Released 2016

Features of FSB-20

Improve saturation resistance
Space-saving type
Maximum input voltage 528VAC: 10% fluctuations in voltage 480VAC
Selectable leakage current value
Push down type terminal block

Ordering Information and Options

FSB(1)  -  20(2)  -  324(3)  -  (4)  

(1) Model Name
(2) Rated Current
(3) Line to ground capacitor code
  Refer to Product Line-up.
  * When the line to ground capacitor code is different, the attenuation characteristic is
(4) Option
  H:Ultra high-attenuation type
  U:Improve differential mode attenuation (Rated voltage 250V) Only 573, 254,
    335 is applied.

Product Line-up

Product Name Leakage Current* Line to ground capacitor
(nominal value)
FSB-20-203 1.0mA/2.0mA max
0.1mA/0.2mA max
CY1: 0.01μF, CY2: 0.01μF
FSB-20-693 2.5 mA/5.0mA max
0.35mA/0.7mA max
CY1: 0.022μF, CY2: 0.047μF
FSB-20-104 3.5mA/7.0mA max
0.5mA/1.0mA max
CY1: 0.033μF, CY2: 0.068μF
FSB-20-324 12 mA/24 mA max
1.5mA/3.0mA max
CY1: 0.1μF, CY2: 0.22μF
FSB-20-355 180mA/270mA max
25 mA/50 mA max
CY1: 0.22μF, CY2: 3.3μF
  • * Input 250/500VAC 60Hz ( input Δ-connection 250/400VAC 60Hz in case of 355)
    Upper row: Δ-connection, Lower row: Y-connection
    Notice: A leakage current value of Circuit Diagram option: U is described in catalog( pdf) .


Contents Specifications
Rated Voltage Three-phase Three-wire 500V 50/60Hz
Rated Current 20A
Operating Temperature -40 to +85℃ (Refer to Derating Curve)
Agency Approvals UL1283, CSA C22.2 No.8 (C-UL) , DIN EN60939 VDE0565 Teil3-1, ENEC
Others Dimensions (WxHxD) 66x100x240 mm [2.60x3.94x9.45 inches]
Weight 1.8kg max
Warranty Period 5-year
  • * For further information and how to use, please see in Cosel product catalog.

Circuit Diagram

Derating Curve

Documents Download

Technical Data
  • * For another documents aren't listed, please feel free to contact to a Cosel representative.

Similar Model (Rated Voltage and Current)

Features Model Name Released Catalog
Instruction Manuals
General purpose,
Low profile,
High-attenuation type,
1-stage filter
TAC-20 2005 Catalog
Instruction Manuals
Low profile,
Ultra high-attenuation type,
1-stage filter
TAH-20 2006 Catalog
Instruction Manuals
Compact and low profile,
1-stage filter
JAC-20 2014 Catalog
Instruction Manuals
  • * For further information and how to use, please see in Cosel product catalog.
Table1 Product Status Information
No. Product Status Definition
1 New Product New Product. Recommended for new design.
2 Recommended Recommended for new design.
3 blank Product in mass production
4 NRND Not recommended for new design.
5 To be discontinued PDN (Product Discontinuation Notice) is issued and LTB (Last Time Buy) is under consideration.
6 Discontinued LTB order is no longer available.