Selcom Door Contact Oblong vs Square: How to Choose the Right One

When ordering replacement parts for a Selcom elevator door system, buyers often ask the same question: what is the difference between Selcom Door Contact Oblong and Selcom Door Contact Square?

Both are used in the elevator door safety circuit, but they are not always chosen in the same way. In most cases, the right selection depends on the original part, the housing shape, and how the contact fits the existing door lock or door system.

What Does a Selcom Door Contact Do?

A Selcom door contact helps confirm the correct door status in the safety circuit. It works with the landing door lock and related components to make sure the system receives the proper signal for safe operation.

Because of this, the correct match matters. Even a similar-looking part may not fit or work properly if the type is wrong.

Oblong vs Square: What Is the Main Difference?

The most obvious difference is the shape.

• Selcom Door Contact Oblong has a long, narrow housing
• Selcom Door Contact Square has a more compact square-style housing

This affects more than appearance. It can also affect how the part is mounted, how it aligns with the matching component, and whether it fits the original installation point.

Are They Interchangeable?

Not always.

This is where many replacement mistakes happen. Buyers sometimes assume that two Selcom door contacts with a similar function can be used interchangeably. In practice, that is not a safe assumption.

Before ordering, it is better to confirm:

• the original part shape
• the model marking
• the mounting position
• the size
• the matching door lock structure

If these details do not match, the replacement may not fit correctly or may not work as expected.

How to Choose the Right One

The safest method is to check the original part first.

If possible, confirm:

• product code
• dimensions
• old part photos
• installation position
• door system information

If the original contact is oblong, choose the oblong version. If the original is square, choose the square version. Do not rely only on memory or general appearance.

What Should You Send to the Supplier?

If you are not completely sure which version you need, send the supplier:

• a clear photo of the old part
• a close-up of any markings
• overall dimensions
• an installation photo
• quantity required

This helps avoid ordering errors and makes it easier to identify the correct replacement quickly.

Final Thoughts

Selcom Door Contact Oblong and Selcom Door Contact Square may serve a similar purpose, but they should not be selected by name alone. The correct choice depends on the original part, the housing type, and the installation match.

For buyers, the best approach is simple: check first, then order. That saves time, reduces replacement mistakes, and helps keep the selcom elevator door system operating reliably.