Question 1

Can anybody explain how these are marked?, how do you read the values?

Accepted Answer

Here how capacitor values are marked. The basis is  pF. So when you see a three digit number 223: 
1)  first two digits are the value
2) third digit is the number of zeros that are added.
223 = 22000 PF = 22 nF =0.022 uF
102 = 1000 pF = 1nF = 0.001 uF
474 = 470000 pF = 470 nf = 0.47 uF
Hope this helps?

Question 2

Where are these capacitors made

Accepted Answer

I do believe that these capacitors are made in Penang.  Most all Polystrene capacitors are made in either Malaysia, or the Orient.  This is because there are fewer semiconductor manufacturers, for discrete components like these, in American anymore.  I have also noticed a rapid decline in the number of Electronic Part Stores that existed in the past.  Hence the need to shop for components online.  I happen to love my hobby.  And I may be building projects, at my desk, for years to come.  And I am getting pretty old now.  
     If you look on the parts, there are markings.  These markings can be looked up online.  These represent the manufacturer and the production location.

Happy project building!!!

Question 3

Do you have 225k 250v ac  metallized film capacitors?

Accepted Answer

Yes.  Glad to assist where I can.

Question 4

What is the manufacturer brand of this capacitors?

Accepted Answer

Dear Eduardo,
     Capacitors are typically manufactured, overseas, by Nichicon, Vishay ( Used to be Dale Inc), Sangamd, or other brands.  Each unit, no matter how small, has a logo, of some sort, located close to the value stamp.  It is beneficial for a good hobbyist to make themselves familiar with several manufacturer's logo marks.  Bojack is a broker who packages kitted parts.  A good plan for saving money.  Many former local American parts distributors no longer exist - leaving the customer having to seek by-mail parts sources.  Mr. Sever.  Engineer

ASIN	B0831GP3QP
Best Sellers Rank	#59,743 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #495 in Industrial Electrical Capacitors
Brand Name	BOJACK
Capacitance	0.56 Microfarad
Capacitance Tolerance	5
Customer Reviews	4.7 4.7 out of 5 stars (586)
Item Dimensions W x H	7.68"W x 1.46"H
Item Shape	Rectangular
Manufacturer	BOJACK
Material Type	Polypropylene
Maximum Voltage	630 Volts
Model	BJ-CBB22-150
Mounting Type	Through-Hole Mount
Operating Voltage	630 Volts
Part Number	BJ-CBB22-150
UPC	786118004276 717351790152

BOJACK 15 Values 150 Pcs Metallized Polypropylene Film DC Capacitor 400V/0.01uF ~ 0.56uF 630V/ 0.001uF ~ 0.068uF Assortment Kit

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