Molding SMD Power Inductors LanTu Micro SMS0518-4R7M Ultra High Current Thin Design Low DC Resistance
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Product Description
Molding SMD Power Inductors - SMS0518 Series
Product Overview
The SMS0518 Series by SHENZHEN LANTU MICRO ELECTRIC TECHNOLOGY CO., LTD. offers ultra-high current SMD power inductors with a thin design, low DC resistance, and exceptional magnetic shielding for strong anti-electromagnetic interference. Featuring an integral construction for high reliability and vibration resistance, these inductors utilize a composite structure for ultra-low buzz noise and are die-cast with low-loss alloy powder for low impedance and small parasitic capacitance. They achieve high efficiency with low winding DC resistance and core eddy-current loss, operating at frequencies up to 3MHz with a maximum insulation voltage of 30VDC. These inductors are RoHS, Halogen Free, and REACH compliant.
Product Attributes
- Brand: SHENZHEN LANTU MICRO ELECTRIC TECHNOLOGY CO., LTD.
- Series: SMS0518
- Type: Molding SMD Power Inductor
- Certifications: RoHS, Halogen Free, REACH Compliance
Technical Specifications
Key Features & Applications
- Features: Low DC resistance, ultra-high current thin design, magnetic shielding, high anti-electromagnetic interference, high reliability, high vibration resistance, integral construction, ultra-low buzz noise, low-loss alloy powder die-casting, low impedance, small parasitic capacitance, high efficiency, low eddy-current loss, frequency up to 3MHz, absolute maximum voltage 30VDC.
- Applications: PDA, notebook, desktop, server applications, high current POL converters, battery powered devices, DC/DC converters in distributed power systems.
Environmental Data
- Operating Temperature: -55 to +125 (Including coils self-temperature rise)
Test Equipment
- Inductance (L): WK3260B LCR meter or equivalent
- Saturation Current (Isat) & Heat Rating Current (Irms): WK3260B+WK3265B or equivalent
- DC Resistance (DCR): Chroma 16502 or equivalent
Product Identification
Format: SMS 0518 4R7 M T
- SMS: Series Type
- 0518: External Dimensions (LWH) in mm (5.55.21.8)
- 4R7: Inductance value (e.g., 4.7 uH)
- M: Tolerance (M: 20%)
- T: Packing Type (T: Tape & Reel)
Electrical Characteristics
| Part No. | Inductance (H) 20% | Test Frequency (KHz) | Test Voltage (V) | DCR Max (m) | Saturation Current Typical (A) | Heat Rating Current Typical (A) |
|---|---|---|---|---|---|---|
| SMS0518-R33M | 0.33 | 100 | 1.0 | 7.0 | 17.0 | 12.0 |
| SMS0518-R47M | 0.47 | 100 | 1.0 | 9.0 | 15.5 | 10.5 |
| SMS0518-R56M | 0.56 | 100 | 1.0 | 10.0 | 15.0 | 9.5 |
| SMS0518-R68M | 0.68 | 100 | 1.0 | 12.0 | 12.0 | 9.0 |
| SMS0518-1R0M | 1.00 | 100 | 1.0 | 17.0 | 9.0 | 8.0 |
| SMS0518-1R5M | 1.50 | 100 | 1.0 | 26.0 | 9.0 | 7.5 |
| SMS0518-2R2M | 2.20 | 100 | 1.0 | 35.0 | 6.5 | 5.0 |
| SMS0518-3R3M | 3.30 | 100 | 1.0 | 58.0 | 5.0 | 4.5 |
| SMS0518-4R7M | 4.70 | 100 | 1.0 | 85.0 | 4.0 | 3.5 |
| SMS0518-6R8M | 6.80 | 100 | 1.0 | 120.0 | 3.4 | 2.8 |
| SMS0518-100M | 10.00 | 100 | 1.0 | 155.0 | 3.0 | 2.5 |
| SMS0518-150M | 15.00 | 100 | 1.0 | 260.0 | 2.2 | 1.8 |
Note: Electrical specifications at 25. Saturation Current: DC current at which inductance drops 30% from its value without current. Heat Rating Current: the actual value of DC current when the temperature rise is T 40 (Ta=25). Rated DC Current: The less value which is Isat or Irms. Part temperature should be verified in the end application.
