The B-Series power controller has been a reliable product within the industrial marketplace for over 30 years. It offers a wide variety of ratings, features and options (from 15 to 3000 amps; voltage, current or watt limit; voltage, current or watt regulation; overcurrent shutdown and NEMA enclosures).

Spang acknowledges and appreciates the importance of servicing / supporting legacy products no longer run in volume. And while the B-Series controllers are no longer specified for new applications, they are still available within Spang's product line for direct replacement or spare parts. For new applications, please refer to our 650 Series, C-Series or Digital SCR Power Controllers.

Spang Power Electronics continues to have a strong technology focus with ongoing development of innovative and reliable power control and conversion equipment. These technology advantages allow Spang to easily retrofit existing control functionality that may have become outdated either by new process requirements or obsolescence. Spang’s retrofit capability is not limited to the upgrade of it’s own install base but also power equipment once supplied by market competitors. Please contact Spang with regards to retrofit / upgrade of any of the following B- Series controllers.

HB Series - 1PH / Phase Angle / 2 SCR

  • Phase (Frequency): Single Phase (50/60Hz)
  • Power Topology: 2 SCR - 2 Wire
  • Voltage Range: 120 to 575VAC
  • Current Range: 15 to 1000 Amps AC
  • Control Mode: Phase Angle Firing
  • Integral Fusing: One coordinated I2T fuses for semiconductor protection
  • Reference Signal: 0-5mA, 2-12mA, 4-20mA, 10-50mA, 0-10VDC, 10K Pot
  • Shutdown Contact: Lockout (inhibits firing)
  • Transient Voltage Protection: RC snubber & metal oxide varistor (MOV)
  • Soft Start: Transformer Inrush Protection
  • Optional Limits: RMS Current, Voltage, or Watt Limit
  • Optional Regulation: RMS Current, Voltage, or Watt Regulation
  • Overcurrent Shutdown (optional)
  • Mounting: Panel Mountable (standard) / NEMA Enclosures (optional)

KB Series - 1PH / Zero Crossover / 2 SCR

  • Phase (Frequency): Single Phase (50/60Hz)
  • Power Topology: 2 SCR - 2 Wire
  • Voltage Range: 120 to 575VAC
  • Current Range: 15 to 1000 Amps AC
  • Control Mode: Synchronous Firing (Zero Crossover - Burst)
  • Integral Fusing: One coordinated I2T fuses for semiconductor protection
  • Reference Signal: 0-5mA, 2-12mA, 4-20mA, 10-50mA, 0-10VDC, 10K Pot
  • Shutdown Contact: Lockout (inhibits firing)
  • Transient Voltage Protection: RC snubber & metal oxide varistor (MOV)
  • Optional Limits: RMS Current, Voltage, or Watt Limit
  • Optional Regulation: RMS Current, Voltage, or Watt Regulation
  • Overcurrent Shutdown (optional)
  • Mounting: Panel Mountable (standard) / NEMA Enclosures (optional)

FB Series - 3PH / Phase Angle / 3-Leg / 6 SCR

  • Phase (Frequency): Three Phase (50/60Hz)
  • Power Topology: Three Leg - 6 SCR - 3 Wire
  • Voltage Range: 120 to 575VAC
  • Current Range: 15 to 1300 Amps AC
  • Control Mode: Phase Angle Firing
  • Integral Fusing: Three coordinated I2T fuses for semiconductor protection
  • Reference Signal: 0-5mA, 2-12mA, 4-20mA, 10-50mA, 0-10VDC, 10K Pot
  • Shutdown Contact: Lockout (inhibits firing)
  • Transient Voltage Protection: RC snubber & metal oxide varistor (MOV)
  • Soft Start: Transformer Inrush Protection
  • Optional Limits: RMS Current, Voltage, or Watt Limit
  • Optional Regulation: RMS Current, Voltage, or Watt Regulation
  • Overcurrent Shutdown (optional)
  • Mounting: Panel Mountable (standard) / NEMA Enclosures (optional)

