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m22759/16-19 vs m22759/32-35


Our stock of M22759 wire may be used in commercial or military aircraft where wire applications must adhere to certain restrictions and specifications. The M22759 wire is built in strict accordance with military specifications. All MIL-Spec designs exhibit consideration of the need for protection from environmental factors and the M22759 is designed for the harshest environments and extreme conditions which enables them to be used in military and aerospace applications. But what is also important about these wires is the type of insulation is used in their design. 


ETFE and XL-ETFE are both common insulation materials used in wires for the aerospace industry. Aerospace wires are used in tough applications where severe temperatures are encountered. Both ETFE and XL-ETFE are thermal aging, solder, and moisture resistant. These materials are used as insulation in slants within M22759 military wire. M22759 has since been replaced with the classification SAE AS22759, however, it is still commonly referred to by its mil-spec call out. The slants that will be compared in this post are /16-/19 which use ETFE and /32-/35 which use XL-ETFE. These aerospace wires, for the most part, are very similar. Let’s take a closer look.


The M22759/16-19 have ETFE as insulation but are constructed in slightly different ways from each other. See Below

Slant Conductor Insulation Voltage Temp. Rating
M22759/16 Stranded Tinned Copper ETFE 600V 150°C
M22759/17 Silver Plated Copper Alloy ETFE 600 V 150°C
M22759/18 Stranded Tinned Copper ETFE 600V 150°C
M22759/19 Silver Plated Copper ETFE 600V 150°C


The M22759/32-35 have XL-ETFE as insulation but like their counterparts above, there are slight differences in the construction of the wire. 

Slant Conductor Insulation Voltage Temp. Rating
M22759/32 Tinned Copper XL-ETFE 600V 150°C
M22759/33 Silver Coated High Strength Copper Alloy XL-ETFE 600V 200°C
M22759/34 Tinned Copper XL-ETFE 600V 150°C
M22759/35 Silver Coated High Strength Copper Alloy XL-ETFE 600V 200°C

M22759/16-19 Vs. M22759/32-35

As you can see, there is some overlap between the M22749/16-19 and the M22759/32-35 wires. Both are aerospace wires with a voltage rating of 600V, use similar conductor material, and meet military specifications. However, the biggest difference appears in their insulation. 

Even though ETFE and XL-ETFE are similar, they do have some very noticeable differences. The main difference being that one is cross-linked and the other is not. The cross-linking in slants /32-/35 when using silver coated/plated copper alloy as the conductor, give them an overall higher temperature rating than slants /16-/19. Slants /16-/19 with silver-coated/plated copper alloy are rated to 150°C, while in slants /32-/35, those that use silver coated/plated copper alloy are rated to 200°C. Cross-linking also provides greater stability at these higher temperatures than its regular counterpart.

If you’re unsure about what cable you’ll need in order to meet the needs of your application, consult with one of Allied’s knowledgeable sales reps by submitting an RFQ. Visit our website to learn more about ETFE Wire vs XL-ETFE Wire.