Product Information PI
TOSHIBA X-RAY TUBE
D-205B / D-205BS
Stationary Anode X-ray Tube
Especially designed for dental X-ray unit and
portable 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 high
voltage transformer.
General Data
Electrical:
Circuit: (1)
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
Exposure Duty Cycle ..................................................................................................... 1:60 or more
(Exposure time: interval time)
Note (1) Since the version of a product differs with circuits to use, please choose the product that
was in the circuit to use. (Please use it in the circuit indicated by specifications)
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 50 kV
X-ray Coverage .................................................................................. 354 × 354 mm at SID 490 mm
★The information contained herein is presented only as a guide for the applications of our products.
No Responsibility is assumed by TOSHIBA ELECTRON TUBES & DEVICES CO.,LTD.(TETD) 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 TETD or others.
★The information contained herein may be changed without prior notice. It is therefore advisable to contact TETD before proceeding with the design of
equipment incorporating this product.
D-205B / D-205BS
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 and
cathode end or the screw of the anode shank
D-205BS ........................................................................................ Holding the insulation cylinder
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 mA
Two-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
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
-2-
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: 2.0
70kV 60kV 60kV
40 80
80kV 70kV
50kV
90kV
80kV
100kV
30 110kV 60 90kV
TUBE CURRENT [mA]
TUBE CURRENT [mA]
125kV
20 40
100kV
110kV
125kV
10 20
0 0
0.1 0.2 0.3 0.5 0.7 1 2 3 5 7 10 0.1 0.2 0.3 0.5 0.7 1 2 3 5 7 10
EXPOSURE TIME [s] EXPOSURE TIME [s]
Constant Potential High-Voltage Generator
Nominal Focal Spot Value: 2.0
70
50kV
60kV
60
70kV
TUBE CURRENT [mA]
50
80kV
40 90kV
100kV
30
20
10
0
0.1 0.2 0.3 0.5 0.7 1 2 3 5 7 10
EXPOSURE TIME [s]
-3-
D-205B / D-205BS
Emission & Filament Characteristics
One-Peak High-Voltage Generator Two-Peak High-Voltage Generator
40 7.0 80 7.0
60kV 60kV
FILAMENT VOLTAGE [V]
FILAMENT VOLTAGE [V]
30 6.0 60 6.0
TUBE CURRENT [mA]
TUBE CURRENT [mA]
125kV 125kV
20 5.0 40 5.0
Ef Ef
10 4.0 20 4.0
0 3.0 0 3.0
3.5 4.0 4.5 5.0 3.5 4.0 4.5 5.0
FILAMENT CURRENT [A] FILAMENT CURRENT [A]
Note: This graph indicates typical characteristics. Note: This graph indicates typical characteristics.
Constant Potential High-Voltage Generator
70 10.0
60 9.0
50kV
FILAMENT VOLTAGE [V]
TUBE CURRENT [mA]
50 8.0
40 7.0
100kV
Ef
30 6.0
20 5.0
10 4.0
0 3.0
3.5 4.0 4.5 5.0
FILAMENT CURRENT [A]
Note: This graph indicates typical characteristics.
-4-
D-205B / D-205BS
Anode Heating / Cooling Curve
28
280W
230W
24
HEAT STORAGE [kJ]
20
170W
16
12
COOLIMG
8
4
HEATING
0
0 1 2 3 4 5 6 7
TIME [min]
-5-
D-205B / D-205BS
Dimensional Outline of D-205B
Unit: mm
φ１６
Ｍ５ １０ＤＥＥＰ
６５±１
１２０±５
φ５２ＭＡＸ
ＣＥＮＴＲＡＬ Ｘ－ＲＡＹ
ＦＯＣＡＬ ＳＰＯＴ
１２ＭＡＸ
４）
２ ０．
（φ
Ｃ２ Ｆ
Ｎ
ＣＥＮＴＲＡＬ Ｘ－ＲＡＹ
Ｃ１ Ｆ ＳＨＯＲＴ ＰＩＮ
Ｆ ：ＦＩＬＡＭＥＮＴ
Ｃ１，Ｃ２：ＣＡＴＨＯＤＥ
Ｎ ：ＮＯＴ ＦＯＲ ＵＳＥ
-6-
D-205B / D-205BS
Dimensional Outline of D-205BS
Unit: mm
φ６０±０．５
φ１６
Ｍ５ １０ＤＥＥＰ ＩＮＳＵＬＡＴＩＯＮ ＣＹＬＩＮＤＥＲ
６５±１
６０
１３０±３
ＣＥＮＴＲＡＬ Ｘ－ＲＡＹ
ＦＯＣＡＬ ＳＰＯＴ
φ２５
６５
２ＭＡＸ
）
０ ．４
２
（φ
Ｃ２ Ｆ
Ｎ
ＣＥＮＴＲＡＬ Ｘ－ＲＡＹ
Ｃ１ Ｆ ＳＨＯＲＴ ＰＩＮ
Ｆ ：ＦＩＬＡＭＥＮＴ
Ｃ１，Ｃ２：ＣＡＴＨＯＤＥ
Ｎ ：ＮＯＴ ＦＯＲ ＵＳＥ
-7-
D-205B / D-205BS
OVERSEAS SUBSIDIARIES AND AFFILIATES
EU REPRESENTATIVE
・TOSHIBA ELECTRONICS EUROPE GMBH
HANSAALLEE 181 40549 DÜSSELDORF, GERMANY
PHONE +49 (211) 5296-107 FAX +49 (211) 5296-402
For Sales & Technical Services, please contact the following representative:
・TOSHIBA ELECTRONICS EUROPE GMBH
HANSAALLEE 181 40549 DÜSSELDORF, GERMANY
PHONE +49 (211) 5296-107 FAX +49 (211) 5296-402
・TOSHIBA AMERICA ELECTRONIC COMPONENTS, INC.
2150 EAST LAKE COOK ROAD, SUITE 310
BUFFALO GROVE, ILLINOIS 60089 USA
PHONE +1 (847) 484-2400 FAX +1 (847) 541-7287
・TOSHIBA ELECTRON DEVICES & MATERIALS (SHANGHAI) CO., LTD. (TEMS)
RM1606, SH-PLAZA,
No.336, XIZANG ROAD (MIDDLE), SHANGHAI, 200001, CHINA
PHONE +86 (21) 6361-0077 FAX +86 (21) 6351-5760
(Product Development Engineering Department)
1385 SHIMOISHIGAMI, OTAWARA-SHI, TOCHIGI-KEN, 324-8550, JAPAN
PHONE: +81-287-26-6666 FAX: +81-287-26-6060
http://www.toshiba-tetd.co.jp/
･Toshiba Electron Tubes & Devices Co., Ltd. meets the Environmental Management System Standard, ISO14001.
･Toshiba Electron Tubes & Devices Co., Ltd. meets internationally recognized Standards for Quality Management System ISO9001, ISO13485.
