BYW178
www.vishay.com
Vishay Semiconductors
Rev. 1.8, 11-Sep-12
1
Document Number: 86047
For technical questions within your region: DiodesAmericas@vishay.com
, DiodesAsia@vishay.com, DiodesEurope@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
Fast Avalanche Sinterglass Diode
MECHANICAL DATA
Case: SOD-64
Terminals: plated axial leads, solderable per MIL-STD-750,
method 2026
Polarity: color band denotes cathode end
Mounting position: any
Weight: approx. 858 mg
FEATURES
• Glass passivated junction
• Hermetically sealed package
• Low reverse current
• Soft recovery characteristics
• Very fast reverse recovery time
• Material categorization:
For definitions of compliance please see
www.vishay.com/doc?99912
APPLICATIONS
• Ultrafast rectification diode for switching mode power
supplies
ORDERING INFORMATION (Example)
DEVICE NAME ORDERING CODE TAPED UNITS MINIMUM ORDER QUANTITY
BYW178 BYW178-TR 2500 per 10" tape and reel 12 500
BYW178 BYW178-TAP 2500 per ammopack 12 500
PARTS TABLE
PART TYPE DIFFERENTIATION PACKAGE
BYW178 V
R
= 800 V; I
F(AV)
= 3 A SOD-64
ABSOLUTE MAXIMUM RATINGS (T
amb
= 25 °C, unless otherwise specified)
PARAMETER TEST CONDITION PART SYMBOL VALUE UNIT
Reverse voltage = repetitive peak reverse
voltage
See electrical characteristics BYW178 V
R
= V
RRM
800 V
Peak forward surge current t
p
= 10 ms, half sine wave I
FSM
80
ARepetitive peak forward current I
FRM
15
Average forward current I
F(AV)
3
Junction and storage temperature range T
j
= T
stg
- 55 to + 175 °C
Non repetitive reverse avalanche energy I
(BR)R
= 1 A E
R
20 mJ
MAXIMUM THERMAL RESISTANCE (T
amb
= 25 °C, unless otherwise specified)
PARAMETER TEST CONDITION SYMBOL VALUE UNIT
Junction lead Lead length l = 10 mm, T
L
= constant R
thJL
25 K/W
Junction ambient On PC board with spacing 37.5 mm R
thJA
70 K/W