Signotron Tower.
Plot J1-6, Block - EP, Sector - V
Salt Lake Electronics Complex
Kolkata - 700 091.
Phone: +91 - 33 - 2357 3481/7274
Fax: +91 - 33 - 2357 7877
Mail: info@signotron.com
Company Overview
Promoted by technical entrepreneurs from
IIT Kharagpur in 1985, Company initially
started with manufacturing products for
Industrial Control and Pollution Control.
Gradually focus shifted to Power Electronics
products,
embedded
electronics
and
renewable energy.
Company Overview
• Company have 50,000 sq. ft. space available for
manufacturing facility in the prestigious electronics
complex, Salt Lake, Kolkata.
• Companies human resource:Company has a total strength of 116 employees.
 Graduate and Post Graduate Engineers.
 Diploma Engineers, Technicians.
 Office and Commercial staffs.

• Quality Certification – ISO 9000-2008.
Company History & Milestones
 1985 : Company incorporated with a Setup of a
small manufacturing facility in South Kolkata.
 1985-1994 : Company’s major thrust had been in
manufacturing specialized Industrial Control
products for Burner and Pollution Control
- UV Flame Detector and Amplifier.
- Microprocessor based Back Feed Sequence Controller
 Having more than 10000 installations in India and
abroad, the above products were supplied in
Steel and Cement Plants, Oil refineries and
Chemical Industries
Company History & Milestones
Year 1991.
 A major diversification to Power Electronics
products in Rolling Stocks .
 Introduced in Indian Railways MOSFET based
Voltage Regulators for Motor Generator Sets of
DC EMU’s.
 Developed energy efficient electronic lamp
ballast for Railway Coaches.
 Implemented for the first time DC-DC Converter
for Head Light Application in Indian Railways in
lieu of rheostats.
Company History & Milestones
Year 1996.
Inverters 0.5 KVA to 5 KVA for Pantry Car
applications.
5 KW DC-DC Converters for Hotel load
applications of Diesel Locomotives for Sri
Lanka Railways.
Year 2000.
First prototype unit for 3 phase Compact
drive for fractional Horse Power Motors for
Diesel Locomotives in lieu of small DC
Motors.
Company History & Milestones
Year 2002.
Successful completion of field trials and
acceptance of small AC Motors by Indian
Railways for 100% replacement of existing
small DC Motors.
Year 2003.
Commencement of Bulk Production of
3 phase Compact drives. Till date 80% diesel
fleet of 4500 locomotives of Indian Railways
has been installed with such compact drives.
Total field population around 14000 as on
date.
Company History & Milestones
Year 2004.
Thyristor based Battery Charge Discharging
regenerative panel for VRLA batteries upto
70 KW.
Year 2009.
28 KW naturally cooled, Battery charger
with active P.F.C. for SGAC coaches of Indian
Railways. Supplied more than 150 units to
Indian Railways till date.
Company History & Milestones
Year 2010.
Grid tied Solar Inverter upto 100 KW rating.
Voltage Controlled Static VAR compensator
for Power Factor improvement.
IGBT based Battery Charge / Discharge
panel with active PFC upto 70 KW.
Company History & Milestones
Future developments.
 250 KWp grid tied solar inverter.
 25 KVA Inverter for SGAC coaches of
Indian Railways.
 180 KVA Auxiliary Converter for electric
locos.
Design & Development
Manufacturing Facilities
ELECTRONICS.
Facility for assembly and testing of PCBs with anti-static ESD protection
flooring and separate dust free clean room.
Surface mounted PCB manufacturing facility, equipped with machines like
Screen Printer, Automatic "Pick & Place" machine, temperature controlled
reflow oven, Ultrasonic PCB Cleaner etc. Facilities of these are available
with Signotron approved outsourced vendors.
 Lead free reflow soldering facility.
 Wave soldering facility.
 Electronic Manufacturing Service (EMS).
 Automatic SMT pick & Place machine.
Manufacturing Facilities
Place & Pick Machine
Place & Pick Machine
Hot Air Reflow Soldering Machine
Assembly Section
Assembly Section
Manufacturing Facilities
Assembly room with Ionizer
Heat Chamber
Heat Chamber
Manufacturing Facilities
MECHANICAL.
Full fledged CNC machine shop with modern machines including the
followings:-
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CNC lathe machines.
Gear hobbing machines,
Jig boring machine.
Multi-spindle drilling machine.
Cylindrical grinding machine.
Vibro-benz vibratory.
De-burring machine.
Ultrasonic cleaning machine etc.
Facilities of these are available with Signotron approved outsourced vendors.
Manufacturing Facilities
CNC Machine (Bending)
CNC Machine (Punching)
Customers of Signotron
Zonal Railways.
Other Organisations.
Servicing Network.