- 1856D
- B&k Precision
- Frequency Counters 3.5 GHZ FREQUENCY COUNTER
- 1856D-NIST
- B&k Precision
- Frequency Counters FREQ. COUNTER W/NIST Cert of Calibration
- 1856D
- B&k Precision Corporation
- Bench 2-CH RS232C Interface 0.1Hz to 3.5GHz Frequency Counter
- F1856D1400
- Crydom Corporation
- 55A Iout, 1.4kV Vrrm General Purpose Silicon Rectifier
- F1856D600
- Crydom Corporation
- 50A Iout, 600V Vrrm General Purpose Silicon Rectifier
- UC1856DW
- Texas Instruments
- Improved Current Mode PWM Controller