# Power Inductor (SMD), 4.7 µH, 1.7 A, Shielded, 2 A, WLPN404018 Series

![Product image](https://novapart.co/image/farnell:2771305/)

**URL**: https://novapart.co/products/WLPN404018M4R7LB/power-inductor-smd-47-h-17-a-shielded-2-wlpn404018
**SKU**: WLPN404018M4R7LB
**Manufacturer**: MULTICOMP PRO
**Category**: Passive Components || Inductors || Power Inductors || SMD Power Inductors
**Price**: €0.0700
**Stock**: 10+

## Description

Inductance:4.7µH; RMS Current (Irms):1.7A; Inductor Construction:Shielded; Saturation Current (Isat):2A; Product Range:WLPN404018 Series; Power Inductor Case:4mm x 4mm x 1.8mm; DC Re

## Specifications

| Parameter | Value |
|---|---|
| Svhc | No SVHC (04-Feb-2026) |
| Inductance | 4.7µH |
| Product Range | WLPN404018 Series |
| Product Width | 4mm |
| Product Height | 1.8mm |
| Product Length | 4mm |
| Dc Resistance Max | 0.07ohm |
| Rms Current (Irms) | 1.7A |
| Power Inductor Case | 4mm x 4mm x 1.8mm |
| Inductance Tolerance | ± 20% |
| Inductor Construction | Shielded |
| Inductor Case / Package | - |
| Saturation Current (Isat) | 2A |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:2771305/)

## **Shielded SMD Power Inductors** 

## **Features** 

- Close magnetic loop with magnetic resin shielded. 

- Low profile, High inductance. 

## **Applications** 

- General propose power inductor in DC power system. 

- Inductor in DC/DC converter. 

- Low profile for portable and wearable device. 

- LC filter in Audio D class Amplifier. 

