Product Information

PIX-RAY TUBE
D-205B
D-205BS
Stationary Anode X-ray Tube
Especially designed for dental X-ray unit andportable X-ray unit.

These tubes have focus 2.0, and are available
for a maximum tube voltage 125 kV or 100kV.

Installed in the same enclosure with the highvoltage transformer.

General Data
Electrical:
Circuit:High Voltage Generator ..................................... One-Peak High-Voltage Generator (Self-rectified)
Two-Peak High-Voltage Generator
Constant Potential High-Voltage Generator
Grounding ............................................................................................................. Center-grounded
Nominal X-ray Tube Voltage:
One-Peak High-Voltage Generator ....................................................................................... 125 kV
Two-Peak High-Voltage Generator ....................................................................................... 125 kV
Constant Potential High-Voltage Generator ......................................................................... 100 kV
Nominal Focal Spot Value .............................................................................................................. 2.0
Nominal Anode Input Power (at 1.0s): (See rating charts)
One-Peak High-Voltage Generator ...................................................................................... 2000 W
Two-Peak High-Voltage Generator ...................................................................................... 3000 W
Constant Potential High-Voltage Generator ........................................................................ 3300 W
Nominal Radiographic Anode Input Power:One-Peak High-Voltage Generator ...................................................................................... 2200 W
Two-Peak High-Voltage Generator ...................................................................................... 3800 W
Constant Potential High-Voltage Generator ........................................................................ 3600 W
Exposure Duty Cycle ....................................................................................................... 1:60 or more
(Exposure time: interval time)★The information contained herein is presented only as a guide for the application of our products. No responsibility is assumed by Canon Electron Tubes& Devices Co., Ltd. (CETD) for any infringements of patents or other rights of the third parties which may result from its use.
No license is granted by implication or otherwise under any patent or patent rights of CETD or others.
★The information contained herein may be changed without prior notice. It is therefore, advisable to contact to CETD before processing with the design ofequipment incorporating this product.

D-205B / D-205BS

Mechanical:
Dimensions:Overall Length ........................................................................................... See dimensional outline
Maximum Diameter ................................................................................... See dimensional outline
Target:Anode Angle .................................................................................................................. 20 degrees
Material ............................................................................................................................. Tungsten
Inherent Filtration ..................................................................................... At least 0.8 mm Al at 75 kV
X-ray Coverage ................................................................................... 354 × 354 mm at SID 490 mm
Weight (approx.):D-205B ...................................................................................................................... Approx. 430 g
D-205BS .................................................................................................................... Approx. 580 g
Cooling Method ............................................... Oil immersed (60℃ Max.) and convection oil cooling.
Tube Holding:
D-205B .............................................................. Holding the glass envelope of the anode end andcathode end or the screw of the anode shank.
D-205BS ........................................................................................... Holding the insulation cylinder-2-

D-205B / D-205BS

Absolute Maximum and Minimum Ratings(At any time, these values must not be exceeded.)Maximum X-ray Tube Voltage:
One-Peak High-Voltage Generator ....................................................................................... 125 kV
Two-Peak High-Voltage Generator ....................................................................................... 125 kV
Constant Potential High-Voltage Generator ......................................................................... 100 kV
Between Anode (or Cathode) and Ground:
One-Peak High-Voltage Generator ......................................................................................... 63 kV
Two-Peak High-Voltage Generator ......................................................................................... 63 kV
Constant Potential High-Voltage Generator ........................................................................... 50 kV
Minimum X-ray Tube Voltage ..................................................................................................... 50 kV
Maximum X-ray Tube Current: (See rating charts)
One-Peak High-Voltage Generator ........................................................................................ 40 mATwo-Peak High-Voltage Generator ........................................................................................ 80 mA
Constant Potential High-Voltage Generator .......................................................................... 70 mA
Maximum Filament Current ......................................................................................................... 5.0 A
Filament Voltage:
At Maximum Filament Current ........................................................................................ 5.0 ~ 6.7 V
Filament Frequency Limits ............................................................ DC or AC (Sine Wave) 0 ~ 20 kHz
Thermal Characteristics:
Anode Heat Content ............................................................................................................... 28 kJ
Maximum Anode Heat Dissipation ......................................................................................... 265 W
Maximum Radiographic Exposure Time ...................................................................................... 10 s

