# Surface Mount Power Inductor, ELT-3KN Series, 50 mH, 1.4 mA, 250 ohm, ± 35%
**URL**: https://novapart.co/products/ELT3KN028C/surface-mount-power-inductor-elt-3kn-series-50-mh
**SKU**: ELT3KN028C
**Manufacturer**: PANASONIC
**Category**: Passive Components || Inductors || Fixed Value Inductors
**Price**: €0.5370
**Stock**: 10+
## Description
Product Range:ELT-3KN Series; Inductance:50mH; DC Current Rating:1.4mA; DC Resistance Max:250ohm; Inductance Tolerance:± 35%; Self Resonant Frequency Min:-; Inductor Case Style:SMD;
## Specifications
| Parameter | Value |
|---|---|
| Svhc | No SVHC (23-Jan-2024) |
| Inductance | 50mH |
| Product Range | ELT-3KN Series |
| Dc Current Rating | 1.4mA |
| Dc Resistance Max | 250ohm |
| Inductor Case Style | SMD |
| Inductance Tolerance | ± 35% |
| Self Resonant Frequency Min | - |
## Datasheet
📄 [Download PDF](https://novapart.co/datasheet/farnell:2145720RL/)
This series is not a recommended product. Not recommended for new design.
## **Voltage Step-up Coils** Panasonic
## Chip type
## **ELT3KN** series
High inductance Voltage Step-up coil chip series for piezoelectric buzzers and DC/DC circuitry of EL panels
## **Features**
- Small and thin
- High inductance
- RoHS compliant
## **Recommended applications**
- Piezoelectric buzzer, Booster circuit for EL backlight (Watch, Electric thermometer, Portable device)
## **Standard packing quantity (Minimum quantity/Packing unit)**
- ●1,000 pcs or 5,000 pcs / reel
**==> picture [496 x 440] intentionally omitted <==**
**----- Start of picture text -----**
Explanation of part numbers
1 2 3 4 5 6 7 8 9 10
E L T 3 K N 0 0 4 C
JU UYU
Product code Outer size Construction Design No. Packaging
Code Packaging
Ｂ ø 180 Reel
Ｃ ø370 Reel
=—
Dimensions in mm (not to scale)
A 3.3±0.1 C 3.3±0.1 E 3.3±0.1
① ①
①
② ② ②
③
③
③
④
(3.1) 1.2±0.1 ④ ④ (3.1)
➄ 5.5±0.2 ➄ 5.5(3.1±)0.2 1.2±0.1 ➄ 4.5±0.2
B ao 3.3±0.1 D 3.3±0.1 H rn 4.5±0.2
① 3.3±0.1
① ①
② ②
⑥
③ ③ ②
④
④ ④
(3.3) 1.1±0.2 (3.3) 1.1±0.2
➄ ➄
5.5±0.2 5.5±0.2 ➄
0.1± 0.10± 0.1± 0.10± 0.1
0.23.3± 0.11.2± 0.6 0.85 0.23.3± 0.11.2± 0.6 0.85 0.23.1± 0.11.2± 0.8±
0.05 0.05
0.11.5± 0.18± 0.22.0± 0.050.18± max. 0.10±
1.4
0.1± 0.10± 0.1± 0.10± 0.1
0.6 0.85 0.6 0.85 ±
0.23.3± 0.11.2± 0.23.3± 0.11.2± 0.2± 0.1± 0.1± 0.8
3.1 2.5 1.2
0.050 0.05
± 0.05 ± 0.05
± ±
0.21.4± 0.125 0.18 0.201.65± 0.25 0.18 0.1± 0.050.10±
1.1
**----- End of picture text -----**
## Part Name: ①Core ②Terminal ③Ring ④Coil ⑤Terminal board ⑥Adhesive
Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use. Should a safety concern arise regarding this product, please be sure to contact us immediately.
