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Our This vs. That series compares products that are often used for similar purposes. This article will explain the distinction between Tyco Raychem Spec 44 and M27500. Both cables are used in military and aerospace applications and designed for challenging and demanding conditions while still providing consistent and reliable performance. There are only a few key differences that can determine which cable should be used in a certain situation.

What is Raychem Spec 44 cable?

Tyco Raychem Spec 44 was originally designed for military and aerospace applications. Spec 44 wire is used in a variety of different industries, such as aircraft, commercial and military electronics, helicopters, satellites, ships, and trains. It offers dual wall construction, which combines the outstanding physical and electrical characteristics of radiation crosslinked polyalkene with the excellent mechanical and chemical properties of radiation cross-linked polyvinylidene fluoride (PVDF).

Raychem Spec 44 is also highly flame retardant, non-melting, and easy to handle and install using conventional tools. It has a temperature rating of -65°C to +150°C and a voltage rating of 600 volts.

What is M27500 cable?

M27500 is a Mil-Spec cable, meaning that it is made to military specifications. Just like Raychem Spec 44, M27500 is also used in a variety of both military and commercial applications, including airframes, avionics, and ground support equipment. M27500 cable can be manufactured to perform in almost every environment.

These cables are insulated with cross-linked extruded Polyalkene (XL-PVDF) and feature a stranded tinned coated copper conductor. They offer a max temperature rating of 150°C and a voltage rating of 600 volts.

Raychem Spec 44 M27500
Conductor Silver-coated copper Stranded Tinned Coated Copper
Insulation Radiation-crosslinked, extruded polyalkene Cross-linked extruded Polyalkene (XL-PVDF)
Shield N/A Tinned Copper Braid, 85% Coverage
Jacket  Radiation-crosslinked modified PVDF Extruded Cross-linked Polyalkene (XL-PVDF)
Min Temperature Rating -65°C -65°C
Max Temperature Rating 150°C 150°C
Voltage 600 600

How Do They Compare?

There is a lot of overlap when it comes to Raychem and M27500 cables. They are used in similar industries and applications, have the same temperature and voltage ratings, and can withstand challenging environmental conditions. That being said, they do have a few differences in their construction.

The M27500 cable has a tin copper braided shield while the Raychem Spec 44 doesn’t have a shield. The braided shield provides a low-resistance path to the ground and high conductivity. They also have different jacket materials. The Raychem Spec 44’s is a radiation-crosslinked, modified PVDF, and the M27500’s is an extruded cross-linked polyalkene (XL-PVDF).

If you’re unsure if Raychem Spec 44 or M27500 would work best for your wire and cable needs, let Allied help you out! Compare full Raychem and M27500 specs or give your sales rep a call at 800-472-4655 with any questions.