1. Product profile
1.1 General description
High-voltage switching diodes, encapsulated in a very small Surface-Mounted
Device (SMD) plastic package.
1.2 Features
1.3 Applications
1.4 Quick reference data
[1] Single diode loaded.
[2] When switched from IF= 10 mA to IR= 10 mA; RL= 100 Ω; measured at IR= 1 mA.
BAS21W series
High-voltage switching diodes
Rev. 01 — 9 October 2009 Product data sheet
Table 1. Product overview
Type number Configuration Package Package
configuration
Nexperia JEDEC
BAS21W single SOT323 SC-70 very small
BAS21AW dual common anode
BAS21SW dual series
nHigh switching speed: trr ≤50 ns nLow capacitance: Cd≤2pF
nLow leakage current nVery small SMD plastic package
nHigh reverse voltage: VR≤250 V nAEC-Q101 qualified
nHigh-speed switching nVoltage clamping
nGeneral-purpose switching nReverse polarity protection
Table 2. Quick reference data
Symbol Parameter Conditions Min Typ Max Unit
Per diode
IFforward current [1] - - 225 mA
IRreverse current VR= 200 V - - 100 nA
VRreverse voltage - - 250 V
trr reverse recovery time [2] --50ns
© Nexperia B.V. 2017. All rights
reserved
BAS21W_SER_1
Product data sheet Rev. 01 — 9 October 2009 2 of 11
Nexperia BAS21W series
High-voltage switching diodes
2. Pinning information
3. Ordering information
Table 3. Pinning
Pin Description Simplified outline Graphic symbol
BAS21W
1 anode
2 not connected
3 cathode
BAS21AW
1 cathode (diode 1)
2 cathode (diode 2)
3 common anode
BAS21SW
1 anode (diode 1)
2 cathode (diode 2)
3 cathode (diode 1),
anode (diode 2)
12
3
006aaa764
3
12
12
3
006aab099
12
3
12
3
006aaa763
12
3
Table 4. Ordering information
Type number Package
Name Description Version
BAS21W SC-70 plastic surface-mounted package; 3 leads SOT323
BAS21AW
BAS21SW
© Nexperia B.V. 2017. All rights
reserved
BAS21W_SER_1
Product data sheet Rev. 01 — 9 October 2009 3 of 11
Nexperia BAS21W series
High-voltage switching diodes
4. Marking
[1] * = -: made in Hong Kong
* = p: made in Hong Kong
* = t: made in Malaysia
* = W: made in China
5. Limiting values
[1] Single diode loaded.
[2] Double diode loaded.
[3] Tj=25°C prior to surge.
[4] Device mounted on an FR4 Printed-Circuit Board (PCB), single-sided copper, tin-plated and standard
footprint.
Table 5. Marking codes
Type number Marking code[1]
BAS21W X4*
BAS21AW X6*
BAS21SW X5*
Table 6. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol Parameter Conditions Min Max Unit
Per diode
VRreverse voltage - 250 V
IFforward current [1] - 225 mA
[2] - 125 mA
IFRM repetitive peak forward
current - 625 mA
IFSM non-repetitive peak forward
current square wave [3]
tp=1µs-9A
tp= 100 µs-3A
tp=10ms - 1.7 A
Per device
Ptot total power dissipation Tamb ≤25 °C[4] - 200 mW
Tjjunction temperature - 150 °C
Tamb ambient temperature −55 +150 °C
Tstg storage temperature −65 +150 °C
© Nexperia B.V. 2017. All rights
reserved
BAS21W_SER_1
Product data sheet Rev. 01 — 9 October 2009 4 of 11
Nexperia BAS21W series
High-voltage switching diodes
6. Thermal characteristics
[1] Device mounted on an FR4 PCB, single-sided copper, tin-plated and standard footprint.
7. Characteristics
[1] When switched from IF= 10 mA to IR= 10 mA; RL= 100 Ω; measured at IR= 1 mA.
Table 7. Thermal characteristics
Symbol Parameter Conditions Min Typ Max Unit
Per device
Rth(j-a) thermal resistance from
junction to ambient in free air [1] - - 625 K/W
Rth(j-sp) thermal resistance from
junction to solder point - - 300 K/W
Table 8. Characteristics
T
amb
=25
°
C unless otherwise specified.
Symbol Parameter Conditions Min Typ Max Unit
Per diode
VFforward voltage IF= 100 mA - - 1.0 V
IF= 200 mA - - 1.25 V
IRreverse current VR= 200 V - - 100 nA
VR= 200 V; Tj= 150 °C - - 100 µA
Cddiode capacitance f = 1 MHz; VR=0V - - 2 pF
trr reverse recovery time [1] --50ns
© Nexperia B.V. 2017. All rights
reserved
BAS21W_SER_1
Product data sheet Rev. 01 — 9 October 2009 5 of 11
Nexperia BAS21W series
High-voltage switching diodes
(1) Tamb = 150 °C
(2) Tamb =85°C
(3) Tamb =25°C
(4) Tamb =−40 °C
Based on square wave currents.
