Released 2021

Features of NAP-40

・Single phase 277VAC / 300VDC
   This product is available 277VAC equipment in factory switchboards and building equipment
・Withstand voltage 4,000 VAC (Line to ground capacitor code -000 to -472)

Ordering Information and Options

NAP(1)  -  40(2)  -  472(3)  -  (4)  

(1) Series 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
  F:High input voltage (Rated voltage 500VAC/600VDC) Only 103, 223, 683 is applied.

Product Line-up

Product Name Leakage Current* Line to ground capacitor
(nominal value)
NAP-40-000 5μA / 10μA max Not Provided
NAP-40-471 50μA / 100μA max 470pF
NAP-40-222 0.25mA / 0.5mA max 2,200pF
NAP-40-472 0.5mA / 1.0mA max 4,700pF
NAP-40-223 1.25mA / 2.5mA max 0.022µF
NAP-40-683 1.75mA / 3.5mA max 0.068µF
  • * Input 125/250VAC 60Hz
    Notice: A leakage current value of Circuit Diagram option: F is described in catalog( pdf) .


Contents Specifications
Rated Voltage 1φ 277VAC / 300VDC
Rated Current 40A
Operating Temperature -40 to +85℃ (Refer to Derating Curve)
Agency Approvals UL60939[Overvoltage Category:Ⅲ Altitude:3000m]
CSA C22.2 No.8(C-UL)
EN60939(DEMKO)[Overvoltage Category:Ⅲ Altitude:3000m]
Others Dimensions (WxHxD) 65x54x153 mm [2.56x2.13x6.02 inches]
Weight 750g 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.
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.