FG259B

Water-cooled ignitron for industrial power rectifiers and welding control. Controlled mercury discharge handles heavy power-system current.

Directly heatedCold cathodeCommon cathodeDissimilar

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

Description

The FG-259-B is a steel-jacketed water-cooled ignitron for industrial DC power rectifiers and welder-control service, combining high current capacity with controlled ignition.

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: 2100 V
Rectifier nominal output current: 75 mA
Rectifier peak forward current: 600 A

Ignitron. Higher-voltage 2100-V rectifier-service column promoted; alternate 900-V / higher-current column 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

Alternate Rectifier Peak Anode Voltage
900 V
RectifierService HighCurrentColumn
Alternate Continuous Average Anode Current
100 A
RectifierService 900VColumn
Alternate Instantaneous Anode Current
900 A
RectifierService 900VColumn
Surge Current
4500 A
RectifierService 2100VColumn 0.15Second
Minimum Water Flow
1.5 gal/min
ContinuousAverageCurrent