Surface Mount Shielded SMD Power Inductors LanTu Micro SMRH4D28-3R3NT with Wide Inductance Range and Low DCR
Shielded SMD Power Inductors
Product Overview
The SMRH4D28 Series Shielded SMD Power Inductors from SHENZHEN LANTU MICRO ELECTRIC TECHNOLOGY CO., LTD. are designed for surface mounting applications. They feature a closed magnetic circuit design to reduce leakage flux, high saturation current, and low DCR. Available in various package sizes and a wide inductance range, these inductors are RoHS, Halogen Free, and REACH compliant, making them suitable for power supplies in VTRs, OA equipment, Notebook PCs, portable communication equipment, and DC/DC converters.
Product Attributes
- Brand: LANTU MICRO ELECTRIC TECHNOLOGY CO., LTD.
- Series: SMRH4D28
- Type: Shielded SMD Power Inductors
- Certifications: RoHS, Halogen Free, REACH Compliance
- Origin: Shenzhen, China (Implied by company name and location)
Technical Specifications
| Part No. | Inductance (H) | Tolerance | Test Freq. | DCR () Max | Saturation Current (A) Max (Isat) | Temperature Rise Current (A) Max (Irms) |
|---|---|---|---|---|---|---|
| SMRH4D28-1R5N | 1.5 | 30% | 100KHz | 0.023 | 2.56 | 2.56 |
| SMRH4D28-2R2N | 2.2 | 30% | 100KHz | 0.031 | 2.04 | 2.04 |
| SMRH4D28-3R3N | 3.3 | 30% | 100KHz | 0.049 | 1.57 | 1.57 |
| SMRH4D28-3R9N | 3.9 | 30% | 100KHz | 0.064 | 1.44 | 1.44 |
| SMRH4D28-4R7N | 4.7 | 30% | 100KHz | 0.072 | 1.32 | 1.32 |
| SMRH4D28-6R8N | 6.8 | 30% | 100KHz | 0.441 | 1.12 | 1.12 |
| SMRH4D28-8R2N | 8.2 | 30% | 100KHz | 0.694 | 1.04 | 1.04 |
| SMRH4D28-100N | 10 | 30% | 100KHz | 0.709 | 1.00 | 1.00 |
| SMRH4D28-120M | 12 | 20% | 100KHz | 0.131 | 0.84 | 0.84 |
| SMRH4D28-150M | 15 | 20% | 100KHz | 0.149 | 0.76 | 0.76 |
| SMRH4D28-180M | 18 | 20% | 100KHz | 0.166 | 0.72 | 0.72 |
| SMRH4D28-220M | 22 | 20% | 100KHz | 0.235 | 0.70 | 0.70 |
| SMRH4D28-270M | 27 | 20% | 100KHz | 0.261 | 0.58 | 0.58 |
| SMRH4D28-330M | 33 | 20% | 100KHz | 0.378 | 0.56 | 0.56 |
| SMRH4D28-390M | 39 | 20% | 100KHz | 0.383 | 0.50 | 0.50 |
| SMRH4D28-470M | 47 | 20% | 100KHz | 0.587 | 0.48 | 0.48 |
| SMRH4D28-560M | 56 | 20% | 100KHz | 0.624 | 0.41 | 0.41 |
| SMRH4D28-680M | 68 | 20% | 100KHz | 0.699 | 0.35 | 0.35 |
| SMRH4D28-820M | 82 | 20% | 100KHz | 0.914 | 0.32 | 0.32 |
| SMRH4D28-101M | 100 | 20% | 100KHz | 1.102 | 0.29 | 0.29 |
| SMRH4D28-121M | 120 | 20% | 100KHz | 1.127 | 0.27 | 0.27 |
| SMRH4D28-151M | 150 | 20% | 100KHz | 1.135 | 0.24 | 0.24 |
| SMRH4D28-181M | 180 | 20% | 100KHz | 1.154 | 0.22 | 0.22 |
Environmental Data:
- Operating Temperature: -40 to +125 (Including coils self-temperature rise)
Dimensions:
| Part No. | A (Max) | B (Max) | C (Max) | D (Max) | E (Max) | F | G | H | J |
|---|---|---|---|---|---|---|---|---|---|
| SMRH4D28 | 5.0 | 5.0 | 3.0 | 6.9 | 4.5 | 1.5 | 5.3 | 1.9 | 1.5 |
(Dimensions are in mm)
Product Model Identification: SMRH 4D28 [Inductance] [Tolerance] [Packing]
- Inductance Tolerance: J:5%, K: 10%, L: 15%, M: 20%, P: 25%, N: 30%
- Packing: T (Tape & Reel), B (Bulk Package)
Packaging:
- Tape and Reel Specifications: W=12mm, P=8mm, W1=5.5mm
- Reel Dimensions: A=13 inches, B=2.0mm, C=330mm, D=1.5mm
- Packing Quantity: REEL (PCS): 2000, Inside Box (PCS): 8,000, Outside Carton (PCS): 32,000
Reliability Testing:
- Terminal Strength (SMT/DIP)
- 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: Conditions to be adjusted and confirmed according to user's environment/equipment.
Reminders for Using These Products:
- Storage period within 12 months under conditions (5~40C, 35-65% RH).
- Avoid use and storage in corrosive gas environments.
- Avoid direct contact with terminals to maintain solderability.
- Handle with care to prevent damage.
- Do not bend terminals excessively.
- Do not rinse coils; contact manufacturer if cleaning is required.
- Keep away from magnets or magnetic fields.
- Preheat components before soldering; temperature difference between solder and chip should not exceed 150C.
- Soldering corrections after mounting should be within specified conditions to avoid performance degradation.
- Allow for sufficient thermal design margin due to self-heating.
- For non-magnetic shielded types, careful coil layout is required to prevent malfunction due to magnetic interference.
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