## **Electrical Characteristics** 

|**WLPN404018**<br>**Series**<br>~~ft~~<br>~~es~~|**L**<br>**(uH)**<br>~~ft~~<br>~~es Ge~~|**Symbol**<br>~~ft |~~<br>~~Ge~~|**Inductance**<br>**Tolerance**<br>~~|~~<br>~~es~~|**DCR**<br>**(Ω±20%)**<br>~~nO~~|**SRF**<br>**(MHz)Min**<br>~~pe~~<br>~~nO~~|**Rated Current(mA) Max**<br>~~pe~~|**Rated Current(mA) Max**<br>~~pe~~|
|---|---|---|---|---|---|---|---|
|||||||**Saturation**<br>**Current**<br>**Idc1**<br>~~pe~~<br>~~nO~~|**Temperature**<br>**Rise Current**<br>**Idc2**<br>~~pe~~<br>~~nO~~|
|WLPN404018N1R0LB<br>~~ft~~<br>~~es~~<br>~~es~~|1<br>~~ft~~<br>~~es Ge~~<br>~~es Ge~~|A<br>~~ft |~~<br>~~Ge~~<br>~~Ge (es~~|±30%<br>~~|~~<br>~~es~~<br>~~(es~~|0.027<br>~~nO~~<br>~~nn~~|90<br>~~pe~~<br>~~nO~~<br>~~OO~~|4000<br>~~pe~~<br>~~nO~~<br>~~OO~~|3200<br>~~pe~~<br>~~nO~~|
|WLPN404018N1R5LB<br>~~es~~<br>~~es~~<br>~~es~~|1.5<br>~~es Ge~~<br>~~es Ge~~<br>~~es~~|B<br>~~Ge ~~<br>~~Ge (es~~<br>~~sn~~|±30%<br> ~~es~~<br>~~(es~~<br>~~sn~~|0.037<br>~~nO~~<br>~~nn~~<br>~~ns~~|75<br>~~nO~~<br>~~OO~~|3300<br>~~nO~~<br>~~OO~~|2400<br>~~nO~~|
|WLPN404018M2R2LB<br>~~es~~<br>~~es~~<br>~~es~~|2.2<br>~~es Ge~~<br>~~es~~<br>~~ee Ge~~|C<br>~~Ge (es~~<br>~~sn~~<br>~~Ge~~|±20%<br>~~(es ~~<br>~~sn~~<br>~~es~~|0.042<br> ~~nn~~<br>~~ns~~<br>~~nD~~|60<br>~~OO~~<br>~~(OO~~|3000<br>~~OO~~<br>~~(OO~~|2200|
|WLPN404018M3R3LB<br>~~es~~<br>~~es~~<br>~~es~~|3.3<br>~~es ~~<br>~~ee Ge~~<br>~~Ge~~|E<br> ~~sn~~<br>~~Ge~~<br>~~Ge~~|±20%<br>~~sn~~<br>~~es~~<br>~~(ns~~|0.055<br>~~ns~~<br>~~nD~~<br>~~ns~~|45<br>~~(OO~~<br>~~(OO~~|2300<br>~~(OO~~<br>~~(OO~~|2000|
|WLPN404018M4R7LB<br>~~es ~~<br>~~es~~<br>~~es~~|4.7<br> ~~ee Ge~~<br>~~Ge~~<br>~~es~~|H<br>~~Ge ~~<br>~~Ge~~<br>~~es ne~~|±20%<br> ~~es~~<br>~~(ns~~<br>~~ne~~|0.07<br>~~nD~~<br>~~ns~~<br>~~nS~~|35<br>~~(OO~~<br>~~(OO~~|2000<br>~~(OO~~<br>~~(OO~~|1700|
|WLPN404018M6R8LB<br>~~es ~~<br>~~es~~<br>~~es~~|6.8<br> ~~Ge~~<br>~~es~~<br>~~es Ge~~|I<br>~~Ge ~~<br>~~es ne~~<br>~~Ge~~|±20%<br> ~~(ns ~~<br>~~ne~~<br>~~nD~~|0.098<br> ~~ns~~<br>~~nS~~<br>~~nD~~|30<br>~~(OO~~<br>~~(Oe~~|1600<br>~~(OO~~<br>~~(Oe~~|1450|
|WLPN404018M100LB<br>~~es~~<br>~~es~~<br>~~es Ms~~|10<br>~~es ~~<br>~~es Ge~~<br>~~Ms Ge~~|K<br> ~~es ne~~<br>~~Ge~~<br>~~Ge (ns~~|±20%<br>~~ne~~<br>~~nD~~<br>~~(ns~~|0.15<br>~~nS~~<br>~~nD~~<br>~~eS~~|25<br>~~(Oe~~<br>~~eS OO~~|1300<br>~~(Oe~~<br>~~OO~~|1200|
|WLPN404018M150LB<br>~~es~~<br>~~es Ms~~<br>~~es~~|15<br>~~es Ge~~<br>~~Ms Ge~~<br>~~es~~|M<br>~~Ge~~<br>~~Ge (ns~~<br>~~Ge~~|±20%<br>~~nD~~<br>~~(ns~~<br>~~Ge~~|0.21<br>~~nD~~<br>~~eS~~<br>~~nS~~|18<br>~~(Oe~~<br>~~eS OO~~<br>~~nN~~|1100<br>~~(Oe~~<br>~~OO~~<br>~~(OO~~|850|
|WLPN404018M220LB<br>~~es Ms~~<br>~~es~~<br>~~es~~|22<br>~~Ms Ge~~<br>~~es~~<br>~~es Ge~~|N<br>~~Ge (ns~~<br>~~Ge~~<br>~~Ge (es~~|±20%<br>~~(ns ~~<br>~~Ge~~<br>~~(es~~|0.29<br> ~~eS ~~<br>~~nS~~|15<br> ~~eS OO~~<br>~~nN~~<br>~~(OO~~|900<br>~~OO~~<br>~~(OO~~<br>~~(OO~~|720|
|WLPN404018M330LB<br>~~es~~<br>~~es~~<br>~~es~~<br>~~es~~|33<br>~~es~~<br>~~es Ge~~<br>~~es~~<br>|P<br>~~Ge~~<br>~~Ge (es~~<br>~~nS~~<br>|±20%<br>~~Ge~~<br>~~(es~~<br>~~nS~~<br>|0.46<br>~~nS ~~<br>~~nS~~<br>|12<br> ~~nN ~~<br>~~(OO~~<br>~~nS~~<br>~~nN~~<br>|700<br> ~~(OO~~<br>~~(OO~~<br>~~nS~~|550<br>~~nS~~|
|WLPN404018M470LB<br>~~es~~<br>~~es~~<br>~~es~~<br>~~es~~|47<br>~~es Ge~~<br>~~es~~<br>~~ee~~<br>|S<br>~~Ge (es~~<br>~~nS~~<br>~~Ge~~<br>|±20%<br>~~(es~~<br>~~nS~~<br>~~(es~~<br>|0.65<br>~~nS~~<br>~~rs~~<br>|10<br>~~(OO~~<br>~~nS~~<br>~~nN~~<br>~~eS~~<br>|600<br>~~(OO~~<br>~~nS~~<br>|440<br>~~nS~~|
|WLPN404018M680LB<br>~~es ~~<br>~~es~~<br>~~es~~<br>~~es~~|68<br> ~~es~~<br>~~ee~~<br>~~es~~<br>|T<br>~~nS~~<br>~~Ge~~<br>~~Ge~~<br>|±20%<br>~~nS~~<br>~~(es~~<br>~~(es~~<br>|1<br>~~nS~~<br>~~rs~~<br>~~ee~~|8.3<br>~~nS~~<br>~~nN~~<br>~~eS~~<br>~~eS~~|520<br>~~nS~~<br>~~(OO~~|320<br>~~nS~~|
|WLPN404018M101LB<br>~~es ~~<br>~~es~~<br>~~es~~<br>~~es~~|100<br> ~~ee~~<br>~~es~~<br>~~es~~|V<br>~~Ge~~<br>~~Ge~~<br>~~Ss~~|±20%<br>~~(es~~<br>~~(es~~<br>~~ne~~|1.45<br>~~rs~~<br>~~ee~~<br>~~ns~~|6.5<br>~~nN~~<br>~~eS~~<br>~~eS~~<br>~~nN~~|420<br>~~(OO~~<br>~~(~~~~**O**O~~|280|
|WLPN404018M151LB<br> <br>~~es ~~<br>~~es~~<br>~~es~~|150<br> ~~ee ~~<br> ~~es~~<br>~~es~~<br>~~es Ge~~|W<br> ~~Ge~~<br>~~Ge~~<br>~~Ss~~<br>~~Ge~~|±20%<br>~~(es ~~<br>~~(es~~<br>~~ne~~<br>~~(ns~~|2.3<br> ~~rs ~~<br>~~ee~~<br>~~ns~~<br>~~nD~~|5.5<br> ~~eS~~<br>~~eS~~<br>~~nN~~<br>~~(O~~|340<br>~~(OO~~<br>~~(~~~~**O**O~~<br>~~(O~~|220|
|WLPN404018M221LB<br> <br>~~es ~~<br>~~es~~|220<br> ~~es~~<br> ~~es~~<br>~~es Ge~~|X<br>~~Ge~~<br>~~Ss~~<br>~~Ge~~|±20%<br>~~(es ~~<br>~~ne~~<br>~~(ns~~|3.8<br> ~~ee ~~<br>~~ns~~<br>~~nD~~|4<br> ~~eS~~<br>~~nN~~<br>~~(O~~|275<br>~~(OO~~<br>~~(~~~~**O**O~~<br>~~(O~~|170|



