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SPEC 44 cableSPEC 44- Powerful with exceptional physical and electrical properties

Spec 44 cables were originally designed for space and military applications, as well as complex, high-density packaging. Today, these cables and cables are found throughout the industry. Everywhere, where due to the adverse environmental conditions highest resistance and reliability is required.

SPEC 44 - proven cable insulation system easy to handle

The Spec 44 line features double-walled isolation that combines the extraordinary physical and electrical properties of molecularly cross-linked polyalkenes with the outstanding mechanical and chemical properties of molecular cross-linked polyvinyl fluoride (PVDF). The result is a line insulation system that has a temperature range up to 150 ° C, a small diameter, light weight, solder iron resistance and resistance to most, solvents, fuels and lubricants.

The Spec 44 cables and cables are highly flame retardant, infusible and cold flow resistant. They are mechanically strong, easy to handle and easy to process with conventional tools. In airframe wiring, Spec 44 designs provide advanced replacement solutions for PVC / Nylon and glass-braided cables. Spec 44 leads are available in a wide range of sizes - both stranded and solid, with standard designs of tinned and silvered copper or high strength copper alloy.

SPEC 44 data sheet
  • -65 ° C to + 150 ° C
  • Double-walled construction
  • Rated voltages 600 V, 1000 V, 2500 V
  • Small diameter, low weight
  • Low smoke and low corrosive gas evolution
  • Resistant to most solvents and chemicals
  • Resistant to electric arcing

Spec 44 Lines and Cables - nominal size, ladder design and weights

Lines / twisted pairs

44A011X
(600 V)
switch cable
44A021X
(1000V)
switch cable
44A031X
(2500 V)
switch cable
44A081X
(600V)
aviation line
44A012X
(600 V)
twisted pair
Conductor size (AWG)Conductor construction (nx AWG (mm))Cross section (mm²)Outer Ø (mm)Weight (g/m) max.Outer Ø (mm)Weight (g/m) max.Outer Ø (mm)Weight (g/m) max.Outer Ø (mm)Weight (g/m) max.Outer Ø (mm)Weight (g/m) max.
307/38 (0,10)0,060,681,060,811,34----1,372,38
287/36 (0,13)0,090,761,430,891,64----1,523,13
26*19/38 (0,10)0,150,862,081,022,381,353,131,222,981,734,31
2419/36 (0,13)0,251,022,981,173,571,444,461,373,872,036,39
2219/34 (0,16)0,401,194,461,375,201,756,401,575,652,389,37
2019/32 (0,20)0,601,406,701,577,591,989,081,788,042,7913,98
1819/30 (0,25)1,001,6510,121,8511,462,2312,952,0311,913,3021,27
1619/29 (0,29)1,251,8312,802,0614,582,4616,222,2614,733,6526,93
1419/27 (0,36)2,002,2619,642,4921,882,9224,102,7422,174,5242,25
1237/28 (0,32)3,002,7430,062,9732,893,3236,013,2032,595,4865,91
1037/26 (0,40)5,003,2846,283,7152,984,0954,323,9452,08--
8133/29 (0,29)8,30--5,2391,9796,2096,7392,9493,46--
Conductor Construction for 44A0211-26: Conductor Assembly 7/34 (0.16mm)

Shielded and sheathed cables

44A111X
(600 V)
1 conductor
44A121X
(1000 V)
1 conductor
44A181X
(600 V)
1 conductor
44A112X
(600 V)
2 conductors
Conductor size
(AWG)
Conductor construction (nx AWG (mm))Cross section
(mm²)
Outer Ø (mm)Weight (g/m) max.Outer Ø (mm)Weight (g/m) max.Outer Ø (mm)Weight (g/m) max.Outer Ø (mm)Weight (g/m) max.
307/38 (0,10)0,061,475,21----2,238,20
287/36 (0,13)0,091,555,80----2,389,40
2619/38 (0,10)0,151,576,841,736,85--2,5912,05
2419/36 (0,13)0,251,838,631,989,672,2611,762,9916,82
2219/34 (0,16)0,402,0110,712,2412,352,5715,483,3521,57
2019/32 (0,20)0,602,2614,732,5417,412,7719,193,7627,97
1819/30 (0,25)1,002,6220,682,8222,623,0224,114,3238,24
1619/29 (0,29)1,252,7924,553,0226,643,2528,134,6744,94
1419/27 (0,36)2,003,2234,083,4536,163,7338,695,5364,28
1237/28 (0,32)3,003,7047,774,1449,564,1952,386,5091,51

Spec 44 cables and cables - special cables

Def Stan 61-12 Part 18 Issue 3 Type 1
Danger- limiting switching cable in case of fire (flexible)

Conductor size (AWG)Conductor structure (n x mm)Ø over insulation (mm)Weight (g/m) max.Raychem order code
287/0,120,761,5044M9976-28-*
2619/0,100,892,8844M9976-26-*
2419/0,121,023,4544M9976-24-*
2219/0,151,174,9044M9976-22-*
2019/0,201,477,5644M9976-20-*
1819/0,251,7310,4244M9976-18-*
1619/0,301,9616,5044M9976-16-*
1437/0,252,3120,7344M9976-14-*
1237/0,302,6427,0844M9976-12-*
* Color coding appendix: see labeling system. Single and multi-core shielded and sheathed cables are available using Type 1 components.