Tj=25°C; prior to surge
Fig 1. Forward current as a function of forward
voltage; typical values Fig 2. Non-repetitive peak forward current as a
function of pulse duration; maximum values
(1) Tamb = 150 °C
(2) Tamb =85°C
(3) Tamb =25°C
(4) Tamb =−40 °C
Fig 3. Reverse current as a function of reverse voltage; typical values
VF (V)
0 1.61.20.4 0.8
006aab212
200
400
600
IF
(mA)
0
(1) (3)
(4)
(2)
mbg703
10
1
102
IFSM
(A)
10−1
tp (µs)
110
4
103
10 102
006aab213
102
IR
(µA)
VR (V)
0 250200100 15050
10
1
10−1
10−2
10−3
10−4
10−5
(4)
(1)
(2)
(3)
© Nexperia B.V. 2017. All rights
reserved
BAS21W_SER_1
Product data sheet Rev. 01 — 9 October 2009 6 of 11
Nexperia BAS21W series
High-voltage switching diodes
8. Test information
8.1 Quality information
This product has been qualified in accordance with the Automotive Electronics Council
(AEC) standard
Q101 - Stress test qualification for discrete semiconductors
, and is
suitable for use in automotive applications.
f = 1 MHz; Tamb =25°C FR4 PCB, standard footprint
(1) Single diode loaded.
(2) Double diode loaded.
Fig 4. Diode capacitance as a function of reverse
voltage; typical values Fig 5. Forward current as a function of ambient
temperature; derating curve
mbg447
04862 VR (V)
1.0
0.8
0.2
0.6
0.4
Cd
(pF)
Tamb (°C)
0 20015050 100
006aab214
100
200
300
IF
(mA)
0
(2)
(1)
(1) IR=1mA
Fig 6. Reverse recovery time test circuit and waveforms
trr
(1)
+ IFt
output signal
trtpt
10 %
90 %
VR
input signal
V = VR + IF × RS
RS = 50 ΩIF
D.U.T.
Ri = 50 Ω
SAMPLING
OSCILLOSCOPE
mga881
© Nexperia B.V. 2017. All rights
reserved
BAS21W_SER_1
Product data sheet Rev. 01 — 9 October 2009 7 of 11
Nexperia BAS21W series
High-voltage switching diodes
9. Package outline
10. Packing information
[1] For further information and the availability of packing methods, see Section 14.
Fig 7. Package outline SOT323 (SC-70)
04-11-04Dimensions in mm
0.45
0.15
1.1
0.8
2.2
1.8
2.2
2.0 1.35
1.15
1.3
0.4
0.3 0.25
0.10
12
3
Table 9. Packing methods
The indicated -xxx are the last three digits of the 12NC ordering code.
[1]
Type number Package Description Packing quantity
3000 10000
BAS21W SOT323 4 mm pitch, 8 mm tape and reel -115 -135
BAS21AW
BAS21SW
© Nexperia B.V. 2017. All rights
reserved
BAS21W_SER_1
Product data sheet Rev. 01 — 9 October 2009 8 of 11
Nexperia BAS21W series
High-voltage switching diodes
11. Soldering
Fig 8. Reflow soldering footprint SOT323 (SC-70)
Fig 9. Wave soldering footprint SOT323 (SC-70)
solder lands
solder resist
occupied area
solder paste
sot323_fr
2.65
2.35 0.6
(3×)
0.5
(3×)
0.55
(3×)
1.325
1.85
1.3
3
2
1
Dimensions in mm
sot323_fw
3.65 2.1
1.425
(3×)
4.6
09
(2×)
2.575
1.8
solder lands
solder resist
occupied area
preferred transport
direction during soldering
Dimensions in mm
© Nexperia B.V. 2017. All rights
reserved
BAS21W_SER_1
Product data sheet Rev. 01 — 9 October 2009 9 of 11
Nexperia BAS21W series
High-voltage switching diodes
12. Revision history
Table 10. Revision history
Document ID Release date Data sheet status Change notice Supersedes
BAS21W_SER_1 20091009 Product data sheet - -
© Nexperia B.V. 2017. All rights
reserved
BAS21W_SER_1
Product data sheet Rev. 01 — 9 October 2009 10 of 11
Nexperia BAS21W series
High-voltage switching diodes
13. Legal information
13.1 Data sheet status
[1] Please consult the most recently issued document before initiating or completing a design.
[2] The term ‘short data sheet’ is explained in section “Definitions”.
[3] The product status of device(s) described in this document may have changed since this document was published and may differ in case of multiple devices. The latest product status
information is available on the Internet at URL http://www.nexperia.com.
damage. Nexperia accepts no liability for inclusion and/or use of Nexperia
products in such equipment or applications and therefore such inclusion and/
or use is at the customer’s own risk.
