Weidmüller 1003720000 SL-SMT 3.50/22/135F 3.2SN BK BX PCB Header
The Weidmüller 1003720000 SL-SMT 3.50/22/135F 3.2SN BK BX is a 22-pole pluggable PCB male header created for compact, structured, and dependable board connection tasks. In industrial electronics, connectors in this class are often chosen not simply as components, but as part of a broader connection strategy. They allow designers to separate wiring from the board during assembly, simplify field replacement, and keep multi-line interconnection organized in a way that supports both manufacturing and service.
Where this 22-pole header fits
This Weidmüller connector belongs to the SL-SMT 3.50 family, a recognized solution for compact pluggable PCB connectivity. It uses a 3.50 mm pitch, flange-supported design, THT/THR solder mounting, and a 135° outlet direction. The 22-pole count makes this variant especially useful for boards that need a substantial number of contacts without moving to a physically larger pitch system.
That balance is important. In control electronics, building automation boards, communication interfaces, and instrumentation products, engineers often have to maximize connection capacity while preserving board space. A 22-pole header at 3.50 mm pitch can offer a very practical answer.
Technical characteristics of the Weidmüller 1003720000
The Weidmüller 1003720000 SL-SMT 3.50/22/135F 3.2SN BK BX PCB header is defined by a 3.2 mm tinned solder pin, black housing, and box packaging. As part of the same SL-SMT 3.50 platform, it follows the familiar OMNIMATE Signal concept for pluggable board connection. That means engineers can approach it with expectations shaped by an established industrial connector family rather than an isolated special part.
From an application point of view, the THT/THR solder format is highly relevant. Through-hole mounting can support greater mechanical confidence during handling and repeated mating, which is why many industrial designs continue to value it. In connector-heavy assemblies, that can contribute to more robust day-to-day use over the equipment lifecycle.
Why the 22-pole count matters
A 22-pole header can solve several layout problems at once. It allows more channels, grouped references, status lines, commons, or segmented functions to be placed into one consistent interconnect zone. That often improves schematic readability, board labeling, and field wiring logic. Instead of splitting functions across several smaller connectors, the designer can create one centralized connection point that is easier to interpret and service.
The specific keyword combination Weidmüller 1003720000 SL-SMT 3.50/22/135F 3.2SN BK BX PCB header also reflects how engineers actually search for connectors: by brand, product code, pitch, pole count, and connector type. Each of those details matters because even small differences can affect mechanical compatibility, wiring plans, and final enclosure behavior.
Routing and enclosure advantages
The 135° outlet geometry is more than a catalog detail. In a finished device, connector angle directly affects cable flow and internal order. This outlet direction can help reduce wire crowding, keep harnesses aligned with the enclosure path, and lower the risk of awkward bending near the connector body. Combined with the flange structure, it contributes to a more intentional installation result.
For products that may require assembly by technicians or future maintenance access, these practical layout advantages can be just as valuable as the electrical specification itself.
Typical applications
This connector is a sound match for compact PLC-related electronics, monitoring units, HVAC boards, access control systems, embedded industrial devices, and board-based signal distribution functions. It is particularly relevant where multiple circuits must be grouped cleanly and connected through a pluggable architecture.
Weidmüller 1003720000 For more information about Weidmüller, it can be useful to compare adjacent pole-count variants in the same SL-SMT family when designing a scalable product range.
Weidmüller 1003720000 FAQ
What kind of connector is the Weidmüller 1003720000?
It is a male PCB header for pluggable board connection systems. It uses a 3.50 mm pitch and is configured with 22 poles and a 135° outlet direction.
Why choose a 22-pole PCB header?
A 22-pole format is useful when one board connection area must carry many related signals or control lines. It helps keep the interconnection concept centralized and easier to manage.
Is this connector suitable for industrial control boards?
Yes. Its geometry, connection method, and family positioning make it highly relevant to industrial control, interface, and compact automation electronics.
What does THT/THR mean here?
It indicates a through-hole based solder connection concept, often preferred for reliable board retention and compatibility with industrial PCB assembly strategies.
What is the benefit of using a Weidmüller SL-SMT 3.50 series product?
The series offers a structured, recognizable approach to pluggable PCB connection. That makes design scaling, documentation, and future product family development easier for many engineering teams.