RF connector SJT

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Overview
The SJT connector family is an Amphenol Socapex circular connector series derived from MIL-DTL-38999 Series I & II (Series 1.5). It uses a reverse-bayonet, quick 1/4-turn coupling and is designed for harsh-environment military and aerospace applications. Multiple shell types and receptacle styles are available, with RoHS & REACH compliant options.

Key features

• Derived from MIL-DTL-38999 Series I & II (Series 1.5)
• Reverse-bayonet coupling with quick 1/4-turn mating
• More than 60 standard contact arrangements (1 to 128 contacts)
• Ruggedised design with high resistance to shock and vibration
• Multiple materials and platings; RoHS & REACH compliant finishes available

Applications

• Military vehicles
• Battlefield communications (C5ISR)
• Military and aerospace avionics

Product benefits

• 100% scoop-proof contact design; compatible with MIL-DTL-38999 Series I lengths
• Standard mounting dimensions (MIL-DTL-38999, Series II)
• Receptacle styles: square flange, jam nut, in-line
• Fast mating: fully mated with a 1/4 turn of the coupling nut
• Compliant with European specifications PAN6433-2 and LN29729

Materials & platings

• Aluminium options: olive drab cadmium, nickel, black zinc nickel
• RoHS-compliant finishes available

Contacts types & terminations

• Over 60 contact arrangements
• Contact sizes from 22D to 12
• Supports power, signal, coax and high-speed (#12) contacts
• Termination types: crimp and PCB tails

Environmental characteristics

• Mating cycles: 500
• Operating temperature: -65°C to 175°C (up to 200°C depending on material/plating)
• Aluminium corrosion resistance: 48 to 500 hours depending on plating
• Ingress protection: IPX7 when mated and fully cabled

Electrical characteristics

• Shell-to-shell conductivity: ≤5 mΩ
• RF performance: 100 MHz to 10 GHz, minimum attenuation 50 dB
• Contact current rating: 5 A to 23 A depending on contact size

Technical specifications

• Model family: SJT (38999 Series derived)
• Coupling: reverse bayonet, quick 1/4-turn mating
• Contact arrangements: >60 standard arrangements (1 to 128 contacts)
• Contact sizes: 22D to 12
• Contact types: power, signal, coax, high-speed
• Terminations: crimp, PCB tails
• Mating durability: 500 cycles
• Temperature range: -65°C to 175°C (up to 200°C depending on material/plating)
• Ingress protection: IPX7 when mated and cabled
• Shell conductivity: ≤5 mΩ
• RF: 100 MHz–10 GHz, min attenuation 50 dB
• Current rating: 5 A–23 A (by contact size)