Flexible, fine-stranded ladder construction

44A9083
(600 V)
Switching cable
44A9089
(600 V)
2 conductors, shielded
Conductor size (AWG)Conductor construction (n x AWG (mm))Cross section (mm²)Outer Ø (mm)Weight (g/m) max.Outer Ø (mm)Weight (g/m) max.
2237/38 (0,10)0,301,123,93,1819,2
2137/37 (0,11)0,381,194,63,3321,3
2037/36 (0,13)0,501,305,83,5324,6
1937/35 (0,14)0,591,406,83,7327,5
1837/34 (0,16)0,751,528,63,9932,1
1737/33 (0,18)1,001,6510,44,2937,7
1637/32 (0,20)1,201,8313,24,6544,6
1537/31 (0,23)1,502,0317,05,0553,9
1437/30 (0,25)1,882,2620,75,5163,4
1337/29 (0,29)2,502,5427,16,0778,6

Specifications and approvals

registration officeIndustryMilitary / AerospaceTE/Raychem
NASA Preferred Product ListLloyds Register of ShippingDef Stan 61-12 Part 26Spec 44
 Civil Aviation Authority Accessory Approval E11623Def Stan 61-12 Part 18 Type 1 flexible (maintenance) 
 TDE 74/P/74 and TDE 75/R/6 (British Rail)SAE AS-81044 (MIL-W-81044) NEMA WC-27500 (MIL-C-27500) 
  VG 95218 part 20, 21, 22, 23 and 1000 
  NATO supply numbers exist for most standard designs. 
  MSV34401 

Properties of Spec 44

Operating temperature range-65 °C to +150 °C
Rated voltage (thin-walled)600 V
Rated voltage (thick-walled)2500 V
Tensile strength and elongation at break of the insulation28 N/mm², 230 %
Notch cut resistance, 0.05 mm cutting edge, 0,05 mm Schneidepassed
Soldering iron resistance (370 ° C, 1 minute)passed
Shrinkage, 300 ° C< 1 %
cold resistance-65 °C
Withstand voltage (thin-walled)2500 V
Insulation resistance (+20 ° C)1500 MΩ *km
Resistance fuels, oils, solventspassed

Physical Properties

Small diameter

The Spec 44 cable with a rated voltage of 600 V has a wall thickness of 0.19 mm nom. 0.25 mm and Industry Military / Aerospace Lloyd's Register of Shipping 0.38 mm for equivalent PTFE and PVC cables in MIL-W-16878 and MIL-W-22759 or BS 3G210.

Low weight

Due to the low wall thickness and the low density of the materials considerable weight savings are achieved compared to similar PTFE lines with the same rated voltage. Eg: A 44A0111-AWG22 switch cable weighs 4.45 g / m max. An AWG22 PTFE switching cable according to MIL-W-22759 weighs 5.54 g / m max.

General processing

The flexibility of the Spec 44 cable and the ease with which it can be laid make it the easiest to install high performance cable. The stripping is done with conventional stripping tool. The tinned conductor, which is mainly used, is easy to solder or crimp. The insulation can be easily printed and requires no etching treatment before casting.

lengths

Spec 44 cables are available in long lengths and can be supplied for processing with automatic cutting and stripping machines.

Danger-limiting behavior In case of fire

 Federal Aviation Reg FAR-25passed
flammabilityBS EN 50265 vertical flame treatmentpassed
S424 14751 (Swedish fireplace)passed
NFC 32070 (2) (French fireplace)passed
lEC 60332 Teil 3 (Cable ladder)passed
Smoke and toxicity indexSmoke index, Def. Stan 61-12 (18)6 /m
Toxicity Index. Def Stan 61-12 (18)0,8 /m
Oxygen Index, BS EN 1S0-4589 Part 2 and Part 330 % oxygen
Temperature index, NES 715>300 °C

environmental properties

Operating temperature range

Spec 44 cables and cables can be used in temperature ranges from -65 ° C to +150 ° C and for a short time at temperatures up to +300 ° C. Thermal aging tests are performed periodically at temperatures of +200 ° C (168 h) and +300 ° C (6 h). There is no shrinkage of the cable insulation despite repeated heat cycles.

Chemical resistance

Molecularly crosslinked Spec 44 leads are highly resistant to many acids, bases, hydrocarbon based solvents, fuels, lubricants, water, many rocket propellants and oxidizers.

Mechanical properties

Spec 44 cables offer a better notch cut resistance than some cables with larger wall thicknesses. A 600V 44A0111 shunt with 0.19mm wall thickness has a 40% higher value than a 600V PTFE shunt with 0.25mm wall thickness.

Soldering iron / overload resistance

Due to the molecular crosslinking of the insulation, cables according to Spec 44 are infusible even at high temperatures. As a result, this line is very resistant to prolonged contact with soldering iron and has optimum protection in the event of overloading, while thermoplastic insulation would melt.

cold flow

The molecular crosslinking of the Spec 44 pipe prevents the cold flow of the insulation - a recognized problem for materials without cross-linking.

Low outgassing

For space applications, special Spec 44 constructions with low outgassing properties are available for use in high vacuum and high temperatures.

nominal voltage

The rated voltages for Spec 44 leads are 600 V for 0.19 mm wall thickness, 1000 V for 0.28 mm wall thickness and 2500 V for 0.48 mm wall thickness.

Resistance to arcing

The Spec 44 insulation provides complete resistance to arcing under dry and wet conditions at aircraft operating voltages.

The practical product finder contains more information on SPEC 44 and many other cables and cables.

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