Vishay - BY203-12S 16S 20S Data Handbook/Specifications
Summary
This Vishay BY203 series Fast Avalanche Sinterglass Diode is a high-performance component designed for fast rectification and switching applications, particularly in TV-line output circuits and switch mode power supplies. The accompanying manual provides comprehensive technical specs, including absolute maximum ratings, detailed electrical characteristics (V_RRM, I_F), package information, and thermal performance data. This product is essential for electronic engineers designing reliable and efficient power electronics.
Page 1 Text Content
BY203-12S / 16S / 20S Vishay Semiconductors
Fast Avalanche Sinterglass Diode
Features Glass passivated junction Hermetically sealed package
Lead (Pb)-free component Component in accordance to Ro HS 2002/95/EC and WEEE 2002/96/EC
Applications Fast rectification and switching avalanche sinterglass diode for TV-line output circuits and switch mode power supply
Mechanical Data Polarity: Color band denotes cathode end Case: SOD-57 Sintered glass case Mounting Position: Any Terminals: Plated axial leads, solderable per Weight: approx. 369 mg
MIL-STD-750, Method 2026
Parts Table
Part Type differentiation Package
BY203-12S VR = 1200 V; IFAV = 250 m A SOD-57
BY203-16S VR = 1600 V; IFAV = 250 m A SOD-57
BY203-20S VR = 2000 V; IFAV = 250 m A SOD-57
Absolute Maximum Ratings Tamb = 25 °C, unless otherwise specified
Parameter Test condition Part Symbol Value Unit
Reverse voltage = Repetitive IR = 100 µA BY203-12S VR = VRRM
peak reverse voltage
BY203-16S VR = VRRM BY203-20S VR = VRRM
Average forward current IFAV m A Peak forward surge current tp = 10 ms half sinewave IFSM Junction temperature range Tj -55 to +150 °C Storage temperature range Tstg -55 to +175 °C Non repetitive reverse I(BR)R = 0.4 A ER m J avalanche energy
Maximum Thermal Resistance Tamb = 25 °C, unless otherwise specified
Parameter Test condition Symbol Value Unit
Junction ambient l = 10 mm, TL = constant Rth JA K/W
maximum lead length Rth JA K/W
Document Number 86002 www.vishay.com Rev. 1.7, 13-Apr-05
Page Summary Contents For Vishay - BY203-12S 16S 20S Data Handbook/Specifications
Manual Details
| Brand | Vishay |
|---|---|
| Pages | 5 |
| File Size | 112.01 KB |
| Published | June 15, 2026 |
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Frequently Asked Questions
What is the maximum operating temperature range?
The junction temperature range is -55 to +150 °C.
Are these components compliant with safety regulations?
Yes, they are Pb-free, lead (Pb)-free, and component in accordance with RoHS 2002/95/EC and WEEE 2002/96/EC.
What is the physical package type?
It comes in a SOD-57 Sintered glass case.
Who should validate the operating parameters?
All operating parameters must be validated for each customer application by the customer.