Shape and Dimensions
| Part No. | A (mm) | B (mm) | C (mm) | D (Typ) (mm) | E (Typ) (mm) | F (mm) | G (mm) | H (mm) |
|---|---|---|---|---|---|---|---|---|
| SMS0518 | 5.500.30 | 5.200.20 | 1.80Max | 2.30 | 1.20 | 3.00 | 7.00 | 2.50 |
Inductance Tolerance Options
- J: 5%
- K: 10%
- L: 15%
- M: 20%
- P: 25%
- N: 30%
Packaging
- Type: Tape & Reel (T)
- Reel Dimensions (mm): A: 13, B: 330, C: 2000 (PCS)
- Inside Box (PCS): 100
- Outside Carton (PCS): 8000
- Total Quantity per Outer Carton: 32,000
- Tape Dimensions (mm): W: 12.0, P: 8.0, W1: 5.5
Reliability Testing
| Item | Requirements | Test Methods and Remarks |
|---|---|---|
| Terminal Strength (SMT) | Meet requirements without any loose terminal. | Pulling test based on terminal area; Solder paste thickness: 0.12mm; Force applied gradually for 101s at 1.0mm/s speed. |
| Terminal Strength (DIP) | Meet requirements without any loose terminal. | Applied force based on terminal diameter (d) (5N to 40N) for 10sec. |
| Resistance to Flexure | No visible mechanical damage. | Flexure: 2mm; Speed: 0.5mm/sec; Keep time: 30 sec. |
| Dropping | No case deformation or change in appearance; No short and no open. | Drop from 1m high in 1 angle, 3 ridges and 6 surfaces, twice in each direction. |
| Solderability | Wetting shall exceed 75% coverage; Terminals must have 95% minimum solder coverage. | Solder temperature: 2402; Duration: 3 sec; Solder: Sn/3.0Ag/0.5Cu; Flux: 25% Resin and 75% ethanol. |
| Vibration | No visible mechanical damage; Inductance change: Within 10%; Q factor change: Within 20%. | Simple harmonic motion, 10 to 55 Hz, 1.5mm amplitude for 2 hours in 3 directions. |
| Thermal Shock | No visible mechanical damage; Inductance change: Within 10% (Mn-Zn: 30%); Q factor change: Within 20%. | 100 cycles of (85~125 for T time) to (-55~40 for T time). Transforming interval: Max. 20 sec. |
| Low temperature Storage | No visible mechanical damage; Inductance change: Within 10% (Mn-Zn: 30%); Q factor change: Within 20%. | Temperature: -55~-402; Duration: 962 hours. |
| High temperature Storage | No visible mechanical damage; Inductance change: Within 10% (Mn-Zn: 30%); Q factor change: Within 20%. | Temperature: 125~852; Duration: 962 hours. |
| Damp Heat (Steady States) | No visible mechanical damage; Inductance change: Within 10% (Mn-Zn: 30%); Q factor change: Within 20%. | Temperature: 602; Humidity: 90% to 95% RH; Duration: 962 hours. |
| Heat endurance of Reflow soldering | No significant defects in appearance; L/L10% (Mn-Zn: 30%); Q/Q30%; DCR/DCR10%. | Twice reflow according to recommended curve; Peak temperature: 260+0/-5. |
| Resistance to solvent test | No case deformation or change in appearance or obliteration of marking. | Dip in IPA solvent for 50.5Min, dry for 5Min, then brush 10 times. |
| Overload test | During test no smoke, no peculiar smell, no fire; Characteristics normal after test. | Apply twice rated current for 5 minutes. |
| Voltage resistance test | During test no breakdown; Characteristics normal after test. | DC1000V, Current: 1mA, Time: 1Min. (For parts with two coils) |
Recommended Reflow Soldering Curve
Note: The recommended reflow conditions are set according to specific soldering equipment. Users should adjust and confirm conditions based on their environment/equipment.
Reminders for Using These Products
- Storage: Within 12 months, temperature 5~40C, humidity 35~65% RH. Soldering of terminal electrodes may deteriorate if storage period elapses.
- Environment: Do not use or store in gas corrosive environments (salt, acid, alkali, etc.).
- Handling: Avoid direct contact with terminals by bare hands due to oil secretions. Handle products carefully to prevent damage from dropping or inappropriate removal.
- Terminal Bending: Do not bend terminals with excessive stress to prevent wire fracture.
- Cleaning: Do not rinse coils; contact the company if cleaning is necessary.
- Magnetic Fields: Do not expose products to magnets or magnetic fields.
- Preheating: Preheat components before soldering. Temperature difference between solder and chip temperature should not exceed 150C.
- Soldering Corrections: Post-mounting corrections should be within specified conditions. Overheating may cause short circuits, performance degradation, or reduced lifespan.
- Thermal Design: Allow sufficient margin for self-heating (temperature increase) when power is ON.
- Layout (Non-magnetic shield type): Careful coil layout is needed to prevent malfunctions due to magnetic interference.
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Company
Beijing Silk Road Enterprise Management Services Co., Ltd.
Location
16 Floor, Unit B, Jiatai International Mansion, No 41, Dongsihuan Zhong Road, Chaoyang District, Beijing
Contact Person
Sellina