40×25mm Aluminum PCB Enclosure for Electronic Circuit Board

40×25mm Aluminum PCB Enclosure for Electronic Circuit Board is suitable for electronics that need to control external volume, mount circuit boards, and integrate multiple interfaces. Boyuan Hardware, a China-based manufacturer and supplier with over 20 years of experience and a ~10,000㎡ factory, provides cutting, CNC machining, drilling, tapping, surface treatment, laser engraving, silkscreen, inspection, and assembly.

Product Definition

The 40×25mm aluminum enclosure is an extruded aluminum housing for small-to-medium electronic modules, PCB circuit boards, and embedded electronic devices.

The 40×25mm cross-section is a relatively compact flat-profile specification. Compared to smaller electronic enclosures, it can provide more internal layout space for PCBs, circuit components, and interface assemblies, while not significantly increasing overall device size. It is therefore suitable for electronic products that need to control external volume, mount circuit boards, and integrate multiple interfaces.

This type of extruded aluminum enclosure usually uses the profile as the main body, formed by fixed-length cutting to the required length, followed by CNC machining, drilling, tapping, interface openings, and end plate installation according to product structure.

For electronic products requiring long-term mass production, the standardized extruded aluminum structure of 40×25mm also helps reduce the complexity of enclosure structure design and machining.

Core Advantages

1. Flat Cross-Section, Suitable for Compact Electronic Devices

40×25mm is not simply pursuing "smallness," but achieving a balance between device dimensions and internal mounting space.

The 25mm cross-section height keeps the overall enclosure profile low, while the 40mm width provides a certain lateral layout space for PCBs and internal electronic components.

Therefore, it is more suitable for:

• Small PCB control modules
• Data acquisition modules
• Signal conversion modules
• Communication modules
• IoT electronic modules
• Industrial electronic control modules

It is especially suitable for products that need to centrally install circuit boards, interfaces, and a small number of electronic components in one compact enclosure.

2. More Suitable for Combined PCB and Interface Design

For many electronic devices, the enclosure not only needs to accommodate the PCB, but also needs to arrange USB, DC, power, communication, signal, and other interfaces on the side or end.

40×25mm can provide more structural space than ultra-small specifications while maintaining a relatively compact product size.

According to actual design, the enclosure can be machined for:

• Interface openings
• Power holes
• Communication interface holes
• Indicator light holes
• Button holes
• Mounting holes
• Threaded holes
• PCB fixing structure machining

Thus forming a complete electronic device enclosure.

3. Length Can Be Adjusted According to Internal Electronic Modules

40×25mm mainly defines the profile cross-section, not the final product length.

Therefore, fixed-length cutting can be performed according to the length of the PCB, circuit module, and internal components.

For products of different lengths, the same cross-section specification can be used, and different-sized enclosures can be formed by adjusting the aluminum profile length, which is beneficial for electronic product series design.

4. Aluminum Extrusion Structure Facilitates Subsequent Precision Machining

The 40×25mm aluminum extrusion enclosure is not limited to use as a simple "aluminum box."

According to product drawings, further processing can be performed: Cutting → CNC machining → Drilling → Tapping → Surface treatment → Laser engraving/silkscreen → Inspection → Assembly.

Therefore, it can be gradually machined from a basic profile into an electronic enclosure that meets specific device structural requirements.

Technical Specifications

Product Applications

The 40×25mm Aluminum PCB Enclosure for Electronic Circuit Board size is more suitable for devices with limited volume but requiring a certain amount of internal electronic components and interface space.

1. Industrial Control Modules

40×25mm can be used for some compact industrial electronic modules, such as:

• PLC expansion modules
• I/O modules
• Industrial control modules
• Signal conversion modules
• Data acquisition modules
• Embedded controllers
• Automation equipment electronic modules

These products usually need to install PCBs and arrange power, signal, or communication interfaces on the enclosure, so they require more structural machining than simple unperforated protective shells.

2. Data Acquisition and Signal Processing Equipment

Suitable for:

• Data acquisition modules
• Signal acquisition modules
• Signal converters
• Data processing modules
• Monitoring modules
• Sensor interface modules

These products are usually not large in size, but need to install PCBs, wiring, or interface components internally. 40×25mm can provide a relatively compact mounting space.

3. Communication and Network Electronic Modules

Can be used for:

• Communication modules
• Data transmission modules
• Signal conversion devices
• Embedded communication devices
• Network communication electronic modules
• Wireless communication control modules

The enclosure length can be adjusted according to the internal circuit board, and post-machining can be performed for interface positions.

4. IoT and Smart Electronic Devices

40×25mm is also suitable for some:

• IoT control modules
• Smart monitoring modules
• Remote data acquisition devices
• Smart sensor modules
• Embedded electronic devices
• Smart control terminals

For products that need to integrate PCBs, interfaces, and electronic components into a smaller volume, this specification has good adaptability.

5. Small Instruments and Test Electronic Modules

Can also be used for:

• Measurement modules
• Detection modules
• Test electronic modules
• Signal monitoring equipment
• Electronic modules inside instruments
• Small control devices

Whether it is ultimately suitable for a particular device mainly depends on PCB dimensions, internal component height, interface layout, and mounting method, not just the enclosure cross-section size.

What Can Be Customized?

Surface Treatment and Appearance Machining

The 40×25mm aluminum enclosure can undergo subsequent surface machining according to the appearance requirements of the final product.

The following can be selected according to actual product requirements:

• Anodizing
• Aluminum surface treatment
• Laser engraving
• Silkscreen printing
• Logo machining
• Other appearance machining required by drawings

If the customer has a specified color, surface effect, or logo position, it can be confirmed during the sampling stage.

Workshop Show

FAQ

What type of PCB is the 40×25mm aluminum enclosure suitable for?

More suitable for small-to-medium PCBs and electronic function modules, especially compact devices that need to simultaneously arrange interfaces, mounting holes, or a small number of electronic components. Specific confirmation is needed based on actual PCB dimensions and component height.

Can the length of the 40×25mm aluminum enclosure be customized?

Yes. 40×25mm represents the profile cross-section size, and the actual enclosure length can be fixed-length machined according to the PCB and device structure.

Can 40×25mm Aluminum PCB Enclosure for Electronic Circuit Board be machined according to my drawings?

Yes. Profile, length, interfaces, mounting holes, threaded holes, and other CNC machining requirements can be confirmed according to 2D or 3D drawings.

Can interfaces be installed on the 40×25mm aluminum enclosure?

Yes. Openings can be machined according to actual product interface positions, including power, USB, communication, and other signal interfaces.

Can mounting holes and threaded holes be machined?

Yes. Drilling, tapping, and related CNC machining can be performed according to the product mounting method.

Is 40×25mm suitable for industrial control equipment?

Suitable for some compact industrial control modules, I/O modules, data acquisition modules, signal conversion modules, etc. Final confirmation is needed based on PCB and internal structure.