-3-

D-205B / D-205BS

Environmental Limits
Operating Limits (in dielectric oil):
Oil Temperature .............................................................................................................. 10 ~ 60 ℃
Oil Pressure ................................................................................................................ 70 ~ 140 kPa
Shipping and Storage Limits:
Temperature ................................................................................................................. -40 ~ 70 ℃
Humidity .......................................................................................................................... 10 ~ 90 %(No condensation)
Atmospheric Pressure ................................................................................................ 50 ~ 106 kPa-4-

D-205B / D-205BS

Maximum Rating Charts(Absolute maximum rating charts)
One-Peak High-Voltage Generator

Two-Peak High-Voltage Generator

Nominal Focal Spot Value: 2.0

Nominal Focal Spot Value: 2.070kV

4060kV60kV

8080kV

70kV50kV90kV80kV

110kVTUBE CURRENT [mA]

30125kV
201000.1

0.20.30.5 0.7 1235790kV

604020100kV
110kV
125kV

00.1

100.2 0.3

EXPOSURE TIME [s]0.5 0.7 1

Nominal Focal Spot Value: 2.07050kV
60504060kV
70kV
80kV90kV
100kV

30201000.10.2 0.3

23

EXPOSURE TIME [s]Constant Potential High-Voltage Generator

TUBE CURRENT [mA]

TUBE CURRENT [mA]

100kV

0.5 0.7 12EXPOSURE TIME [s]-5-357105710D-205B / D-205BS

Emission & Filament Characteristics
One-Peak High-Voltage Generator

Two-Peak High-Voltage Generator

Nominal Focal Spot Value: 2.0

Nominal Focal Spot Value: 2.040

Ef
10

4.0

6.0
125kV40

5.0

Ef20

4.00
3.5

3.0
5.0

4.5

60

4.0

4.5

FILAMENT CURRENT [A]FILAMENT CURRENT [A]This graph indicates typical characteristics.

Constant Potential High-Voltage Generator
Nominal Focal Spot Value: 2.0
10.0609.050kV

50

8.040

7.0

100kV
Ef30

6.020

5.0

104.00
3.5

4.0

4.5

3.0
5.0

FILAMENT CURRENT [A]This graph indicates typical characteristics.

-6-FILAMENT VOLTAGE [V]

70

3.0
5.0

FILAMENT VOLTAGE [V]5.0

TUBE CURRENT [mA]

20

FILAMENT VOLTAGE [V]125kV

TUBE CURRENT [mA]

TUBE CURRENT [mA]

6.0

4.0

7.0

60kV

60kV
300
3.580

7.0D-205B / D-205BS

Anode Heating / Cooling Curve
28280W

230W

HEAT STORAGE [kJ]

2420170W

1612
COOLIMG
84HEATING001234TIME [min]-7-567D-205B / D-205BS

Dimensional Outline of D-205B
Unit: mm

O 16120 ±565 ±15

M5 10DEEPO52 MAXCENTRAL X-RAY

12 MAXFOCAL SPOT

(C20.4O2)FN

CENTRAL X-RAY
C1F

SHORT PIN
F: FILAMENTC1, C2 : CATHODE
N: NOT FOR USE-8-D-205B / D-205BS

Dimensional Outline of D-205BS
Unit: mm

O 60 ±0.5O 16

CENTRAL X-RAY

O 25

130 ±365 ±1

INSULATION CYLINDER60

M5 10DEEP

2 MAX65

FOCAL SPOTC22(O0.4)

FN

CENTRAL X-RAYC1FSHORT PINF: FILAMENT
C1, C2 : CATHODE
N: NOT FOR USE-9-Marketing Engineering Group, Sales Department
1385, Shimoishigami, Otawara-shi, Tochigi 324-8550, Japan
Tel: +81-287-26-6666 Fax: +81-287-26-6060
https://etd.canon･The head office of Canon Electron Tubes & Devices Co., Ltd. has been certified to meet all the requirements of Environmental Management System ISO14001.
･Canon Electron Tubes & Devices Co., Ltd. has been certified to meet all the requirements of Quality Management Systems ISO9001 and ISO13485.
Product scope is referred to the following URL. https://etd.canon/eng/company/quality.htm.

PE-D-205B/BS 2018-11