18-Apr-22
## **Voltage Step-up Coils (Chip type)**
## **Standard parts**
|Part No.|Inductance|Inductance|DC resistance|DC resistance|DC current
(mA) max.
|Dimensions|Magnetic
composition|
|---|---|---|---|---|---|---|---|
||(mH)|Tolerance(%)|(Ω)|Tolerance(%)||||
|ELT3KN004◻|14.00|±40|125|±10|1.7|A|Permalloy ring|
|ELT3KN007◻|20.00||170||1.4|||
|ELT3KN113◻|1.00|±10|34|±15|25.0||Brass ring|
|ELT3KN126◻|1.50||49||29.0|||
|ELT3KN142◻|0.82||24||30.0|||
|ELT3KN019◻|14.00|±40|125|±10|1.7|B|Permalloyring|
|ELT3KN109◻|3.80|±10|115|±20|15.0||Brass ring|
|ELT3KN114◻|2.50||83|±15|15.0|||
|ELT3KN014◻|30.00|±40|150||1.9|C|Permalloy ring|
|ELT3KN018◻|35.00||235|±10|1.9|||
|ELT3KN028◻|50.00|±35|250|±15|1.4|||
|ELT3KN032◻|25.00|±40|185||10.0|||
|ELT3KN101◻|10.00|±10|285|±10|1.4||Brass ring|
|ELT3KN104◻|1.00||35|±15|30.0|||
|ELT3KN118◻|2.50||64||20.0|||
|ELT3KN121◻|1.00||22.5||40.0|||
|ELT3KN122◻|2.00||44||20.0|||
|ELT3KN123◻|1.00||25||30.0|||
|ELT3KN124◻|4.00||85||15.0|||
|ELT3KN127◻|0.47||14||50.0|||
|ELT3KN128◻|0.56||15||45.0|||
|ELT3KN129◻|0.68||17||34.0|||
|ELT3KN130◻|2.30||51||23.0|||
|ELT3KN131◻|2.00||44||20.0|||
|ELT3KN020◻|30.00|±30|150||2.5|D|Permalloyring|
|ELT3KN111◻|7.50|±10|177||10.0||Brass ring|
|ELT3KN125◻|4.00||85||15.0|||
|ELT3KN041◻|14.00|±40|125|±10|1.7|E|Permalloy ring|
|ELT3KN042◻|20.00||175||1.4|||
|ELT3KN043◻|12.00||117||1.7|||
|ELT3KN139◻|0.68|±10|19|±15|40.0||Brass ring|
|ELT3KN140◻|0.82||22||30.0|||
|ELT3KN135◻|1.10||32||30.0|||
|ELT3KN136◻|2.00||55||20.0|||
|ELT3KN137◻|4.00||117|±10|15.0|||
|ELT3KN149◻|0.33||11|±15|60.0|||
|ELT3KN151◻|0.56||17||50.0|||
|ELT3KN152◻|0.47||14||50.0|||
|ELT3KN155◻|1.10||38||25.0|H|Ringless|
|ELT3KN162◻|4.00||117|±10|15.0|E|Brass ring|
|ELT3KN163◻|1.10||32|±15|30.0|||
- “□” shows the packaging specifications.
## **Applied diagram examples**
**==> picture [455 x 116] intentionally omitted <==**
**----- Start of picture text -----**
〈For buzzer〉 +1.5 V VO 〈For EL DC/DC〉 +3.0 V
V2
V1
SC
SC VO
Vi Vi Vi Vi V1 V2
Load
**----- End of picture text -----**
Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use. Should a safety concern arise regarding this product, please be sure to contact us immediately.