Applications — Applications that are described herein for any of these
products are for illustrative purposes only. Nexperia makes no representation
or warranty that such applications will be suitable for the specified use
without further testing or modification.
Limiting values — Stress above one or more limiting values (as defined in
the Absolute Maximum Ratings System of IEC 60134) may cause permanent
damage to the device. Limiting values are stress ratings only and operation of
the device at these or any other conditions above those given in the
Characteristics sections of this document is not implied. Exposure to limiting
values for extended periods may affect device reliability.
Terms and conditions of sale — Nexperia products are sold subject to the
general terms and conditions of commercial sale, as published at http://
www.nexperia.com/profile/terms, including those pertaining to warranty,
intellectual property rights infringement and limitation of liability, unless
explicitly otherwise agreed to in writing by Nexperia. In case of any
inconsistency or conflict between information in this document and such
terms and conditions, the latter will prevail.
No offer to sell or license — Nothing in this document may be interpreted
or construed as an offer to sell products that is open for acceptance or the
grant, conveyance or implication of any license under any copyrights, patents
or other industrial or intellectual property rights.
Export control — This document as well as the item(s) described herein
may be subject to export control regulations. Export might require a prior
authorization from national authorities.
Quick reference data — The Quick reference data is an extract of the
product data given in the Limiting values and Characteristics sections of this
document, and as such is not complete, exhaustive or legally binding.
13.4 Trademarks
Notice: All referenced brands, product names, service names and trademarks
are the property of their respective owners.
13.2 Definitions
Draft — The document is a draft version only. The content is still under
internal review and subject to formal approval, which may result in
modifications or additions. Nexperia does not give any representations or
warranties as to the accuracy or completeness of information included herein
and shall have no liability for the consequences of use of such information.
Short data sheet — A short data sheet is an extract from a full data sheet
with the same product type number(s) and title. A short data sheet is
intended for quick reference only and should not be relied upon to contain
detailed and full information. For detailed and full information see the
relevant full data sheet, which is available on request via the local Nexperia
sales office. In case of any inconsistency or conflict with the short data sheet,
the full data sheet shall prevail.
13.3 Disclaimers
General — Information in this document is believed to be accurate and
reliable. However, Nexperia does not give any representations or warranties,
expressed or implied, as to the accuracy or completeness of such information
and shall have no liability for the consequences of use of such information.
Right to make changes — Nexperia reserves the right to make changes to
information published in this document, including without limitation
specifications and product descriptions, at any time and without notice. This
document supersedes and replaces all information supplied prior to the
publication hereof.
Suitability for use — Nexperia products are not designed, authorized or
warranted to be suitable for use in medical, military, aircraft, space or life
support equipment, nor in applications where failure or malfunction of an
Nexperia product can reasonably be expected to result in personal injury,
death or severe property or environmental
14. Contact information
For more information, please visit: http://www.nexperia.com
For sales office addresses, please send an email to:
salesaddresses@nexperia.com
Document status[1][2] Product status[3] Definition
Objective [short] data sheet Development This document contains data from the objective specification for product development.
Preliminary [short] data sheet Qualification This document contains data from the preliminary specification.
Product [short] data sheet Production This document contains the product specification.
Nexperia BAS21W series
High-voltage switching diodes
15. Contents
1 Product profile . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.1 General description. . . . . . . . . . . . . . . . . . . . . . 1
1.2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.3 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.4 Quick reference data. . . . . . . . . . . . . . . . . . . . . 1
2 Pinning information. . . . . . . . . . . . . . . . . . . . . . 2
3 Ordering information. . . . . . . . . . . . . . . . . . . . . 2
4 Marking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
5 Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 3
6 Thermal characteristics. . . . . . . . . . . . . . . . . . . 4
7 Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . 4
8 Test information. . . . . . . . . . . . . . . . . . . . . . . . . 6
8.1 Quality information . . . . . . . . . . . . . . . . . . . . . . 6
9 Package outline . . . . . . . . . . . . . . . . . . . . . . . . . 7
10 Packing information. . . . . . . . . . . . . . . . . . . . . . 7
11 Soldering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
12 Revision history. . . . . . . . . . . . . . . . . . . . . . . . . 9
13 Legal information. . . . . . . . . . . . . . . . . . . . . . . 10
13.1 Data sheet status . . . . . . . . . . . . . . . . . . . . . . 10
13.2 Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
13.3 Disclaimers. . . . . . . . . . . . . . . . . . . . . . . . . . . 10
13.4 Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 10
14 Contact information. . . . . . . . . . . . . . . . . . . . . 10
15 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
© Nexperia B.V. 2017. All rights reserved
For more information, please visit: http://www.nexperia.com
For sales office addresses, please send an email to: salesaddresses@nexperia.com
Date of release:
09 October 2009