Test Frequency : 100KHz Test Equipment :  Inductance: Chroma 3302+1320 or equivalent. DCR: Chroma 16502 or equivalent. SRF: HP4291B or equivalent. 

Saturation Current Idc1 : The value of current causes a 30% inductance reduction from initial value. Temperature rise current Idc2 : The value of current causes a 40°C temperature rise. Rated Current : Either Idc1 or Idc2 whichever is smaller. Operating Temperature Range : -25°C to +125°C (Including self-temperature rise) Storage Temp. Range : -40°C to +85°C. MSL : Level 1 

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## **Shielded SMD Power Inductors** 

## **Shape and Dimension** 

|M1|**Dim.**<br>4|**Tolerance**<br>±0.2|
|---|---|---|
|M1<br>M2|4<br>4|±0.2<br>±0.2|
|M3|1.8|Max.|
|M4|1.1|±0.2|
|M5|2.5|±0.2|



## **Recommended Land-Pattern** 

Dimensions : Millimetres 

## **Structural Drawing** 

1. Ferrite core : Ni-Zn ferrite 

2. Winding wire : Polyurethane-copper wire 

3. Over-coating resin : Epoxy resin, containing ferrite powder 

4. Electrode :  External electrode (substrate) Ag 

External electrode (base plating) Ni-Sn External electrode (top surface solder coating) Sn-Ag-Cu 

## **Core Chipping** 

The appearance standard of the chipping size in top side, of bottom side ferrite Core is following dimension. 

|L|W|
|---|---|
|1mm(Max.)|1mm(Max.)|



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## **Shielded SMD Power Inductors** 

Exposed wire tolerance limit of coating resin part on product side Size of exposed wire occurring to coating resin is specified below. 

