1. Product profile
1.1 General description
Planar Schottky barrier diodes with an integrated guard ring for stress protection.
Encapsulated in small Surface-Mounted Device (SMD) plastic packages.
1.2 Features
nLow forward voltage
nSmall SMD plastic packages
nLow capacitance
1.3 Applications
nUltra high-speed switching
nVoltage clamping
nLine termination
nReverse polarity protection
1.4 Quick reference data
[1] Pulse test: tp≤300 µs; δ≤0.02.
1PS76SB21; BAT721 series
Schottky barrier diodes in small packages
Rev. 06 — 21 December 2006 Product data sheet
Table 1. Product overview
Type number Package Configuration
Nexperia JEITA
1PS76SB21 SOD323 SC-76 single
BAT721 SOT23 - single
BAT721A SOT23 - dual common anode
BAT721C SOT23 - dual common cathode
BAT721S SOT23 - dual series
Table 2. Quick reference data
Symbol Parameter Conditions Min Typ Max Unit
Per diode
IFforward current - - 200 mA
VRreverse voltage - - 40 V
VFforward voltage IF= 200 mA [1] - - 550 mV
1PS76SB21_BAT721_SER_6
Product data sheet Rev. 06 — 21 December 2006 2 of 11
Nexperia 1PS76SB21; BAT721 series
Schottky barrier diodes in small packages
2. Pinning information
[1] The marking bar indicates the cathode.
Table 3. Pinning
Pin Description Simplified outline Symbol
1PS76SB21
1 cathode [1]
2 anode
BAT721
1 anode
2 not connected
3 cathode
BAT721A
1 cathode (diode 1)
2 cathode (diode 2)
3 anode (diode 1),
anode (diode 2)
BAT721C
1 anode (diode 1)
2 anode (diode 2)
3 cathode (diode 1),
cathode (diode 2)
BAT721S
1 anode (diode 1)
2 cathode (diode 2)
3 cathode (diode 1),
anode (diode 2)
21
sym001
12
006aaa144
12
3
006aaa436
1
3
2
n.c.
006aaa144
12
3
006aaa439
12
3
006aaa144
12
3
006aaa438
12
3
006aaa144
12
3
006aaa437
12
3
© Nexperia B.V. 2017. All rights reserved
1PS76SB21_BAT721_SER_6
Product data sheet Rev. 06 — 21 December 2006 3 of 11
Nexperia 1PS76SB21; BAT721 series
Schottky barrier diodes in small packages
3. Ordering information
4. Marking
[1] * = -: made in Hong Kong
* = p: made in Hong Kong
* = t: made in Malaysia
* = W: made in China
5. Limiting values
Table 4. Ordering information
Type number Package
Name Description Version
1PS76SB21 SC-76 plastic surface-mounted package; 2 leads SOD323
BAT721 - plastic surface-mounted package; 3 leads SOT23
BAT721A
BAT721C
BAT721S
Table 5. Marking codes
Type number Marking code[1]
1PS76SB21 S1
BAT721 L7*
BAT721A L8*
BAT721C L9*
BAT721S L0*
Table 6. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol Parameter Conditions Min Max Unit
Per diode
VRreverse voltage - 40 V
IFforward current - 200 mA
IFSM non-repetitive peak forward
current half sine wave;
JEDEC method;
tp= 8.3 ms
-1A
Tjjunction temperature - 125 °C
Tamb ambient temperature −65 +150 °C
Tstg storage temperature −65 +150 °C
© Nexperia B.V. 2017. All rights reserved
1PS76SB21_BAT721_SER_6
Product data sheet Rev. 06 — 21 December 2006 4 of 11
Nexperia 1PS76SB21; BAT721 series
Schottky barrier diodes in small packages
6. Thermal characteristics
[1] Device mounted on an FR4 Printed-Circuit Board (PCB), single-sided copper, tin-plated and standard
footprint.
7. Characteristics
[1] Pulse test: tp≤300 µs; δ≤0.02.
