Weidmüller 1003710000 SL-SMT 3.50/21/135F 3.2SN BK BX PCB Header
The Weidmüller 1003710000 SL-SMT 3.50/21/135F 3.2SN BK BX is a 21-pole male PCB header built for compact pluggable connectivity in industrial and electronic assemblies. It belongs to a connector class that engineers often choose when they want an orderly, service-friendly interface between board electronics and field or internal wiring. In many cases, this kind of part is less about visual complexity and more about disciplined system design: consistent pitch, predictable pole arrangement, stable solder mounting, and a connector geometry that respects enclosure space.
Connector identity and design intent
This Weidmüller PCB header uses a 3.50 mm pitch and a 135° outgoing elbow, with flange support and THT/THR board mounting. The result is a connector that fits applications where space is limited but connection density still matters. With 21 poles, the header is especially helpful in projects that need one structured pluggable interface for numerous low-voltage lines, grouped functions, or organized signal transfer.
In practical terms, a 21-pole connector is often used where designers want a single, readable interconnection point rather than multiple smaller headers spread across the board. That improves documentation clarity and can make commissioning and troubleshooting more straightforward.
Technical features that define this variant
The Weidmüller 1003710000 SL-SMT 3.50/21/135F 3.2SN BK BX product uses 3.2 mm tinned solder pins in a black housing and comes in box packaging. Its electrical reference values are listed at IEC 320 V / 15 A and UL 300 V / 10 A. While real device ratings always depend on surrounding design conditions, those figures place the connector clearly within mainstream industrial PCB connector requirements for control and signal-related use.
The THT/THR solder style is another strong point. Through-hole based mounting is frequently preferred when mechanical retention and handling stability are important. In boards that may experience connector insertion cycles, field service, or moderate mechanical stress, that mounting logic can add confidence during both production and product use.
Why the 21-pole format is useful
The difference between 20 poles and 21 poles may seem small, but in product development it can be exactly what avoids redesign. An additional pole can support a spare channel, shield reference, common line, diagnostic path, or dedicated control contact that would otherwise require a second connector or a compromise elsewhere in the layout. That is why product-specific pole counts matter so much in pluggable PCB connector selection.
The Weidmüller 1003710000 SL-SMT 3.50/21/135F 3.2SN BK BX PCB header is therefore a practical match for applications such as industrial I/O boards, sensor interface electronics, communication support boards, compact machine controls, and structured signal hubs. Engineers frequently value this kind of connector not because it is dramatic, but because it quietly solves routing and connection problems in a clean way.
Mechanical layout and routing benefits
The 135° outlet supports a disciplined cable path inside the enclosure. That can reduce cable crowding above tall components, help avoid sharp wire turns, and create a neater internal architecture. The flange form adds to placement stability and can also help preserve connector alignment across the product lifecycle.
Because the connector belongs to the OMNIMATE Signal platform, it also fits into a broader ecosystem of pluggable PCB connection concepts. That matters for product families and manufacturers who prefer to standardize interconnect logic across several boards or device generations.
Where this connector makes sense
This Weidmüller 1003710000 part makes sense in industrial electronics, energy management controls, smart building systems, compact machinery, panel-integrated electronics, and signal concentration boards. It is a strong candidate when the design brief calls for a multi-pole PCB header that stays compact, supports pluggable serviceability, and aligns with recognized industrial connector design principles.
Weidmüller 1003710000 For more information about Weidmüller, it is helpful to compare matching female connectors and related OMNIMATE board connection components within the same system family.
Weidmüller 1003710000 FAQ
What is the pole count of the Weidmüller 1003710000?
This specific version has 21 poles. That makes it suitable for grouped circuits, dense signal layouts, and organized board-to-wire interfaces.
Is the Weidmüller 1003710000 a compact connector?
Yes. The 3.50 mm pitch allows a relatively compact footprint while still maintaining a practical industrial connection format that is easier to handle than many ultra-miniature alternatives.
Why is the 135° outlet important in real applications?
It helps direct the wiring path in a more controlled way, which can improve enclosure organization, installation convenience, and service readability.
Does this connector support industrial use?
Yes. Its specification profile, construction style, and OMNIMATE family positioning make it clearly relevant to industrial electronics and structured PCB connection applications.
Who typically selects a part like this?
It is typically selected by PCB designers, product engineers, automation developers, and control-system manufacturers who need a pluggable male header with stable board mounting and a specific pole count.