SCR Firing Boards

Enerpro SCR Firing Boards: The Industry Standard

Enerpro SCR firing boards have been the industry standard for more than 35 years. Available in a wide variety of configurations, OEMs chose Enerpro products to ensure the performance of their power electronics product. Our proprietary LSI technology delivers cost-effective and reliable high current “picket fence” gate pulses, soft-start circuitry and voltage or current control of the delay angle. ENERPRO firing boards can be combined with optional auxiliary firing boards, regulator boards, and special purpose boards to provide a complete control package.

Single Phase

From the low-cost FCRO2100 to the two- or four-SCR FCRO4100 firing board, Enerpro single phase firing boards provide the value and reliability Enerpro products are known for. The FCRO2100 is a two-SCR firing board for single phase applications including motor/generator controllers and industrial power supplies. The FCRO4100 is built for single phase applications like AC controllers, two-quadrant bridge rectifiers, and low-cost motor field exciters. With the addition of the PTIR-1 or PTIFL1A boards, the FCRO4100 firing board may also be used in four-quadrant bridge converter configurations. Read more…

FCRO2100 Single Phase Firing Board

Three Phase

The industry standard Enerpro FCOG6100 remains a proven solution for industrial power supplies, battery chargers, motor and generator controllers. Other boards feature additional six gate outputs and polarity transition circuits, high voltage tolerant, high output gate pulse transformers and increased creepage distances. Also available are variable frequency versions of the FCOG6100 capable of operation over a decade frequency range of 5KHz. Read more…

FCOG6100 Three Phase Firing Board

Six Phase

Enerpro’s six phase, 12 SCR boards are designed specifically for twelve-pulse rectifiers and controllers. Gain integral auto-balance circuits to enhance phase balance and add the FCOA1200 auxiliary firing board to maintain all the functionality at line voltages to 900 Vac. Read more…

FCOG1200 Six Phase Firing Board

Auxiliary Firing Boards

Each ENERPRO auxiliary firing board provides the ability to drive six to twelve additional SCRs. You can also daisy-chain up to five auxiliary firing boards with a single Enerpro firing board. Auxiliary firing boards can be used with the FCRO4100, FCOG6100, FCOG1200 and FCOVF6100 models. Read more…

FCOG1200 Six Phase Firing Board


Enerpro, Inc.
Global Headquarters
99 Aero Camino
Goleta, CA 93117

Tel: (805) 683-2114
Fax: (805) 964-0798


ICT Power Company Inc.
1220 Corporate Dr.
Burlington, ON L7L 5R6

Tel: 905.631.8494
Fax: 905.631.8495


MPE Cathodic AS
P. O. Box 74
N1581 Rygge, Norway
Marine & Offshore
Jotun ICCP Specialists
Tel: +47 69 23 29 00
Fax: +47 69 23 29 01
Mob: +47 95 11 81 82


Andrew Chettle
Power Products International Limited
Commerce Way
Kent TN8 6ED
Tel: 01732 866424
Fax: 01732 866399


Bruno Passerini
G.P.S. – Green Power Solutions SRL
Via Venezia 34D
10088 Volpiano – Torino
Tel: +39 011 9882251
Fax: +39 011 9881358


Design Support
In-Service Support
Toll Free: (877) 648-2114
(805) 683-2114

Sales Policy
RMA Policy


Jane Lu
Tackoh Enterprises (HK)
Room 1604, Arion Commercial Centre
2-12 Queen’s Road, West
Hong Kong
Tel: 852 2543 0186
Fax: 852 2542 2114
Mob: 852 9379 8172


Andes Controls, Power and Automation
Cristián Ladisla Bohn
Av. Holanda 099, Oficina 1101
Providencia, Santiago, Chile
Tel: +56 2 2306 6202


Akom Chantakhun
CBC International Limited
56/12-13 Soi Prayasuren 45
Samwatawantok, Klongsamwa
Bangkok, 10510
Tel: 662 902 6106-9
Fax: 662 914-3009