Released 2011

Features of FTB-150

Space-saving type
Maximum input voltage 528VAC: 10% fluctuations in voltage 480VAC
Selectable leakage current value
Ultra high-attenuation type "FTB-150-355-L" for EU (Y type with neutral earth system)

Ordering Information and Options

FTB(1)  -  150(2)  -  663(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
    355 is not applied.
  S:Hexagon socket head cap screw (Standard type is Hexagon head screw)
  L:Ultra high-attenuation type for EU

Product Line-up

Product Name Leakage Current* Line to ground capacitor
(nominal value)
FTB-150-203 1.0mA/2.0mA max
0.1mA/0.2mA max
CY1:0.01μF, CY2:0.01μF
FTB-150-663 2.5 mA/5.0mA max
0.35mA/0.7mA max
CY1:0.033μF, CY2:0.033μF
FTB-150-324 12mA/24 mA max
1.5mA/3.0mA max
CY1:0.22μF, CY2:0.1μF
FTB-150-355-L 330mA/515mA max
40 mA/80 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


Contents Specifications
Rated Voltage Three-phase Three-wire 500V 50/60Hz
Rated Current 150A
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) 100x210x400 mm [3.94x8.27x15.75 inches]
Weight 7.8kg 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.

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  • * 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.