ROHs Compliance

Management Regulations for the Environment-Related Substances

YS TECH is committed to the global green initiative. All of our products are ROHS compliant and we continue to stay up to date with other programs such as the REACH initiative. For More Detail RoHS PDF

Cadmium and Cadmium compounds
<100 0
Lead and Lead Compounds
<1000 <100
Total concentration of four heavy metals for product package
Concentration of Cadmium for Plastics (including Rubber) has less than 5 ppm.)
<1000 <100
Concentration of lead for PVC cable, connectors, paints, links, resins
<1000 <100
Concentration of lead for solder
<1000 <1000
Concentration of lead for Steel Alloys
<3500 <3500
Concentration of Lead for Aluminum Alloy.
<4000 <4000
Concentration of Lead for Copper Alloys
<4% <4%
Concentration of Lead for electrical components with ceramic base (example: Resister, capacitor.)
<100 100
Mercury and Mercury compounds
<1000 l00
Hexavalent Chromium Compounds
<1000 0
PBB, PBDE Note 2
<1000 0


A. For RoHS, Decabromobiphenyl ether (DecaBDE) in polymeric applications is exempted by Commission Decision of 13 Oct. 2005 amending Directive 2002/951EC notified under document 2005/717/EC.
B. PBBEs=PBDEs=Polybrominated Diphenyl Ethers= PBDOs=PBBO’s.

Standards for Preconditioning and Measurement

I. Pre-conditioning

Typical pre-conditioning methods are as follows:

  • Incineration under the existence of sulfuric acid.
  • A pressurized acid decomposition method done in a sealed container. (A microwave decomposition method such as EN 13346:2000 and
    EPA 3052:1996)
  • An acid decomposition method under the existence of sulfuric acid or hydrogen-peroxide water. (e.g. EPA3O5OB Rev.2: 1 996).
  • A wet decomposition method under the existence of sulfuric acid, nitric acid, or hydrogen-peroxide water.(e.g. BS EN 1122:2001)
  • lf precipitates (insoluble matter) are produced, dissolve them totally by taking some means. (e.g. alkali dissolution)
  • US EPA354OC or 3550 for organic or organic compounds substances.

II. Measurement methods

Typical measurement methods are as follows:

  • inductively Coupled-Plasma-Atomic (Optical) Emission Spectroscopy (ICP-AES, ICP-OES)(e.g. EN ISO 11885:1 998)
  • Atomic Absorption Spectroscopy (AAS)(e.g. EN lSO5961: 1995).
  • inductively Coupled-Plasma Mass Spectroscopy (ICP-MS)
  • Gas Chromatography Mass Spectroscopy (GC-M S)for organic or organic compounds substances.
  • lf a combination of a pre-conditioning method and a measurement method can guarantee that the lower determination limit of cadmium is less than 5 ppm, the combination is also applicable.
  • Any one of the measurement methods above (except AAS) enables you to analyze cadmium and lead simultaneously.

III. Environmental Logo

Fan & Blower Application Notices Test Conditions and definitions

Most specifications of cooling fan are measured after 5 minutes rotating in an ambient of 25’C/65% RH The operating voltage and temperature were defined after fan rotating continually at rated voltage. Starting Voltage was defined on power on/off condition and Rotational Speed was defined on full speed by its rated value. Except for the feature of the Lock Rotor Protection specifically stated, Y.S. Tech highly suggests not to stop the impellers of the working fans such interruption will cause adverse effect. Noise Level is different from abnormal noise. We estimate noise level by equation when noise level is lower than background noise (17dB). L1O of Life test is a deductive value under statistical method and it is different from product warranty.


Please be cautious when fan is being exercised or handled. Applying pressure to the Impeller, handling the an by lead wire, or dropping the fans to the production platform is resulting in damage.

Fan is to be stored in a dry/cool place. High levels of humidity are harmful to products. If fan was stocked at an ambient temperature under 5°C and over 24 hrs. Please stock fans to an ambient temperature over 20 ‘C and remained over 24 hrs before using. All specifications include abnormal noise have to be measured after 30 minute running.

The correct polarity, Positive (+) and Negative (-), has to be clearly Identified before connecting the fan to the power. Be aware of the connection with reverse polarity may lead to damage since no effective protection can be introduced against such errors.

With exception of suitability of some particular designs, any failure and problems regarding safety of the product caused by the introduction of powder, droplets of water or encroachment of insert in the hub are not guaranteed. It is also not well suited for corrosive environments that include liquids, gases or matters.

After Service

A written request should be submitted to Y.S. Tech prior to approval if abnormality and deviation from specification is required. Meanwhile, send abnormal samples to Y.S. TECH for more detail analysis is necessary.

Other Reminder

Please be cautious. Y.S. Tech is not responsible for any excess resonance, vibration and subsequent noise caused by incorrect mounting of fans. Take necessary precaution handling fans when in operation.
Finger guards are recommended to prevent personal injury. To avoid any unstable power, an “over 4.7 F” capacitor has definitely be connected to fan externally whatever multiple fans are applied in parallel.