UNE EN IEC 61189-5-501:2021
Test methods for electrical materials, printed boards and other interconnection structures and assemblies - Part 5-501: General test methods for materials and assemblies - Surface insulation resistance (SIR) testing of solder fluxes (Endorsed by Asociación Española de Normalización in April of 2021.)
Métodos de ensayo para materiales eléctricos, tarjetas impresas y otras estructuras de interconexión y montajes. Parte 5-501: Métodos de ensayo generales para materiales y montajes. Ensayo de resistencia de aislamiento de superficie (SIR) de fundentes de soldadura (Ratificada por la Asociación Española de Normalización en abril de 2021.)
| Standard number: | UNE EN IEC 61189-5-501:2021 |
| Pages: | 29 |
| Released: | 2021-04-01 |
| Status: | Standard |
UNE EN IEC 61189-5-501:2021
This part of IEC 61189-5 is used to quantify the deleterious effects of flux residues on surface insulation resistance (SIR) in the presence of moisture. Interdigitated comb patterns comprising long parallel electrodes on an IPC B53 standardized test coupon shall be used for the evaluation. Coupons shall be conditioned and measurements taken at a high temperature and humidity. The electrodes are electrically biased during conditioning to facilitate electrochemical reactions, see Figure 1 and Figure 3. Reference should be made to IEC TR 61189-5-506 that examined different geometry comb patterns: 400¼m x 500¼m; 400¼m x 200¼m; and 318¼m x 318¼m. Specifically, this method is designed to simultaneously assess: " Leakage current caused by ionized water films and electrochemical degradation of test vehicle, (corrosion, dendritic growth). " Provide metrics that can appropriately be used for binary classification (e.g. go/no go; pass/fail) " Compare, rank or characterize materials and processes. This test is carried out at high humidity and heat conditions.