Voltage Drop (typical)Tube Voltage Drop (plate current 350 mA)25V
DC Output Current (max)DC Plate Current (max)200mA
Peak Anode Current (surge)Peak Plate Current1,200mA
Heater
Heater VoltageHeater Voltage6.3V
Heater CurrentHeater Current1.2A
Notes
Base is Small-Button Duodecar 12-Pin (JEDEC No. E12-70), basing designation 12BL. This is the American 'Duodecar' base, equivalent to the European 'Duodekal' designation.
Pins 2, 3, 5, 6, 8, 9, and 11 are all No Connection (same as pin 2). Only pins 1/12 (heater), 4/10 (plate), and 7 (cathode) are active.
Maximum heater-cathode voltage is extremely high: 5000V (heater negative) / 300V (heater positive). The 5000V peak negative rating is critical in damper service where the cathode sees horizontal flyback pulses.
PIV rating of 5000V applies to operation in a 525-line, 30-frame TV system where the duty cycle of the horizontal voltage pulse does not exceed 15% of one horizontal scanning cycle.
The DC component of the heater-cathode voltage must not exceed 900V (heater negative) or 100V (heater positive).
Sams substitution guide lists 6BE3 and 6BE3A as direct interchangeable substitutes.
MIL-HDBK-213A classifies this as a receiving diode, damper.
Pin Layout — Duodekal
1Heater
2
Socket-Compatible Tubes ⚠ Not electrically compatible