18-Apr-22
**Voltage Step-up Coils (Chip type)**
## **Reflow soldering conditions**
**==> picture [220 x 175] intentionally omitted <==**
**----- Start of picture text -----**
T3
T2
T1
t1 t2
0
Time
C)
°
Temperature (
**----- End of picture text -----**
## ● Pb free solder recommended temperature profile
Voltage Step-up Coils
|Part No.|Preheat|Preheat|Soldering|Soldering|Peak temperature|Peak temperature|Time of reflow|
|---|---|---|---|---|---|---|---|
||T1[℃]|t1 [s]|T2[℃]|t2 [s]|T3|T3 Limit||
|ELT3KN|150 to 170|60 to 120|230℃|30 max.|245℃, 10 s|260℃, 10 s|2 times max.|
Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use. Should a safety concern arise regarding this product, please be sure to contact us immediately.
6-Aug-21
**Voltage Step-up Coils (Chip type)**
## **Packaging methods (Taping)**
## ● Embossed carrier tape dimensions in mm (not to scale)
||t|1|1|Sprocket hole
øD0|Sprocket hole
øD0|Sprocket hole
øD0|Chip pocket|Chip pocket|Chip pocket|Chip pocket|Chip pocket|Chip pocket|Chip pocket|Chip pocket|Chip pocket|Chip pocket|Chip pocket|Chip pocket|Chip pocket|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
||||||||||||||||E|||||
|||||||A
|||||||||F|||||
|||||||||||||||||||||
||t|2||||B||||||||||||||
|||||Chip component|||P1|P2|P3|||||||||||
|||||||||||||||||||||
|||||||||||||Unit : mm||||||||
|Part No.||||A|B|W|E||F|||P1|||P２|P０|øD0|t1|t2|
|ELT3KN|||3.7||6.4|12.0|1.75||5.5|||8.0|||2.0|4.0|1.5|0.3|2.6|
- Reel dimensions in mm (not to scale)
||||E
C
|B
W
T
t|Unit : mm
13
1.1
15.2
Ｃ
370
14
E
W
2.0
18.0
2
60
13
21
2
Ｂ
180
60
13
21
Packaging
A
B
C
D
ｔ
T|
|---|---|---|---|---|---|
||||A
D
|||
|||||||
- Leader Part, Vacant Position
**==> picture [524 x 232] intentionally omitted <==**
**----- Start of picture text -----**
Leader part
200 min. 50 min.
Vacant position
Tape end
50 min.
Vacant position
Standard packing quantity
Kind of taping
Packaging Quantity per reel
B 1,000 pcs. Embossed carrier
Ｂ 1,000 pcs
Embossed carrier taping
Ｃ 5,000 pcs
**----- End of picture text -----**
Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use. Should a safety concern arise regarding this product, please be sure to contact us immediately.
6-Aug-21
## **Guidelines and precautions regarding the technical information and use of our products described in this online catalog.**
- If you want to use our products described in this online catalog for applications requiring special qualities or reliability, or for applications where the failure or malfunction of the products may directly jeopardize human life or potentially cause personal injury (e.g. aircraft and aerospace equipment, traffic and transportation equipment, combustion equipment, medical equipment, accident prevention, anti-crime equipment, and/or safety equipment), it is necessary to verify whether the specifications of our products fit to such applications. Please ensure that you will ask and check with our inquiry desk as to whether the specifications of our products fit to such applications use before you use our products.
- The quality and performance of our products as described in this online catalog only apply to our products when used in isolation. Therefore, please ensure you evaluate and verify our products under the specific circumstances in which our products are assembled in your own products and in which our products will actually be used.
- Please ensure the safety by means of protection circuit, redundant circuit etc. in your system design in order to prevent the occurrence of life crisis and other serious damages due to the failure of our products.
- The products and product specifications described in this online catalog are subject to change for improvement without prior notice. Therefore, please be sure to request and confirm the latest product specifications which explain the specifications of our products in detail, before you finalize the design of your applications, purchase, or use our products.
- The technical information in this online catalog provides examples of our products' typical operations and application circuits. We do not guarantee the non-infringement of third party's intellectual property rights and we do not grant any license, right, or interest in our intellectual property.
