BY203-12S, BY203-16S, BY203-20S
Vishay Semiconductors
Fast Avalanche Sinterglass Diode
FEATURES
• Glass passivated junction
• Hermetically sealed package
• Compliant to RoHS directive 2002/95/EC and in
accordance to WEEE 2002/96/EC
• Halogen-free according to IEC 61249-2-21
definition
APPLICATIONS
949539
MECHANICAL DATA
Case:
SOD-57 sintered glass case
Terminals:
plated axial leads, solderable per MIL-STD-750,
method 2026
Polarity:
color band denotes cathode end
Mounting position:
any
Weight:
approx. 369 mg
• Fast rectification and switching avalanche sinterglass
diode for TV-line output circuits an switch mode power
supply
PARTS TABLE
PART
BY203-12S
BY203-16S
BY203-20S
TYPE DIFFERENTIATION
V
R
= 1200 V; I
FAV
= 250 mA
V
R
= 1600 V; I
FAV
= 250 mA
V
R
= 2000 V; I
FAV
= 250 mA
PACKAGE
SOD-57
SOD-57
SOD-57
ABSOLUTE MAXIMUM RATINGS
(T
amb
= 25 °C, unless otherwise specified)
PARAMETER
Reverse voltage = repetitive peak
reverse voltage
Peak forward surge current
Average forward current
Non repetitive reverse avalanche
energy
Junction temperature range
Storage temperature range
I
(BR)R
= 0.4 A
TEST CONDITION
l
R
= 100 μA
t
p
= 10 ms, half sine wave
PART
BY203-12S
BY203-16S
BY203-20S
SYMBOL
V
R
= V
RRM
V
R
= V
RRM
V
R
= V
RRM
I
FSM
I
FAV
E
R
T
j
T
stg
VALUE
1200
1600
2000
20
250
10
- 55 to + 150
- 55 to + 175
UNIT
V
V
V
A
mA
mJ
°C
°C
MAXIMUM THERMAL RESISTANCE
(T
amb
= 25 °C, unless otherwise specified)
PARAMETER
Junction ambient
TEST CONDITION
Lead length l = 10 mm, T
L
= constant
Maximum lead lenght
SYMBOL
R
thJA
R
thJA
VALUE
45
100
UNIT
K/W
K/W
Document Number: 86002
Rev. 1.8, 30-Jul-10
For technical questions within your region, please contact one of the following:
DiodesAmericas@vishay.com, DiodesAsia@vishay.com, DiodesEurope@vishay.com
www.vishay.com
1
BY203-12S, BY203-16S, BY203-20S
Vishay Semiconductors
Fast Avalanche Sinterglass Diode
ELECTRICAL CHARACTERISTICS
(T
amb
= 25 °C, unless otherwise specified)
PARAMETER
Forward voltage
Reverse current
TEST CONDITION
I
F
= 200 mA, t
p
/T = 0.01, t
p
= 0.3ms
V
R
= 700 V
V
R
= 1000 V
V
R
= 1200 V
Breakdown voltage
Reverse recovery time
l
R
= 100 μA, t
p
/T = 0.01, t
p
= 0.3 ms
I
F
= 0.5 A, I
R
= 1 A, i
R
= 0.25 A
BY203-12S
BY203-16S
BY203-20S
BY203-12S
BY203-16S
BY203-20S
PART
SYMBOL
V
F
I
R
I
R
I
R
V
(BR)
V
(BR)
V
(BR)
t
rr
MIN.
-
-
-
-
1200
1600
2000
-
TYP.
-
-
-
-
-
-
-
-
MAX.
2.4
2
2
2
-
-
-
300
UNIT
V
μA
μA
μA
V
V
V
ns
TYPICAL CHARACTERISTICS
(T
amb
= 25
°C,
unless otherwise specified)
240
200
160
120
80
40
0
0
949080
0.30
I
FAV
- Average Forward Current (A)
T
j
- Junction Temperature (°C)
R
thJA
= 45 K/W
I = 10 mm
0.25
0.20
0.15
0.10
0.05
0
V
R
= V
RRM
half
sinewave
0
30
60
90
120
150
R
thJA
= 100 K/W
PCB: d = 25 mm
V
RRM
BY203/12
BY203/16
V
R
BY203/20
400
800
1200
1600
16398
V
R
, V
RRM
- Rev./Rep. Peak Rev. Voltage (V)
T
amb
- Ambient Temperature (°C)
Fig. 1 - Junction Temperature vs.