LB Series - 3PH / Zero Crossover / 2-Leg / 4 SCR / 2 Fuses

  • Phase (Frequency): Three Phase (50/60Hz)
  • Power Topology: Two Leg - 4 SCR - 3 Wire
  • Voltage Range: 120 to 575VAC
  • Current Range: 15 to 1300 Amps AC
  • Control Mode: Synchronous Firing (Zero Crossover - Burst)
  • Integral Fusing: Two coordinated I2T fuses for semiconductor protection
  • Reference Signal: 0-5mA, 2-12mA, 4-20mA, 10-50mA, 0-10VDC, 10K Pot
  • Shutdown Contact: Lockout (inhibits firing)
  • Transient Voltage Protection: RC snubber & metal oxide varistor (MOV)
  • Optional Limits: RMS Current, Voltage, or Watt Limit
  • Optional Regulation: RMS Current, Voltage, or Watt Regulation
  • Overcurrent Shutdown (optional)
  • Mounting: Panel Mountable (standard) / NEMA Enclosures (optional)

KB Series - 3PH / Zero Crossover / 2-Leg / 4 SCR / 3 Fuses

  • Phase (Frequency): Three Phase (50/60Hz)
  • Power Topology: Two Leg - 4 SCR - 3 Wire
  • Voltage Range: 120 to 575VAC
  • Current Range: 15 to 1300 Amps AC
  • Control Mode: Synchronous Firing (Zero Crossover - Burst)
  • Integral Fusing: Three coordinated I2T fuses for semiconductor protection
  • Reference Signal: 0-5mA, 2-12mA, 4-20mA, 10-50mA, 0-10VDC, 10K Pot
  • Shutdown Contact: Lockout (inhibits firing)
  • Transient Voltage Protection: RC snubber & metal oxide varistor (MOV)
  • Optional Features: RMS Current Limit, RMS Voltage Regulation
  • Mounting: Panel Mountable (standard) / Bezel Mounted (optional)

NB Series - 3PH / Zero Crossover / 3-Leg / 6 SCR / 3 Wire

  • Phase (Frequency): Three Phase (50/60Hz)
  • Power Topology: Three Leg - 6 SCR - 3 Wire
  • Voltage Range: 120 to 575VAC
  • Current Range: 15 to 1300 Amps AC
  • Control Mode: Synchronous Firing (Zero Crossover - Burst)
  • Integral Fusing: Three coordinated I2T fuses for semiconductor protection
  • Reference Signal: 0-5mA, 2-12mA, 4-20mA, 10-50mA, 0-10VDC, 10K Pot
  • Shutdown Contact: Lockout (inhibits firing)
  • Transient Voltage Protection: RC snubber & metal oxide varistor (MOV)
  • Optional Limits: RMS Current, Voltage, or Watt Limit
  • Optional Regulation: RMS Current, Voltage, or Watt Regulation
  • Overcurrent Shutdown (optional)
  • Mounting: Panel Mountable (standard) / NEMA Enclosures (optional)

JB Series - 3PH / Zero Crossover / 3-Leg / 6 SCR / 4 Wire

  • Phase (Frequency): Three Phase (50/60Hz)
  • Power Topology: Three Leg - 6 SCR - 4 Wire
  • Voltage Range: 120 to 575VAC
  • Current Range: 15 to 1300 Amps AC
  • Control Mode: Synchronous Firing (Zero Crossover - Burst)
  • Integral Fusing: Three coordinated I2T fuses for semiconductor protection
  • Reference Signal: 0-5mA, 2-12mA, 4-20mA, 10-50mA, 0-10VDC, 10K Pot
  • Shutdown Contact: Lockout (inhibits firing)
  • Transient Voltage Protection: RC snubber & metal oxide varistor (MOV)
  • Optional Limits: RMS Current, Voltage, or Watt Limit
  • Optional Regulation: RMS Current, Voltage, or Watt Regulation
  • Overcurrent Shutdown (optional)
  • Mounting: Panel Mountable (standard) / NEMA Enclosures (optional)