jbcapacitors blog

Today we would like to share a piece of capacitance testing lesson with all of our jb customers.

Customer Sent: Thursday, July 09, 2015 6:48 PM
We received the capacitors from you and all cartons are ok, thank you.
First of all I want to thank you for the samples and gifts that you sent, I appreciate your kindness.
I checked all models of motor capacitors to see if they have the right capacity value.
The models between 10u and 80u have the right capacity, many models have 2-3% bigger capacity than rated, this is very good.
For example, 30uF has in fact 31uF.

The problem is with the models 100uF and 120uF.
100uF has in fact around 91uF; 120uF has in fact around 101uF

I would like to know why these models have such a low capacity.
I didn't expect to have such differences, I consider jb Capacitors to be a big factory with good quality.
It is important to know, I hope that next time we can find a solution to make these models with the rated capacity.

jb Capacitors Response: Thursday, July 13, 2015 12:45 PM
Before goods leaving our factory, we did all necessary electrical performance test & inspect, totally 3 times.
we made a JFS-15 100uF capacitor test with HF2618 instrument, a professional instrument for capacitance test.

Customer Sent: Thursday, July 16, 2015 5:48 PM
I am very glad to tell you that we tested the motor capacitors 100u and 120u with an oscilloscope that can also measure capacitance and the result is positive, the capacitors have indeed around 100u and 120u.
There is no problem to measure capacitors less than 100u with this general multimeter 9205, but for bigger capacitors we need indeed to use a professional instrument.
So I am glad that there is no problem with these capacitors from you. We are planning our next order very soon.http://www.jbcapacitors.com/

jb JFD box MKT film capacitors, do you know it? good prices with excellent and stable quality.

Its box technology and small size make it's more easier for your PCB assembly.

Cross reference: Kemet R60, Wima MKS 4, Vishay MKT 1820, MKT 1822, Epcos B 32521~B 32524

Application: General Purpose

Standard lead length: 18mm minimum, can do longer or cut lead.
Package: Bulk & Ammo
Popular voltage: 1J (63V), 2A (100V), 2C (160V), 2E (250V), 2G (400V), 2J (630V), 3A (1000V)

Do you know our Motor Capacitors CBB60~CBB65 can used in widely applications? Let us tell you. 

It can be widely used in Water Pump, Air Compressor, Cleaning Machine, Motors, Washing 
machine, Electric fan, Air conditioner, Fridge and Inverter welder..... 

We can make in CE, UL, RoHS standard and safety and stability as customers require. 
Low D.F., lower temperature rise, Durability and characteristics of frequency, smaller MOQ. 

Please check our products link: http://www.jbcapacitors.com/pdf/JFS-Motor-Capacitor.pdf for more info. 

In the past 5 years, jb Capacitors showed much enthusiastic in overseas electronics components exhibitions, we do not miss every single show.
jb brand name and factory history also been recognized by more and more international companies. All of our jb capacitors are produced under our trademark " jb "

Now we are planning for the next year's exhibition, we will present an new image in front of our jb customers, please meet us at below two exhibitions.
We are eager to build long term cooperation business relationship with your company.

ExpoElectronica 2016
Date: 15-17 March, 2016
Address: Crocus-Expo Moscow Russia

Electronica 2016
Date: 8-11 November, 2016
Address: New Munich Trade Fair Centre, Germany

Samples Tested by Mr. HF Choi
jb JSX - Superior Metallized Polypropylene Film Capacitors - Axial
JSX  1.0uF 250V +/-3% Bulk RoHS,  4pcs 

Datasheet link: http://www.jbcapacitors.com/pdf/JSX-Superior-Metallized-Polypropylene-Film-Capacitors-Axial.pdf

Introduction of Mr. HF Choi
My name is HF Choi I am in the UK and looking for quality JSX cap for DIY hifi.  

Original letter from Mr. HF Choi
I received the capacitors a couple weeks ago and have installed them in my DAC.

I installed the 4 JSX 1uF caps as bypass on the output electrolytic caps of the DAC (2 caps per channel, each 150uF), so the bypass was less than 1%.
Immediately on first listen I could hear that the bass was bloated and the soundstage was closed in but the treble was a bit sweeter.

I let the DAC continue to play for 50 hours after which the bass improved dramatically.  It sounded like an extra octave lower was added.
Also, the treble was becoming more tangible and fine details throughout the frequency range became audible whereas before they were not.  
Nuances now audible in the music making instruments sound more real changed the tonality of entire pieces of music.
It slowed the music down somewhat for some fast bass music but also sped up music with fast transient treble.
Nice, as this probably means there's now less signal smearing and timing issues.

I find there's now a less of a difference between redbook tracks and DSD tracks.  
Both sound smooth and detailed now but DSD more dynamic with good recorded material.
Still very enjoyable with the improvement in tonality, timing, low level detail and nuances, and improved frequency extension - and of course price is very good. I’ve used them for hundreds of hours so far.

I chose the JSX because of the small size. Compared with large and expensive Mundorf and similar grade caps, it is an easy choice. Very high price/performace ratio with the JSX.
I am very satisfied with the performance of the JSX . Thanks for a great product! 

