FG235A

Water-cooled ignitron for welder-control and rectifier service. Controlled mercury-pool discharge handles extremely high industrial currents.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: -

Description

The FG-235-A is a steel-jacketed water-cooled ignitron capable of very high peak currents, especially suited to resistance-welder control and also usable for intermittent rectifier service.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: -
Base pins: -
Nominal heater voltage: -
Nominal heater current: -
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

1 physical section, each with unique specifications.

Section 1

IgnitronPowerSwitch

X-ray radiationInterelectrode capacitances

Rectifier peak inverse voltage: 500 V
Rectifier nominal output current: 100 mA
Rectifier peak forward current: 1600 A
Rectifier forward voltage drop: 12 V

Ignitron. Intermittent-rectifier service values promoted; welder-control values preserved as parameters.

Source-dependent data

Operating conditions by source

Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.

Data set 01

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

IgnitronPowerSwitch

Other

Welder Maximum Demand
1200 kVA
WelderControl 250to600Vrms
Welder Maximum Average Anode Current
140 A
WelderControl
Rectifier Surge Anode Current
6000 A
IntermittentRectifier 0.15Second

Characteristic

Ignitor Required Positive Voltage
200 V
Ignition
Ignitor Required Current
30 A
Ignition