Pitch 3.50 mm
Pitch 5.00 mm
Pitch 7.50 mm
Conformity with standards and the consistently high level of quality of all electronic parts and components are among the key factors of success in product development, particularly in the industrial environment. Our LSF-SMD product family meets all of the requirements of PCB terminals in the industrial environment, the conditions of which are simulated in our accredited laboratory.
LSF-SMD PCB terminals from Weidmüller were specifically designed for soldering using the SMD reflow process and are able to withstand temperatures of up to 260 °C. The terminals fulfil JEDEC requirements as regards process sensitivity (PSL) and moisture sensitivity levels (MSL) with the highest rating class. Our LSF-SMD PCB terminals also stand up to any comparison in terms of coplanarity, strength and vibration resistance. As such, they can easily be integrated into all of the current production processes.
To ensure reliable soldering quality in the manufacturing process, the contact surfaces of solder pins must be wetted with the solder paste immediately after assembly. This allows the flux contained within the paste to react with the Sn coating, resulting in a reliable soldering quality. The LSF-SMD has a coplanarity of up to 100 μm. We recommend a stencil thickness of 150 to 200 μm.
Stability properties are covered by normative values as well as additional practical testing. The axial torque per contact point (pole) is significantly higher than the values permitted by the standard IEC 60947-7-4. A clamping force per pole of around 150 N (40 N limit value for 1.5 mm² conductor cross-sections) in the axial direction is many times higher than the normative requirements.
A simulated service life test is performed. The test spectrum includes increased broadband noise and shock in accordance with IEC 61373/10.2011 with a category 1B severity level (“body mounted”) in the 5-to-150-Hz frequency range and with an ASD level of 1.857 (m/s²)²/Hz 3 dB and an effective acceleration of 5.72 m/s² and 240 degrees of freedom (DOF). The test duration is five hours per axis. The half-sine shock wave form has a peak acceleration of 50 m/s² and a nominal duration of 30 ms.