LanTu Micro SDRI74-470MT SMD Power Inductors Featuring Closed Magnetic Circuit Design for Performance
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Product Description
Shielded SMD Power Inductors - SDRI74 Series
Product Overview
The SDRI74 Series Shielded SMD Power Inductors from SHENZHEN LANTU MICRO ELECTRIC TECHNOLOGY CO., LTD. are designed for high-performance power applications. Featuring a closed magnetic circuit design to minimize leakage, these inductors offer high saturation current and low DC resistance. Their high-accuracy dimensions are ideal for automatic mounting, and they are available in various package sizes and inductance ranges. These inductors are RoHS, Halogen Free, and REACH compliant, making them suitable for a wide array of electronic devices.
Product Attributes
- Brand: LANTU MICRO ELECTRIC TECHNOLOGY
- Origin: SHENZHEN, CHINA
- Series: SDRI74
- Certifications: RoHS, Halogen Free, REACH Compliance
- Magnetic Circuit Design: Closed Magnetic Circuit
- Mounting Type: SMD (Surface Mount Device)
- Packaging Options: Bulk Package (B), Tape & Reel (T)
Applications
- Power supply for VTRs
- LCD televisions
- Notebook PCs
- Portable communication equipment
- DC/DC converters
Technical Specifications
General Specifications:
| Item | Specification |
|---|---|
| Operating Temperature | -55 to +125 (Including coils self-temperature rise) |
| Test Equipment (Inductance) | HP4284A, HP4285A or equivalent LCR meter |
| Test Equipment (Current) | HP4284+42841A or equivalent |
| Test Equipment (Q Factor) | HP4285A or equivalent |
| Test Equipment (DCR) | Chroma 16502 or equivalent |
Product Identification Example: SDRI 74 470 M T
| Component | Description |
|---|---|
| SDRI | Type (Shielded SMD Power Inductors) |
| 74 | External Dimensions (LWH) 7.57.54.5 mm |
| 470 | Inductance (e.g., 47 uH) |
| M | Inductance Tolerance (M: 20%) |
| T | Packing (T: Tape & Reel) |
Electrical Characteristics:
| Part No. | Inductance (H) @0A | Tolerance | Test Freq. (L) | Q Min @ Test Freq. | DCR () Max | Saturation Current (A) Max | Temperature Rise Current (A) Max |
|---|---|---|---|---|---|---|---|
| SDRI74-2R2N | 2.2 | 30% | 100KHz | 30 @ 1MHz | 0.0147 | 5.20 | 5.00 |
| SDRI74-3R3N | 3.3 | 30% | 100KHz | 30 @ 1MHz | 0.0214 | 4.60 | 4.00 |
| SDRI74-4R7N | 4.7 | 30% | 100KHz | 30 @ 1MHz | 0.0310 | 3.80 | 3.40 |
| SDRI74-6R8N | 6.8 | 30% | 100KHz | 30 @ 1MHz | 0.035 | 3.20 | 2.30 |
| SDRI74-8R2N | 8.2 | 30% | 100KHz | 30 @ 1MHz | 0.042 | 3.00 | 2.10 |
| SDRI74-100N | 10 | 30% | 100KHz | 35 @ 1MHz | 0.049 | 2.95 | 1.84 |
| SDRI74-120M | 12 | 20% | 100KHz | 35 @ 1MHz | 0.058 | 2.85 | 1.71 |
| SDRI74-150M | 15 | 20% | 100KHz | 35 @ 1MHz | 0.081 | 2.80 | 1.47 |
| SDRI74-180M | 18 | 20% | 100KHz | 35 @ 1MHz | 0.091 | 2.50 | 1.31 |
| SDRI74-220M | 22 | 20% | 100KHz | 35 @ 1MHz | 0.110 | 2.10 | 1.23 |
| SDRI74-270M | 27 | 20% | 100KHz | 35 @ 1MHz | 0.150 | 1.90 | 1.12 |
| SDRI74-330M | 33 | 20% | 100KHz | 35 @ 1MHz | 0.170 | 1.80 | 0.96 |
| SDRI74-390M | 39 | 20% | 100KHz | 35 @ 1MHz | 0.230 | 1.70 | 0.91 |
| SDRI74-470M | 47 | 20% | 100KHz | 35 @ 1MHz | 0.260 | 1.50 | 0.88 |
| SDRI74-560M | 56 | 20% | 100KHz | 35 @ 1MHz | 0.350 | 1.32 | 0.75 |
| SDRI74-680M | 68 | 20% | 100KHz | 35 @ 1MHz | 0.380 | 1.08 | 0.69 |
| SDRI74-820M | 82 | 20% | 100KHz | 35 @ 1MHz | 0.430 | 1.05 | 0.61 |
| SDRI74-101M | 100 | 20% | 100KHz | 40 @ 0.796MHz | 0.610 | 1.02 | 0.60 |
