LanTu Micro SMRH4D28-2R2NT SMD Power Inductor Featuring Low DC Resistance and High Saturation Current
Shielded SMD Power Inductors - SMRH4D28 Series
Product Overview
The SMRH4D28 Series Shielded SMD Power Inductors are designed for surface mounting, offering a closed magnetic circuit to minimize leakage. These inductors provide high saturation current and low DC resistance, making them suitable for various power supply applications in electronic devices. Available in multiple package sizes and a wide inductance range, they comply with RoHS, Halogen Free, and REACH standards.
Product Attributes
- Brand: SHENZHEN LANTU MICRO ELECTRIC TECHNOLOGY CO., LTD.
- Series: SMRH4D28
- Type: Shielded SMD Power Inductors
- Certifications: RoHS, Halogen Free, REACH Compliance
- Magnetic Circuit Design: Closed magnetic circuit
Applications
- Power supply for VTRs
- OA equipment
- Notebook PCs
- Portable communication equipment
- DC/DC converters, DSC, DVC, MP3, PDA, products
Environmental Data
- Operating Temperature: -40 to +125 (Including coils self-temperature rise)
Technical Specifications
| Part No. | Inductance (H) | Tolerance | Test Freq. | DCR () Max | Saturation Current (A) Max | Temperature Rise Current (A) Max |
|---|---|---|---|---|---|---|
| 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 |
Dimensions
| Part No. | L (mm) Max | W (mm) Max | H (mm) Max | A (mm) Max | B (mm) Max | C (mm) | D (mm) | E (mm) |
|---|---|---|---|---|---|---|---|---|
| SMRH4D28 | 5.0 | 5.0 | 3.0 | 6.9 | 4.5 | 1.5 | 5.3 | 1.9 |
Product Identification
Format: SMRH 4D28
- Type: SMRH
- External Dimensions (LWH) (mm): 4D28 (5.05.03.0)
- Inductance: e.g., 100 for 10 H
- Inductance Tolerance: J:5%, K: 10%, L: 15%, M: 20%, P: 25%, N: 30%
- Packing: T (Tape & Reel), B (Bulk Package)
Packaging
| Part No. | Tape Dimension W (mm) | Tape Dimension P (mm) | Tape Dimension W1 (mm) | Reel Dimensions A (mm) | Reel Dimensions B (mm) | Reel Dimensions C (mm) | Reel Dimensions D (mm) | REEL (PCS) | Inside Box (PCS) | Outside Carton (PCS) |
|---|---|---|---|---|---|---|---|---|---|---|
| SMRH4D28 | 12 | 8 | 5.5 | 12.4 | 100 | 13 | 330 | 2000 | 8,000 | 32,000 |
Reliability Testing
The SMRH4D28 series undergoes various reliability tests including Terminal Strength, Resistance to Flexure, Dropping, Solderability, Vibration, Thermal Shock, Low temperature Storage, High temperature Storage, Damp Heat (Steady States), Heat endurance of Reflow soldering, Resistance to solvent test, Overload test, and Voltage resistance test, with specific requirements and test methods detailed in the original documentation.
Recommended Reflow Soldering Curve
Users are advised to adjust and confirm reflow conditions based on their specific environment and equipment, as the provided curve is based on the manufacturer's soldering equipment and conditions.
Reminders for Using These Products
- Storage: Within 12 months, at 5~40C and 35-65% RH.
- Environment: Avoid gas corrosive environments (salt, acid, alkali).
- Handling: Avoid direct contact with terminals to maintain solderability; handle carefully to prevent damage.
- Bending: Do not excessively bend terminals.
- Cleaning: Do not rinse coils; contact manufacturer if cleaning is necessary.
- Magnetic Fields: Keep away from magnets or magnetic objects.
- Preheating: Preheating is required before soldering; temperature difference between solder and chip should not exceed 150C.
- Soldering Corrections: Perform within specifications; overheating can cause issues.
- Thermal Design: Account for self-heating when power is ON.
- Non-Magnetic Shield Type: Careful layout is needed to prevent malfunction due to magnetic interference.
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