 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 |
Inductance Tolerance Options: J:5%, K: 10%, L: 15%, M: 20%, P: 25%, N: 30%
Environmental Data:
- Operating Temperature: -40 to +125 (Including coils self-temperature rise)
Test Equipment:
- Inductance (L): HP4284A, HP4285A or equivalent LCR meter
- 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
Shape and Dimensions (mm):
| Part No | A | B | C | D | H | I | J |
|---|---|---|---|---|---|---|---|
| SCD3521 | 3.50.3 | 3.00.3 | 2.10.3 | 1.0 | 3.5 | 1.6 | 0.8 |
Key Definitions:
- Saturation Current: DC current at which inductance drops 10% from its value without current.
- Temperature Rise Current: The actual value of DC current when the temperature rise is T 40 (Ta=25).
- Rated DC Current: The lesser value between Isat or Irms.
- Special Remind: Circuit design, component, PCB trace size and thickness, airflow, and other cooling provisions all affect the part temperature. Part temperature should be verified in the end application.
Recommended Land Pattern: (Image not available in text, refer to datasheet for visual representation)
Product Packaging:
Tape and Reel Specifications: (Dimensions are in mm) (Visual representation of tape and reel dimensions, reel dimensions, and cover tape peel off conditions are described but not visually rendered here. Refer to datasheet for details.)
| Part No. | Tape Dimension W (mm) | P (mm) | W1 (mm) | Reel Dimensions A (mm) | B (mm) | C (mm) | D (mm) | REEL (PCS) | Inside Box (PCS) | Outside Carton (PCS) | Total Quantity (PCS) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| SCD3521 | 12 | 8 | 5.5 | 12.4 | 100 | 13 | 330 | 3000 | 12000 | 48,000 |
Reminders for Using These Products:
- Storage: Within 12 months, under conditions of 5~40C and 35~65% RH. Solderability may deteriorate beyond this period.
- Environment: Avoid use and storage in corrosive gas environments (salt, acid, alkali, etc.).
- Handling: Avoid direct contact with terminals with bare hands due to grease affecting solderability. Handle products carefully to prevent damage from dropping.
- Terminal Bending: Do not bend terminals excessively to avoid wire fracture.
- Cleaning: Do not rinse coils without contacting the manufacturer.
- Magnetic Fields: Do not expose products to magnets or magnetic fields.
- Preheating: Preheat components before soldering. Temperature difference between solder and chip should not exceed 150C.
- Soldering Corrections: Perform soldering corrections within specified conditions. Overheating can lead to short circuits, performance degradation, and reduced lifespan.
- Self-Heating: Allow sufficient thermal design margin as components generate heat when energized.
- Layout: For non-magnetic shield types, careful PCB layout is required to prevent malfunctions due to magnetic interference.
Reliability Testing: (Detailed test items, requirements, and methods are listed in the original document, 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. Specific criteria for inductance change, Q factor change, etc., are provided for each test.)
Recommended Reflow Soldering Curve: (Refer to the original document for the graphical representation and specific parameters.)
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