Weidmüller SL-SMT 3.50/10/90LF 1.5SN BK RL PCB Male Header Overview
The Weidmüller SL-SMT 3.50/10/90LF 1.5SN BK RL is a PCB plug-in connector designed as a male header for board-level interconnection. Search demand remains high for terms such as PCB male header, 3.50 mm pitch connector, THT THR male header, and plug-in PCB connector because electronic product design still depends heavily on reliable, assembly-friendly board connectors. This model fits that exact design space.
What is the Weidmüller SL-SMT 3.50/10/90LF 1.5SN BK RL?
The Weidmüller SL-SMT 3.50/10/90LF 1.5SN BK RL product type male header is listed as a PCB plug-in connector with a 3.50 mm pitch, 10 poles, and 90-degree orientation. It uses a THT/THR solder connection, includes a solder flange, features a 1.5 mm solder pin length, and comes with tinned contacts. The body color is black, and the packaging format is tape, which supports production handling in suitable assembly workflows.
Product data also lists ratings of 320 V / 15 A according to IEC and 300 V / 10 A according to UL. Those figures are relevant in board-level selection because voltage and current expectations shape not only electrical safety margins but also overall connector suitability within the device architecture.
Why this connector type is important
The Weidmüller SL-SMT 3.50/10/90LF 1.5SN BK RL PCB male header belongs to the class of pluggable board connectors widely used in industrial electronics, control boards, interface modules, and compact power/signal assemblies. Designers prefer this category when they want repeatable plug-in mating, structured conductor management, and clearer assembly steps compared with fully fixed alternatives.
The 10-pole format offers enough density for many multi-signal or mixed-function applications, while the 3.50 mm pitch balances compactness with practical spacing. In many electronic products, that makes it a comfortable middle ground between ultra-compact fine-pitch solutions and larger power-terminal formats.
THT/THR and reflow-oriented design context
One of the more useful technical details here is the THT/THR solder connection with 1.5 mm solder pin length. Weidmüller’s published data for this product family notes that the 1.5 mm pin version is optimized for reflow soldering methods, while the tape packaging also supports production-oriented component feeding. For manufacturers, this matters because connector choice is not only about electrical fit. It also needs to align with assembly process capability and throughput strategy.
That is why search phrases like reflow compatible male header and tape packaged PCB connector remain commercially and technically relevant. They reflect the practical overlap between connector engineering and manufacturing efficiency.
Typical applications
This header is suitable for industrial control electronics, interface boards, sensor modules, compact automation devices, HVAC electronics, building control hardware, and similar applications where a right-angle pluggable PCB connector is beneficial. It can be especially useful where board access, repeated mating, and organized signal grouping are important.
Why ratings and geometry matter
Voltage and current ratings are critical, but geometry often decides whether a design remains manufacturable and serviceable. A 90-degree male header can support better enclosure integration, side-entry cable routing, and more efficient board stacking logic. In other words, the connector’s physical form has system-level consequences.
FAQ
What is the Weidmüller SL-SMT 3.50/10/90LF 1.5SN BK RL?
It is a 10-pole PCB male header with 3.50 mm pitch, 90-degree orientation, THT/THR solder connection, and 1.5 mm solder pin length.
What are its electrical ratings?
Public product data lists 320 V / 15 A according to IEC and 300 V / 10 A according to UL.
Why is the 1.5 mm pin length important?
Weidmüller’s product information indicates that this pin length is optimized for reflow soldering methods, which can matter in production planning.
What does tape packaging mean here?
It refers to packaging intended to support automated or production-friendly handling, which is helpful in series manufacturing environments.
Where is this type of male header used?
It is commonly used on industrial electronics boards, signal interface devices, control modules, and other PCB-based products requiring pluggable interconnection.
Why choose a 90-degree male header?
Right-angle geometry can improve space usage, support side-entry mating, and help designers fit connectors more efficiently within enclosure constraints.
For more information about Weidmüller PCB connector families, reviewing adjacent series can help compare pitch, pole count, and assembly format.