Table 7. Thermal characteristics
Symbol Parameter Conditions Min Typ Max Unit
Per diode
Rth(j-a) thermal resistance from
junction to ambient in free air [1]
1PS76SB21 - - 450 K/W
BAT721 - - 500 K/W
BAT721A - - 500 K/W
BAT721C - - 500 K/W
BAT721S - - 500 K/W
Table 8. Characteristics
T
amb
=25
°
C unless otherwise specified.
Symbol Parameter Conditions Min Typ Max Unit
Per diode
VFforward voltage IF=10mA [1] - - 300 mV
IF= 100 mA [1] - - 420 mV
IF= 200 mA [1] - - 550 mV
IRreverse current VR=30V --15µA
VR= 30 V; Tj= 100 °C --3 mA
Cddiode capacitance VR= 0 V; f = 1 MHz - 40 50 pF
© Nexperia B.V. 2017. All rights reserved
1PS76SB21_BAT721_SER_6
Product data sheet Rev. 06 — 21 December 2006 5 of 11
Nexperia 1PS76SB21; BAT721 series
Schottky barrier diodes in small packages
(1) Tamb = 125 °C
(2) Tamb =85°C
(3) Tamb =25°C
(4) Tamb =−40 °C
(1) Tamb = 125 °C
(2) Tamb =85°C
(3) Tamb =25°C
(4) Tamb =−40 °C
Fig 1. Forward current as a function of forward
voltage; typical values Fig 2. Reverse current as a function of reverse
voltage; typical values
Tamb =25°C; f = 1 MHz
Fig 3. Diode capacitance as a function of reverse voltage; typical values
006aaa689
1
10
102
103
IF
(mA)
10−1
VF (mV)
0 600400200
(1) (2) (3) (4)
006aaa690
IR
(mA)
VR (V)
0403010 20
10−4
10−2
1
10
10−5
10−3
10−1
10−6
(1)
(2)
(3)
(4)
4030 VR (V)
Cd
(pF)
01020
102
10
1
mbk574
© Nexperia B.V. 2017. All rights reserved
1PS76SB21_BAT721_SER_6
Product data sheet Rev. 06 — 21 December 2006 6 of 11
Nexperia 1PS76SB21; BAT721 series
Schottky barrier diodes in small packages
8. Package outline
9. Packing information
[1] For further information and the availability of packing methods, see Section 13.
Fig 4. Package outline SOD323 (SC-76) Fig 5. Package outline SOT23
03-12-17Dimensions in mm
0.25
0.10
0.45
0.15
2.7
2.3 1.8
1.6
0.40
0.25
1.1
0.8
1.35
1.15
1
2
04-11-04Dimensions in mm
0.45
0.15
1.9
1.1
0.9
3.0
2.8
2.5
2.1 1.4
1.2
0.48
0.38 0.15
0.09
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
1PS76SB21 SOD323 4 mm pitch, 8 mm tape and reel -115 -135
BAT721 SOT23 4 mm pitch, 8 mm tape and reel -215 -235
BAT721A
BAT721C
BAT721S
© Nexperia B.V. 2017. All rights reserved
1PS76SB21_BAT721_SER_6
Product data sheet Rev. 06 — 21 December 2006 7 of 11
Nexperia 1PS76SB21; BAT721 series
Schottky barrier diodes in small packages
10. Soldering
Dimensions in mm
Fig 6. Reflow soldering footprint SOD323 (SC-76)
Dimensions in mm
Fig 7. Wave soldering footprint SOD323 (SC-76)
msa433
1.65
0.50
(2×)
2.10
1.60
2.80
0.60
3.05
0.500.95
solder lands
solder resist
occupied area
solder paste
msa415
1.40
4.40
5.00
1.202.75
preferred transport direction during soldering
solder lands
solder resist
occupied area
© Nexperia B.V. 2017. All rights reserved
1PS76SB21_BAT721_SER_6
Product data sheet Rev. 06 — 21 December 2006 8 of 11
Nexperia 1PS76SB21; BAT721 series
Schottky barrier diodes in small packages
Dimensions in mm
Fig 8. Reflow soldering footprint SOT23
Dimensions in mm
Fig 9. Wave soldering footprint SOT23
MSA439
1.00
0.60
(3x)
1.30
12
3
2.50
3.00 0.85 2.70
2.90
0.50 (3x)
0.60 (3x)
3.30
0.85
solder lands
solder resist
occupied area
solder paste
MSA427
4.00
4.60
2.80
4.50
1.20
3.40
3
21
1.20 (2x)
preferred transport direction during soldering
solder lands
solder resist
occupied area
© Nexperia B.V. 2017. All rights reserved
1PS76SB21_BAT721_SER_6
Product data sheet Rev. 06 — 21 December 2006 9 of 11
Nexperia 1PS76SB21; BAT721 series
Schottky barrier diodes in small packages
11. Revision history
Table 10. Revision history
Document ID Release date Data sheet status Change notice Supersedes
1PS76SB21_BAT721_SER_6 20061221 Product data sheet - 1PS76SB21_BAT721
_SER_5
Modifications: •Amended Table 10 “Revision history”
1PS76SB21_BAT721_SER_5 20061205 Product data sheet - BAT721_SERIES_4
1PS76SB21_3
Modifications: •The format of this data sheet has been redesigned to comply with the new identity
guidelines of NXP Semiconductors.
