What is IEC60335-1?

1. Safety Standard IEC60335-1

IEC 60335-1:2010 deals with the safety of electrical appliances for household and similar purposes.
COSEL product is designed based on the safety standard IEC60950-1.
Table1 shows the comparison of requirement between IEC60335-1 and IEC60950-1 in terms of safety.

Table1 The comparison of requirement between IEC60335-1 and IEC60950-1 in terms of safety
# Safety standard IEC60950-1 IEC60335-1 200V IEC60335-1 100V
Over voltage category
1 Isolation voltage
Input - Output 3,000 2.4・U+2400 2,000
Input - FG 1,500 1.2・U+950 1,000
Output - FG (500) - -
2 Creepage
200-250V *3 2.5/5.0 2.5/5.0 2.5/5.0
250-300V *3 3.2/6.4 4.0/8.0 4.0/8.0
300-400V *3 4.0/8.0 4.0/8.0 4.0/8.0
3 Clearance
150-250V *4 2.0/4.0 2.0/3.5 2.0/3.5
250-300V *4 2.0/4.0 2.0/3.5 2.0/3.5
300-400V *4 3.2/6.4 - -
4 Leakage current Hand-held 0.75mA - -
Movable 3.5mA - -
Stationary 3.5mA - -
Portable class I appliances - 0.75mA 0.75mA
Stationary class I motor-operated appliances - 3.5mA 3.5mA
5 Maximum temperature (Wire) Type A Less than 90℃ - -
Type E Less than 105℃ - -
Type B Less than 110℃ - -
6 Temperature increasing (Wire) Type A - Less than 65deg Less than 65deg
Type E - Less than 80deg Less than 80deg
Type B - Less than 85deg Less than 85deg

*1:(U) Maximum working voltage
*2:(Basic isolation/Reinforced isolation)
*3:Listed voltage means working voltage.
*4:Listed voltage means working voltage in IEC60950-1, and rated input voltage in IEC60335.

2. IEC60335-1 compliance

(1) Creepage

Required creepage in IEC60335-1 is more strict than IEC60950-1 in some part.

(2) Temperature of wire

In IEC60950-1, type of wire is categorized by the absolute maximum temperature. In IEC60335-1, type of wire is categorized by the temperature increasing against temperature at 25ºC ambient temperature.

(3) Grounding capacitor

2pcs of Y1 grade grounding capacitors shall be used in series to comply with IEC60335-1. Generally COSEL product has only 1pc of Y1 grade grounding capacitor.

(4) Safety approval

The creepage and temperature of wire are different depending on the product. Generally COSEL product is approved based on IEC60950-1, and it shall be required the critical components management and other additional items in order to acquire IEC60335-1.
For detail about possibility to get approval, please contact us.

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