1. Width direction (dimension a):  Acceptable when a<=w/2 Nonconforming when a>w/2 

2. Length direction (dimension b): Dimension b is not specified. 

3.  When total area of exposed wire occurring to each sides is not greater than 50% of coating resin area, that is acceptable. 

## **Characteristic Curve** 

## **Reflow Profile Chart (Reference)** 

The products may be exposed to reflow soldering process of above profile up to two times. 

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## **Shielded SMD Power Inductors** 

## **Mechanical Performance / Environmental Test Performance Specifications** 

|**Item**|**Test condition**|**Requirements**|**Requirements**|**Requirements**|**Requirements**|**Requirements**|
|---|---|---|---|---|---|---|
|Resistance to<br>Defection|No damage.|The test samples shall be soldered to the test board by the refow soldering<br>conditions show.<br>As illustrated below, apply force in the direction of the Arrow indicating until<br>defection of the test board Reaches to 2mm.<br>Test board size : 100mm×40mm×10mm<br>Test board material l: glass epoxy-resin<br>Solder cream thickness : 0.1|||||
|Adhesion of Terminal<br>Electrode|Shall not come<br>of PC board|The test samples shall be soldered to the test board<br>By the refow soldering conditions shown<br>Applied force: 10 N to X and Y directions Duration: 5 s.<br>Solder cream thickness: 0.1mm<br>(Refer to recommended Land Pattern Dimensions Defned in “Precaution”)|||||
|Body Strength|No Damage|Applied force : 20N<br>Duration : 10s|||||
||||||||
||||||||
||||||||
|Resistance to<br>Vibration|∆L/L: within ±10%<br>No abnormality<br>observed In<br>appearance|The test samples shall be soldered to the test board by The refow soldering<br>conditions shown. Then It shall be submitted to below test conditions|||||
|||Frequencyrange||||10Hz~55Hz|
|||Total Amplitude||||1.5mm(Maynot exceed acceleration 196 m/S2)|
|||SweepingMethod||||10Hz to 55Hz to 10 Hz for 1 min.|
|||Time||||For 2 hours on each X, Y, and Z axis.|
||||||||
|Resistance to<br>Soldering heat<br>(Refow)|∆L/L: within ±10%<br>No abnormality<br>observed<br>In appearance|The test sample shall be exposed to refow oven at 230±5°C for 40 seconds,<br>with peak temperature at 260±5 deg C for 5 seconds, 2 times.<br>Test board thickness: 1mm<br>Test board material :glass epoxy-resin|||||



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## **Shielded SMD Power Inductors** 

|**Item**|**Test condition**|**Requirements**|
|---|---|---|
|Solder ability|At least 90% of<br>surface of<br>terminal electrode<br>is covered by<br>new solder.|The test samples shall be dipped in fux, and then Immersed in molten solder<br>as shown in below table.<br>Flux: Methanol solution containing rosin 25%<br>Solder Temperature<br>245 ±°C<br>Time<br>5 ±1S.<br>ImmersingSpeed<br>25mm/s|
|Temperature<br>Characteristics|∆L/L: within ±20%<br>No abnormality<br>observed<br>in appearance|Measurement of inductance shall be taken at temperature<br>Range within -25°C to +85°C.<br>With reference to inductance value at +20°C, change<br>Rate shall be calculated.|
|Thermal Shock|∆L/L: within ±10%<br>No abnormality<br>observed in<br>appearance|The test samples shall be soldered to test board<br>By the refow soldering conditions shown in Table.<br>The test samples shall be placed at specifed<br>Shown in below table in sequence.<br>The temperature cycle shall be repeated 100 cycles.<br>Conditions of steps for 1 cycle<br>Step<br>Temperature<br>Time(min)<br>1<br>-40 ±3°C<br>30 ±3<br>2<br>Room Temp<br>3 maximum<br>3<br>85 ±2°C<br>30 ±3<br>4<br>Room Temp<br>3 maximum|
|Low Temperature life<br>Test|∆L/L: within ±10%<br>No abnormality<br>observed<br>in appearance|The test samples shall be soldered to the test board by<br>The refow soldering conditions shown in Table<br>After that, the test samples shall be placed at test<br>Conditions as shown in below table.<br>Temperature<br>-40 ±2°C<br>Time<br>500 +24/-0 h|
|Loading at high<br>temperature life test|∆L/L: within ±10%<br>No abnormality<br>observed in<br>appearance|The test samples shall be soldered to the test board by the refow soldering<br>conditions shown in Table.<br>The test samples shall be placed in thermostatic oven set at specifed tempera-<br>ture and applied the rated current continuously as shown in below table.<br>Temperature<br>85 ±2°C<br>Applied current<br>Rated current<br>(Refer to Electrical Characteristics)<br>Time<br>500+24/-0 h|
|Damp heat life test|∆L/L: within±10%<br>No abnormality<br>observed in<br>appearance|The test samples shall be soldered to the test board by the refow soldering<br>conditions shown in Table 1.<br>The test samples shall be placed in thermostatic oven set at specifed tempera-<br>ture and humidity as shown in below table.<br>Temperature<br>60 ±2°C<br>Humidity<br>90~95%RH<br>Time<br>500+24/-0 h|