| SDRI74-121M | 120 | 20% | 100KHz | 40 @ 0.796MHz | 0.660 | 0.98 | 0.52 |
| SDRI74-151M | 150 | 20% | 100KHz | 40 @ 0.796MHz | 0.880 | 0.95 | 0.46 |
| SDRI74-181M | 180 | 20% | 100KHz | 40 @ 0.796MHz | 0.980 | 0.74 | 0.42 |
| SDRI74-221M | 220 | 20% | 100KHz | 40 @ 0.796MHz | 1.170 | 0.70 | 0.36 |
| SDRI74-271M | 270 | 20% | 100KHz | 40 @ 0.796MHz | 1.640 | 0.57 | 0.34 |
| SDRI74-331M | 330 | 20% | 100KHz | 40 @ 0.796MHz | 1.860 | 0.56 | 0.32 |
| SDRI74-391M | 390 | 20% | 100KHz | 40 @ 0.796MHz | 2.850 | 0.45 | 0.29 |
| SDRI74-471M | 470 | 20% | 100KHz | 40 @ 0.796MHz | 3.010 | 0.45 | 0.26 |
| SDRI74-561M | 560 | 20% | 100KHz | 40 @ 0.796MHz | 3.620 | 0.43 | 0.23 |
| SDRI74-681M | 680 | 20% | 100KHz | 40 @ 0.796MHz | 4.630 | 0.37 | 0.22 |
| SDRI74-821M | 820 | 20% | 100KHz | 40 @ 0.796MHz | 5.200 | 0.35 | 0.20 |
| SDRI74-102M | 1000 | 20% | 100KHz | 40 @ 0.796MHz | 6.000 | 0.33 | 0.18 |
Definitions:
- Saturation Current: DC current at which inductance drops 30% 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 and Irms.
Dimensions (mm):
| Part No. | A (L) | B (W) | C (H) | D | E | F | G | H |
|---|---|---|---|---|---|---|---|---|
| SDRI74 | 7.5 Max | 7.5 Max | 4.5 Max | 1.8 | 5.0 | 1.6 | 4.8 | 2.2 |
Recommended Land Pattern: (Refer to image in source document)
Packaging:
- Tape and Reel Specifications: (Dimensions are in mm, refer to images in source document)
- Reel Dimensions: (Refer to image in source document)
- Tape Dimension: (Refer to image in source document)
- Cover tape peel off condition: Cover tape peel force 10 to 120g; Noodle strip peeling angle 165 to 180.
- Packing Quantity:
| Part No. | Tape Dimension W | P | H | Reel Dimensions A | B | C | D | REEL (PCS) | Inside Box (PCS) | Outside Carton (PCS) |
|---|---|---|---|---|---|---|---|---|---|---|
| SDRI74 | 16 | 12 | 11.5 | 16.5 | 100 | 13 | 330 | 1000 | 3000 | 12,000 |
Reliability Testing: (Refer to source document for detailed test methods and requirements)
- Terminal Strength
- Resistance to Flexure
- Dropping Test
- Solderability
- Vibration Test
- Thermal Shock
- Low Temperature Storage
- High Temperature Storage
- Damp Heat (Steady States)
- Heat endurance of Reflow soldering
- Resistance to solvent test
- Overload test
- Voltage resistance test
Recommended Reflow Soldering Curve: (Refer to graph in source document for recommended conditions)
Reminders for Using These Products:
- Storage period: within 12 months. Storage conditions: temperature 5~40C, humidity 35~65% RH or less.
- Do not use or store in environments with gas corrosion (salt, acid, alkali, etc.).
- Avoid direct contact with terminals by bare hands due to oil secretions.
- Handle products carefully to prevent damage from dropping or inappropriate removal.
- Do not bend terminals with excessive stress.
- Do not rinse coils by yourself; contact the manufacturer if cleaning is necessary.
- Do not expose products to magnets or magnetic fields.
- Preheat components before soldering; temperature difference between solder and chip temperature should not exceed 150C.
- Soldering corrections after mounting should be within specified conditions. Overheating may cause short circuits, performance degradation, or lifespan reduction.
- Allow sufficient thermal design margin for self-heating when power is ON.
- For non-magnetic shielded types, carefully lay out coils on the PCB to prevent malfunctions due to magnetic interference.
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