BOX COUPLERS

  • 55 dB CMR
  • Standard triax connectors
  • Ruggedized, sealed cases
  • Excellent EMI shielding
  • Low cost, quick delivery

Electrical Specifications (In accordance with MIL-STD-1553B)

Transformer turns ratio (N) 1.41:1 (+/-3%)
Transformer droop < 20%
Overshoot & ringing < +/- 1v pk-pk
Common mode rejection > 55 dB at 1MHz
Fault isolation resistance (R1, R2, ...) 59.0 Ohms, 1%, 2 watt (MIL-R-39007)
Operating temperature -55°C to +125°C
Construction CRS case, tin-lead plated and painted for 100% EMI & environmental seal
Bus termination resistor 78.7 Ohms, 1%, 2 watt (MIL-R-39007)
1553B Bus Coupler Schematic (4 stub coupler)

Environmental Specifications

Seal Test Immersion MIL-STD-202, Method 104, Cond. A
Life MIL-STD-202, Method 108, 2000 hours (12 weeks) at 125°C (14V pk-pk, 1 MHz sq. wave input at stub, 100% duty cycle and 78 Ohm Bus termination)
Vibration, random 20 Hz - 2000 Hz, 24.0 Grms, 0.5hr/axis
Vibration, Random, Gunfire 300 Hz - 2000 Hz, 64.5 Grms, 0.5hr/axis
Vibration, Sinusoidal 30 Hz - 300 Hz, 0.04 DA, 75 min. per axis
Mechanical Shock MIL-STD-202, Method 213, Cond. I
Thermal Shock MIL-STD-202, Method 107, condition B, -65°C to 125°C, 10 cycles
Moisture Resistance MIL-STD-202, Method 106
Resistance to Solvents MIL-STD-202, Method 215

Standard Models

No. of stubs Coupler Model no. Conn. Type Mating conn. Wt.- Grams Bus Terminator Stub Terminator EMI/RFI cap Price Request
1 BC1010 BJ77 PL75 75 RT78-1 RT1.5K-1 RT00-1 RFQ
1 BC1020 BJ371 PL375 75 RT78-2 RT1.5K-2 RT00-2 RFQ
1 BC1030 BJ157 PL155 75 RT78-3 RT1.5K-3 RT00-3 RFQ
1 BC1040 BJ3157 PL3155 75 RT78-4 RT1.5K-4 RT00-4 RFQ
2 BC2010 BJ77 PL75 155 RT78-1 RT1.5K-1 RT00-1 RFQ
2 BC2020 BJ371 PL375 155 RT78-2 RT1.5K-2 RT00-2 RFQ
2 BC2030 BJ157 PL155 155 RT78-3 RT1.5K-3 RT00-3 RFQ
2 BC2040 BJ3157 PL3155 155 RT78-4 RT1.5K-4 RT00-4 RFQ
3 BC3010 BJ77 PL75 200 RT78-1 RT1.5K-1 RT00-1 RFQ
3 BC3020 BJ371 PL375 200 RT78-2 RT1.5K-2 RT00-2 RFQ
3 BC3030 BJ157 PL155 200 RT78-3 RT1.5K-3 RT00-3 RFQ
3 BC3040 BJ3157 PL3155 200 RT78-4 RT1.5K-4 RT00-4 RFQ
4 BC4010 BJ77 PL75 250 RT78-1 RT1.5K-1 RT00-1 RFQ
4 BC4020 BJ371 PL375 250 RT78-2 RT1.5K-2 RT00-2 RFQ
4 BC4030 BJ157 PL155 250 RT78-3 RT1.5K-3 RT00-3 RFQ
4 BC4040 BJ3157 PL3155 250 RT78-4 RT1.5K-4 RT00-4 RFQ
6 BC6010 BJ77 PL75 500 RT78-1 RT1.5K-1 RT00-1 RFQ
6 BC6020 BJ371 PL375 500 RT78-2 RT1.5K-2 RT00-2 RFQ
6 BC6030 BJ157 PL155 500 RT78-3 RT1.5K-3 RT00-3 RFQ
6 BC6040 BJ3157 PL3155 500 RT78-4 RT1.5K-4 RT00-4 RFQ
8 BC8010 BJ77 PL75 375 RT78-1 RT1.5K-1 RT00-1 RFQ
8 BC8020 BJ371 PL375 375 RT78-2 RT1.5K-2 RT00-2 RFQ
8 BC8030 BJ157 PL155 375 RT78-3 RT1.5K-3 RT00-3 RFQ
8 BC8040 BJ3157 PL3155 375 RT78-4 RT1.5K-4 RT00-4 RFQ

Available with single and dual internal bus terminations. Add -1R or -2R to the basic part number for single or dual termination.

Qualified designs available for various environmental conditions. Send your requirements to info@paaltech.com for a quick quote.