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Twinax Contacts for MIL-DTL-38999

General Description, Application Data - Size 10 &12

Amphenol®Twinax Contacts-Weredesignedfor

use with twinax cable in Data Bus systems Twinax contacts

provide the following benefits:

• Protection from magnetic interference

• Protection from electrostatic interference including nuclear

electromagnetic pulse

• Meets parameters defined by MIL-STD-1553B

• Maintains shield integrity through a multi-pin circular

connector and does not require contact polarization within

the insert

SIZE 10 & 12 CONCENTRIC TWINAX

CONTACTS

The size 12 concentric twinax contact interface was developed for

JN1104 EuroFighter contacts, and can be used in any size 12

cavity M38999 I, II or III or SJT connector

Features:

• Operating temperature –55°C to 175°C

• Pins are scoop-proof

• Meets performance levels of M38999 connector

• 4 components, gold plated crimp termination

• For use with a variety of cables (See chart below)

TYPICAL ELECTRICAL PERFORMANCE

Size 10 & 12 Concentric Twinax Contacts

Voltage Rating: 500 Vrms max @ sea level

Contact Resistance:

Center @ 1 Amp, 55 millivolts max voltage drop @ 25°C

Intermediate @ 1 Amp, 55 millivolts max voltage drop @ 25°C

Outer @ 12 Amps, 85 millivolts max voltage drop @ 25°C

Operating Frequency: 0–30 MHz

Dielectric Withstanding Voltage:

Center to Intermediate 800 VAC Rms @ Sea Level

Intermediate to Outer 500 VAC Rms @ Sea Level

SIZE 10 & 12 CONCENTRIC TWINAX CONTACTS FOR USE IN D38999 CONNECTORS

For use with

Cable

Concentric Twinaxial Contact

Part Number

(Termination Instruction Sheet)**

Contact Size

Comments

Connector

Series

Pin

Socket

M17/176-00002,

ST5M1212-002,

TWC-78-1

21-033909-025

(L-2092-G)

21-033908-025

(L-2092-G)

12

JN1104 Interface

D38999 Series I, III

0024A0024, Fileca

F2709-13-CA

21-033909-028

(L-2092-G)

21-033908-028

(L-2092-G)

EPD32263A,10612,

GSC-12-2548-00

21-033909-029

(L-2092-H)

21-033908-029

(L-2092-H)

ASNE0849,

5PTM1T04-1

21-033909-081

(L-2092-AB)

21-033908-081

(L-2092-AB)

VG95218T023D002

21-033909-091

(L-2092-AC)

21-033908-091

(L-2092-AC)

VG95218T023D002,

55PC1221-24

21-033909-101

(L-2092-AC)

21-033908-101

(L-2092-AC)

Same as -91 except

new ferrule with wire

support

M17/176-00002,

GSC-12-2549-00

21-033640-025

(L-2092-W)

12

JN1104 Interface

D38999 Series II

0024A0024

21-033640-028

(L-2092-V)

5M2022-003

21-033844-001

(L-1255-A)

21-033843-001

(L-1255-B)

10

Supplied with

Thermal fit sleeve

D38999 Series I, III

**Termination instructions are packaged with each contact and can be found on-line at: www amphenol-aerospace com/serviceinstructions asp

Concentric Twinax Contacts Size 12

Unassembled Components of Size

12 Concentric Twinax Contact

Cable Illustration - Twinax Contact