1. JFX &JSX - Premium & Superior metallized polypropylene film capacitors--Axial type(cross capacitors) 
Mainly used in  Audio equipement, cross overs; our MOQ is low, prices unbeatable, very excellent replacements of Mundorf, Jantzen audio , solen,ERSE etc.. 

2. JFA - Mylar Polyester Film capacitor(CL11) --- Mainly used in Energy saving lamps, demand is huge, cost is low.

3. JFB - Metallized Polyester film capacitor(CL21)--dipped type  --- cross to Vishay MKT 368, Epcos B32591~B32594, mainly used in power supplies, electronics ballasts etc..our prices & lead time are very good.

4. JFD - Metallized Polyester Film capacitors(CL23)--Box type  ---Cross to Arcotronics R60, Epcos B32520~32524, European customers prefer it, as it is box type, nicer..

5. JFG - Axial metallized polyeter & polypropylene film capcitor(CL20&CBB20) -- Cross to Arcotronics(Kemet) MKT A50, MKP A70 ,  Vishay MKT1813, MKP1839, 1845, jb capacitors prices are unbeatable.

6. JFP - High voltage Metallized Polypropylene film capacitors (CBB81), -- mainly used in electronics ballast, cross to Epcos B32692, prices and lead time unbetable, quality is very reliable.

7. JFV&JFZ - X2 Metallized polypropylene film capcaitors(ENEC VDE UL Approvals)--jb top sellers, cross to Arcotronics R46, prices & lead time are very good. with ENEC VDE UL approvals, quality is very reliable.

Please contact Ms. Lilian Zhu for more details at  info@jbcapacitors.com

When talking about motor capacitors, the first idea come into your mind is some overseas brand, such as Epcos, AVX and Kemet.  
HongKong brand " jb "  also offers a wide range of products for motor start and run applications in plastic and aluminum cans.  
JFS - 6 is one of the most popular items in our production line.

Application:
The capacitors described in the current catalogue are specifically designed for the start and the run of single-phase electric motors. 
Usually the capacitor is connected in series to an inductive winding into an auxiliary circuit for a single-phase motor or in parallel  phase/phase into three-phase motors when powered by a single-phase circuit.

Safety Class:
The degreee of safety is marked on the capacitor according to the following symbols:
(P2) the capacitor has been designed to fail only in case of circuit cut-off and it is protected against fire and electrocution risk.
(P1) the capacitor can fail either by a circuit cut-off or by a short-circuit and it is protected against fire and electrocution risk.
(P0) in case of failure, the capacitor does not have any particular protection.

For more details please check : 
http://www.jbcapacitors.com/Plastic-Film-Capacitors/JFS-Motor-Capacitor.html

Prezados Senhores,

Ola! Dias atras, eu te enviei e-mails sobre capacitores de filme X2, voce recebeu?
Por favor, queira prestar mais atencao aos nossos abaixo capacitores de filme mais fortes da serie, podera enviar qualquer pergunta sua.

A jb capacitores E hum Fabricante com Certificado ISO, Que produz e vende DESDE 1980 Mais de 22 Tipos de capacitores Filme plastico MKT, MKP ...
ESTAMOS localizados los HK e Taiwan com Tecnologia avancada e vendemos Qualidade com precos atrativos

Linha de produtos principal da jb Capacitors Company
JFA--Capacitores com Filme de Poliéster de Mylar
JFB--Capacitores Metalizados com Filme de Poliéster
JFL--Capacitores Metalizados com Filme de Polipropileno
JFG--Capacitores de Filme com terminais Axiais
JFZ--Capacitores Metalizados classe X2 com Filme de Polipropileno-310VAC
JFP--Capacitores Metalizados de Polipropileno para Alta Tensao
JFQ--Capacitores Metalizados de Polipropileno de Duplo Face
JFS--Capacitores de Filme para Motor de Partida
JFX--Capacitores Metalizados de Polipropileno com qualidade superior

Start Capacitor is used to briefly shift phase on a start winding in a single phase electric motor to create an increase increase in torque.

jb Capacitors Company professionally produce three types CD60 Motor Start Capacitors: JSW-A, JSW-B, JSW-C, which used for the compressor starter of a refrigerator and air-conditioner and for the water pumps.

http://www.jbcapacitors.com/Aluminum-Electrolytic-Capacitors/JSW-Motor-Starting-Capacitor.html

Specification:
a) Rating capacitance: 50~1500uF
b) Rating voltage: 110~330VAC
c) Capacitance tolerance: -10%~+20% 
d) Operating Temperature: (°C) -40°C~+65°C 
e) Structure: aluminum shell, pins, lead cable
f)  Loss Tangent: 0~+20%  

If you could not find your item of above, you can contact us by email at info@jbcapacitors.com , special specification are available on request.
We will serve you the best price, quality and short lead time.

Key words: Motor Start capacitors, CD 60 motor capacitors, CD60 series aluminum electrolytic capacitor for starting A.C. motor 
Motor capacitors for refrigerator and air-conditioner, water pumps