Technological Innovation

What is IEC 60335-1 Standard?

1. Safety Standard IEC60335-1

IEC 60335-1:2010 deals with the safety of electrical appliances for household and similar purposes.

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 standardIEC60950-1IEC60335-1 200VIEC60335-1 100V
Over voltage category
1Isolation voltage
Input - Output3,0002.4・U+24002,000
Input - FG1,5001.2・U+9501,000
Output - FG(500)--
200-250V *32.5/5.02.5/5.02.5/5.0
250-300V *33.2/6.44.0/8.04.0/8.0
300-400V *34.0/8.04.0/8.04.0/8.0
150-250V *42.0/4.02.0/3.52.0/3.5
250-300V *42.0/4.02.0/3.52.0/3.5
300-400V *43.2/6.4--
4Leakage currentHand-held0.75mA--
Portable class I appliances-0.75mA0.75mA
Stationary class I motor-operated appliances-3.5mA3.5mA
5Maximum temperature (Wire)Type ALess than 90℃--
Type ELess than 105℃--
Type BLess than 110℃--
6Temperature increasing (Wire)Type A-Less than 65degLess than 65deg
Type E-Less than 80degLess than 80deg
Type B-Less than 85degLess 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. 

(4) Safety approval

The creepage and temperature of wire are different depending on the product. 


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