Weidmüller 1003530000 SL-SMT 3.50/04/135F 3.2SN BK BX Guide
The Weidmüller 1003530000 SL-SMT 3.50/04/135F 3.2SN BK BX is a 4-pole PCB male header designed for structured pluggable board connections in compact electronic systems. As a Weidmüller 1003530000 PCB plug-in connector male header, it offers a practical mix of compact pitch, controlled mating geometry, and a mechanically stable soldering concept suited to professional device design.
What defines this connector
This part is specified as a flanged male header with THT/THR solder connection, a 3.50 mm pitch, 4 poles, and a 135-degree orientation. It also includes a 3.2 mm solder pin length, tinned surfaces, black housing, and box packaging. These details make it a disciplined choice for PCB assemblies where connection quality, compact layout, and repeatable field interfacing must all be considered together.
A 4-pole format is often especially useful where designers need a small but slightly expanded connection grouping. It can suit compact control channels, simple actuator interfaces, sensor plus power combinations, or low-voltage signal groupings on industrial and automation PCBs.
Electrical and mechanical value
Official product data lists IEC 320 V / 15 A and UL 300 V / 10 A for the Weidmüller SL-SMT 3.50/04/135F 3.2SN BK BX male header. Those values show that this is not merely a miniature signal connector with limited relevance. It is a compact but serious board interface component intended for professional equipment.
The THT/THR solder connection style is also important from a manufacturing and durability standpoint. In environments where connectors may experience handling, vibration, or repeated service events, strong board anchoring can make a real difference over the product lifecycle.
Where the 4-pole version fits well
The Weidmüller 1003530000 SL-SMT 3.50/04/135F 3.2SN BK BX product type is relevant in control boards, smart building modules, measurement electronics, industrial communication devices, and other compact assemblies that need a pluggable board connector with a balanced number of poles. Four poles often provide enough flexibility for practical circuit grouping without pushing the footprint beyond what a compact PCB can comfortably support.
Designers also benefit from the 135-degree format when routing space is limited. It can help establish cleaner cable or plug approach angles and reduce conflict with nearby components or enclosure walls.
Why connector angle and pole count matter together
Choosing a connector is never only about voltage and current ratings. Pole count influences interface organisation, while angle affects access and routing. In tightly integrated products, these two factors often determine whether the final assembly feels engineered or compromised. The Weidmüller 1003530000 4-pole male header gives engineers a useful middle-ground option within the 3.50 mm family.
Weidmüller 1003530000 For more information about Weidmüller, it is worth comparing adjacent pole-count variants when developing scalable product platforms based on a shared board connection strategy.
Weidmüller 1003530000 FAQ
What is Weidmüller 1003530000 used for?
It is used as a 4-pole pluggable PCB male header in compact industrial and electronic equipment where a structured board interface is needed.
Why choose a 4-pole header instead of 2 or 3 poles?
A 4-pole format supports broader circuit grouping while staying compact. It can be a practical choice when an application needs slightly more flexibility without moving to a larger connector footprint.
What does the 135-degree design change?
It affects how the mating connector approaches the PCB, which can improve cable routing, service access, and enclosure fit in space-constrained products.
Is the connector mechanically robust?
Its THT/THR soldering concept supports strong board integration, which is helpful in professional equipment exposed to handling or operational stress.
What should be checked before using it?
Engineers should check the matching counterpart, the PCB footprint, clearance and creepage needs in the final application, and the routing effect of the connector angle.
Is it suitable for modular product design?
Yes. Connector families with multiple pole counts are often useful in modular product platforms because they allow consistent connection design across several product variants.