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.
2410121442_LanTu-Micro-SMRH4D28-3R3NT_C5127346.pdf
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