•Legal texts have been adapted to the new company name where appropriate.
•This data sheet is a combination of data sheets BAT721_SERIES_4 and
1PS76SB21_3.
•Table 1 “Product overview”: added
•Section 1.2 “Features”: amended
•Section 1.3 “Applications”: amended
•Table 2 “Quick reference data”: added
•Table 5 “Marking codes”: for 1PS76SB21 amended
•Table 5 “Marking codes”: enhanced table note section
•Table 6 “Limiting values”: indication per diode added
•Table 6 “Limiting values”: for 1PS76SB21 IFSM condition amended
•Table 6 “Limiting values”: Tamb ambient temperature added
•Table 7 “Thermal characteristics”: indication per diode added
•Table 7: Rth(j-a) thermal resistance from junction to ambient condition amended
•Table 8 “Characteristics”: indication per diode added
•Table 8 “Characteristics”: reference to Table note 1 amended
•Table 8: for 1PS76SB21 Cd minimum value changed to typical value
•Figure 1 and 2: amended
•Figure 4 and 5: superseded by minimized package outlines
•Section 9 “Packing information”: added
•Section 10 “Soldering”: added
•Section 12 “Legal information”: updated
BAT721_SERIES_4 20040315 Product specification - BAT721_SERIES_3
1PS76SB21_3 20040126 Product specification - 1PS76SB21_2
© Nexperia B.V. 2017. All rights reserved
1PS76SB21_BAT721_SER_6
Product data sheet Rev. 06 — 21 December 2006 10 of 11
Nexperia 1PS76SB21; BAT721 series
Schottky barrier diodes in small packages
12. Legal information
12.1 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.
12.2 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.
12.3 Disclaimers
General — Information in this document is believed to be accurate and
reliable.However,Nexperiadoesnotgiveanyrepresentationsor
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 — Nexperiareservestherighttomake
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
malfunctionofaNexperiaproductcanreasonablybeexpectedto
result in personal injury, death or severe property or environmental 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.
12.4 Trademarks
Notice: All referenced brands, product names, service names and trademarks
are the property of their respective owners.
13. Contact information
For additional information, please visit: http://www.nexperia.com
For sales office addresses, 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 B.V. 2017. All rights reserved
Nexperia 1PS76SB21; BAT721 series
Schottky barrier diodes in small packages
14. 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. . . . . . . . . . . . . . . . . . . . . 3
4 Marking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
5 Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 3
6 Thermal characteristics. . . . . . . . . . . . . . . . . . . 4
7 Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . 4
8 Package outline . . . . . . . . . . . . . . . . . . . . . . . . . 6
9 Packing information. . . . . . . . . . . . . . . . . . . . . . 6
10 Soldering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
11 Revision history. . . . . . . . . . . . . . . . . . . . . . . . . 9
12 Legal information. . . . . . . . . . . . . . . . . . . . . . . 10
12.1 Data sheet status . . . . . . . . . . . . . . . . . . . . . . 10
12.2 Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
12.3 Disclaimers. . . . . . . . . . . . . . . . . . . . . . . . . . . 10
12.4 Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 10
13 Contact information. . . . . . . . . . . . . . . . . . . . . 10
14 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:
21 December 2006