Reverse/Repetitive Peak Reverse Voltage
Fig. 3 - Max. Average Forward Current vs.
Ambient Temperature
10
1000
V
R
= V
RRM
1
T
j
= 175 °C
0.1
T
j
= 25 °C
I
R
- Reverse Current (μA)
4
5.0
I
F
- Forward Current (A)
100
10
0.01
0.001
0
16397
1
2
3
1
25
16399
50
75
100
125
150
V
F
- Forward Voltage (V)
T
j
- Junction Temperature (°C)
Fig. 2 - Max. Forward Current vs. Forward Voltage
Fig. 4 - Max. Reverse Current vs. Junction Temperature
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2
For technical questions within your region, please contact one of the following:
DiodesAmericas@vishay.com, DiodesAsia@vishay.com, DiodesEurope@vishay.com
Document Number: 86002
Rev. 1.8, 30-Jul-10
BY203-12S, BY203-16S, BY203-20S
Fast Avalanche Sinterglass Diode
Vishay Semiconductors
P
R
- Reverse Power Dissipation (mW)
500
V
R
= V
RRM
400
P
R
-Limit
at 100 % V
R
P
R
-Limit
at 80 % V
R
18
C
D
- Diode Capacitance (pF)
16
14
12
10
8
6
4
2
0
0.1
1
10
f = 1 MHz
300
200
100
0
25
50
75
100
125
150
16401
100
16400
T
j
- Junction Temperature (°C)
V
R
- Reverse Voltage (V)
Fig. 5 - Max. Reverse Power Dissipation vs. Junction Temperature
Fig. 6 - Diode Capacitance vs. Reverse Voltage
PACKAGE DIMENSIONS
in millimeters (inches):
SOD-57
0.82 (0.032) max.
26 (1.024) min.
4 (0.157) max.
26 (1.024) min.
Document Number: 86002
Rev. 1.8, 30-Jul-10
3.6 (0.142) max.
20543
For technical questions within your region, please contact one of the following:
DiodesAmericas@vishay.com, DiodesAsia@vishay.com, DiodesEurope@vishay.com
www.vishay.com
3
Legal Disclaimer Notice
Vishay
Disclaimer
ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE
RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE.
Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively,
“Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained in any datasheet or in any other
disclosure relating to any product.
Vishay makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose or
the continuing production of any product. To the maximum extent permitted by applicable law, Vishay disclaims (i) any and all
liability arising out of the application or use of any product, (ii) any and all liability, including without limitation special,
consequential or incidental damages, and (iii) any and all implied warranties, including warranties of fitness for particular
purpose, non-infringement and merchantability.
Statements regarding the suitability of products for certain types of applications are based on Vishay’s knowledge of typical
requirements that are often placed on Vishay products in generic applications. Such statements are not binding statements
about the suitability of products for a particular application. It is the customer’s responsibility to validate that a particular
product with the properties described in the product specification is suitable for use in a particular application. Parameters
provided in datasheets and/or specifications may vary in different applications and performance may vary over time. All
operating parameters, including typical parameters, must be validated for each customer application by the customer’s
technical experts. Product specifications do not expand or otherwise modify Vishay’s terms and conditions of purchase,
including but not limited to the warranty expressed therein.
Except as expressly indicated in writing, Vishay products are not designed for use in medical, life-saving, or life-sustaining
applications or for any other application in which the failure of the Vishay product could result in personal injury or death.
Customers using or selling Vishay products not expressly indicated for use in such applications do so at their own risk and agree
to fully indemnify and hold Vishay and its distributors harmless from and against any and all claims, liabilities, expenses and
damages arising or resulting in connection with such use or sale, including attorneys fees, even if such claim alleges that Vishay
or its distributor was negligent regarding the design or manufacture of the part. Please contact authorized Vishay personnel to
obtain written terms and conditions regarding products designed for such applications.
No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document or by
any conduct of Vishay. Product names and markings noted herein may be trademarks of their respective owners.
Document Number: 91000
Revision: 11-Mar-11
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