Weidmüller BLF 5.08HC/04/90LR SN BK BX Female PCB Connector Guide

The Weidmüller BLF 5.08HC/04/90LR SN BK BX is a 4-pole female PCB connector intended for applications that need a compact but capable pluggable interface on the board. In the world of industrial electronics, four-pole connection formats are extremely practical because they can support grouped signals, compact control functions, or smaller power-related interfaces without taking up the board space of higher pole-count solutions. This connector answers that need with a 5.08 mm pitch and a PUSH IN with actuator connection concept.

Product Identity and Design Logic

This Weidmüller BLF 5.08HC/04/90LR SN BK BX belongs to the OMNIMATE Signal BL/SL 5.08 family and is defined as a female plug for field connection. It uses a 90° conductor outlet direction, which is helpful when wiring needs to be guided in a controlled path relative to the PCB. Because it is pluggable, it supports modularity and can simplify replacement, service, or staged assembly during production.

Technical Specifications

The official datasheet specifies IEC product data of 400 V, 24 A, and 0.2 to 2.5 mm². Under UL, the values are 300 V, 18.5 A, and AWG 26 to AWG 12. The connector has a maximum clamping range of 3.31 mm² and dimensions of 30.14 mm width, 29.6 mm depth, and 20.6 mm height. It supports IP20 when plugged, IP10 when unplugged, coding capability, 25 plugging cycles, and a 10 mm stripping length. These values put it firmly in the category of professional industrial PCB connection components.

Why Engineers Choose a 4-Pole PCB Connector

A four-pole connector can cover many standard interface tasks without creating unnecessary complexity. It is a sensible format for grouped signals, small device power and return paths, modular sensor/actuator connections, and compact electronics assemblies. The Weidmüller BLF 5.08HC/04/90LR SN BK BX offers these benefits while preserving family consistency for teams already working with BLF 5.08HC components in other pole counts.

Operational Benefits of PUSH IN with Actuator

One of the key strengths of the Weidmüller BLF 5.08HC/04/90LR SN BK BX is its PUSH IN with actuator connection method. This allows technicians to terminate conductors quickly while maintaining clear handling and reliable seating. In manufacturing terms, that can contribute to better throughput. In service terms, it helps keep maintenance efficient and more predictable. For many organizations, those process benefits are a meaningful part of total component value.

Material and Compliance Profile

The connector uses PBT insulating material and a tinned copper-alloy contact system. The body is black with orange operational elements, and the flammability classification is UL 94 V-0. The operating temperature is listed from -50 °C to 100 °C, with installation from -30 °C to 100 °C. RoHS compliance without exemption and the absence of SVHC above 0.1 wt% are also declared in the referenced data, supporting its suitability for modern compliance-focused projects.

Typical Application Areas

This Weidmüller female PCB connector is well suited to compact controller boards, industrial electronics, machine interfaces, building automation devices, instrumentation modules, and other systems where four organized terminations are needed in a pluggable format. Search terms such as Weidmüller BLF 5.08HC/04/90LR SN BK BX female PCB connector and 4 pole pluggable terminal block typically map to these selection scenarios.

For more information about Weidmüller, a broader review of compatible headers and connection platforms can support better system-level decisions.

FAQ

What does the Weidmüller BLF 5.08HC/04/90LR SN BK BX do?

It provides a pluggable field wiring interface on a PCB for four conductors, making it useful in compact industrial and electronic applications.

Why would someone choose a 4-pole connector instead of a larger one?

A 4-pole connector can deliver the required functionality with less board space, less bulk, and a simpler wiring layout when only four terminations are needed.

What are its electrical ratings?

According to the datasheet, it is rated 400 V and 24 A under IEC data, and 300 V and 18.5 A under UL data.

Is it suitable for industrial maintenance-friendly designs?

Yes. Its pluggable architecture and PUSH IN connection method make it especially useful where serviceability and fast reconnection matter.

What material is used for the housing?

The housing material is PBT, and the product also features a UL 94 V-0 flammability classification.