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## **Shielded SMD Power Inductors** 

|**Item**|**Test condition**|**Requirements**|
|---|---|---|
|Loading under Damp<br>heat life test|<br>∆L/L: within±10%<br>No abnormality<br>observed in<br>appearance.|The test samples shall be soldered to the test board by the refow soldering<br>conditions shown in Table.<br>The test samples shall be placed in thermostatic oven set at specifed tempera-<br>ture and humidity and applied the rated current continuously as shown in below<br>table.<br>Temperature<br>60 ±2°C<br>Humidity<br>90~95%RH<br>Applied current<br>Rated current<br>(Refer to Electrical Characteristics)<br>Time<br>500 +24/-0 h|



## **Part Number Explanation** 

|**WL**|**PN**|**4040**|**18**|**N**|**1R0**|**L**|**B**|
|---|---|---|---|---|---|---|---|
|**Product Code**|**Series**|**Dimensions**|**Thickness**|**Tolerance**|**Value**|**Packing Code**||
|WL: Inductor|Shielded|4mm×4mm|1.8mm|M : ±20%|1R0 = 1µH|L=13″ Reeled|B:STD|
||SMD Power Inductors|||N : ±30%|100 = 10µH|(Embossed Tape)||



## **Tape & Reel Packaging Dimensions** 

**==> picture [278 x 130] intentionally omitted <==**

|**A0**|**B0**|**W**|**F**|**E**|**P1**|**P2**|**P0**|**D0**|**T**|**K**|
|---|---|---|---|---|---|---|---|---|---|---|
|4.3 ±0.1|4.3 ±0.1|12 ±0.3|5.5 ±0.1|1.75 ±0.1|8 ±0.1|2 ±0.1|4 ±0.1|Ø1.5<br>+0.1<br>-0|0.3 ±0.05|2.1 ±0.1|



Dimensions : Millimetres 

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## **Shielded SMD Power Inductors** 

## **Direction of rolling** 

**==> picture [446 x 122] intentionally omitted <==**

## **Reel** 

**==> picture [130 x 105] intentionally omitted <==**

## **Top tape strength** 

**==> picture [302 x 52] intentionally omitted <==**

Peel-off strength: 0.1N~1.3N Peel-off angle:165°~180° Peel-off speed: 300mm/mm 

## **Quantity per reel: 3.5K pcs (3500 pcs)** 

Dimensions : Millimetres 

**Important Notice :** This data sheet and its contents (the “Information”) belong to the members of the AVNET group of companies (the “Group”) or are licensed to it. No licence is granted for the use of it other than for information purposes in connection with the products to which it relates. No licence of any intellectual property rights is granted. The Information is subject to change without notice and replaces all data sheets previously supplied. The Information supplied is believed to be accurate but the Group assumes no responsibility for its accuracy or completeness, any error in or omission from it or for any use made of it. Users of this data sheet should check for themselves the Information and the suitability of the products for their purpose and not make any assumptions based on information included or omitted. Liability for loss or damage resulting from any reliance on the Information or use of it (including liability resulting from negligence or where the Group was aware of the possibility of such loss or damage arising) is excluded. This will not operate to limit or restrict the Group’s liability for death or personal injury resulting from its negligence. Multicomp Pro is the registered trademark of Premier Farnell Limited 2019. 

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## Links

- [View this product on Novapart](https://novapart.co/products/WLPN404018M4R7LB/power-inductor-smd-47-h-17-a-shielded-2-wlpn404018)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/multicomp-pro/wlpn404018m4r7lb/inductor-4-7uh-1-7a-20-shielded/dp/2771305)
---

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