- If any of our products, product specifications and/or technical information in this online catalog is to be exported or provided to non-residents, the laws and regulations of the exporting country, especially with regard to security and export control, shall be observed.
## ****
- The switchover date for compliance with the RoHS Directive/REACH Regulations varies depending on the part number or series of our products.
- When you use the inventory of our products for which it is unclear whether those products are compliant with the RoHS Directive/REACH Regulation, please select "Sales Inquiry" in the website inquiry form and contact us.
**Please note that we do not owe any liability and responsibility if our products are used beyond the description of this catalog or without complying with precautions in this catalog.**
25-Nov-22
**Voltage Step-up Coils**
## **Application Guidelines**
## ~~Ld~~ **Safety precautions**
- **・** When using our products, no matter what sort of equipment they might be used for, be sure to make a written agreement on the specifications with us in advance. The design and specifications in this catalog are subject to change without prior notice.
- **・** Do not use the products beyond the specifications described in this catalog.
- **・** This catalog explains the quality and performance of the products as individual components. Before use, check and evaluate their operations when installed in your products.
- **・** Install the following systems for a failsafe design to ensure safety if these products are to be used in equipment where a defect in these products may cause the loss of human life or other significant damage, such as damage to vehicles (automobile, train, vessel), traffic lights, medical equipment, aerospace equipment, electric heating appliances, combustion/gas equipment, rotating equipment, and disaster/crime prevention equipment.
- ✽ Systems equipped with a protection circuit and a protection device.
✽ Systems equipped with a redundant circuit or other system to prevent an unsafe status in the event of a single fault.
## ~~Cn~~ **Precautions for use**
## **1. Operation range and environments**
- ① These products are designed and manufactured for general and standard use in general electronic equipment
- (e.g. AV equipment, home electric appliances, office equipment, information and communication equipment)
- ② These products are not designed for the use in the following special conditions. Before using the products,
- carefully check the effects on their quality and performance, and determine whether or not they can be used.
- ・In liquid, such as water, oil, chemicals, or organic solvent
- ・In direct sunlight, outdoors, or in dust
- ・In salty air or air with a high concentration of corrosive gas, such as Cl2，H2S，NH3，SO2，or NOx
- ・In an environment where these products cause dew condensation
## **2. Handling**
- ① Do not bring magnets or magnetized materials close to the product. The influence of their magnetic field can change the inductance value.
- ② Do not apply strong mechanical shocks by either dropping or collision with other parts. Excessive schock can damage the part.
## **3. Resoldering with a soldering iron**
- ① Resoldering should be done within 3 seconds by soldering iron, the temperature with 350 °C or less and should be cooling down after ward. Both side of terminals shall be fixed closely to PWB. And terminals shall not be pressed in heating.
Don’t Press
- ② The wiring tab shall not be held by sharp-edged tool.
**==> picture [43 x 9] intentionally omitted <==**
**----- Start of picture text -----**
Wiring Tab
**----- End of picture text -----**
- ③ Iron shall not be put to the component itself.
## **4. Mounting side**
- ① External force must be less than 4.9N while mounting.
- ② The wiring tab is expose the terminal, so please be careful when you design PWB pattern of coil circumference.
## **5. Cleaning**
If you clean the inductor, please use own your ultrasonic cleaning to check specified conditions.
## **6. Storage conditions**
Normal temperature (‒5 to 35 ℃), normal humidity (85 %RH max.)，shall not be exposed to direct sunlight and harmful gases and care should be taken so as not to cause dew.
＜Package markings＞
Package markings include the product number, quantity, and country of origin. In principle, the country of origin should be indicated in English.
6-Aug-21
## Links
- [View this product on Novapart](https://novapart.co/products/ELT3KN028C/surface-mount-power-inductor-elt-3kn-series-50-mh)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/panasonic/elt3kn028c/coil-50mh-35-1-4ma-v-step-up/dp/2145720RL)
---
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